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Code Issues 18 Packages Projects Releases 2 Wiki Activity

Prevent clearing of RTC on reset

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meepingsnesroms
2018-08-10 10:15:46 -07:00
parent 0194633887
commit f1fe87a80c
2 changed files with 7 additions and 3 deletions
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1
src/emulator.c
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@@ -125,6 +125,7 @@ uint32_t emulatorInit(buffer_t palmRomDump, buffer_t palmBootDump, uint32_t spec
palmClockMultiplier = (specialFeatures & FEATURE_FAST_CPU) ? 2.0 : 1.0;//overclock
palmClockMultiplier *= 0.80;//run at 80% speed, 20% is likely memory waitstates, at 100% it crashes on the spinning Palm welcome screen, 90% works though
palmSpecialFeatures = specialFeatures;
setRtc(0,0,0,0);//RTCTIME and DAYR are not cleared by reset, clear them manually in case the front end doesnt set the RTC
//start running
m68k_pulse_reset();

9
src/hardwareRegisters.c
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@@ -1035,6 +1035,9 @@ void setHwRegister32(uint32_t address, uint32_t value){
void resetHwRegisters(){
uint32_t oldRtc = registerArrayRead32(RTCTIME);//preserve RTCTIME
uint16_t oldDayr = registerArrayRead16(DAYR);//preserve DAYR
memset(palmReg, 0x00, REG_SIZE - BOOTLOADER_SIZE);
palmCrystalCycles = 0.0;
clk32Counter = 0;
@@ -1146,7 +1149,7 @@ void resetHwRegisters(){
registerArrayWrite16(UBAUD2, 0x0002);
registerArrayWrite16(HMARK, 0x0102);
//LCD control registers, unused since the SED1376 is present
//LCD control registers, unused since the SED1376 controls the LCD
registerArrayWrite8(LVPW, 0xFF);
registerArrayWrite16(LXMAX, 0x03F0);
registerArrayWrite16(LYMAX, 0x01FF);
@@ -1157,11 +1160,11 @@ void resetHwRegisters(){
registerArrayWrite8(DMACR, 0x62);
//realtime clock
//RTCTIME is not changed on reset
registerArrayWrite32(RTCTIME, oldRtc);//RTCTIME is not changed on reset
registerArrayWrite16(WATCHDOG, 0x0001);
registerArrayWrite16(RTCCTL, 0x0080);//conflicting size in datasheet, it says its 8 bit but provides 16 bit values
registerArrayWrite16(STPWCH, 0x003F);//conflicting size in datasheet, it says its 8 bit but provides 16 bit values
//DAYR is not changed on reset
registerArrayWrite16(DAYR, oldDayr);//DAYR is not changed on reset
//SDRAM control, unused since RAM refresh is unemulated
registerArrayWrite16(SDCTRL, 0x003C);