Fix a bunch of stuff, add working RICOH RTC emulation.

[pistorm] / Gayle.c

diff --git a/Gayle.c b/Gayle.c
index 8ed04483338ff82340994a616fbd67bf5a9f6406..f07bf2ab7334e0ecffc0985fdda5d7fe56477f44 100644 (file)
--- a/Gayle.c
+++ b/Gayle.c
@@ -16,7 +16,11 @@
 #include <string.h>
 #include <stdlib.h>
 #include <unistd.h>
+#include <time.h>
+#include <endian.h>
 #include "ide.h"
+#include "config_file/config_file.h"
+#include "platforms/amiga/amiga-registers.h"
 
 //#define GSTATUS 0xda201c
 //#define GCLOW   0xda2010
@@ -45,7 +49,7 @@
 #define GCS 0xDA8000   // Card Control
 #define GIRQ 0xDA9000  // IRQ
 #define GINT 0xDAA000  // Int enable
-#define GCONF 0xDAB00  // Gayle Config
+#define GCONF 0xDAB000  // Gayle Config
 
 /* DA8000 */
 #define GAYLE_CS_IDE 0x80   /* IDE int status */
@@ -93,6 +97,8 @@ static uint8_t gayle_irq, gayle_int, gayle_cs, gayle_cs_mask, gayle_cfg;
 static struct ide_controller *ide0;
 int fd;
 
+uint8_t rtc_type = RTC_TYPE_RICOH;
+
 char *hdd_image_file[GAYLE_MAX_HARDFILES];
 
 void set_hard_drive_image_file_amiga(uint8_t index, char *filename) {
@@ -198,6 +204,15 @@ void writeGayleB(unsigned int address, unsigned int value) {
     return;
   }
 
+  if ((address & GAYLEMASK) == CLOCKBASE) {
+    if ((address & CLOCKMASK) >= 0x8000) {
+      printf("Byte write to CDTV SRAM?\n");
+      return;
+    }
+    put_rtc_byte(address, value, rtc_type);
+    return;
+  }
+
   printf("Write Byte to Gayle Space 0x%06x (0x%06x)\n", address, value);
 }
 
@@ -207,13 +222,164 @@ void writeGayle(unsigned int address, unsigned int value) {
     return;
   }
 
+  if ((address & GAYLEMASK) == CLOCKBASE) {
+    if ((address & CLOCKMASK) >= 0x8000) {
+      printf("Word write to CDTV SRAM?\n");
+      return;
+    }
+    printf("Word write to RTC.\n");
+    put_rtc_byte(address, (value & 0xFF), rtc_type);
+    put_rtc_byte(address + 1, (value >> 8), rtc_type);
+    return;
+  }
+
   printf("Write Word to Gayle Space 0x%06x (0x%06x)\n", address, value);
 }
 
 void writeGayleL(unsigned int address, unsigned int value) {
+  if ((address & GAYLEMASK) == CLOCKBASE) {
+    if ((address & CLOCKMASK) >= 0x8000) {
+      printf("Longword write to CDTV SRAM?\n");
+      return;
+    }
+    printf("Longword write to RTC.\n");
+    put_rtc_byte(address, (value & 0xFF), rtc_type);
+    put_rtc_byte(address + 1, ((value & 0x0000FF00) >> 8), rtc_type);
+    put_rtc_byte(address + 2, ((value & 0x00FF0000) >> 16), rtc_type);
+    put_rtc_byte(address + 3, (value >> 24), rtc_type);
+    return;
+  }
+
   printf("Write Long to Gayle Space 0x%06x (0x%06x)\n", address, value);
 }
 
+static unsigned char rtc_mystery_reg[3];
+
+void put_rtc_byte(uint32_t address_, uint8_t value, uint8_t rtc_type) {
+  uint32_t address = address_ & 0x3F;
+  address >>= 2;
+  if (rtc_type == RTC_TYPE_MSM) {
+    switch(address) {
+      case 0x0D:
+        rtc_mystery_reg[address - 0x0D] = value & (0x01 | 0x08);
+        break;
+      case 0x0E:
+      case 0x0F:
+        rtc_mystery_reg[address - 0x0D] = value;
+        break;
+      default:
+        return;
+    }
+  }
+  else {
+    int rtc_bank = (rtc_mystery_reg[0] & 0x03);
+    if ((rtc_bank & 0x02) && address < 0x0D) {
+      // RTC memory access?
+      printf("Write to Ricoh RTC memory.\n");
+      return;
+    }
+    else if ((rtc_bank & 0x01) && address < 0x0D) {
+      // RTC alarm access?
+      printf("Write to Ricoh RTC alarm.\n");
+      return;
+    }
+    else if (address >= 0x0D) {
+      rtc_mystery_reg[address - 0x0D] = value;
+      return;
+    }
+  }
+}
+
+uint8_t get_rtc_byte(uint32_t address_, uint8_t rtc_type) {
+  uint32_t address = address_;
+  address >>= 2;
+  time_t t;
+  time(&t);
+  struct tm *rtc_time = localtime(&t);
+
+  if (rtc_type == RTC_TYPE_RICOH) {
+    int rtc_bank = (rtc_mystery_reg[0] & 0x03);
+    if ((rtc_bank & 0x02) && address < 0x0D) {
+      // RTC memory access?
+      printf("Read from Ricoh RTC memory.\n");
+      return 0;
+    }
+    else if ((rtc_bank & 0x01) && address < 0x0D) {
+      // RTC alarm access?
+      printf("Read from Ricoh RTC alarm.\n");
+      return 0;
+    }
+  }
+
+  switch (address) {
+    case 0x00: // Seconds low?
+      return rtc_time->tm_sec % 10;
+    case 0x01: // Seconds high?
+      return rtc_time->tm_sec / 10;
+    case 0x02: // Minutes low?
+      return rtc_time->tm_min % 10;
+    case 0x03: // Minutes high?
+      return rtc_time->tm_min / 10;
+    case 0x04: // Hours low?
+      return rtc_time->tm_hour % 10;
+    case 0x05: // Hours high?
+      if (rtc_type == RTC_TYPE_MSM) {
+        if (rtc_mystery_reg[2] & 4) {
+          return ((rtc_time->tm_hour / 10) | (rtc_time->tm_hour > 12) ? 0x04 : 0x00);
+        }
+        else
+          return rtc_time->tm_hour / 10;
+      }
+      else {
+        break;
+      }
+    case 0x06: // Day low?
+      if (rtc_type == RTC_TYPE_MSM)
+        return rtc_time->tm_mday % 10;
+      else
+        return rtc_time->tm_wday;
+    case 0x07: // Day high?
+      if (rtc_type == RTC_TYPE_MSM)
+        return rtc_time->tm_mday / 10;
+      else
+        return rtc_time->tm_mday % 10;
+    case 0x08: // Month low?
+      if (rtc_type == RTC_TYPE_MSM)
+        return (rtc_time->tm_mon + 1) % 10;
+      else
+        return rtc_time->tm_mday / 10;
+    case 0x09: // Month high?
+      if (rtc_type == RTC_TYPE_MSM)
+        return (rtc_time->tm_mon + 1) / 10;
+      else
+        return (rtc_time->tm_mon + 1) % 10;
+    case 0x0A: // Year low?
+      if (rtc_type == RTC_TYPE_MSM)
+        return rtc_time->tm_year % 10;
+      else
+        return (rtc_time->tm_mon + 1) / 10;
+    case 0x0B: // Year high?
+      if (rtc_type == RTC_TYPE_MSM)
+        return rtc_time->tm_year / 10;
+      else
+        return rtc_time->tm_year % 10;
+    case 0x0C: // Day of week?
+      if (rtc_type == RTC_TYPE_MSM)
+        return rtc_time->tm_wday;
+      else
+        return rtc_time->tm_year / 10;
+    case 0x0D: // Mystery register D-F?
+      return rtc_mystery_reg[address - 0x0D];
+    case 0x0E:
+    case 0x0F:
+      return 0;
+    default:
+      break;
+  }
+
+  return 0x00;
+}
+
 uint8_t readGayleB(unsigned int address) {
   if (address == GERROR) {
     return ide_read8(ide0, ide_error_r);
@@ -246,6 +412,14 @@ uint8_t readGayleB(unsigned int address) {
     return ide_read8(ide0, ide_altst_r);
   }
 
+  if ((address & GAYLEMASK) == CLOCKBASE) {
+    if ((address & CLOCKMASK) >= 0x8000) {
+      printf("Byte read from CDTV SRAM?\n");
+      return 0;
+    }
+    return get_rtc_byte((address & 0x3F), rtc_type);
+  }
+
   if (address == GIDENT) {
     uint8_t val;
     // printf("Read Byte from Gayle Ident 0x%06x (0x%06x)\n",address,counter);
@@ -304,11 +478,27 @@ uint16_t readGayle(unsigned int address) {
     return value;
   }
 
+  if ((address & GAYLEMASK) == CLOCKBASE) {
+    if ((address & CLOCKMASK) >= 0x8000) {
+      printf("Word read from CDTV SRAM?\n");
+      return 0;
+    }
+    return ((get_rtc_byte((address & 0x3F), rtc_type) << 8) | (get_rtc_byte(((address + 1) & 0x3F), rtc_type)));
+  }
+
   printf("Read Word From Gayle Space 0x%06x\n", address);
   return 0x8000;
 }
 
 uint32_t readGayleL(unsigned int address) {
+  if ((address & GAYLEMASK) == CLOCKBASE) {
+    if ((address & CLOCKMASK) >= 0x8000) {
+      printf("Longword read from CDTV SRAM?\n");
+      return 0;
+    }
+    return ((get_rtc_byte((address & 0x3F), rtc_type) << 24) | (get_rtc_byte(((address + 1) & 0x3F), rtc_type) << 16) | (get_rtc_byte(((address + 2) & 0x3F), rtc_type) << 8) | (get_rtc_byte(((address + 3) & 0x3F), rtc_type)));
+  }
+
   printf("Read Long From Gayle Space 0x%06x\n", address);
   return 0x8000;
 }