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GB MBC: Fix RTC access when no save file is loaded

This commit is contained in:
Jeffrey Pfau 2016-09-25 23:43:05 -07:00
parent fb8781b493
commit 7940428641
2 changed files with 9 additions and 1 deletions
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1
CHANGES
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@ -20,6 +20,7 @@ Bugfixes:
- SDL: Attach rumble in SDL frontend
- GBA Hardware: Improve Game Boy Player rumble behavior
- GB: Initialize audio properly
- GB MBC: Fix RTC access when no save file is loaded
Misc:
- All: Only update version info if needed
- FFmpeg: Encoding cleanup

9
src/gb/mbc.c
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@ -624,6 +624,9 @@ void _GBHuC3(struct GB* gb, uint16_t address, uint8_t value) {
void GBMBCRTCRead(struct GB* gb) {
struct GBMBCRTCSaveBuffer rtcBuffer;
struct VFile* vf = gb->sramVf;
if (!vf) {
return;
}
ssize_t end = vf->seek(vf, -sizeof(rtcBuffer), SEEK_END);
switch (end & 0x1FFF) {
case 0:
@ -645,6 +648,11 @@ void GBMBCRTCRead(struct GB* gb) {
}
void GBMBCRTCWrite(struct GB* gb) {
struct VFile* vf = gb->sramVf;
if (!vf) {
return;
}
uint8_t rtcRegs[5];
memcpy(rtcRegs, gb->memory.rtcRegs, sizeof(rtcRegs));
time_t rtcLastLatch = gb->memory.rtcLastLatch;
@ -663,7 +671,6 @@ void GBMBCRTCWrite(struct GB* gb) {
STORE_32LE(gb->memory.rtcRegs[4], 0, &rtcBuffer.latchedDaysHi);
STORE_64LE(rtcLastLatch, 0, &rtcBuffer.unixTime);
struct VFile* vf = gb->sramVf;
vf->seek(vf, gb->sramSize, SEEK_SET);
vf->write(vf, &rtcBuffer, sizeof(rtcBuffer));
}