git.y1.nz

commit b947dd277e6d12b889112f1c8661941dc7ed314d
parent 0bff2fcdb83caaac7bebce7e69160642dfca7a8f
Author: Toxa <56631470+untoxa@users.noreply.github.com>
Date:   Sat, 16 Sep 2023 19:34:55 +0300

Merge pull request #579 from michel-iwaniec/clear_stackpage_at_reset

NES vram transfer buffer bugfix: Make sure to clear stack page on reset
Diffstat:
M
gbdk-lib/libc/targets/mos6502/nes/crt0.s
8
++++----

1 file changed, 4 insertions(+), 4 deletions(-)
diff --git a/gbdk-lib/libc/targets/mos6502/nes/crt0.s b/gbdk-lib/libc/targets/mos6502/nes/crt0.s
@@ -342,12 +342,12 @@ __crt0_waitPPU_loop:
     bpl __crt0_waitPPU_loop
     rts
 
-__crt0_clearRAM:
+.macro CRT0_CLEAR_RAM
     ldx #0x00
     txa
 __crt0_clearRAM_loop:
     sta 0x0000,x
-    ;sta 0x0100,x
+    sta 0x0100,x
     sta 0x0200,x
     sta 0x0300,x
     sta 0x0400,x
@@ -356,7 +356,7 @@ __crt0_clearRAM_loop:
     sta 0x0700,x
     inx
     bne __crt0_clearRAM_loop
-    rts
+.endm
 
 __crt0_clearVRAM:
     lda #0x00
@@ -400,7 +400,7 @@ __crt0_RESET_bankSwitchValue:
     jsr __crt0_waitPPU
     jsr __crt0_waitPPU
     ; Clear RAM and VRAM
-    jsr __crt0_clearRAM
+    CRT0_CLEAR_RAM
     jsr __crt0_clearVRAM
     ; Hide sprites in shadow OAM, and perform OAM DMA
     ldx #0

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