// WHO WHEN WHAT
// --- ---------- ------------------------------------------------------------
// JLH 11/12/2005 Initial port to SDL
-// JLH 11/18/2005 Wired up graphic soft switches
+// JLH 11/18/2005 Wired up graphic soft switches
// JLH 12/02/2005 Setup timer subsystem for more accurate time keeping
// JLH 12/12/2005 Added preliminary state saving support
//
#include "gui/draggablewindow2.h"
#include "gui/textedit.h"
-using namespace std;
+//using namespace std;
// Global variables
}
else if ((addr & 0xFFF0) == 0xC030)
{
+/*
+This is problematic, mainly because the v65C02 removes actual cycles run after each call.
+Therefore, we don't really have a reliable method of sending a timestamp to the sound routine.
+How to fix?
+
+What we need to send is a delta T value but related to the IRQ buffer routine. E.g., if the buffer
+hasn't had any changes in it then we just fill it with the last sample value and are done. Then
+we need to adjust our delta T accordingly. What we could do is keep a running total of time since the
+last change and adjust it accordingly, i.e., whenever a sound IRQ happens.
+How to keep track?
+
+Have deltaT somewhere. Then, whenever there's a toggle, backfill buffer with last spkr state and reset
+deltaT to zero. In the sound IRQ, if deltaT > buffer size, then subtract buffer size from deltaT. (?)
+
+
+
+*/
ToggleSpeaker(GetCurrentV65C02Clock());
//should it return something else here???
return 0x00;
//OK! This switch selects bank 2 of the 4K bank at $D000-$DFFF. One access makes it
//visible, two makes it R/W.
+/*
+301 LDA $E000
+304 PHA
+305 LDA $C081
+308 PLA
+309 PHA
+30A CMP $E000
+30D BNE $332
+30F LDA $C083
+312 LDA $C083
+315 LDA #$A5
+317 STA $D000
+31A CMP $D000
+31D BNE $332
+31F LSR A
+320 STA $D000
+323 CMP $D000
+326 BNE $332
+328 LDA $C081
+32B LDA $C081
+32E LDA #$01
+330 BNE $334
+332 LDA #$00
+334 STA $300
+337 PLA
+338 CMP $E000
+33B BEQ $340
+33D LDA $C080
+340 RTS
+
+A = PEEK($C082)
+*/
+
+#define DEBUG_LC
else if ((addr & 0xFFFB) == 0xC080)
{
+#ifdef DEBUG_LC
+WriteLog("LC(R): $C080 49280 OECG R Read RAM bank 2; no write\n");
+#endif
//$C080 49280 OECG R Read RAM bank 2; no write
visibleBank = LC_BANK_2;
readRAM = true;
}
else if ((addr & 0xFFFB) == 0xC081)
{
+#ifdef DEBUG_LC
+WriteLog("LC(R): $C081 49281 OECG RR Read ROM; write RAM bank 2\n");
+#endif
//$C081 49281 ROMIN OECG RR Read ROM; write RAM bank 2
visibleBank = LC_BANK_2;
readRAM = false;
}
else if ((addr & 0xFFFB) == 0xC082)
{
+#ifdef DEBUG_LC
+WriteLog("LC(R): $C082 49282 OECG R Read ROM; no write\n");
+#endif
//$C082 49282 OECG R Read ROM; no write
visibleBank = LC_BANK_2;
readRAM = false;
}
else if ((addr & 0xFFFB) == 0xC083)
{
+#ifdef DEBUG_LC
+WriteLog("LC(R): $C083 49283 OECG RR Read/Write RAM bank 2\n");
+#endif
//$C083 49283 LCBANK2 OECG RR Read/write RAM bank 2
visibleBank = LC_BANK_2;
readRAM = true;
}
else if ((addr & 0xFFFB) == 0xC088)
{
+#ifdef DEBUG_LC
+WriteLog("LC(R): $%04X 49288 OECG R Read RAM bank 1; no write\n", addr);
+#endif
//$C088 49288 OECG R Read RAM bank 1; no write
visibleBank = LC_BANK_1;
readRAM = true;
writeRAM = false;
+//Hm. Some stuff seems to want this.
+//nope, was looking at $C0E8... return 0xFF;
}
else if ((addr & 0xFFFB) == 0xC089)
{
+#ifdef DEBUG_LC
+WriteLog("LC(R): $C089 49289 OECG RR Read ROM; write RAM bank 1\n");
+#endif
//$C089 49289 OECG RR Read ROM; write RAM bank 1
visibleBank = LC_BANK_1;
readRAM = false;
}
else if ((addr & 0xFFFB) == 0xC08A)
{
+#ifdef DEBUG_LC
+WriteLog("LC(R): $C08A 49290 OECG R Read ROM; no write\n");
+#endif
//$C08A 49290 OECG R Read ROM; no write
visibleBank = LC_BANK_1;
readRAM = false;
}
else if ((addr & 0xFFFB) == 0xC08B)
{
+#ifdef DEBUG_LC
+WriteLog("LC(R): $C08B 49291 OECG RR Read/Write RAM bank 1\n");
+#endif
//$C08B 49291 OECG RR Read/write RAM bank 1
visibleBank = LC_BANK_1;
readRAM = true;
else if (addr == 0xC0EC)
{
return floppyDrive.ReadWrite();
+//Hm, some stuff is looking at the return value. Dunno what it *should* be...
+// OK, it's from the ReadWrite routine...
+//return 0xFF;
}
else if (addr == 0xC0ED)
{
A-9 (Mockingboard)
APPENDIX F Assembly Language Program Listings
- 1 *PRIMARY ROUTINES
- 2 *FOR SLOT 4
- 3 *
- 4 ORG $9000
- 5 * ;ADDRESSES
- FOR FIRST
- 6522
- 6 ORB EQU $C400 ;PORT B
- 7 ORA EQU $C401 ;PORT A
- 8 DDRB EQU $C402 ;DATA DIRECTION
- REGISTER (A)
- 9 DDRA EQU $C403 ;DATA DIRECTION
- REGISTER (B)
- 10 * ;ADDRESSES
- FOR SECOND
- 6522
- 11 ORB2 EQU $C480 ;PORT B
- 12 ORA2 EQU $C481 ;PORT A
- 13 DDRB2 EQU $C482 ;DATA DIRECTION
- REGISTER (B)
- 14 DDRA2 EQU $C483 ;DATA DIRECTION
- REGISTER (A)
+ 1 *PRIMARY ROUTINES
+ 2 *FOR SLOT 4
+ 3 *
+ 4 ORG $9000
+ 5 * ;ADDRESSES FOR FIRST 6522
+ 6 ORB EQU $C400 ;PORT B
+ 7 ORA EQU $C401 ;PORT A
+ 8 DDRB EQU $C402 ;DATA DIRECTION REGISTER (A)
+ 9 DDRA EQU $C403 ;DATA DIRECTION REGISTER (B)
+ 10 * ;ADDRESSES FOR SECOND 6522
+ 11 ORB2 EQU $C480 ;PORT B
+ 12 ORA2 EQU $C481 ;PORT A
+ 13 DDRB2 EQU $C482 ;DATA DIRECTION REGISTER (B)
+ 14 DDRA2 EQU $C483 ;DATA DIRECTION REGISTER (A)
*/
void WrMem(uint16 addr, uint8 b)
{
}
else if ((addr & 0xFFF0) == 0xC010) // Keyboard strobe
{
- keyDown = false;
+//Actually, according to the A2 ref, this should do nothing since a write
+//is immediately preceded by a read leaving it in the same state it was...
+// keyDown = false;
}
else if (addr == 0xC050)
{
{
hiRes = true;
}
+ else if ((addr & 0xFFFB) == 0xC080)
+ {
+#ifdef DEBUG_LC
+WriteLog("LC(R): $C080 49280 OECG R Read RAM bank 2; no write\n");
+#endif
+//$C080 49280 OECG R Read RAM bank 2; no write
+ visibleBank = LC_BANK_2;
+ readRAM = true;
+ writeRAM = false;
+ }
+ else if ((addr & 0xFFFB) == 0xC081)
+ {
+#ifdef DEBUG_LC
+WriteLog("LC(R): $C081 49281 OECG RR Read ROM; write RAM bank 2\n");
+#endif
+//$C081 49281 ROMIN OECG RR Read ROM; write RAM bank 2
+ visibleBank = LC_BANK_2;
+ readRAM = false;
+ writeRAM = true;
+ }
+ else if ((addr & 0xFFFB) == 0xC082)
+ {
+#ifdef DEBUG_LC
+WriteLog("LC(R): $C082 49282 OECG R Read ROM; no write\n");
+#endif
+//$C082 49282 OECG R Read ROM; no write
+ visibleBank = LC_BANK_2;
+ readRAM = false;
+ writeRAM = false;
+ }
+ else if ((addr & 0xFFFB) == 0xC083)
+ {
+#ifdef DEBUG_LC
+WriteLog("LC(R): $C083 49283 OECG RR Read/Write RAM bank 2\n");
+#endif
+//$C083 49283 LCBANK2 OECG RR Read/write RAM bank 2
+ visibleBank = LC_BANK_2;
+ readRAM = true;
+ writeRAM = true;
+ }
+ else if ((addr & 0xFFFB) == 0xC088)
+ {
+#ifdef DEBUG_LC
+WriteLog("LC(R): $C088 49288 OECG R Read RAM bank 1; no write\n");
+#endif
+//$C088 49288 OECG R Read RAM bank 1; no write
+ visibleBank = LC_BANK_1;
+ readRAM = true;
+ writeRAM = false;
+ }
+ else if ((addr & 0xFFFB) == 0xC089)
+ {
+#ifdef DEBUG_LC
+WriteLog("LC(R): $C089 49289 OECG RR Read ROM; write RAM bank 1\n");
+#endif
+//$C089 49289 OECG RR Read ROM; write RAM bank 1
+ visibleBank = LC_BANK_1;
+ readRAM = false;
+ writeRAM = true;
+ }
+ else if ((addr & 0xFFFB) == 0xC08A)
+ {
+#ifdef DEBUG_LC
+WriteLog("LC(R): $C08A 49290 OECG R Read ROM; no write\n");
+#endif
+//$C08A 49290 OECG R Read ROM; no write
+ visibleBank = LC_BANK_1;
+ readRAM = false;
+ writeRAM = false;
+ }
+ else if ((addr & 0xFFFB) == 0xC08B)
+ {
+#ifdef DEBUG_LC
+WriteLog("LC(R): $C08B 49291 OECG RR Read/Write RAM bank 1\n");
+#endif
+//$C08B 49291 OECG RR Read/write RAM bank 1
+ visibleBank = LC_BANK_1;
+ readRAM = true;
+ writeRAM = true;
+ }
+//This is determined by which slot it is in--this assumes slot 6. !!! FIX !!!
else if ((addr & 0xFFF8) == 0xC0E0)
{
floppyDrive.ControlStepper(addr & 0x07);
//Load up disk image from config file (for now)...
floppyDrive.LoadImage(settings.diskImagePath1, 0);
- floppyDrive.LoadImage(settings.diskImagePath2, 1);
+// floppyDrive.LoadImage(settings.diskImagePath2, 1);
// floppyDrive.LoadImage("./disks/temp.nib", 1); // Load temp .nib file into second drive...
//Kill the DOS ROM in slot 6 for now...
WriteLog("About to initialize video...\n");
if (!InitVideo())
{
- cout << "Aborting!" << endl;
+ std::cout << "Aborting!" << std::endl;
return -1;
}
Execute65C02(&mainCPU, USEC_TO_M6502_CYCLES(timeToNextEvent));
//We MUST remove a frame's worth of time in order for the CPU to function... !!! FIX !!!
//(Fix so that this is not a requirement!)
- mainCPU.clock -= USEC_TO_M6502_CYCLES(timeToNextEvent);
+//Fixed, but mainCPU.clock is destroyed in the bargain. Oh well.
+// mainCPU.clock -= USEC_TO_M6502_CYCLES(timeToNextEvent);
+ // Handle CPU time delta for sound...
+ AddToSoundTimeBase(USEC_TO_M6502_CYCLES(timeToNextEvent));
HandleNextEvent();
}
}
}
- HandleSoundAtFrameEdge(); // Sound stuff... (ick)
+//ick. HandleSoundAtFrameEdge(); // Sound stuff... (ick)
RenderVideoFrame();
SetCallbackTime(FrameCallback, 16666.66666667);
+//Instead of this, we should yield remaining time to other processes... !!! FIX !!!
+//lessee...
+//nope. SDL_Delay(10);
while (SDL_GetTicks() - startTicks < 16); // Wait for next frame...
startTicks = SDL_GetTicks();
}