4 // Originally by David Raingeard
5 // GCC/SDL port by Niels Wagenaar (Linux/WIN32) and Carwin Jones (BeOS)
6 // Cleanups/rewrites/fixes by James L. Hammons
8 // JLH = James L. Hammons
11 // --- ---------- -----------------------------------------------------------
12 // JLH 11/25/2009 Major rewrite of memory subsystem and handlers
15 // ------------------------------------------------------------
16 // JERRY REGISTERS (Mapped by Aaron Giles)
17 // ------------------------------------------------------------
18 // F10000-F13FFF R/W xxxxxxxx xxxxxxxx Jerry
19 // F10000 W xxxxxxxx xxxxxxxx JPIT1 - timer 1 pre-scaler
20 // F10002 W xxxxxxxx xxxxxxxx JPIT2 - timer 1 divider
21 // F10004 W xxxxxxxx xxxxxxxx JPIT3 - timer 2 pre-scaler
22 // F10008 W xxxxxxxx xxxxxxxx JPIT4 - timer 2 divider
23 // F10010 W ------xx xxxxxxxx CLK1 - processor clock divider
24 // F10012 W ------xx xxxxxxxx CLK2 - video clock divider
25 // F10014 W -------- --xxxxxx CLK3 - chroma clock divider
26 // F10020 R/W ---xxxxx ---xxxxx JINTCTRL - interrupt control register
27 // W ---x---- -------- (J_SYNCLR - clear synchronous serial intf ints)
28 // W ----x--- -------- (J_ASYNCLR - clear asynchronous serial intf ints)
29 // W -----x-- -------- (J_TIM2CLR - clear timer 2 [tempo] interrupts)
30 // W ------x- -------- (J_TIM1CLR - clear timer 1 [sample] interrupts)
31 // W -------x -------- (J_EXTCLR - clear external interrupts)
32 // R/W -------- ---x---- (J_SYNENA - enable synchronous serial intf ints)
33 // R/W -------- ----x--- (J_ASYNENA - enable asynchronous serial intf ints)
34 // R/W -------- -----x-- (J_TIM2ENA - enable timer 2 [tempo] interrupts)
35 // R/W -------- ------x- (J_TIM1ENA - enable timer 1 [sample] interrupts)
36 // R/W -------- -------x (J_EXTENA - enable external interrupts)
37 // F10030 R/W -------- xxxxxxxx ASIDATA - asynchronous serial data
38 // F10032 W -x------ -xxxxxxx ASICTRL - asynchronous serial control
39 // W -x------ -------- (TXBRK - transmit break)
40 // W -------- -x------ (CLRERR - clear error)
41 // W -------- --x----- (RINTEN - enable receiver interrupts)
42 // W -------- ---x---- (TINTEN - enable transmitter interrupts)
43 // W -------- ----x--- (RXIPOL - receiver input polarity)
44 // W -------- -----x-- (TXOPOL - transmitter output polarity)
45 // W -------- ------x- (PAREN - parity enable)
46 // W -------- -------x (ODD - odd parity select)
47 // F10032 R xxx-xxxx x-xxxxxx ASISTAT - asynchronous serial status
48 // R x------- -------- (ERROR - OR of PE,FE,OE)
49 // R -x------ -------- (TXBRK - transmit break)
50 // R --x----- -------- (SERIN - serial input)
51 // R ----x--- -------- (OE - overrun error)
52 // R -----x-- -------- (FE - framing error)
53 // R ------x- -------- (PE - parity error)
54 // R -------x -------- (TBE - transmit buffer empty)
55 // R -------- x------- (RBF - receive buffer full)
56 // R -------- ---x---- (TINTEN - enable transmitter interrupts)
57 // R -------- ----x--- (RXIPOL - receiver input polarity)
58 // R -------- -----x-- (TXOPOL - transmitter output polarity)
59 // R -------- ------x- (PAREN - parity enable)
60 // R -------- -------x (ODD - odd parity)
61 // F10034 R/W xxxxxxxx xxxxxxxx ASICLK - asynchronous serial interface clock
62 // F10036 R xxxxxxxx xxxxxxxx JPIT1 - timer 1 pre-scaler
63 // F10038 R xxxxxxxx xxxxxxxx JPIT2 - timer 1 divider
64 // F1003A R xxxxxxxx xxxxxxxx JPIT3 - timer 2 pre-scaler
65 // F1003C R xxxxxxxx xxxxxxxx JPIT4 - timer 2 divider
66 // ------------------------------------------------------------
67 // F14000-F17FFF R/W xxxxxxxx xxxxxxxx Joysticks and GPIO0-5
68 // F14000 R xxxxxxxx xxxxxxxx JOYSTICK - read joystick state
69 // F14000 W x------- xxxxxxxx JOYSTICK - latch joystick output
70 // W x------- -------- (enable joystick outputs)
71 // W -------- xxxxxxxx (joystick output data)
72 // F14002 R xxxxxxxx xxxxxxxx JOYBUTS - button register
73 // F14800-F14FFF R/W xxxxxxxx xxxxxxxx GPI00 - reserved (CD-ROM? no.)
74 // F15000-F15FFF R/W xxxxxxxx xxxxxxxx GPI01 - reserved
75 // F16000-F16FFF R/W xxxxxxxx xxxxxxxx GPI02 - reserved
76 // F17000-F177FF R/W xxxxxxxx xxxxxxxx GPI03 - reserved
77 // F17800-F17BFF R/W xxxxxxxx xxxxxxxx GPI04 - reserved
78 // F17C00-F17FFF R/W xxxxxxxx xxxxxxxx GPI05 - reserved
79 // ------------------------------------------------------------
80 // F18000-F1FFFF R/W xxxxxxxx xxxxxxxx Jerry DSP
81 // F1A100 R/W xxxxxxxx xxxxxxxx D_FLAGS - DSP flags register
82 // R/W x------- -------- (DMAEN - DMA enable)
83 // R/W -x------ -------- (REGPAGE - register page)
84 // W --x----- -------- (D_EXT0CLR - clear external interrupt 0)
85 // W ---x---- -------- (D_TIM2CLR - clear timer 2 interrupt)
86 // W ----x--- -------- (D_TIM1CLR - clear timer 1 interrupt)
87 // W -----x-- -------- (D_I2SCLR - clear I2S interrupt)
88 // W ------x- -------- (D_CPUCLR - clear CPU interrupt)
89 // R/W -------x -------- (D_EXT0ENA - enable external interrupt 0)
90 // R/W -------- x------- (D_TIM2ENA - enable timer 2 interrupt)
91 // R/W -------- -x------ (D_TIM1ENA - enable timer 1 interrupt)
92 // R/W -------- --x----- (D_I2SENA - enable I2S interrupt)
93 // R/W -------- ---x---- (D_CPUENA - enable CPU interrupt)
94 // R/W -------- ----x--- (IMASK - interrupt mask)
95 // R/W -------- -----x-- (NEGA_FLAG - ALU negative)
96 // R/W -------- ------x- (CARRY_FLAG - ALU carry)
97 // R/W -------- -------x (ZERO_FLAG - ALU zero)
98 // F1A102 R/W -------- ------xx D_FLAGS - upper DSP flags
99 // R/W -------- ------x- (D_EXT1ENA - enable external interrupt 1)
100 // R/W -------- -------x (D_EXT1CLR - clear external interrupt 1)
101 // F1A104 W -------- ----xxxx D_MTXC - matrix control register
102 // W -------- ----x--- (MATCOL - column/row major)
103 // W -------- -----xxx (MATRIX3-15 - matrix width)
104 // F1A108 W ----xxxx xxxxxx-- D_MTXA - matrix address register
105 // F1A10C W -------- -----x-x D_END - data organization register
106 // W -------- -----x-- (BIG_INST - big endian instruction fetch)
107 // W -------- -------x (BIG_IO - big endian I/O)
108 // F1A110 R/W xxxxxxxx xxxxxxxx D_PC - DSP program counter
109 // F1A114 R/W xxxxxxxx xx-xxxxx D_CTRL - DSP control/status register
110 // R xxxx---- -------- (VERSION - DSP version code)
111 // R/W ----x--- -------- (BUS_HOG - hog the bus!)
112 // R/W -----x-- -------- (D_EXT0LAT - external interrupt 0 latch)
113 // R/W ------x- -------- (D_TIM2LAT - timer 2 interrupt latch)
114 // R/W -------x -------- (D_TIM1LAT - timer 1 interrupt latch)
115 // R/W -------- x------- (D_I2SLAT - I2S interrupt latch)
116 // R/W -------- -x------ (D_CPULAT - CPU interrupt latch)
117 // R/W -------- ---x---- (SINGLE_GO - single step one instruction)
118 // R/W -------- ----x--- (SINGLE_STEP - single step mode)
119 // R/W -------- -----x-- (FORCEINT0 - cause interrupt 0 on GPU)
120 // R/W -------- ------x- (CPUINT - send GPU interrupt to CPU)
121 // R/W -------- -------x (DSPGO - enable DSP execution)
122 // F1A116 R/W -------- -------x D_CTRL - upper DSP control/status register
123 // R/W -------- -------x (D_EXT1LAT - external interrupt 1 latch)
124 // F1A118-F1A11B W xxxxxxxx xxxxxxxx D_MOD - modulo instruction mask
125 // F1A11C-F1A11F R xxxxxxxx xxxxxxxx D_REMAIN - divide unit remainder
126 // F1A11C W -------- -------x D_DIVCTRL - divide unit control
127 // W -------- -------x (DIV_OFFSET - 1=16.16 divide, 0=32-bit divide)
128 // F1A120-F1A123 R xxxxxxxx xxxxxxxx D_MACHI - multiply & accumulate high bits
129 // F1A148 W xxxxxxxx xxxxxxxx R_DAC - right transmit data
130 // F1A14C W xxxxxxxx xxxxxxxx L_DAC - left transmit data
131 // F1A150 W -------- xxxxxxxx SCLK - serial clock frequency
132 // F1A150 R -------- ------xx SSTAT
133 // R -------- ------x- (left - no description)
134 // R -------- -------x (WS - word strobe status)
135 // F1A154 W -------- --xxxx-x SMODE - serial mode
136 // W -------- --x----- (EVERYWORD - interrupt on MSB of every word)
137 // W -------- ---x---- (FALLING - interrupt on falling edge)
138 // W -------- ----x--- (RISING - interrupt of rising edge)
139 // W -------- -----x-- (WSEN - enable word strobes)
140 // W -------- -------x (INTERNAL - enables serial clock)
141 // ------------------------------------------------------------
142 // F1B000-F1CFFF R/W xxxxxxxx xxxxxxxx Local DSP RAM
143 // ------------------------------------------------------------
144 // F1D000 R xxxxxxxx xxxxxxxx ROM_TRI - triangle wave
145 // F1D200 R xxxxxxxx xxxxxxxx ROM_SINE - full sine wave
146 // F1D400 R xxxxxxxx xxxxxxxx ROM_AMSINE - amplitude modulated sine wave
147 // F1D600 R xxxxxxxx xxxxxxxx ROM_12W - sine wave and second order harmonic
148 // F1D800 R xxxxxxxx xxxxxxxx ROM_CHIRP16 - chirp
149 // F1DA00 R xxxxxxxx xxxxxxxx ROM_NTRI - traingle wave with noise
150 // F1DC00 R xxxxxxxx xxxxxxxx ROM_DELTA - spike
151 // F1DE00 R xxxxxxxx xxxxxxxx ROM_NOISE - white noise
152 // ------------------------------------------------------------
156 #include <string.h> // For memcpy
164 #include "joystick.h"
168 //#include "memory.h"
169 #include "wavetable.h"
171 //Note that 44100 Hz requires samples every 22.675737 usec.
172 #define NEW_TIMER_SYSTEM
173 //#define JERRY_DEBUG
175 /*static*/ uint8 jerry_ram_8[0x10000];
177 //#define JERRY_CONFIG 0x4002 // ??? What's this ???
179 uint8 analog_x, analog_y;
181 static uint32 JERRYPIT1Prescaler;
182 static uint32 JERRYPIT1Divider;
183 static uint32 JERRYPIT2Prescaler;
184 static uint32 JERRYPIT2Divider;
185 static int32 jerry_timer_1_counter;
186 static int32 jerry_timer_2_counter;
188 uint32 JERRYI2SInterruptDivide = 8;
189 int32 JERRYI2SInterruptTimer = -1;
190 uint32 jerryI2SCycles;
191 uint32 jerryIntPending;
193 static uint16 jerryInterruptMask = 0;
194 static uint16 jerryPendingInterrupt = 0;
195 // Private function prototypes
197 void JERRYResetPIT1(void);
198 void JERRYResetPIT2(void);
199 void JERRYResetI2S(void);
201 void JERRYPIT1Callback(void);
202 void JERRYPIT2Callback(void);
203 void JERRYI2SCallback(void);
205 //This approach is probably wrong, since the timer is continuously counting down, though
206 //it might only be a problem if the # of interrupts generated is greater than 1--the M68K's
207 //timeslice should be running during that phase... (The DSP needs to be aware of this!)
209 //This is only used by the old system, so once the new timer system is working this
210 //should be safe to nuke.
211 void JERRYI2SExec(uint32 cycles)
213 #ifndef NEW_TIMER_SYSTEM
214 #warning "externed var in source--should be in header file. !!! FIX !!!"
215 extern uint16 serialMode; // From DAC.CPP
216 if (serialMode & 0x01) // INTERNAL flag (JERRY is master)
219 // Why is it called this? Instead of SCLK? Shouldn't this be read from DAC.CPP???
220 //Yes, it should. !!! FIX !!!
221 JERRYI2SInterruptDivide &= 0xFF;
223 if (JERRYI2SInterruptTimer == -1)
225 // We don't have to divide the RISC clock rate by this--the reason is a bit
226 // convoluted. Will put explanation here later...
227 // What's needed here is to find the ratio of the frequency to the number of clock cycles
228 // in one second. For example, if the sample rate is 44100, we divide the clock rate by
229 // this: 26590906 / 44100 = 602 cycles.
230 // Which means, every 602 cycles that go by we have to generate an interrupt.
231 jerryI2SCycles = 32 * (2 * (JERRYI2SInterruptDivide + 1));
234 JERYI2SInterruptTimer -= cycles;
235 if (JERRYI2SInterruptTimer <= 0)
237 //This is probably wrong as well (i.e., need to check enable lines)... !!! FIX !!!
238 DSPSetIRQLine(DSPIRQ_SSI, ASSERT_LINE);
239 JERRYI2SInterruptTimer += jerryI2SCycles;
241 if (JERRYI2SInterruptTimer < 0)
242 WriteLog("JERRY: Missed generating an interrupt (missed %u)!\n", (-JERRYI2SInterruptTimer / jerryI2SCycles) + 1);
246 else // JERRY is slave to external word clock
248 // This is just a temporary kludge to see if the CD bus mastering works
249 // I.e., this is totally faked...!
250 // The whole interrupt system is pretty much borked and is need of an overhaul.
251 // What we need is a way of handling these interrupts when they happen instead of
252 // scanline boundaries the way it is now.
253 JERRYI2SInterruptTimer -= cycles;
254 if (JERRYI2SInterruptTimer <= 0)
256 //This is probably wrong as well (i.e., need to check enable lines)... !!! FIX !!! [DONE]
257 if (ButchIsReadyToSend())//Not sure this is right spot to check...
259 // return GetWordFromButchSSI(offset, who);
260 SetSSIWordsXmittedFromButch();
261 DSPSetIRQLine(DSPIRQ_SSI, ASSERT_LINE);
263 JERRYI2SInterruptTimer += 602;
267 RemoveCallback(JERRYI2SCallback);
272 //NOTE: This is only used by the old execution core. Safe to nuke once it's stable.
273 void JERRYExecPIT(uint32 cycles)
275 //This is wrong too: Counters are *always* spinning! !!! FIX !!! [DONE]
276 // if (jerry_timer_1_counter)
277 jerry_timer_1_counter -= cycles;
279 if (jerry_timer_1_counter <= 0)
281 //Also, it can generate a CPU interrupt as well... !!! FIX !!! or does it? Maybe it goes Timer->GPU->CPU?
282 DSPSetIRQLine(DSPIRQ_TIMER0, ASSERT_LINE); // This does the 'IRQ enabled' checking...
284 jerry_timer_1_counter += (JERRYPIT1Prescaler + 1) * (JERRYPIT1Divider + 1);
287 //This is wrong too: Counters are *always* spinning! !!! FIX !!! [DONE]
288 // if (jerry_timer_2_counter)
289 jerry_timer_2_counter -= cycles;
291 if (jerry_timer_2_counter <= 0)
293 //Also, it can generate a CPU interrupt as well... !!! FIX !!! or does it? Maybe it goes Timer->GPU->CPU?
294 DSPSetIRQLine(DSPIRQ_TIMER1, ASSERT_LINE); // This does the 'IRQ enabled' checking...
296 jerry_timer_2_counter += (JERRYPIT2Prescaler + 1) * (JERRYPIT2Divider + 1);
300 void JERRYResetI2S(void)
302 //WriteLog("i2s: reseting\n");
303 //This is really SCLK... !!! FIX !!!
304 JERRYI2SInterruptDivide = 8;
305 JERRYI2SInterruptTimer = -1;
308 void JERRYResetPIT1(void)
310 #ifndef NEW_TIMER_SYSTEM
311 /* if (!JERRYPIT1Prescaler || !JERRYPIT1Divider)
312 jerry_timer_1_counter = 0;
314 //Small problem with this approach: Overflow if both are = $FFFF. !!! FIX !!!
315 jerry_timer_1_counter = (JERRYPIT1Prescaler + 1) * (JERRYPIT1Divider + 1);
317 // if (jerry_timer_1_counter)
318 // WriteLog("jerry: reseting timer 1 to 0x%.8x (%i)\n",jerry_timer_1_counter,jerry_timer_1_counter);
321 RemoveCallback(JERRYPIT1Callback);
323 if (JERRYPIT1Prescaler | JERRYPIT1Divider)
325 double usecs = (float)(JERRYPIT1Prescaler + 1) * (float)(JERRYPIT1Divider + 1) * RISC_CYCLE_IN_USEC;
326 SetCallbackTime(JERRYPIT1Callback, usecs);
331 void JERRYResetPIT2(void)
333 #ifndef NEW_TIMER_SYSTEM
334 /* if (!JERRYPIT2Prescaler || !JERRYPIT2Divider)
336 jerry_timer_2_counter = 0;
340 jerry_timer_2_counter = (JERRYPIT2Prescaler + 1) * (JERRYPIT2Divider + 1);
342 // if (jerry_timer_2_counter)
343 // WriteLog("jerry: reseting timer 2 to 0x%.8x (%i)\n",jerry_timer_2_counter,jerry_timer_2_counter);
346 RemoveCallback(JERRYPIT2Callback);
348 if (JERRYPIT1Prescaler | JERRYPIT1Divider)
350 double usecs = (float)(JERRYPIT2Prescaler + 1) * (float)(JERRYPIT2Divider + 1) * RISC_CYCLE_IN_USEC;
351 SetCallbackTime(JERRYPIT2Callback, usecs);
356 // This is the cause of the regressions in Cybermorph and Missile Command 3D...
357 // Solution: Probably have to check the DSP enable bit before sending these thru.
358 //#define JERRY_NO_IRQS
359 void JERRYPIT1Callback(void)
361 #ifndef JERRY_NO_IRQS
362 //WriteLog("JERRY: In PIT1 callback, IRQM=$%04X\n", jerryInterruptMask);
363 if (TOMIRQEnabled(IRQ_DSP))
365 if (jerryInterruptMask & IRQ2_TIMER1) // CPU Timer 1 IRQ
367 // Not sure, but I think we don't generate another IRQ if one's already going...
368 // But this seems to work... :-/
369 jerryPendingInterrupt |= IRQ2_TIMER1;
370 m68k_set_irq(2); // Generate 68K IPL 2
375 DSPSetIRQLine(DSPIRQ_TIMER0, ASSERT_LINE); // This does the 'IRQ enabled' checking...
379 void JERRYPIT2Callback(void)
381 #ifndef JERRY_NO_IRQS
382 if (TOMIRQEnabled(IRQ_DSP))
384 //WriteLog("JERRY: In PIT2 callback, IRQM=$%04X\n", jerryInterruptMask);
385 if (jerryInterruptMask & IRQ2_TIMER2) // CPU Timer 2 IRQ
387 jerryPendingInterrupt |= IRQ2_TIMER2;
388 m68k_set_irq(2); // Generate 68K IPL 2
393 DSPSetIRQLine(DSPIRQ_TIMER1, ASSERT_LINE); // This does the 'IRQ enabled' checking...
397 void JERRYI2SCallback(void)
399 // Why is it called this? Instead of SCLK? Shouldn't this be read from DAC.CPP???
400 //Yes, it should. !!! FIX !!!
401 #warning "Why is it called this? Instead of SCLK? Shouldn't this be read from DAC.CPP??? Yes, it should. !!! FIX !!!"
402 JERRYI2SInterruptDivide &= 0xFF;
403 // We don't have to divide the RISC clock rate by this--the reason is a bit
404 // convoluted. Will put explanation here later...
405 // What's needed here is to find the ratio of the frequency to the number of clock cycles
406 // in one second. For example, if the sample rate is 44100, we divide the clock rate by
407 // this: 26590906 / 44100 = 602 cycles.
408 // Which means, every 602 cycles that go by we have to generate an interrupt.
409 jerryI2SCycles = 32 * (2 * (JERRYI2SInterruptDivide + 1));
411 //This should be in this file with an extern reference in the header file so that
412 //DAC.CPP can see it... !!! FIX !!!
413 extern uint16 serialMode; // From DAC.CPP
415 if (serialMode & 0x01) // INTERNAL flag (JERRY is master)
417 DSPSetIRQLine(DSPIRQ_SSI, ASSERT_LINE); // This does the 'IRQ enabled' checking...
418 double usecs = (float)jerryI2SCycles * RISC_CYCLE_IN_USEC;
419 SetCallbackTime(JERRYI2SCallback, usecs);
421 else // JERRY is slave to external word clock
423 //Note that 44100 Hz requires samples every 22.675737 usec.
424 //When JERRY is slave to the word clock, we need to do interrupts either at 44.1K
425 //sample rate or at a 88.2K sample rate (11.332... usec).
426 /* // This is just a temporary kludge to see if the CD bus mastering works
427 // I.e., this is totally faked...!
428 // The whole interrupt system is pretty much borked and is need of an overhaul.
429 // What we need is a way of handling these interrupts when they happen instead of
430 // scanline boundaries the way it is now.
431 jerry_i2s_interrupt_timer -= cycles;
432 if (jerry_i2s_interrupt_timer <= 0)
434 //This is probably wrong as well (i.e., need to check enable lines)... !!! FIX !!! [DONE]
435 if (ButchIsReadyToSend())//Not sure this is right spot to check...
437 // return GetWordFromButchSSI(offset, who);
438 SetSSIWordsXmittedFromButch();
439 DSPSetIRQLine(DSPIRQ_SSI, ASSERT_LINE);
441 jerry_i2s_interrupt_timer += 602;
444 if (ButchIsReadyToSend())//Not sure this is right spot to check...
446 // return GetWordFromButchSSI(offset, who);
447 SetSSIWordsXmittedFromButch();
448 DSPSetIRQLine(DSPIRQ_SSI, ASSERT_LINE);
451 SetCallbackTime(JERRYI2SCallback, 22.675737);
462 //This should be handled with the cart initialization...
464 // memory_malloc_secure((void **)&jerry_ram_8, 0x10000, "JERRY RAM/ROM");
465 memcpy(&jerry_ram_8[0xD000], waveTableROM, 0x1000);
467 JERRYPIT1Prescaler = 0xFFFF;
468 JERRYPIT2Prescaler = 0xFFFF;
469 JERRYPIT1Divider = 0xFFFF;
470 JERRYPIT2Divider = 0xFFFF;
471 jerryInterruptMask = 0x0000;
472 jerryPendingInterrupt = 0x0000;
475 void JERRYReset(void)
484 memset(jerry_ram_8, 0x00, 0xD000); // Don't clear out the Wavetable ROM...!
485 JERRYPIT1Prescaler = 0xFFFF;
486 JERRYPIT2Prescaler = 0xFFFF;
487 JERRYPIT1Divider = 0xFFFF;
488 JERRYPIT2Divider = 0xFFFF;
489 jerry_timer_1_counter = 0;
490 jerry_timer_2_counter = 0;
491 jerryInterruptMask = 0x0000;
492 jerryPendingInterrupt = 0x0000;
497 WriteLog("JERRY: M68K Interrupt control ($F10020) = %04X\n", GET16(jerry_ram_8, 0x20));
498 // memory_free(jerry_ram_8);
506 bool JERRYIRQEnabled(int irq)
508 // Read the word @ $F10020
509 // return jerry_ram_8[0x21] & (1 << irq);
510 return jerryInterruptMask & irq;
513 void JERRYSetPendingIRQ(int irq)
515 // This is the shadow of INT (it's a split RO/WO register)
516 // jerryIntPending |= (1 << irq);
517 jerryPendingInterrupt |= irq;
521 // JERRY byte access (read)
523 uint8 JERRYReadByte(uint32 offset, uint32 who/*=UNKNOWN*/)
526 WriteLog("JERRY: Reading byte at %06X\n", offset);
528 if ((offset >= DSP_CONTROL_RAM_BASE) && (offset < DSP_CONTROL_RAM_BASE+0x20))
529 return DSPReadByte(offset, who);
530 else if ((offset >= DSP_WORK_RAM_BASE) && (offset < DSP_WORK_RAM_BASE+0x2000))
531 return DSPReadByte(offset, who);
532 // LRXD/RRXD/SSTAT $F1A148/4C/50 (really 16-bit registers...)
533 else if (offset >= 0xF1A148 && offset <= 0xF1A153)
534 return DACReadByte(offset, who);
535 // F10036 R xxxxxxxx xxxxxxxx JPIT1 - timer 1 pre-scaler
536 // F10038 R xxxxxxxx xxxxxxxx JPIT2 - timer 1 divider
537 // F1003A R xxxxxxxx xxxxxxxx JPIT3 - timer 2 pre-scaler
538 // F1003C R xxxxxxxx xxxxxxxx JPIT4 - timer 2 divider
540 // else if (offset >= 0xF10000 && offset <= 0xF10007)
541 //This is still wrong. What needs to be returned here are the values being counted down
542 //in the jerry_timer_n_counter variables... !!! FIX !!! [DONE]
544 //This is probably the problem with the new timer code... This is invalid
545 //under the new system... !!! FIX !!!
546 else if ((offset >= 0xF10036) && (offset <= 0xF1003D))
548 #ifndef NEW_TIMER_SYSTEM
549 // jerry_timer_1_counter = (JERRYPIT1Prescaler + 1) * (JERRYPIT1Divider + 1);
550 uint32 counter1Hi = (jerry_timer_1_counter / (JERRYPIT1Divider + 1)) - 1;
551 uint32 counter1Lo = (jerry_timer_1_counter % (JERRYPIT1Divider + 1)) - 1;
552 uint32 counter2Hi = (jerry_timer_2_counter / (JERRYPIT2Divider + 1)) - 1;
553 uint32 counter2Lo = (jerry_timer_2_counter % (JERRYPIT2Divider + 1)) - 1;
555 switch(offset & 0x0F)
558 // return JERRYPIT1Prescaler >> 8;
559 return counter1Hi >> 8;
561 // return JERRYPIT1Prescaler & 0xFF;
562 return counter1Hi & 0xFF;
564 // return JERRYPIT1Divider >> 8;
565 return counter1Lo >> 8;
567 // return JERRYPIT1Divider & 0xFF;
568 return counter1Lo & 0xFF;
570 // return JERRYPIT2Prescaler >> 8;
571 return counter2Hi >> 8;
573 // return JERRYPIT2Prescaler & 0xFF;
574 return counter2Hi & 0xFF;
576 // return JERRYPIT2Divider >> 8;
577 return counter2Lo >> 8;
579 // return JERRYPIT2Divider & 0xFF;
580 return counter2Lo & 0xFF;
583 WriteLog("JERRY: Unhandled timer read (BYTE) at %08X...\n", offset);
586 // else if (offset >= 0xF10010 && offset <= 0xF10015)
587 // return clock_byte_read(offset);
588 // else if (offset >= 0xF17C00 && offset <= 0xF17C01)
589 // return anajoy_byte_read(offset);
590 else if (offset >= 0xF14000 && offset <= 0xF14003)
591 return JoystickReadByte(offset) | EepromReadByte(offset);
592 else if (offset >= 0xF14000 && offset <= 0xF1A0FF)
593 return EepromReadByte(offset);
595 return jerry_ram_8[offset & 0xFFFF];
599 // JERRY word access (read)
601 uint16 JERRYReadWord(uint32 offset, uint32 who/*=UNKNOWN*/)
604 WriteLog("JERRY: Reading word at %06X\n", offset);
607 if ((offset >= DSP_CONTROL_RAM_BASE) && (offset < DSP_CONTROL_RAM_BASE+0x20))
608 return DSPReadWord(offset, who);
609 else if (offset >= DSP_WORK_RAM_BASE && offset <= DSP_WORK_RAM_BASE + 0x1FFF)
610 return DSPReadWord(offset, who);
611 // LRXD/RRXD/SSTAT $F1A148/4C/50 (really 16-bit registers...)
612 else if (offset >= 0xF1A148 && offset <= 0xF1A153)
613 return DACReadWord(offset, who);
614 // F10036 R xxxxxxxx xxxxxxxx JPIT1 - timer 1 pre-scaler
615 // F10038 R xxxxxxxx xxxxxxxx JPIT2 - timer 1 divider
616 // F1003A R xxxxxxxx xxxxxxxx JPIT3 - timer 2 pre-scaler
617 // F1003C R xxxxxxxx xxxxxxxx JPIT4 - timer 2 divider
619 // else if ((offset >= 0xF10000) && (offset <= 0xF10007))
620 //This is still wrong. What needs to be returned here are the values being counted down
621 //in the jerry_timer_n_counter variables... !!! FIX !!! [DONE]
622 else if ((offset >= 0xF10036) && (offset <= 0xF1003D))
624 #ifndef NEW_TIMER_SYSTEM
625 // jerry_timer_1_counter = (JERRYPIT1Prescaler + 1) * (JERRYPIT1Divider + 1);
626 uint32 counter1Hi = (jerry_timer_1_counter / (JERRYPIT1Divider + 1)) - 1;
627 uint32 counter1Lo = (jerry_timer_1_counter % (JERRYPIT1Divider + 1)) - 1;
628 uint32 counter2Hi = (jerry_timer_2_counter / (JERRYPIT2Divider + 1)) - 1;
629 uint32 counter2Lo = (jerry_timer_2_counter % (JERRYPIT2Divider + 1)) - 1;
631 switch(offset & 0x0F)
634 // return JERRYPIT1Prescaler;
637 // return JERRYPIT1Divider;
640 // return JERRYPIT2Prescaler;
643 // return JERRYPIT2Divider;
646 // Unaligned word reads???
648 WriteLog("JERRY: Unhandled timer read (WORD) at %08X...\n", offset);
651 // else if ((offset >= 0xF10010) && (offset <= 0xF10015))
652 // return clock_word_read(offset);
653 else if (offset == 0xF10020)
654 // return jerryIntPending;
655 return jerryPendingInterrupt;
656 // else if ((offset >= 0xF17C00) && (offset <= 0xF17C01))
657 // return anajoy_word_read(offset);
658 else if (offset == 0xF14000)
659 return (JoystickReadWord(offset) & 0xFFFE) | EepromReadWord(offset);
660 else if ((offset >= 0xF14002) && (offset < 0xF14003))
661 return JoystickReadWord(offset);
662 else if ((offset >= 0xF14000) && (offset <= 0xF1A0FF))
663 return EepromReadWord(offset);
665 /*if (offset >= 0xF1D000)
666 WriteLog("JERRY: Reading word at %08X [%04X]...\n", offset, ((uint16)jerry_ram_8[(offset+0)&0xFFFF] << 8) | jerry_ram_8[(offset+1)&0xFFFF]);//*/
668 offset &= 0xFFFF; // Prevent crashing...!
669 return ((uint16)jerry_ram_8[offset+0] << 8) | jerry_ram_8[offset+1];
673 // JERRY byte access (write)
675 void JERRYWriteByte(uint32 offset, uint8 data, uint32 who/*=UNKNOWN*/)
678 WriteLog("jerry: writing byte %.2x at 0x%.6x\n",data,offset);
680 if ((offset >= DSP_CONTROL_RAM_BASE) && (offset < DSP_CONTROL_RAM_BASE+0x20))
682 DSPWriteByte(offset, data, who);
685 else if ((offset >= DSP_WORK_RAM_BASE) && (offset < DSP_WORK_RAM_BASE+0x2000))
687 DSPWriteByte(offset, data, who);
690 // SCLK ($F1A150--8 bits wide)
691 //NOTE: This should be taken care of in DAC...
692 else if ((offset >= 0xF1A152) && (offset <= 0xF1A153))
694 // WriteLog("JERRY: Writing %02X to SCLK...\n", data);
695 if ((offset & 0x03) == 2)
696 JERRYI2SInterruptDivide = (JERRYI2SInterruptDivide & 0x00FF) | ((uint32)data << 8);
698 JERRYI2SInterruptDivide = (JERRYI2SInterruptDivide & 0xFF00) | (uint32)data;
700 JERRYI2SInterruptTimer = -1;
701 #ifndef NEW_TIMER_SYSTEM
704 RemoveCallback(JERRYI2SCallback);
709 // LTXD/RTXD/SCLK/SMODE $F1A148/4C/50/54 (really 16-bit registers...)
710 else if (offset >= 0xF1A148 && offset <= 0xF1A157)
712 DACWriteByte(offset, data, who);
715 else if (offset >= 0xF10000 && offset <= 0xF10007)
717 #ifndef NEW_TIMER_SYSTEM
718 switch (offset & 0x07)
721 JERRYPIT1Prescaler = (JERRYPIT1Prescaler & 0x00FF) | (data << 8);
725 JERRYPIT1Prescaler = (JERRYPIT1Prescaler & 0xFF00) | data;
729 JERRYPIT1Divider = (JERRYPIT1Divider & 0x00FF) | (data << 8);
733 JERRYPIT1Divider = (JERRYPIT1Divider & 0xFF00) | data;
737 JERRYPIT2Prescaler = (JERRYPIT2Prescaler & 0x00FF) | (data << 8);
741 JERRYPIT2Prescaler = (JERRYPIT2Prescaler & 0xFF00) | data;
745 JERRYPIT2Divider = (JERRYPIT2Divider & 0x00FF) | (data << 8);
749 JERRYPIT2Divider = (JERRYPIT2Divider & 0xFF00) | data;
753 WriteLog("JERRY: Unhandled timer write (BYTE) at %08X...\n", offset);
757 /* else if ((offset >= 0xF10010) && (offset <= 0xF10015))
759 clock_byte_write(offset, data);
762 // JERRY -> 68K interrupt enables/latches (need to be handled!)
763 else if (offset >= 0xF10020 && offset <= 0xF10021)//WAS:23)
765 if (offset == 0xF10020)
767 // Clear pending interrupts...
768 jerryPendingInterrupt &= ~data;
770 else if (offset == 0xF10021)
771 jerryInterruptMask = data;
772 //WriteLog("JERRY: (68K int en/lat - Unhandled!) Tried to write $%02X to $%08X!\n", data, offset);
773 //WriteLog("JERRY: (Previous is partially handled... IRQMask=$%04X)\n", jerryInterruptMask);
775 /* else if ((offset >= 0xF17C00) && (offset <= 0xF17C01))
777 anajoy_byte_write(offset, data);
780 else if ((offset >= 0xF14000) && (offset <= 0xF14003))
782 JoystickWriteByte(offset, data);
783 EepromWriteByte(offset, data);
786 else if ((offset >= 0xF14000) && (offset <= 0xF1A0FF))
788 EepromWriteByte(offset, data);
792 //Need to protect write attempts to Wavetable ROM (F1D000-FFF)
793 if (offset >= 0xF1D000 && offset <= 0xF1DFFF)
796 jerry_ram_8[offset & 0xFFFF] = data;
800 // JERRY word access (write)
802 void JERRYWriteWord(uint32 offset, uint16 data, uint32 who/*=UNKNOWN*/)
805 WriteLog( "JERRY: Writing word %04X at %06X\n", data, offset);
808 if (offset == 0xF10000)
809 WriteLog("JERRY: JPIT1 word written by %s: %u\n", whoName[who], data);
810 else if (offset == 0xF10002)
811 WriteLog("JERRY: JPIT2 word written by %s: %u\n", whoName[who], data);
812 else if (offset == 0xF10004)
813 WriteLog("JERRY: JPIT3 word written by %s: %u\n", whoName[who], data);
814 else if (offset == 0xF10006)
815 WriteLog("JERRY: JPIT4 word written by %s: %u\n", whoName[who], data);
816 else if (offset == 0xF10010)
817 WriteLog("JERRY: CLK1 word written by %s: %u\n", whoName[who], data);
818 else if (offset == 0xF10012)
819 WriteLog("JERRY: CLK2 word written by %s: %u\n", whoName[who], data);
820 else if (offset == 0xF10014)
821 WriteLog("JERRY: CLK3 word written by %s: %u\n", whoName[who], data);
822 //else if (offset == 0xF10020)
823 // WriteLog("JERRY: JINTCTRL word written by %s: $%04X\n", whoName[who], data);
826 if ((offset >= DSP_CONTROL_RAM_BASE) && (offset < DSP_CONTROL_RAM_BASE+0x20))
828 DSPWriteWord(offset, data, who);
831 else if ((offset >= DSP_WORK_RAM_BASE) && (offset < DSP_WORK_RAM_BASE+0x2000))
833 DSPWriteWord(offset, data, who);
836 //NOTE: This should be taken care of in DAC...
837 else if (offset == 0xF1A152) // Bottom half of SCLK ($F1A150)
839 WriteLog("JERRY: Writing %04X to SCLK (by %s)...\n", data, whoName[who]);
840 //This should *only* be enabled when SMODE has its INTERNAL bit set! !!! FIX !!!
841 JERRYI2SInterruptDivide = (uint8)data;
842 JERRYI2SInterruptTimer = -1;
843 #ifndef NEW_TIMER_SYSTEM
846 RemoveCallback(JERRYI2SCallback);
850 DACWriteWord(offset, data, who);
853 // LTXD/RTXD/SCLK/SMODE $F1A148/4C/50/54 (really 16-bit registers...)
854 else if (offset >= 0xF1A148 && offset <= 0xF1A156)
856 DACWriteWord(offset, data, who);
859 else if (offset >= 0xF10000 && offset <= 0xF10007)
861 //#ifndef NEW_TIMER_SYSTEM
863 switch(offset & 0x07)
866 JERRYPIT1Prescaler = data;
870 JERRYPIT1Divider = data;
874 JERRYPIT2Prescaler = data;
878 JERRYPIT2Divider = data;
881 // Need to handle (unaligned) cases???
883 WriteLog("JERRY: Unhandled timer write %04X (WORD) at %08X by %s...\n", data, offset, whoName[who]);
887 /* else if (offset >= 0xF10010 && offset < 0xF10016)
889 clock_word_write(offset, data);
892 // JERRY -> 68K interrupt enables/latches (need to be handled!)
893 else if (offset >= 0xF10020 && offset <= 0xF10022)
895 jerryInterruptMask = data & 0xFF;
896 jerryPendingInterrupt &= ~(data >> 8);
897 //WriteLog("JERRY: (68K int en/lat - Unhandled!) Tried to write $%04X to $%08X!\n", data, offset);
898 //WriteLog("JERRY: (Previous is partially handled... IRQMask=$%04X)\n", jerryInterruptMask);
901 /* else if (offset >= 0xF17C00 && offset < 0xF17C02)
903 //I think this was removed from the Jaguar. If so, then we don't need this...!
904 anajoy_word_write(offset, data);
907 else if (offset >= 0xF14000 && offset < 0xF14003)
909 JoystickWriteWord(offset, data);
910 EepromWriteWord(offset, data);
913 else if (offset >= 0xF14000 && offset <= 0xF1A0FF)
915 EepromWriteWord(offset, data);
919 //Need to protect write attempts to Wavetable ROM (F1D000-FFF)
920 if (offset >= 0xF1D000 && offset <= 0xF1DFFF)
923 jerry_ram_8[(offset+0) & 0xFFFF] = (data >> 8) & 0xFF;
924 jerry_ram_8[(offset+1) & 0xFFFF] = data & 0xFF;