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GB IO: Fill in more registers

This commit is contained in:
Jeffrey Pfau 2016-02-05 21:19:26 -08:00
parent c60251de73
commit 385059c63a
1 changed files with 46 additions and 34 deletions
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80
src/gb/io.c
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@ -9,7 +9,9 @@
mLOG_DEFINE_CATEGORY(GB_IO, "GB I/O"); mLOG_DEFINE_CATEGORY(GB_IO, "GB I/O");
const static uint8_t _registerMask[0x50] = { const static uint8_t _registerMask[] = {
[REG_SC] = 0x7E, // TODO: GBC differences
[REG_IF] = 0xE0,
[REG_TAC] = 0xF8, [REG_TAC] = 0xF8,
[REG_NR10] = 0x80, [REG_NR10] = 0x80,
[REG_NR11] = 0x3F, [REG_NR11] = 0x3F,
@ -33,6 +35,7 @@ const static uint8_t _registerMask[0x50] = {
[REG_NR51] = 0x00, [REG_NR51] = 0x00,
[REG_NR52] = 0x70, [REG_NR52] = 0x70,
[REG_STAT] = 0x80, [REG_STAT] = 0x80,
[REG_IE] = 0xE0,
}; };
void GBIOInit(struct GB* gb) { void GBIOInit(struct GB* gb) {
@ -42,38 +45,39 @@ void GBIOInit(struct GB* gb) {
void GBIOReset(struct GB* gb) { void GBIOReset(struct GB* gb) {
memset(gb->memory.io, 0, sizeof(gb->memory.io)); memset(gb->memory.io, 0, sizeof(gb->memory.io));
GBIOWrite(gb, 0x05, 0); GBIOWrite(gb, REG_TIMA, 0);
GBIOWrite(gb, 0x06, 0); GBIOWrite(gb, REG_TMA, 0);
GBIOWrite(gb, 0x07, 0); GBIOWrite(gb, REG_TAC, 0);
GBIOWrite(gb, 0x10, 0x80); GBIOWrite(gb, REG_IF, 1);
GBIOWrite(gb, 0x11, 0xBF); GBIOWrite(gb, REG_NR52, 0xF1);
GBIOWrite(gb, 0x12, 0xF3); GBIOWrite(gb, REG_NR10, 0x80);
GBIOWrite(gb, 0x12, 0xF3); GBIOWrite(gb, REG_NR11, 0xBF);
GBIOWrite(gb, 0x14, 0xBF); GBIOWrite(gb, REG_NR12, 0xF3);
GBIOWrite(gb, 0x16, 0x3F); GBIOWrite(gb, REG_NR13, 0xF3);
GBIOWrite(gb, 0x17, 0x00); GBIOWrite(gb, REG_NR14, 0xBF);
GBIOWrite(gb, 0x19, 0xBF); GBIOWrite(gb, REG_NR21, 0x3F);
GBIOWrite(gb, 0x1A, 0x7F); GBIOWrite(gb, REG_NR22, 0x00);
GBIOWrite(gb, 0x1B, 0xFF); GBIOWrite(gb, REG_NR24, 0xBF);
GBIOWrite(gb, 0x1C, 0x9F); GBIOWrite(gb, REG_NR30, 0x7F);
GBIOWrite(gb, 0x1E, 0xBF); GBIOWrite(gb, REG_NR31, 0xFF);
GBIOWrite(gb, 0x20, 0xFF); GBIOWrite(gb, REG_NR32, 0x9F);
GBIOWrite(gb, 0x21, 0x00); GBIOWrite(gb, REG_NR34, 0xBF);
GBIOWrite(gb, 0x22, 0x00); GBIOWrite(gb, REG_NR41, 0xFF);
GBIOWrite(gb, 0x23, 0xBF); GBIOWrite(gb, REG_NR42, 0x00);
GBIOWrite(gb, 0x24, 0x77); GBIOWrite(gb, REG_NR43, 0x00);
GBIOWrite(gb, 0x25, 0xF3); GBIOWrite(gb, REG_NR44, 0xBF);
GBIOWrite(gb, 0x26, 0xF1); GBIOWrite(gb, REG_NR50, 0x77);
GBIOWrite(gb, 0x40, 0x91); GBIOWrite(gb, REG_NR51, 0xF3);
GBIOWrite(gb, 0x42, 0x00); GBIOWrite(gb, REG_LCDC, 0x91);
GBIOWrite(gb, 0x43, 0x00); GBIOWrite(gb, REG_SCY, 0x00);
GBIOWrite(gb, 0x45, 0x00); GBIOWrite(gb, REG_SCX, 0x00);
GBIOWrite(gb, 0x47, 0xFC); GBIOWrite(gb, REG_LYC, 0x00);
GBIOWrite(gb, 0x48, 0xFF); GBIOWrite(gb, REG_BGP, 0xFC);
GBIOWrite(gb, 0x49, 0xFF); GBIOWrite(gb, REG_OBP0, 0xFF);
GBIOWrite(gb, 0x4A, 0x00); GBIOWrite(gb, REG_OBP1, 0xFF);
GBIOWrite(gb, 0x4B, 0x00); GBIOWrite(gb, REG_WY, 0x00);
GBIOWrite(gb, 0xFF, 0x00); GBIOWrite(gb, REG_WX, 0x00);
GBIOWrite(gb, REG_IE, 0x00);
} }
void GBIOWrite(struct GB* gb, unsigned address, uint8_t value) { void GBIOWrite(struct GB* gb, unsigned address, uint8_t value) {
@ -311,10 +315,13 @@ uint8_t GBIORead(struct GB* gb, unsigned address) {
switch (address) { switch (address) {
case REG_JOYP: case REG_JOYP:
return _readKeys(gb); return _readKeys(gb);
case REG_IF: case REG_SB:
case REG_SC:
// TODO
break; break;
case REG_IE: case REG_IE:
return gb->memory.ie; return gb->memory.ie;
case REG_IF:
case REG_NR10: case REG_NR10:
case REG_NR11: case REG_NR11:
case REG_NR12: case REG_NR12:
@ -358,6 +365,11 @@ uint8_t GBIORead(struct GB* gb, unsigned address) {
case REG_SCX: case REG_SCX:
case REG_LY: case REG_LY:
case REG_LYC: case REG_LYC:
case REG_BGP:
case REG_OBP0:
case REG_OBP1:
case REG_WY:
case REG_WX:
// Handled transparently by the registers // Handled transparently by the registers
break; break;
default: default: