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fixed lyc interrupt when lyc = 0

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This commit is contained in:
Samuel Walker 2025-02-19 07:34:36 -07:00
parent c8ec44fa39
commit 2ab09f9b4c
2 changed files with 10 additions and 3 deletions
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4
lib/lcd.c
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@ -59,11 +59,11 @@ void lcd_write(u16 address, u8 value) {
p[offset] = value; p[offset] = value;
if(offset == 2) { if(offset == 2) {
printf("YScroll: %02X\n", value); //printf("YScroll: %02X\n", value);
} }
if(offset == 0xA) { if(offset == 0xA) {
printf("WinY: %02X\n", value); //printf("WinY: %02X\n", value);
} }
if(offset == 6) { if(offset == 6) {

9
lib/ppu_sm.c
View File

@ -17,7 +17,6 @@ void increment_ly() {
if(lcd_get_context()->ly == lcd_get_context()->ly_compare) { if(lcd_get_context()->ly == lcd_get_context()->ly_compare) {
LCDS_LYC_SET(1); LCDS_LYC_SET(1);
if(LCDS_STAT_INT(SS_LYC)) { if(LCDS_STAT_INT(SS_LYC)) {
cpu_request_interrupt(IT_LCD_STAT); cpu_request_interrupt(IT_LCD_STAT);
} }
@ -128,6 +127,14 @@ void ppu_mode_vblank() {
cpu_request_interrupt(IT_LCD_STAT); cpu_request_interrupt(IT_LCD_STAT);
} }
lcd_get_context()->ly = 0; lcd_get_context()->ly = 0;
if(lcd_get_context()->ly == lcd_get_context()->ly_compare) {
LCDS_LYC_SET(1);
if(LCDS_STAT_INT(SS_LYC)) {
cpu_request_interrupt(IT_LCD_STAT);
}
} else {
LCDS_LYC_SET(0);
}
ppu_get_context()->window_line = 0; ppu_get_context()->window_line = 0;
} }