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GB IO: Make palettes readable

This commit is contained in:
Jeffrey Pfau 2016-02-17 19:42:06 -08:00
parent b9baee7370
commit 371f6913e7
2 changed files with 7 additions and 1 deletions
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6
src/gb/io.c
View File

@ -329,6 +329,7 @@ void GBIOWrite(struct GB* gb, unsigned address, uint8_t value) {
case REG_BCPS:
gb->video.bcpIndex = value & 0x3F;
gb->video.bcpIncrement = value & 0x80;
gb->memory.io[REG_BCPD] = gb->video.palette[gb->video.bcpIndex >> 1];
break;
case REG_BCPD:
GBVideoProcessDots(&gb->video);
@ -337,6 +338,7 @@ void GBIOWrite(struct GB* gb, unsigned address, uint8_t value) {
case REG_OCPS:
gb->video.ocpIndex = value & 0x3F;
gb->video.ocpIncrement = value & 0x80;
gb->memory.io[REG_OCPD] = gb->video.palette[8 * 4 + (gb->video.ocpIndex >> 1)];
break;
case REG_OCPD:
GBVideoProcessDots(&gb->video);
@ -453,14 +455,16 @@ uint8_t GBIORead(struct GB* gb, unsigned address) {
default:
if (gb->model >= GB_MODEL_CGB) {
switch (address) {
case REG_KEY1:
case REG_VBK:
case REG_HDMA1:
case REG_HDMA2:
case REG_HDMA3:
case REG_HDMA4:
case REG_HDMA5:
case REG_BCPD:
case REG_OCPD:
case REG_SVBK:
case REG_KEY1:
// Handled transparently by the registers
goto success;
default:

2
src/gb/video.c
View File

@ -314,6 +314,7 @@ void GBVideoWritePalette(struct GBVideo* video, uint16_t address, uint8_t value)
if (video->bcpIncrement) {
++video->bcpIndex;
video->bcpIndex &= 0x3F;
video->p->memory.io[REG_BCPD] = video->palette[video->bcpIndex >> 1];
}
break;
case REG_OCPD:
@ -328,6 +329,7 @@ void GBVideoWritePalette(struct GBVideo* video, uint16_t address, uint8_t value)
if (video->ocpIncrement) {
++video->ocpIndex;
video->ocpIndex &= 0x3F;
video->p->memory.io[REG_OCPD] = video->palette[8 * 4 + (video->ocpIndex >> 1)];
}
break;
}