//
// CD handler
//
-// by David Raingeard
+// Originally by David Raingeard
// GCC/SDL port by Niels Wagenaar (Linux/WIN32) and Caz (BeOS)
-// Cleanups/fixes by James L. Hammons
+// Extensive rewrites/cleanups/fixes by James L. Hammons
//
+#include "jaguar.h" // For GET32/SET32 macros
#include "m68k.h"
+#include "cdintf.h" // System agnostic CD interface functions
#include "cdrom.h"
-
#define CDROM_LOG // For CDROM logging, obviously
/*
O_FIFODAT equ $24 ; i2s FIFO data
O_I2SDAT2 equ $28 ; i2s FIFO data (old)
*/
-char * BReg[11] = { "BUTCH", "DSCNTRL", "DS_DATA", "I2CNTRL", "SBCNTRL", "SUBDATA", "SUBDATB",
- "SB_TIME", "FIFO_DATA", "I2SDAT1", "I2SDAT2" };
+
+/*
+Commands sent through DS_DATA:
+
+$01nn - ? Play track nn ? Seek to track nn ?
+$0200 - Stop CD
+$03nn - Read session nn TOC (short)
+$0400 - Pause CD
+$0500 - Unpause CD
+$10nn - Goto (min?)
+$11nn - Goto (sec?)
+$12nn - Goto (frm?)
+$14nn - Read session nn TOC (full)
+$15nn - Set CD mode
+$18nn - Spin up CD to session nn
+$5000 - ?
+$5100 - Mute CD (audio mode only)
+$51FF - Unmute CD (audio mode only)
+$5400 - Read # of sessions on CD
+$70nn - Set oversampling mode
+
+Commands send through serial bus:
+
+$100 - ? Acknowledge ?
+$130 - ? (Seems to always prefix the $14n commands)
+$140 - Returns ACK (1) (Write to NVRAM?)
+$141 - Returns ACK (1)
+$142 - Returns ACK (1)
+$143 - Returns ACK (1)
+$144 - Returns ACK (1)
+$145 - Returns ACK (1)
+$180 - Returns 16-bit value (NVRAM?)
+$181 - Returns 16-bit value
+$182 - Returns 16-bit value
+$183 - Returns 16-bit value
+$184 - Returns 16-bit value
+$185 - Returns 16-bit value
+*/
+
+// Private function prototypes
+
+static void CDROMBusWrite(uint16);
+static uint16 CDROMBusRead(void);
+
+#define BUTCH 0x00 // base of Butch=interrupt control register, R/W
+#define DSCNTRL BUTCH + 0x04 // DSA control register, R/W
+#define DS_DATA BUTCH + 0x0A // DSA TX/RX data, R/W
+#define I2CNTRL BUTCH + 0x10 // i2s bus control register, R/W
+#define SBCNTRL BUTCH + 0x14 // CD subcode control register, R/W
+#define SUBDATA BUTCH + 0x18 // Subcode data register A
+#define SUBDATB BUTCH + 0x1C // Subcode data register B
+#define SB_TIME BUTCH + 0x20 // Subcode time and compare enable (D24)
+#define FIFO_DATA BUTCH + 0x24 // i2s FIFO data
+#define I2SDAT2 BUTCH + 0x28 // i2s FIFO data (old)
+#define UNKNOWN BUTCH + 0x2C // Seems to be some sort of I2S interface
+
+char * BReg[12] = { "BUTCH", "DSCNTRL", "DS_DATA", "???", "I2CNTRL", "SBCNTRL", "SUBDATA", "SUBDATB",
+ "SB_TIME", "FIFO_DATA", "I2SDAT2", "UNKNOWN" };
extern char * whoName[9];
-static uint8 cdrom_ram[0x100];
-static uint16 cdrom_cmd = 0;
+static uint8 cdRam[0x100];
+static uint16 cdCmd = 0, cdPtr = 0;
+static bool haveCDGoodness;
+static uint32 min, sec, frm, block;
+static uint8 cdBuf[2352 + 96];
+static uint32 cdBufPtr = 2352;
+//Also need to set up (save/restore) the CD's NVRAM
+
+
+extern bool GetRawTOC(void);
+void CDROMInit(void)
+{
+ haveCDGoodness = CDIntfInit();
+
+//GetRawTOC();
+/*uint8 buf[2448];
+uint32 sec = 18667 - 150;
+memset(buf, 0, 2448);
+if (!CDIntfReadBlock(sec, buf))
+{
+ WriteLog("CDROM: Attempt to read with subchannel data failed!\n");
+ return;
+}
+//24x98+96
+//96=4x24=4x4x6
+WriteLog("\nCDROM: Read sector %u...\n\n", sec);
+for(int i=0; i<98; i++)
+{
+ WriteLog("%04X: ", i*24);
+ for(int j=0; j<24; j++)
+ {
+ WriteLog("%02X ", buf[j + (i*24)]);
+ }
+ WriteLog("\n");
+}
+WriteLog("\nRaw P-W subchannel data:\n\n");
+for(int i=0; i<6; i++)
+{
+ WriteLog("%02X: ", i*16);
+ for(int j=0; j<16; j++)
+ {
+ WriteLog("%02X ", buf[2352 + j + (i*16)]);
+ }
+ WriteLog("\n");
+}
+WriteLog("\nP subchannel data: ");
+for(int i=0; i<96; i+=8)
+{
+ uint8 b = 0;
+ for(int j=0; j<8; j++)
+ b |= ((buf[2352 + i + j] & 0x80) >> 7) << (7 - j);
-void cdrom_init(void)
+ WriteLog("%02X ", b);
+}
+WriteLog("\nQ subchannel data: ");
+for(int i=0; i<96; i+=8)
{
+ uint8 b = 0;
+ for(int j=0; j<8; j++)
+ b |= ((buf[2352 + i + j] & 0x40) >> 6) << (7 - j);
+
+ WriteLog("%02X ", b);
+}
+WriteLog("\n\n");//*/
}
-void cdrom_reset(void)
+void CDROMReset(void)
{
- memset(cdrom_ram, 0x00, 0x100);
- cdrom_cmd = 0;
+ memset(cdRam, 0x00, 0x100);
+ cdCmd = 0;
}
-void cdrom_done(void)
+void CDROMDone(void)
{
+ CDIntfDone();
}
+
+//
+// This approach is probably wrong, but let's do it for now.
+// What's needed is a complete overhaul of the interrupt system so that
+// interrupts are handled as they're generated--instead of the current
+// scheme where they're handled on scanline boundaries.
+//
+void BUTCHExec(uint32 cycles)
+{
+return;
+ extern uint8 * jerry_ram_8; // Hmm.
+
+ // For now, we just do the FIFO interrupt. Timing is also likely to be WRONG as well.
+ uint32 cdState = GET32(cdRam, BUTCH);
+
+ if (!(cdState & 0x01)) // No BUTCH interrupts enabled
+ return;
+
+ if (!(cdState & 0x22))
+ return; // For now, we only handle FIFO/buffer full interrupts...
+
+ // From what I can make out, it seems that each FIFO is 32 bytes long
+
+// DSPSetIRQLine(DSPIRQ_EXT, ASSERT_LINE);
+//I'm *sure* this is wrong--prolly need to generate DSP IRQs as well!
+ if (jerry_ram_8[0x23] & 0x3F) // Only generate an IRQ if enabled!
+ GPUSetIRQLine(GPUIRQ_DSP, ASSERT_LINE);
+}
+
+
//
// CD-ROM memory access functions
//
uint8 CDROMReadByte(uint32 offset, uint32 who/*=UNKNOWN*/)
{
#ifdef CDROM_LOG
- if ((offset & 0xFF) < 11 * 4)
+ if ((offset & 0xFF) < 12 * 4)
WriteLog("[%s] ", BReg[(offset & 0xFF) / 4]);
- WriteLog("CDROM: %s reading byte $%02X from $%08X [68K PC=$%08X]\n", whoName[who], offset, cdrom_ram[offset & 0xFF], m68k_get_reg(NULL, M68K_REG_PC));
+ WriteLog("CDROM: %s reading byte $%02X from $%08X [68K PC=$%08X]\n", whoName[who], offset, cdRam[offset & 0xFF], m68k_get_reg(NULL, M68K_REG_PC));
#endif
- return cdrom_ram[offset & 0xFF];
+ return cdRam[offset & 0xFF];
}
+static uint8 trackNum = 1, minTrack, maxTrack;
+//static uint8 minutes[16] = { 0, 0, 2, 5, 7, 10, 12, 15, 17, 20, 22, 25, 27, 30, 32, 35 };
+//static uint8 seconds[16] = { 0, 0, 30, 0, 30, 0, 30, 0, 30, 0, 30, 0, 30, 0, 30, 0 };
+//static uint8 frames[16] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
+//static uint16 sd = 0;
uint16 CDROMReadWord(uint32 offset, uint32 who/*=UNKNOWN*/)
{
offset &= 0xFF;
uint16 data = 0x0000;
- if (offset == 0x00)
+ if (offset == BUTCH)
data = 0x0000;
- else if (offset == 0x02)
- data = 0x2000;
- else if (offset == 0x0A)
+ else if (offset == BUTCH + 2)
+// We need to fix this so it's not as brain-dead as it is now--i.e., make it so that when
+// a command is sent to the CDROM, we control here whether or not it succeeded or whether
+// the command is still being carried out, etc.
+
+// bit12 - Command to CD drive pending (trans buffer empty if 1)
+// bit13 - Response from CD drive pending (rec buffer full if 1)
+// data = (haveCDGoodness ? 0x3000 : 0x0000); // DSA RX Interrupt pending bit (0 = pending)
+//This only returns ACKs for interrupts that are set:
+//This doesn't work for the initial code that writes $180000 to BUTCH. !!! FIX !!!
+ data = (haveCDGoodness ? cdRam[BUTCH + 3] << 8 : 0x0000);
+// else if (offset == SUBDATA + 2)
+// data = sd++ | 0x0010; // Have no idea what this is...
+ else if (offset == DS_DATA && haveCDGoodness)
{
- if (cdrom_cmd == 0x7001)
- data = cdrom_cmd;
+ if ((cdCmd & 0xFF00) == 0x0100) // ???
+ {
+//Not sure how to acknowledge the ???...
+// data = 0x0400;//?? 0x0200;
+ cdPtr++;
+ switch (cdPtr)
+ {
+ case 1:
+ data = 0x0000;
+ break;
+ case 2:
+ data = 0x0100;
+ break;
+ case 3:
+ data = 0x0200;
+ break;
+ case 4:
+ data = 0x0300;
+ break;
+ case 5:
+ data = 0x0400;
+ }//*/
+ WriteLog("CDROM: Reading DS_DATA (???), cdCmd=$%04X\n", cdCmd);
+ }
+ else if ((cdCmd & 0xFF00) == 0x0200) // Stop CD
+ {
+//Not sure how to acknowledge the stop...
+ data = 0x0400;//?? 0x0200;
+/* cdPtr++;
+ switch (cdPtr)
+ {
+ case 1:
+ data = 0x00FF;
+ break;
+ case 2:
+ data = 0x01FF;
+ break;
+ case 3:
+ data = 0x02FF;
+ break;
+ case 4:
+ data = 0x03FF;
+ break;
+ case 5:
+ data = 0x0400;
+ }//*/
+ WriteLog("CDROM: Reading DS_DATA (stop), cdCmd=$%04X\n", cdCmd);
+ }
+ else if ((cdCmd & 0xFF00) == 0x0300) // Read session TOC (overview?)
+ {
+
+/*
+TOC: [Sess] [adrCtl] [?] [point] [?] [?] [?] [?] [pmin] [psec] [pframe]
+TOC: 1 10 00 a0 00:00:00 00 01:00:00
+TOC: 1 10 00 a1 00:00:00 00 01:00:00
+TOC: 1 10 00 a2 00:00:00 00 03:42:42
+TOC: 1 10 00 1 00:00:00 00 00:02:00 <-- Track #1
+TOC: 1 50 00 b0 06:12:42 02 79:59:74
+TOC: 1 50 00 c0 128:00:32 00 97:18:06
+TOC: 2 10 00 a0 00:00:00 00 02:00:00
+TOC: 2 10 00 a1 00:00:00 00 11:00:00
+TOC: 2 10 00 a2 00:00:00 00 54:32:18
+TOC: 2 10 00 2 00:00:00 00 06:14:42 <-- Track #2
+TOC: 2 10 00 3 00:00:00 00 06:24:42 <-- Track #3
+TOC: 2 10 00 4 00:00:00 00 17:42:00 <-- Track #4
+TOC: 2 10 00 5 00:00:00 00 22:26:15 <-- Track #5
+TOC: 2 10 00 6 00:00:00 00 29:50:16 <-- Track #6
+TOC: 2 10 00 7 00:00:00 00 36:01:49 <-- Track #7
+TOC: 2 10 00 8 00:00:00 00 40:37:59 <-- Track #8
+TOC: 2 10 00 9 00:00:00 00 45:13:70 <-- Track #9
+TOC: 2 10 00 a 00:00:00 00 49:50:06 <-- Track #10
+TOC: 2 10 00 b 00:00:00 00 54:26:17 <-- Track #11
+*/
+
+//Should do something like so:
+// data = GetSessionInfo(cdCmd & 0xFF, cdPtr);
+ data = CDIntfGetSessionInfo(cdCmd & 0xFF, cdPtr);
+ if (data == 0xFF) // Failed...
+ {
+ data = 0x0400;
+ WriteLog("CDROM: Requested invalid session #%u (or failed to load TOC, or bad cdPtr value)\n", cdCmd & 0xFF);
+ }
+ else
+ {
+ data |= (0x20 | cdPtr++) << 8;
+ WriteLog("CDROM: Reading DS_DATA (session #%u TOC byte #%u): $%04X\n", cdCmd & 0xFF, cdPtr, data);
+ }
+
+/* bool isValidSession = ((cdCmd & 0xFF) == 0 ? true : false);//Hardcoded... !!! FIX !!!
+//NOTE: This should return error condition if the requested session doesn't exist! ($0400?)
+ if (isValidSession)
+ {
+ cdPtr++;
+ switch (cdPtr)
+ {
+ case 1:
+ data = 0x2001; // Min track for this session?
+ break;
+ case 2:
+ data = 0x210A; // Max track for this session?
+ break;
+ case 3:
+ data = 0x2219; // Max lead-out time, absolute minutes
+ break;
+ case 4:
+ data = 0x2319; // Max lead-out time, absolute seconds
+ break;
+ case 5:
+ data = 0x2419; // Max lead-out time, absolute frames
+ break;
+ default:
+ data = 0xFFFF;
+
+//; +0 - unused, reserved (0)
+//; +1 - unused, reserved (0)
+//; +2 - minimum track number
+//; +3 - maximum track number
+//; +4 - total number of sessions
+//; +5 - start of last lead-out time, absolute minutes
+//; +6 - start of last lead-out time, absolute seconds
+//; +7 - start of last lead-out time, absolute frames
+
+ }
+ WriteLog("CDROM: Reading DS_DATA (session #%u TOC byte #%u): $%04X\n", cdCmd & 0xFF, cdPtr, data);
+ }
+ else
+ {
+ data = 0x0400;
+ WriteLog("CDROM: Requested invalid session #%u\n", cdCmd & 0xFF);
+ }*/
+ }
+ // Seek to m, s, or f position
+ else if ((cdCmd & 0xFF00) == 0x1000 || (cdCmd & 0xFF00) == 0x1100 || (cdCmd & 0xFF00) == 0x1200)
+ data = 0x0100; // Success, though this doesn't take error handling into account.
+ // Ideally, we would also set the bits in BUTCH to let the processor know that
+ // this is ready to be read... !!! FIX !!!
+ else if ((cdCmd & 0xFF00) == 0x1400) // Read "full" session TOC
+ {
+//Need to be a bit more tricky here, since it's reading the "session" TOC instead of the
+//full TOC--so we need to check for the min/max tracks for each session here... [DONE]
+
+ if (trackNum > maxTrack)
+ {
+ data = 0x400;
+WriteLog("CDROM: Requested invalid track #%u for session #%u\n", trackNum, cdCmd & 0xFF);
+ }
+ else
+ {
+ if (cdPtr < 0x62)
+ data = (cdPtr << 8) | trackNum;
+ else if (cdPtr < 0x65)
+ data = (cdPtr << 8) | CDIntfGetTrackInfo(trackNum, (cdPtr - 2) & 0x0F);
+
+WriteLog("CDROM: Reading DS_DATA (session #%u, full TOC byte #%u): $%04X\n", cdCmd & 0xFF, (cdPtr+1) & 0x0F, data);
+
+ cdPtr++;
+ if (cdPtr == 0x65)
+ cdPtr = 0x60, trackNum++;
+ }
+
+ // Note that it seems to return track info in sets of 4 (or is it 5?)
+/*
+; +0 - track # (must be non-zero)
+; +1 - absolute minutes (0..99), start of track
+; +2 - absolute seconds (0..59), start of track
+; +3 - absolute frames, (0..74), start of track
+; +4 - session # (0..99)
+; +5 - track duration minutes
+; +6 - track duration seconds
+; +7 - track duration frames
+*/
+ // Seems to be the following format: $60xx -> Track #xx
+ // $61xx -> min? (trk?)
+ // $62xx -> sec? (min?)
+ // $63xx -> frame? (sec?)
+ // $64xx -> ? (frame?)
+/* cdPtr++;
+ switch (cdPtr)
+ {
+ case 1:
+ data = 0x6000 | trackNum; // Track #
+ break;
+ case 2:
+ data = 0x6100 | trackNum; // Track # (again?)
+ break;
+ case 3:
+ data = 0x6200 | minutes[trackNum]; // Minutes
+ break;
+ case 4:
+ data = 0x6300 | seconds[trackNum]; // Seconds
+ break;
+ case 5:
+ data = 0x6400 | frames[trackNum]; // Frames
+ trackNum++;
+ cdPtr = 0;
+ }//*/
+ }
+ else if ((cdCmd & 0xFF00) == 0x1500) // Read CD mode
+ {
+ data = cdCmd | 0x0200; // ?? not sure ?? [Seems OK]
+ WriteLog("CDROM: Reading DS_DATA (mode), cdCmd=$%04X\n", cdCmd);
+ }
+ else if ((cdCmd & 0xFF00) == 0x1800) // Spin up session #
+ {
+ data = cdCmd;
+ WriteLog("CDROM: Reading DS_DATA (spin up session), cdCmd=$%04X\n", cdCmd);
+ }
+ else if ((cdCmd & 0xFF00) == 0x5400) // Read # of sessions
+ {
+ data = cdCmd | 0x00; // !!! Hardcoded !!! FIX !!!
+ WriteLog("CDROM: Reading DS_DATA (# of sessions), cdCmd=$%04X\n", cdCmd);
+ }
+ else if ((cdCmd & 0xFF00) == 0x7000) // Read oversampling
+ {
+//NOTE: This setting will probably affect the # of DSP interrupts that need to happen. !!! FIX !!!
+ data = cdCmd;
+ WriteLog("CDROM: Reading DS_DATA (oversampling), cdCmd=$%04X\n", cdCmd);
+ }
else
+ {
data = 0x0400;
+ WriteLog("CDROM: Reading DS_DATA, unhandled cdCmd=$%04X\n", cdCmd);
+ }
+ }
+ else if (offset == DS_DATA && !haveCDGoodness)
+ data = 0x0400; // No CD interface present, so return error
+ else if (offset >= FIFO_DATA && offset <= FIFO_DATA + 3)
+ {
+ }
+ else if (offset >= FIFO_DATA + 4 && offset <= FIFO_DATA + 7)
+ {
}
else
- data = (cdrom_ram[offset+0] << 8) | cdrom_ram[offset+1];
+ data = GET16(cdRam, offset);
//Returning $00000008 seems to cause it to use the starfield. Dunno why.
+// It looks like it's getting the CD_mode this way...
//Temp, for testing...
//Very interesting...! Seems to control sumthin' or other...
/*if (offset == 0x2C || offset == 0x2E)
data = 0xFFFF;//*/
-if (offset == 0x2C)
+/*if (offset == 0x2C)
data = 0x0000;
if (offset == 0x2E)
- data = 0x0008;//*/ // $0000 000F ($B) works, but not $0000 00001... or $7
+ data = 0;//0x0008;//*/
+ if (offset == UNKNOWN + 2)
+ data = CDROMBusRead();
#ifdef CDROM_LOG
if ((offset & 0xFF) < 11 * 4)
WriteLog("[%s] ", BReg[(offset & 0xFF) / 4]);
- WriteLog("CDROM: %s reading word $%04X from $%08X [68K PC=$%08X]\n", whoName[who], data, offset, m68k_get_reg(NULL, M68K_REG_PC));
+ if (offset != UNKNOWN && offset != UNKNOWN + 2)
+ WriteLog("CDROM: %s reading word $%04X from $%08X [68K PC=$%08X]\n", whoName[who], data, offset, m68k_get_reg(NULL, M68K_REG_PC));
#endif
return data;
}
void CDROMWriteByte(uint32 offset, uint8 data, uint32 who/*=UNKNOWN*/)
{
offset &= 0xFF;
- cdrom_ram[offset] = data;
+ cdRam[offset] = data;
#ifdef CDROM_LOG
- if ((offset & 0xFF) < 11 * 4)
+ if ((offset & 0xFF) < 12 * 4)
WriteLog("[%s] ", BReg[(offset & 0xFF) / 4]);
WriteLog("CDROM: %s writing byte $%02X at $%08X [68K PC=$%08X]\n", whoName[who], data, offset, m68k_get_reg(NULL, M68K_REG_PC));
#endif
void CDROMWriteWord(uint32 offset, uint16 data, uint32 who/*=UNKNOWN*/)
{
offset &= 0xFF;
- cdrom_ram[offset+0] = (data >> 8) & 0xFF;
- cdrom_ram[offset+1] = data & 0xFF;
-
- // command register
-/*
- if (offset==0x0A)
+ SET16(cdRam, offset, data);
+
+ // Command register
+//Lesse what this does... Seems to work OK...!
+ if (offset == DS_DATA)
{
- cdrom_cmd=data;
- if ((data&0xff00)==0x1500)
+ cdCmd = data;
+ if ((data & 0xFF00) == 0x0200) // Stop CD
{
- WriteLog("CDROM: setting mode 0x%.2x\n",data&0xff);
- return;
+ cdPtr = 0;
+ WriteLog("CDROM: Stopping CD\n", data & 0xFF);
}
- if (data==0x7001)
+ else if ((data & 0xFF00) == 0x0300) // Read session TOC (short? overview?)
{
- uint32 offset=cdrom_ram[0x00];
- offset<<=8;
- offset|=cdrom_ram[0x01];
- offset<<=8;
- offset|=cdrom_ram[0x02];
- offset<<=8;
- offset|=cdrom_ram[0x03];
-
- uint32 size=cdrom_ram[0x04];
- offset<<=8;
- offset|=cdrom_ram[0x05];
-
- WriteLog("CDROM: READ(0x%.8x, 0x%.4x) [68k pc=0x%.8x]\n", offset, size, m68k_get_reg(NULL, M68K_REG_PC));
- return;
+ cdPtr = 0;
+ WriteLog("CDROM: Reading TOC for session #%u\n", data & 0xFF);
+ }
+//Not sure how these three acknowledge...
+ else if ((data & 0xFF00) == 0x1000) // Seek to minute position
+ {
+ min = data & 0x00FF;
+ }
+ else if ((data & 0xFF00) == 0x1100) // Seek to second position
+ {
+ sec = data & 0x00FF;
+ }
+ else if ((data & 0xFF00) == 0x1200) // Seek to frame position
+ {
+ frm = data & 0x00FF;
+ block = (((min * 60) + sec) * 75) + frm;
+ cdBufPtr = 2352; // Ensure that SSI read will do so immediately
+ WriteLog("CDROM: Seeking to %u:%02u:%02u [block #%u]\n", min, sec, frm, block);
+ }
+ else if ((data & 0xFF00) == 0x1400) // Read "full" TOC for session
+ {
+ cdPtr = 0x60,
+ minTrack = CDIntfGetSessionInfo(data & 0xFF, 0),
+ maxTrack = CDIntfGetSessionInfo(data & 0xFF, 1);
+ trackNum = minTrack;
+ WriteLog("CDROM: Reading \"full\" TOC for session #%u (min=%u, max=%u)\n", data & 0xFF, minTrack, maxTrack);
+ }
+ else if ((data & 0xFF00) == 0x1500) // Set CDROM mode
+ {
+ // Mode setting is as follows: bit 0 set -> single speed, bit 1 set -> double,
+ // bit 3 set -> multisession CD, bit 3 unset -> audio CD
+ WriteLog("CDROM: Setting mode $%02X\n", data & 0xFF);
+ }
+ else if ((data & 0xFF00) == 0x1800) // Spin up session #
+ {
+ WriteLog("CDROM: Spinning up session #%u\n", data & 0xFF);
+ }
+ else if ((data & 0xFF00) == 0x5400) // Read # of sessions
+ {
+ WriteLog("CDROM: Reading # of sessions\n", data & 0xFF);
+ }
+ else if ((data & 0xFF00) == 0x7000) // Set oversampling rate
+ {
+ // 1 = none, 2 = 2x, 3 = 4x, 4 = 8x
+ uint32 rates[5] = { 0, 1, 2, 4, 8 };
+ WriteLog("CDROM: Setting oversample rate to %uX\n", rates[(data & 0xFF)]);
}
else
- WriteLog("CDROM: unknown command 0x%.4x\n",data);
- }
-//*/
+ WriteLog("CDROM: Unknown command $%04X\n", data);
+ }//*/
+
+ if (offset == UNKNOWN + 2)
+ CDROMBusWrite(data);
+
#ifdef CDROM_LOG
if ((offset & 0xFF) < 11 * 4)
WriteLog("[%s] ", BReg[(offset & 0xFF) / 4]);
- WriteLog("CDROM: %s writing word $%04X at $%08X [68K PC=$%08X]\n", whoName[who], data, offset, m68k_get_reg(NULL, M68K_REG_PC));
+ if (offset != UNKNOWN && offset != UNKNOWN + 2)
+ WriteLog("CDROM: %s writing word $%04X at $%08X [68K PC=$%08X]\n", whoName[who], data, offset, m68k_get_reg(NULL, M68K_REG_PC));
+#endif
+}
+
+//
+// State machine for sending/receiving data along a serial bus
+//
+
+enum ButchState { ST_INIT, ST_RISING, ST_FALLING };
+static ButchState currentState = ST_INIT;
+static uint16 counter = 0;
+static bool cmdTx = false;
+static uint16 busCmd;
+static uint16 rxData, txData;
+static uint16 rxDataBit;
+static bool firstTime = false;
+
+static void CDROMBusWrite(uint16 data)
+{
+//This is kinda lame. What we should do is check for a 0->1 transition on either bits 0 or 1...
+//!!! FIX !!!
+
+#ifdef CDROM_LOG
+ if (data & 0xFFF0)
+ WriteLog("CDROM: BusWrite write on unknown line: $%04X\n", data);
+#endif
+
+ switch (currentState)
+ {
+ case ST_INIT:
+ currentState = ST_RISING;
+ break;
+ case ST_RISING:
+ if (data & 0x0001) // Command coming
+ {
+ cmdTx = true;
+ counter = 0;
+ busCmd = 0;
+ }
+ else
+ {
+ if (cmdTx)
+ {
+ busCmd <<= 1; // Make room for next bit
+ busCmd |= (data & 0x04); // & put it in
+ counter++;
+
+ if (counter == 9)
+ {
+ busCmd >>= 2; // Because we ORed bit 2, we need to shift right by 2
+ cmdTx = false;
+
+//What it looks like:
+//It seems that the $18x series reads from NVRAM while the
+//$130, $14x, $100 series writes values to NVRAM...
+ if (busCmd == 0x180)
+ rxData = 0x0024;//1234;
+ else if (busCmd == 0x181)
+ rxData = 0x0004;//5678;
+ else if (busCmd == 0x182)
+ rxData = 0x0071;//9ABC;
+ else if (busCmd == 0x183)
+ rxData = 0xFF67;//DEF0;
+ else if (busCmd == 0x184)
+ rxData = 0xFFFF;//892F;
+ else if (busCmd == 0x185)
+ rxData = 0xFFFF;//8000;
+ else
+ rxData = 0x0001;
+// rxData = 0x8349;//8000;//0F67;
+
+ counter = 0;
+ firstTime = true;
+ txData = 0;
+#ifdef CDROM_LOG
+ WriteLog("CDROM: *** BusWrite got command $%04X\n", busCmd);
+#endif
+ }
+ }
+ else
+ {
+ txData = (txData << 1) | ((data & 0x04) >> 2);
+//WriteLog("[%s]", data & 0x04 ? "1" : "0");
+
+ rxDataBit = (rxData & 0x8000) >> 12;
+ rxData <<= 1;
+ counter++;
+#ifdef CDROM_LOG
+ if (counter == 16)
+ WriteLog("CDROM: *** BusWrite got extra command $%04X\n", txData);
+#endif
+ }
+ }
+
+ currentState = ST_FALLING;
+ break;
+ case ST_FALLING:
+ currentState = ST_INIT;
+ break;
+ }
+}
+
+static uint16 CDROMBusRead(void)
+{
+// It seems the counter == 0 simply waits for a single bit acknowledge-- !!! FIX !!!
+// Or does it? Hmm. It still "pumps" 16 bits through above, so how is this special?
+// Seems to be because it sits and looks at it as if it will change. Dunno!
+#ifdef CDROM_LOG
+ if ((counter & 0x0F) == 0)
+ {
+ if (counter == 0 && rxDataBit == 0)
+ {
+ if (firstTime)
+ {
+ firstTime = false;
+ WriteLog("0...\n");
+ }
+ }
+ else
+ WriteLog("%s\n", rxDataBit ? "1" : "0");
+ }
+ else
+ WriteLog("%s", rxDataBit ? "1" : "0");
#endif
+
+ return rxDataBit;
+}
+
+//
+// This simulates a read from BUTCH over the SSI to JERRY. Uses real reading!
+//
+//temp, until I can fix my CD image... Argh!
+static uint8 cdBuf2[2532 + 96], cdBuf3[2532 + 96];
+uint16 GetWordFromButchSSI(uint32 offset, uint32 who/*= UNKNOWN*/)
+{
+ bool go = ((offset & 0x0F) == 0x0A || (offset & 0x0F) == 0x0E ? true : false);
+
+ if (!go)
+ return 0x000;
+
+// The problem comes in here. Really, we should generate the IRQ once we've stuffed
+// our values into the DAC L/RRXD ports...
+// But then again, the whole IRQ system needs an overhaul in order to make it more
+// cycle accurate WRT to the various CPUs. Right now, it's catch-as-catch-can, which
+// means that IRQs get serviced on scanline boundaries instead of when they occur.
+ cdBufPtr += 2;
+
+ if (cdBufPtr >= 2352)
+ {
+WriteLog("CDROM: %s reading block #%u...\n", whoName[who], block);
+ //No error checking. !!! FIX !!!
+//NOTE: We have to subtract out the 1st track start as well (in cdintf_foo.cpp)!
+// CDIntfReadBlock(block - 150, cdBuf);
+
+//Crappy kludge for shitty shit. Lesse if it works!
+ CDIntfReadBlock(block - 150, cdBuf2);
+ CDIntfReadBlock(block - 149, cdBuf3);
+ for(int i=0; i<2352-4; i+=4)
+ {
+ cdBuf[i+0] = cdBuf2[i+4];
+ cdBuf[i+1] = cdBuf2[i+5];
+ cdBuf[i+2] = cdBuf2[i+2];
+ cdBuf[i+3] = cdBuf2[i+3];
+ }
+ cdBuf[2348] = cdBuf3[0];
+ cdBuf[2349] = cdBuf3[1];
+ cdBuf[2350] = cdBuf2[2350];
+ cdBuf[2351] = cdBuf2[2351];//*/
+
+ block++, cdBufPtr = 0;
+ }
+
+/*extern bool doDSPDis;
+if (block == 244968)
+ doDSPDis = true;//*/
+
+WriteLog("[%04X:%01X]", GET16(cdBuf, cdBufPtr), offset & 0x0F);
+if (cdBufPtr % 32 == 30)
+ WriteLog("\n");
+
+// return GET16(cdBuf, cdBufPtr);
+//This probably isn't endian safe...
+// But then again... It seems that even though the data on the CD is organized as
+// LL LH RL RH the way it expects to see the data is RH RL LH LL.
+// D'oh! It doesn't matter *how* the data comes in, since it puts each sample into
+// its own left or right side queue, i.e. it reads them 32 bits at a time and puts
+// them into their L/R channel queues. It does seem, though, that it expects the
+// right channel to be the upper 16 bits and the left to be the lower 16.
+ return (cdBuf[cdBufPtr + 1] << 8) | cdBuf[cdBufPtr + 0];
}
+
+bool ButchIsReadyToSend(void)
+{
+ return (cdRam[I2CNTRL + 3] & 0x02 ? true : false);
+}
+
+//
+// This simulates a read from BUTCH over the SSI to JERRY. Uses real reading!
+//
+void SetSSIWordsXmittedFromButch(void)
+{
+
+// The problem comes in here. Really, we should generate the IRQ once we've stuffed
+// our values into the DAC L/RRXD ports...
+// But then again, the whole IRQ system needs an overhaul in order to make it more
+// cycle accurate WRT to the various CPUs. Right now, it's catch-as-catch-can, which
+// means that IRQs get serviced on scanline boundaries instead of when they occur.
+
+// NOTE: The CD BIOS uses the following SMODE:
+// DAC: M68K writing to SMODE. Bits: WSEN FALLING [68K PC=00050D8C]
+ cdBufPtr += 4;
+
+ if (cdBufPtr >= 2352)
+ {
+WriteLog("CDROM: Reading block #%u...\n", block);
+ //No error checking. !!! FIX !!!
+//NOTE: We have to subtract out the 1st track start as well (in cdintf_foo.cpp)!
+// CDIntfReadBlock(block - 150, cdBuf);
+
+//Crappy kludge for shitty shit. Lesse if it works!
+//It does! That means my CD is WRONG! FUCK!
+
+// But, then again, according to Belboz at AA the two zeroes in front *ARE* necessary...
+// So that means my CD is OK, just this method is wrong!
+// It all depends on whether or not the interrupt occurs on the RISING or FALLING edge
+// of the word strobe... !!! FIX !!!
+
+// When WS rises, left channel was done transmitting. When WS falls, right channel is done.
+// CDIntfReadBlock(block - 150, cdBuf2);
+// CDIntfReadBlock(block - 149, cdBuf3);
+ CDIntfReadBlock(block, cdBuf2);
+ CDIntfReadBlock(block + 1, cdBuf3);
+ memcpy(cdBuf, cdBuf2 + 2, 2350);
+ cdBuf[2350] = cdBuf3[0];
+ cdBuf[2351] = cdBuf3[1];//*/
+
+ block++, cdBufPtr = 0;
+
+/*extern bool doDSPDis;
+static int foo = 0;
+if (block == 244968)
+{
+ foo++;
+WriteLog("\n***** foo = %u, block = %u *****\n\n", foo, block);
+ if (foo == 2)
+ doDSPDis = true;
+}//*/
+ }
+
+
+WriteLog("[%02X%02X %02X%02X]", cdBuf[cdBufPtr+1], cdBuf[cdBufPtr+0], cdBuf[cdBufPtr+3], cdBuf[cdBufPtr+2]);
+if (cdBufPtr % 32 == 28)
+ WriteLog("\n");
+
+//This probably isn't endian safe...
+// But then again... It seems that even though the data on the CD is organized as
+// LL LH RL RH the way it expects to see the data is RH RL LH LL.
+// D'oh! It doesn't matter *how* the data comes in, since it puts each sample into
+// its own left or right side queue, i.e. it reads them 32 bits at a time and puts
+// them into their L/R channel queues. It does seem, though, that it expects the
+// right channel to be the upper 16 bits and the left to be the lower 16.
+
+// This behavior is strictly a function of *where* the WS creates an IRQ. If the data
+// is shifted by two zeroes (00 00 in front of the data file) then this *is* the
+// correct behavior, since the left channel will be xmitted followed by the right
+
+// Now we have definitive proof: The MYST CD shows a word offset. So that means we have
+// to figure out how to make that work here *without* having to load 2 sectors, offset, etc.
+// !!! FIX !!!
+ lrxd = (cdBuf[cdBufPtr + 3] << 8) | cdBuf[cdBufPtr + 2],
+ rrxd = (cdBuf[cdBufPtr + 1] << 8) | cdBuf[cdBufPtr + 0];
+}
+
+/*
+[18667]
+TOC for MYST
+
+CDINTF: Disc summary
+ # of sessions: 2, # of tracks: 10
+ Session info:
+ 1: min track= 1, max track= 1, lead out= 1:36:67
+ 2: min track= 2, max track=10, lead out=55:24:71
+ Track info:
+ 1: start= 0:02:00
+ 2: start= 4:08:67
+ 3: start= 4:16:65
+ 4: start= 4:29:19
+ 5: start=29:31:03
+ 6: start=33:38:50
+ 7: start=41:38:60
+ 8: start=44:52:18
+ 9: start=51:51:22
+ 10: start=55:18:73
+
+CDROM: Read sector 18517 (18667 - 150)...
+
+0000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0018: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0048: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0078: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0090: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00A8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00C0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00D8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+00F0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0108: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0120: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0138: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0150: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0168: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0198: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+01B0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+01C8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+01E0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+01F8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0210: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0228: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0240: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0258: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0270: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0288: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+02A0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+02B8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+02D0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+02E8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0300: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0318: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0330: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0348: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0360: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0378: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0390: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+03A8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+03C0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+03D8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+03F0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0408: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0420: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0438: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0450: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0468: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0480: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0498: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+04B0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+04C8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+04E0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+04F8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0510: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0528: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0540: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0558: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0570: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0588: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+05A0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+05B8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+05D0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+05E8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0618: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0630: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0648: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0660: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0678: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0690: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+06A8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+06C0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+06D8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+06F0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0708: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0720: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0738: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0750: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0768: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+0798: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+07B0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
+07C8: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00[54 41 49 52]54 41
+07E0: 49 52 54 41 49 52 54 41 49 52 54 41 49 52 54 41 49 52 54 41 49 52 54 41
+07F8: 49 52 54 41 49 52 54 41 49 52 54 41 49 52 54 41 49 52 54 41 49 52 54 41
+0810: 49 52 54 41 49 52[54 41 49 52]54 41 52 41 20 49 50 41 52 50 56 4F 44 45
+0828: 44 20 54 41 20 41 45 48 44 41 52 45 41 20 52 54 20 49[00 00 00 50]01 00
+0840: 80 83 FC 23 07 00 07 00 F0 00 0C 21 FC 23 07 00 07 00 F1 00 0C A1 FC 33
+0858: FF FF F0 00 4E 00 7C 2E 1F 00 FC FF 00 61 08 00 F9 4E 00 00 00 51 E7 48
+0870: 00 FE 39 30 F1 00 02 40 40 02 10 00 00 67 1C 00 79 42 01 00 8C D3 3C 34
+0888: 37 03 3C 30 81 05 3C 3C 0A 01 3C 38 F1 00 00 60 1A 00 FC 33 01 00 01 00
+08A0: 8C D3 3C 34 4B 03 3C 30 65 05 3C 3C 42 01 3C 38 1F 01 C0 33 01 00 88 D3
+08B8: C4 33 01 00 8A D3 00 32 41 E2 41 94 7C D4 04 00 7C 92 01 00 41 00 00 04
+08D0: C1 33 01 00 82 D3 C1 33 F0 00 3C 00 C2 33 01 00 80 D3 C2 33 F0 00 38 00
+08E8: C2 33 F0 00 3A 00 06 3A 44 9A C5 33 01 00 84 D3 44 DC C6 33 01 00 86 D3
+0900: F9 33 01 00 84 D3 F0 00 46 00 FC 33 FF FF F0 00 48 00 FC 23 00 00 00 00
+0918: F0 00 2A 00 FC 33 00 00 F0 00 58 00 DF 4C 7F 00 75 4E 00 00 00 00 00 00
+
+Raw P-W subchannel data:
+
+00: 80 80 C0 80 80 80 80 C0 80 80 80 80 80 80 C0 80
+10: 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80
+20: 80 80 80 80 80 80 80 80 80 80 80 80 80 80 80 C0
+30: 80 80 80 80 80 80 80 80 80 80 80 80 80 C0 80 80
+40: 80 80 80 80 C0 80 80 80 80 C0 C0 80 80 C0 C0 80
+50: C0 80 80 C0 C0 C0 80 80 C0 80 80 80 C0 80 80 80
+
+P subchannel data: FF FF FF FF FF FF FF FF FF FF FF FF
+Q subchannel data: 21 02 00 00 00 01 00 04 08 66 9C 88
+
+Run address: $5000, Length: $18380
+*/
+
+
+/*
+CD_read function from the CD BIOS: Note that it seems to direct the EXT1 interrupt
+to the GPU--so that would mean *any* interrupt that BUTCH generates would be routed
+to the GPU...
+
+read:
+ btst.l #31,d0
+ bne.w .play
+ subq.l #4,a0 ; Make up for ISR pre-increment
+ move.l d0,-(sp)
+ move.l BUTCH,d0
+ and.l #$ffff0000,d0
+ move.l d0,BUTCH ; NO INTERRUPTS!!!!!!!!!!!
+ move.l (sp)+,d0
+; move.l #0,BUTCH
+
+ move.w #$101,J_INT
+
+ move.l d1,-(sp)
+ move.l I2CNTRL,d1 ;Read I2S Control Register
+ bclr #2,d1 ; Stop data
+ move.l d1,I2CNTRL
+ move.l (sp)+,d1
+
+ move.l PTRLOC,a2
+ move.l a0,(a2)+
+ move.l a1,(a2)+
+ move.l #0,(a2)+
+
+ btst.b #7,INITTYPE
+ beq .not_bad
+ move.l PTRLOC,a0
+ asl.l #5,d2
+
+ move.l d2,-(sp)
+
+ or.l #$089a3c1a,d2 ; These instructions include the bclr
+ move.l d2,188(a0)
+
+ move.l (sp)+,d2
+
+ swap d2
+ or.l #$3c1a1838,d2 ; These instructions include the bclr
+ move.l d2,196(a0)
+
+ move.l #16,(a2)+
+ move.l d1,(a2)
+
+.not_bad:
+
+ move.w DS_DATA,d1 ; Clear any pending DSARX states
+ move.l I2CNTRL,d1 ; Clear any pending errors
+
+; Drain the FIFO so that we don't get overloaded
+
+.dump:
+ move.l FIFO_DATA,d1
+ move.l I2CNTRL,d1
+ btst #4,d1
+ bne.b .dump
+
+.butch_go:
+ move.l BUTCH,d1
+ and.l #$FFFF0000,d1
+ or.l #%000100001,d1 ;Enable DSARX interrupt
+ move.l d1,BUTCH
+; move.l #%000100001,BUTCH ;Enable DSARX interrupt
+
+; Do a play @
+
+.play: move.l d0,d1 ; mess with copy in d1
+ lsr.l #8,d1 ; shift the byte over
+ lsr.w #8,d1
+ or.w #$1000,d1 ; format it for goto
+ move.w d1,DS_DATA ; DSA tx
+ bsr.b DSA_tx
+
+ move.l d0,d1 ; mess with copy in d1
+ lsr.w #8,d1
+ or.w #$1100,d1 ; format it for goto
+ move.w d1,DS_DATA ; DSA tx
+ bsr.b DSA_tx
+
+ move.l d0,d1 ; mess with copy in d1
+ and.w #$00FF,d1 ; mask for minutes
+ or.w #$1200,d1 ; format it for goto
+ move.w d1,DS_DATA ; DSA tx
+ bsr.b DSA_tx
+
+ rts
+
+
+****************************
+* Here's the GPU interrupt *
+****************************
+
+JERRY_ISR:
+ movei #G_FLAGS,r30
+ load (r30),r29 ;read the flags
+
+ movei #BUTCH,r24
+
+make_ptr:
+ move pc,Ptrloc
+ movei #(make_ptr-PTRPOS),TEMP
+ sub TEMP,Ptrloc
+
+HERE:
+ move pc,r25
+ movei #(EXIT_ISR-HERE),r27
+ add r27,r25
+
+; Is this a DSARX interrupt?
+
+ load (r24),r27 ;check for DSARX int pending
+ btst #13,r27
+ jr z,fifo_read ; This should ALWAYS fall thru the first time
+
+; Set the match bit, to allow data
+; moveq #3,r26 ; enable FIFO only
+; Don't just jam a value
+; Clear the DSARX and set FIFO
+ bclr #5,r27
+ bset #1,r27
+ store r27,(r24)
+ addq #$10,r24
+ load (r24),r27
+ bset #2,r27
+ store r27,(r24) ; Disable SUBCODE match
+
+; Now we clear the DSARX interrupt in Butch
+
+ subq #12,r24 ; does what the above says
+ load (r24),r26 ;Clears DSA pending interrupt
+ addq #6,r24
+ loadw (r24),r27 ; Read DSA response
+ btst #10,r27 ; Check for error
+ jr nz,error
+ or r26,r26
+ jump (r25)
+; nop
+
+fifo_read:
+; Check for ERROR!!!!!!!!!!!!!!!!!!!!!
+ btst #14,r27
+ jr z,noerror
+ bset #31,r27
+error:
+ addq #$10,r24
+ load (r24),TEMP
+ or TEMP,TEMP
+ subq #$10,r24
+ load (Ptrloc),TEMP
+ addq #8,Ptrloc
+ store TEMP,(Ptrloc)
+ subq #8,Ptrloc
+noerror:
+ load (Ptrloc),Dataptr ;get pointer
+
+; Check to see if we should stop
+ addq #4,Ptrloc
+ load (Ptrloc),TEMP
+ subq #4,Ptrloc
+ cmp Dataptr,TEMP
+ jr pl,notend
+; nop
+ bclr #0,r27
+ store r27,(r24)
+
+notend:
+ movei #FIFO_DATA,CDdata
+ move CDdata,r25
+ addq #4,CDdata
+loptop:
+ load (CDdata),TEMP
+ load (r25),r30
+ load (CDdata),r21
+ load (r25),r22
+ load (CDdata),r24
+ load (r25),r20
+ load (CDdata),r19
+ load (r25),r18
+ addq #4,Dataptr
+ store TEMP,(Dataptr)
+ addqt #4,Dataptr
+ store r30,(Dataptr)
+ addqt #4,Dataptr
+ store r21,(Dataptr)
+ addqt #4,Dataptr
+ store r22,(Dataptr)
+ addqt #4,Dataptr
+ store r24,(Dataptr)
+ addqt #4,Dataptr
+ store r20,(Dataptr)
+ addqt #4,Dataptr
+ store r19,(Dataptr)
+ addqt #4,Dataptr
+ store r18,(Dataptr)
+
+ store Dataptr,(Ptrloc)
+
+exit_isr:
+ movei #J_INT,r24 ; Acknowledge in Jerry
+ moveq #1,TEMP
+ bset #8,TEMP
+ storew TEMP,(r24)
+
+.if FLAG
+; Stack r18
+ load (r31),r18
+ addq #4,r31
+
+; Stack r19
+ load (r31),r19
+ addq #4,r31
+
+; Stack r20
+ load (r31),r20
+ addq #4,r31
+
+; Stack r21
+ load (r31),r21
+ addq #4,r31
+
+; Stack r22
+ load (r31),r22
+ addq #4,r31
+
+; Stack r23
+ load (r31),r23
+ addq #4,r31
+
+; Stack r26
+ load (r31),r26
+ addq #4,r31
+
+; Stack r27
+ load (r31),r27
+ addq #4,r31
+
+; Stack r24
+ load (r31),r24
+ addq #4,r31
+
+; Stack r25
+ load (r31),r25
+ addq #4,r31
+.endif
+
+ movei #G_FLAGS,r30
+
+;r29 already has flags
+ bclr #3,r29 ;IMASK
+ bset #10,r29 ;Clear DSP int bit in TOM
+
+ load (r31),r28 ;Load return address
+
+
+ addq #2,r28 ;Fix it up
+ addq #4,r31
+ jump (r28) ;Return
+ store r29,(r30) ;Restore broken flags
+
+
+ align long
+
+stackbot:
+ ds.l 20
+STACK:
+
+
+*/
+
projects / virtualjaguar / commitdiff