Shamusworld >> Repos - virtualjaguar/blob - src/jerry.cpp

   1 //
   2 // JERRY Core
   3 //
   4 // Originally by David Raingeard
   5 // GCC/SDL port by Niels Wagenaar (Linux/WIN32) and Carwin Jones (BeOS)
   6 // Cleanups/rewrites/fixes by James Hammons
   7 //
   8 // JLH = James Hammons <jlhamm@acm.org>
   9 //
  10 // WHO  WHEN        WHAT
  11 // ---  ----------  -----------------------------------------------------------
  12 // JLH  11/25/2009  Major rewrite of memory subsystem and handlers
  13 //
  14
  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 // ------------------------------------------------------------
 153
 154 #include "jerry.h"
 155
 156 #include <string.h>                                                             // For memcpy
 157 //#include <math.h>
 158 #include "cdrom.h"
 159 #include "dac.h"
 160 #include "dsp.h"
 161 #include "eeprom.h"
 162 #include "event.h"
 163 #include "jaguar.h"
 164 #include "joystick.h"
 165 #include "log.h"
 166 #include "m68000/m68kinterface.h"
 167 #include "settings.h"
 168 #include "tom.h"
 169 //#include "memory.h"
 170 #include "wavetable.h"
 171
 172 //Note that 44100 Hz requires samples every 22.675737 usec.
 173 //#define JERRY_DEBUG
 174
 175 /*static*/ uint8_t jerry_ram_8[0x10000];
 176
 177 //#define JERRY_CONFIG  0x4002                                          // ??? What's this ???
 178
 179 // JERRY Registers (write, offset from $F10000)
 180 #define JPIT1           0x00
 181 #define JPIT2           0x02
 182 #define JPIT3           0x04
 183 #define JPIT4           0x08
 184 #define CLK1            0x10
 185 #define CLK2            0x12
 186 #define CLK3            0x14
 187 #define JINTCTRL        0x20
 188 #define ASIDATA         0x30
 189 #define ASICTRL         0x32
 190 #define ASICLK          0x34
 191 #define SCLK            0xA150
 192 #define SMODE           0xA154
 193
 194
 195 uint8_t analog_x, analog_y;
 196
 197 static uint32_t JERRYPIT1Prescaler;
 198 static uint32_t JERRYPIT1Divider;
 199 static uint32_t JERRYPIT2Prescaler;
 200 static uint32_t JERRYPIT2Divider;
 201 static int32_t jerry_timer_1_counter;
 202 static int32_t jerry_timer_2_counter;
 203
 204 //uint32_t JERRYI2SInterruptDivide = 8;
 205 int32_t JERRYI2SInterruptTimer = -1;
 206 uint32_t jerryI2SCycles;
 207 uint32_t jerryIntPending;
 208
 209 static uint16_t jerryInterruptMask = 0;
 210 static uint16_t jerryPendingInterrupt = 0;
 211
 212 // Private function prototypes
 213
 214 void JERRYResetPIT1(void);
 215 void JERRYResetPIT2(void);
 216 void JERRYResetI2S(void);
 217
 218 void JERRYPIT1Callback(void);
 219 void JERRYPIT2Callback(void);
 220 void JERRYI2SCallback(void);
 221
 222
 223 void JERRYResetI2S(void)
 224 {
 225         //WriteLog("i2s: reseting\n");
 226 //This is really SCLK... !!! FIX !!!
 227         sclk = 8;
 228         JERRYI2SInterruptTimer = -1;
 229 }
 230
 231
 232 void JERRYResetPIT1(void)
 233 {
 234         RemoveCallback(JERRYPIT1Callback);
 235
 236         if (JERRYPIT1Prescaler | JERRYPIT1Divider)
 237         {
 238                 double usecs = (float)(JERRYPIT1Prescaler + 1) * (float)(JERRYPIT1Divider + 1) * RISC_CYCLE_IN_USEC;
 239                 SetCallbackTime(JERRYPIT1Callback, usecs, EVENT_JERRY);
 240         }
 241 }
 242
 243
 244 void JERRYResetPIT2(void)
 245 {
 246         RemoveCallback(JERRYPIT2Callback);
 247
 248         if (JERRYPIT1Prescaler | JERRYPIT1Divider)
 249         {
 250                 double usecs = (float)(JERRYPIT2Prescaler + 1) * (float)(JERRYPIT2Divider + 1) * RISC_CYCLE_IN_USEC;
 251                 SetCallbackTime(JERRYPIT2Callback, usecs, EVENT_JERRY);
 252         }
 253 }
 254
 255
 256 // This is the cause of the regressions in Cybermorph and Missile Command 3D...
 257 // Solution: Probably have to check the DSP enable bit before sending these thru.
 258 //#define JERRY_NO_IRQS
 259 void JERRYPIT1Callback(void)
 260 {
 261 #ifndef JERRY_NO_IRQS
 262 //WriteLog("JERRY: In PIT1 callback, IRQM=$%04X\n", jerryInterruptMask);
 263         if (TOMIRQEnabled(IRQ_DSP))
 264         {
 265                 if (jerryInterruptMask & IRQ2_TIMER1)           // CPU Timer 1 IRQ
 266                 {
 267 // Not sure, but I think we don't generate another IRQ if one's already going...
 268 // But this seems to work... :-/
 269                         jerryPendingInterrupt |= IRQ2_TIMER1;
 270                         m68k_set_irq(2);                                                // Generate 68K IPL 2
 271                 }
 272         }
 273 #endif
 274
 275         DSPSetIRQLine(DSPIRQ_TIMER0, ASSERT_LINE);      // This does the 'IRQ enabled' checking...
 276         JERRYResetPIT1();
 277 }
 278
 279
 280 void JERRYPIT2Callback(void)
 281 {
 282 #ifndef JERRY_NO_IRQS
 283         if (TOMIRQEnabled(IRQ_DSP))
 284         {
 285 //WriteLog("JERRY: In PIT2 callback, IRQM=$%04X\n", jerryInterruptMask);
 286                 if (jerryInterruptMask & IRQ2_TIMER2)           // CPU Timer 2 IRQ
 287                 {
 288                         jerryPendingInterrupt |= IRQ2_TIMER2;
 289                         m68k_set_irq(2);                                                // Generate 68K IPL 2
 290                 }
 291         }
 292 #endif
 293
 294         DSPSetIRQLine(DSPIRQ_TIMER1, ASSERT_LINE);      // This does the 'IRQ enabled' checking...
 295         JERRYResetPIT2();
 296 }
 297
 298
 299 void JERRYI2SCallback(void)
 300 {
 301         // We don't have to divide the RISC clock rate by this--the reason is a bit
 302         // convoluted. Will put explanation here later...
 303 // What's needed here is to find the ratio of the frequency to the number of clock cycles
 304 // in one second. For example, if the sample rate is 44100, we divide the clock rate by
 305 // this: 26590906 / 44100 = 602 cycles.
 306 // Which means, every 602 cycles that go by we have to generate an interrupt.
 307         jerryI2SCycles = 32 * (2 * (sclk + 1));
 308 //This makes audio faster, but not enough and the pitch is wrong besides
 309 //      jerryI2SCycles = 32 * (2 * (sclk - 1));
 310
 311         // If INTERNAL flag is set, then JERRY's SCLK is master
 312         if (smode & SMODE_INTERNAL)
 313         {
 314                 // This does the 'IRQ enabled' checking...
 315                 DSPSetIRQLine(DSPIRQ_SSI, ASSERT_LINE);
 316 //              double usecs = (float)jerryI2SCycles * RISC_CYCLE_IN_USEC;
 317 //this fix is almost enough to fix timings in tripper, but not quite enough...
 318                 double usecs = (float)jerryI2SCycles * (vjs.hardwareTypeNTSC ? RISC_CYCLE_IN_USEC : RISC_CYCLE_PAL_IN_USEC);
 319                 SetCallbackTime(JERRYI2SCallback, usecs, EVENT_JERRY);
 320         }
 321         else
 322         {
 323                 // JERRY is slave to external word clock
 324
 325 //Note that 44100 Hz requires samples every 22.675737 usec.
 326 //When JERRY is slave to the word clock, we need to do interrupts either at 44.1K
 327 //sample rate or at a 88.2K sample rate (11.332... usec).
 328 /*              // This is just a temporary kludge to see if the CD bus mastering works
 329                 // I.e., this is totally faked...!
 330 // The whole interrupt system is pretty much borked and is need of an overhaul.
 331 // What we need is a way of handling these interrupts when they happen instead of
 332 // scanline boundaries the way it is now.
 333                 jerry_i2s_interrupt_timer -= cycles;
 334                 if (jerry_i2s_interrupt_timer <= 0)
 335                 {
 336 //This is probably wrong as well (i.e., need to check enable lines)... !!! FIX !!! [DONE]
 337                         if (ButchIsReadyToSend())//Not sure this is right spot to check...
 338                         {
 339 //      return GetWordFromButchSSI(offset, who);
 340                                 SetSSIWordsXmittedFromButch();
 341                                 DSPSetIRQLine(DSPIRQ_SSI, ASSERT_LINE);
 342                         }
 343                         jerry_i2s_interrupt_timer += 602;
 344                 }*/
 345
 346                 if (ButchIsReadyToSend())//Not sure this is right spot to check...
 347                 {
 348 //      return GetWordFromButchSSI(offset, who);
 349                         SetSSIWordsXmittedFromButch();
 350                         DSPSetIRQLine(DSPIRQ_SSI, ASSERT_LINE);
 351                 }
 352
 353                 SetCallbackTime(JERRYI2SCallback, 22.675737, EVENT_JERRY);
 354         }
 355 }
 356
 357
 358 void JERRYInit(void)
 359 {
 360         JoystickInit();
 361         memcpy(&jerry_ram_8[0xD000], waveTableROM, 0x1000);
 362
 363         JERRYPIT1Prescaler = 0xFFFF;
 364         JERRYPIT2Prescaler = 0xFFFF;
 365         JERRYPIT1Divider = 0xFFFF;
 366         JERRYPIT2Divider = 0xFFFF;
 367         jerryInterruptMask = 0x0000;
 368         jerryPendingInterrupt = 0x0000;
 369
 370         DACInit();
 371 }
 372
 373
 374 void JERRYReset(void)
 375 {
 376         JoystickReset();
 377         EepromReset();
 378         JERRYResetI2S();
 379
 380         memset(jerry_ram_8, 0x00, 0xD000);              // Don't clear out the Wavetable ROM...!
 381         JERRYPIT1Prescaler = 0xFFFF;
 382         JERRYPIT2Prescaler = 0xFFFF;
 383         JERRYPIT1Divider = 0xFFFF;
 384         JERRYPIT2Divider = 0xFFFF;
 385         jerry_timer_1_counter = 0;
 386         jerry_timer_2_counter = 0;
 387         jerryInterruptMask = 0x0000;
 388         jerryPendingInterrupt = 0x0000;
 389
 390         DACReset();
 391 }
 392
 393
 394 void JERRYDone(void)
 395 {
 396         JERRYDumpIORegistersToLog();
 397         WriteLog("JERRY: M68K Interrupt control ($F10020) = %04X\n", GET16(jerry_ram_8, 0x20));
 398         JoystickDone();
 399         DACDone();
 400         EepromDone();
 401 }
 402
 403
 404 bool JERRYIRQEnabled(int irq)
 405 {
 406         // Read the word @ $F10020
 407 //      return jerry_ram_8[0x21] & (1 << irq);
 408         return jerryInterruptMask & irq;
 409 }
 410
 411
 412 void JERRYSetPendingIRQ(int irq)
 413 {
 414         // This is the shadow of INT (it's a split RO/WO register)
 415 //      jerryIntPending |= (1 << irq);
 416         jerryPendingInterrupt |= irq;
 417 }
 418
 419 //
 420 // Dump all JERRY register values to the log
 421 //
 422 void JERRYDumpIORegistersToLog(void)
 423 {
 424         WriteLog("\n\n---------------------------------------------------------------------\n");
 425         WriteLog("JERRY I/O Registers\n");
 426         WriteLog("---------------------------------------------------------------------\n");
 427         WriteLog("F1%04X    (JPIT1): $%04X\n", JPIT1,    GET16(jerry_ram_8, JPIT1));
 428         WriteLog("F1%04X    (JPIT2): $%04X\n", JPIT2,    GET16(jerry_ram_8, JPIT2));
 429         WriteLog("F1%04X    (JPIT3): $%04X\n", JPIT3,    GET16(jerry_ram_8, JPIT3));
 430         WriteLog("F1%04X    (JPIT4): $%04X\n", JPIT4,    GET16(jerry_ram_8, JPIT4));
 431         WriteLog("F1%04X     (CLK1): $%04X\n", CLK1,     GET16(jerry_ram_8, CLK1));
 432         WriteLog("F1%04X     (CLK2): $%04X\n", CLK2,     GET16(jerry_ram_8, CLK2));
 433         WriteLog("F1%04X     (CLK3): $%04X\n", CLK3,     GET16(jerry_ram_8, CLK3));
 434         WriteLog("F1%04X (JINTCTRL): $%04X\n", JINTCTRL, GET16(jerry_ram_8, JINTCTRL));
 435         WriteLog("F1%04X  (ASIDATA): $%04X\n", ASIDATA,  GET16(jerry_ram_8, ASIDATA));
 436         WriteLog("F1%04X  (ASICTRL): $%04X\n", ASICTRL,  GET16(jerry_ram_8, ASICTRL));
 437         WriteLog("F1%04X   (ASICLK): $%04X\n", ASICLK,   GET16(jerry_ram_8, ASICLK));
 438         WriteLog("F1%04X     (SCLK): $%04X\n", SCLK,     GET16(jerry_ram_8, SCLK));
 439         WriteLog("F1%04X    (SMODE): $%04X\n", SMODE,    GET16(jerry_ram_8, SMODE));
 440         WriteLog("---------------------------------------------------------------------\n\n\n");
 441 }
 442
 443
 444 //
 445 // JERRY byte access (read)
 446 //
 447 uint8_t JERRYReadByte(uint32_t offset, uint32_t who/*=UNKNOWN*/)
 448 {
 449 #ifdef JERRY_DEBUG
 450         WriteLog("JERRY: Reading byte at %06X\n", offset);
 451 #endif
 452         if ((offset >= DSP_CONTROL_RAM_BASE) && (offset < DSP_CONTROL_RAM_BASE+0x20))
 453                 return DSPReadByte(offset, who);
 454         else if ((offset >= DSP_WORK_RAM_BASE) && (offset < DSP_WORK_RAM_BASE+0x2000))
 455                 return DSPReadByte(offset, who);
 456         // LRXD/RRXD/SSTAT $F1A148/4C/50 (really 16-bit registers...)
 457         else if (offset >= 0xF1A148 && offset <= 0xF1A153)
 458                 return DACReadByte(offset, who);
 459 //      F10036          R     xxxxxxxx xxxxxxxx   JPIT1 - timer 1 pre-scaler
 460 //      F10038          R     xxxxxxxx xxxxxxxx   JPIT2 - timer 1 divider
 461 //      F1003A          R     xxxxxxxx xxxxxxxx   JPIT3 - timer 2 pre-scaler
 462 //      F1003C          R     xxxxxxxx xxxxxxxx   JPIT4 - timer 2 divider
 463 //This is WRONG!
 464 //      else if (offset >= 0xF10000 && offset <= 0xF10007)
 465 //This is still wrong. What needs to be returned here are the values being counted down
 466 //in the jerry_timer_n_counter variables... !!! FIX !!! [DONE]
 467
 468 //This is probably the problem with the new timer code... This is invalid
 469 //under the new system... !!! FIX !!!
 470         else if ((offset >= 0xF10036) && (offset <= 0xF1003D))
 471         {
 472 WriteLog("JERRY: Unhandled timer read (BYTE) at %08X...\n", offset);
 473         }
 474 //      else if (offset >= 0xF10010 && offset <= 0xF10015)
 475 //              return clock_byte_read(offset);
 476 //      else if (offset >= 0xF17C00 && offset <= 0xF17C01)
 477 //              return anajoy_byte_read(offset);
 478         else if (offset >= 0xF14000 && offset <= 0xF14003)
 479 //              return JoystickReadByte(offset) | EepromReadByte(offset);
 480         {
 481                 uint16_t value = JoystickReadWord(offset & 0xFE);
 482
 483                 if (offset & 0x01)
 484                         value &= 0xFF;
 485                 else
 486                         value >>= 8;
 487
 488                 // This is wrong, should only have the lowest bit from $F14001
 489                 return value | EepromReadByte(offset);
 490         }
 491         else if (offset >= 0xF14000 && offset <= 0xF1A0FF)
 492                 return EepromReadByte(offset);
 493
 494         return jerry_ram_8[offset & 0xFFFF];
 495 }
 496
 497
 498 //
 499 // JERRY word access (read)
 500 //
 501 uint16_t JERRYReadWord(uint32_t offset, uint32_t who/*=UNKNOWN*/)
 502 {
 503 #ifdef JERRY_DEBUG
 504         WriteLog("JERRY: Reading word at %06X\n", offset);
 505 #endif
 506
 507         if ((offset >= DSP_CONTROL_RAM_BASE) && (offset < DSP_CONTROL_RAM_BASE+0x20))
 508                 return DSPReadWord(offset, who);
 509         else if (offset >= DSP_WORK_RAM_BASE && offset <= DSP_WORK_RAM_BASE + 0x1FFF)
 510                 return DSPReadWord(offset, who);
 511         // LRXD/RRXD/SSTAT $F1A148/4C/50 (really 16-bit registers...)
 512         else if (offset >= 0xF1A148 && offset <= 0xF1A153)
 513                 return DACReadWord(offset, who);
 514 //      F10036          R     xxxxxxxx xxxxxxxx   JPIT1 - timer 1 pre-scaler
 515 //      F10038          R     xxxxxxxx xxxxxxxx   JPIT2 - timer 1 divider
 516 //      F1003A          R     xxxxxxxx xxxxxxxx   JPIT3 - timer 2 pre-scaler
 517 //      F1003C          R     xxxxxxxx xxxxxxxx   JPIT4 - timer 2 divider
 518 //This is WRONG!
 519 //      else if ((offset >= 0xF10000) && (offset <= 0xF10007))
 520 //This is still wrong. What needs to be returned here are the values being counted down
 521 //in the jerry_timer_n_counter variables... !!! FIX !!! [DONE]
 522         else if ((offset >= 0xF10036) && (offset <= 0xF1003D))
 523         {
 524 WriteLog("JERRY: Unhandled timer read (WORD) at %08X...\n", offset);
 525         }
 526 //      else if ((offset >= 0xF10010) && (offset <= 0xF10015))
 527 //              return clock_word_read(offset);
 528         else if (offset == 0xF10020)
 529 //              return jerryIntPending;
 530                 return jerryPendingInterrupt;
 531 //      else if ((offset >= 0xF17C00) && (offset <= 0xF17C01))
 532 //              return anajoy_word_read(offset);
 533         else if (offset == 0xF14000)
 534                 return (JoystickReadWord(offset) & 0xFFFE) | EepromReadWord(offset);
 535         else if ((offset >= 0xF14002) && (offset < 0xF14003))
 536                 return JoystickReadWord(offset);
 537         else if ((offset >= 0xF14000) && (offset <= 0xF1A0FF))
 538                 return EepromReadWord(offset);
 539
 540 /*if (offset >= 0xF1D000)
 541         WriteLog("JERRY: Reading word at %08X [%04X]...\n", offset, ((uint16_t)jerry_ram_8[(offset+0)&0xFFFF] << 8) | jerry_ram_8[(offset+1)&0xFFFF]);//*/
 542
 543         offset &= 0xFFFF;                               // Prevent crashing...!
 544         return ((uint16_t)jerry_ram_8[offset+0] << 8) | jerry_ram_8[offset+1];
 545 }
 546
 547
 548 //
 549 // JERRY byte access (write)
 550 //
 551 void JERRYWriteByte(uint32_t offset, uint8_t data, uint32_t who/*=UNKNOWN*/)
 552 {
 553         // Moved here tentatively, so we can see everything written to JERRY.
 554         jerry_ram_8[offset & 0xFFFF] = data;
 555
 556 #ifdef JERRY_DEBUG
 557         WriteLog("jerry: writing byte %.2x at 0x%.6x\n",data,offset);
 558 #endif
 559         if ((offset >= DSP_CONTROL_RAM_BASE) && (offset < DSP_CONTROL_RAM_BASE + 0x20))
 560         {
 561                 DSPWriteByte(offset, data, who);
 562                 return;
 563         }
 564         else if ((offset >= DSP_WORK_RAM_BASE) && (offset < DSP_WORK_RAM_BASE + 0x2000))
 565         {
 566                 DSPWriteByte(offset, data, who);
 567                 return;
 568         }
 569         // SCLK ($F1A150--8 bits wide)
 570 //NOTE: This should be taken care of in DAC...
 571 #if 0
 572         else if ((offset >= 0xF1A152) && (offset <= 0xF1A153))
 573         {
 574 #if 0
 575 //              WriteLog("JERRY: Writing %02X to SCLK...\n", data);
 576                 if ((offset & 0x03) == 2)
 577                         sclk = (sclk & 0x00FF) | ((uint32_t)data << 8);
 578                 else
 579                         sclk = (sclk & 0xFF00) | (uint32_t)data;
 580 #else
 581                 sclk = data;
 582 #endif
 583 #warning "!!! SCLK should be handled in dac.cpp !!!"
 584                 JERRYI2SInterruptTimer = -1;
 585                 RemoveCallback(JERRYI2SCallback);
 586                 JERRYI2SCallback();
 587 //              return;
 588         }
 589 #endif
 590         // LTXD/RTXD/SCLK/SMODE $F1A148/4C/50/54 (really 16-bit registers...)
 591         else if (offset >= 0xF1A148 && offset <= 0xF1A157)
 592         {
 593                 DACWriteByte(offset, data, who);
 594                 return;
 595         }
 596         else if (offset >= 0xF10000 && offset <= 0xF10007)
 597         {
 598 WriteLog("JERRY: Unhandled timer write (BYTE) at %08X...\n", offset);
 599                 return;
 600         }
 601 /*      else if ((offset >= 0xF10010) && (offset <= 0xF10015))
 602         {
 603                 clock_byte_write(offset, data);
 604                 return;
 605         }//*/
 606         // JERRY -> 68K interrupt enables/latches (need to be handled!)
 607         else if (offset >= 0xF10020 && offset <= 0xF10021)//WAS:23)
 608         {
 609                 if (offset == 0xF10020)
 610                 {
 611                         // Clear pending interrupts...
 612                         jerryPendingInterrupt &= ~data;
 613                 }
 614                 else if (offset == 0xF10021)
 615                         jerryInterruptMask = data;
 616 //WriteLog("JERRY: (68K int en/lat - Unhandled!) Tried to write $%02X to $%08X!\n", data, offset);
 617 //WriteLog("JERRY: (Previous is partially handled... IRQMask=$%04X)\n", jerryInterruptMask);
 618         }
 619 /*      else if ((offset >= 0xF17C00) && (offset <= 0xF17C01))
 620         {
 621                 anajoy_byte_write(offset, data);
 622                 return;
 623         }*/
 624         else if ((offset >= 0xF14000) && (offset <= 0xF14003))
 625         {
 626 WriteLog("JERRYWriteByte: Unhandled byte write to JOYSTICK by %s.\n", whoName[who]);
 627 //              JoystickWriteByte(offset, data);
 628                 JoystickWriteWord(offset & 0xFE, (uint16_t)data);
 629 // This is wrong, EEPROM is never written here
 630                 EepromWriteByte(offset, data);
 631                 return;
 632         }
 633         else if ((offset >= 0xF14000) && (offset <= 0xF1A0FF))
 634         {
 635                 EepromWriteByte(offset, data);
 636                 return;
 637         }
 638
 639 //Need to protect write attempts to Wavetable ROM (F1D000-FFF)
 640         if (offset >= 0xF1D000 && offset <= 0xF1DFFF)
 641                 return;
 642
 643 //      jerry_ram_8[offset & 0xFFFF] = data;
 644 }
 645
 646
 647 //
 648 // JERRY word access (write)
 649 //
 650 void JERRYWriteWord(uint32_t offset, uint16_t data, uint32_t who/*=UNKNOWN*/)
 651 {
 652         // Moved here tentatively, so we can see everything written to JERRY.
 653         jerry_ram_8[(offset+0) & 0xFFFF] = (data >> 8) & 0xFF;
 654         jerry_ram_8[(offset+1) & 0xFFFF] = data & 0xFF;
 655
 656 #ifdef JERRY_DEBUG
 657         WriteLog( "JERRY: Writing word %04X at %06X\n", data, offset);
 658 #endif
 659 #if 1
 660 if (offset == 0xF10000)
 661         WriteLog("JERRY: JPIT1 word written by %s: %u\n", whoName[who], data);
 662 else if (offset == 0xF10002)
 663         WriteLog("JERRY: JPIT2 word written by %s: %u\n", whoName[who], data);
 664 else if (offset == 0xF10004)
 665         WriteLog("JERRY: JPIT3 word written by %s: %u\n", whoName[who], data);
 666 else if (offset == 0xF10006)
 667         WriteLog("JERRY: JPIT4 word written by %s: %u\n", whoName[who], data);
 668 else if (offset == 0xF10010)
 669         WriteLog("JERRY: CLK1 word written by %s: %u\n", whoName[who], data);
 670 else if (offset == 0xF10012)
 671         WriteLog("JERRY: CLK2 word written by %s: %u\n", whoName[who], data);
 672 else if (offset == 0xF10014)
 673         WriteLog("JERRY: CLK3 word written by %s: %u\n", whoName[who], data);
 674 //else if (offset == 0xF1A100)
 675 //      WriteLog("JERRY: D_FLAGS word written by %s: %u\n", whoName[who], data);
 676 //else if (offset == 0xF1A102)
 677 //      WriteLog("JERRY: D_FLAGS+2 word written by %s: %u\n", whoName[who], data);
 678 else if (offset == 0xF10020)
 679         WriteLog("JERRY: JINTCTRL word written by %s: $%04X (%s%s%s%s%s%s)\n", whoName[who], data,
 680                 (data & 0x01 ? "Extrnl " : ""), (data & 0x02 ? "DSP " : ""),
 681                 (data & 0x04 ? "Timer0 " : ""), (data & 0x08 ? "Timer1 " : ""),
 682                 (data & 0x10 ? "ASI " : ""), (data & 0x20 ? "I2S " : ""));
 683 #endif
 684
 685         if ((offset >= DSP_CONTROL_RAM_BASE) && (offset < DSP_CONTROL_RAM_BASE + 0x20))
 686         {
 687                 DSPWriteWord(offset, data, who);
 688                 return;
 689         }
 690         else if ((offset >= DSP_WORK_RAM_BASE) && (offset < DSP_WORK_RAM_BASE + 0x2000))
 691         {
 692                 DSPWriteWord(offset, data, who);
 693                 return;
 694         }
 695 //NOTE: This should be taken care of in DAC...
 696 #if 0
 697         else if (offset == 0xF1A152)                                    // Bottom half of SCLK ($F1A150)
 698         {
 699 #warning "!!! SCLK should be handled in dac.cpp !!!"
 700                 WriteLog("JERRY: Writing $%X to SCLK (by %s)...\n", data, whoName[who]);
 701 //This should *only* be enabled when SMODE has its INTERNAL bit set! !!! FIX !!!
 702 #if 0
 703                 sclk = (uint8_t)data;
 704 #else
 705                 sclk = data & 0xFF;
 706 #endif
 707                 JERRYI2SInterruptTimer = -1;
 708                 RemoveCallback(JERRYI2SCallback);
 709                 JERRYI2SCallback();
 710
 711                 DACWriteWord(offset, data, who);
 712                 return;
 713         }
 714 #endif
 715         // LTXD/RTXD/SCLK/SMODE $F1A148/4C/50/54 (really 16-bit registers...)
 716         else if (offset >= 0xF1A148 && offset <= 0xF1A156)
 717         {
 718                 DACWriteWord(offset, data, who);
 719                 return;
 720         }
 721         else if (offset >= 0xF10000 && offset <= 0xF10007)
 722         {
 723                 switch(offset & 0x07)
 724                 {
 725                 case 0:
 726                         JERRYPIT1Prescaler = data;
 727                         JERRYResetPIT1();
 728                         break;
 729                 case 2:
 730                         JERRYPIT1Divider = data;
 731                         JERRYResetPIT1();
 732                         break;
 733                 case 4:
 734                         JERRYPIT2Prescaler = data;
 735                         JERRYResetPIT2();
 736                         break;
 737                 case 6:
 738                         JERRYPIT2Divider = data;
 739                         JERRYResetPIT2();
 740                 }
 741                 // Need to handle (unaligned) cases???
 742
 743                 return;
 744         }
 745         // JERRY -> 68K interrupt enables/latches (need to be handled!)
 746         else if (offset >= 0xF10020 && offset <= 0xF10022)
 747         {
 748                 jerryInterruptMask = data & 0xFF;
 749                 jerryPendingInterrupt &= ~(data >> 8);
 750 //WriteLog("JERRY: (68K int en/lat - Unhandled!) Tried to write $%04X to $%08X!\n", data, offset);
 751 //WriteLog("JERRY: (Previous is partially handled... IRQMask=$%04X)\n", jerryInterruptMask);
 752                 return;
 753         }
 754         else if (offset >= 0xF14000 && offset < 0xF14003)
 755         {
 756                 JoystickWriteWord(offset, data);
 757                 EepromWriteWord(offset, data);
 758                 return;
 759         }
 760         else if (offset >= 0xF14000 && offset <= 0xF1A0FF)
 761         {
 762                 EepromWriteWord(offset, data);
 763                 return;
 764         }
 765
 766 //Need to protect write attempts to Wavetable ROM (F1D000-FFF)
 767         if (offset >= 0xF1D000 && offset <= 0xF1DFFF)
 768                 return;
 769
 770 //      jerry_ram_8[(offset+0) & 0xFFFF] = (data >> 8) & 0xFF;
 771 //      jerry_ram_8[(offset+1) & 0xFFFF] = data & 0xFF;
 772 }
 773
 774
 775 int JERRYGetPIT1Frequency(void)
 776 {
 777         int systemClockFrequency = (vjs.hardwareTypeNTSC ? RISC_CLOCK_RATE_NTSC : RISC_CLOCK_RATE_PAL);
 778         return systemClockFrequency / ((JERRYPIT1Prescaler + 1) * (JERRYPIT1Divider + 1));
 779 }
 780
 781
 782 int JERRYGetPIT2Frequency(void)
 783 {
 784         int systemClockFrequency = (vjs.hardwareTypeNTSC ? RISC_CLOCK_RATE_NTSC : RISC_CLOCK_RATE_PAL);
 785         return systemClockFrequency / ((JERRYPIT2Prescaler + 1) * (JERRYPIT2Divider + 1));
 786 }
 787