emu_nes

commit ebdf50cdf3a357a0e37a5751fd9d78ae975979a0
parent 454276a50c5843e3401f9bc54d80cb7dda40b782
Author: vin <git@vineetk.net>
Date:   Mon, 10 Jun 2024 12:55:40 +0530

implement tay, txa, tya

Diffstat:
M
cpu.c
 | 
15
++++++++++++---

1 file changed, 12 insertions(+), 3 deletions(-)
diff --git a/cpu.c b/cpu.c
@@ -588,7 +588,10 @@ tax(void)
 static void
 tay(uint8_t arg)
 {
-/* TODO: complete this */
+	regs.y = regs.a;
+
+	STATUS_UPDATE_ZERO(regs.y);
+	STATUS_UPDATE_NEGATIVE(regs.y);
 }
 
 static void
@@ -600,7 +603,10 @@ tsx(uint8_t arg)
 static void
 txa(uint8_t arg)
 {
-/* TODO: complete this */
+	regs.a = regs.x;
+
+	STATUS_UPDATE_ZERO(regs.a);
+	STATUS_UPDATE_NEGATIVE(regs.a);
 }
 
 static void
@@ -612,7 +618,10 @@ txs(uint8_t arg)
 static void
 tya(uint8_t arg)
 {
-/* TODO: complete this */
+	regs.a = regs.y;
+
+	STATUS_UPDATE_ZERO(regs.a);
+	STATUS_UPDATE_NEGATIVE(regs.a);
 }
 
 static void