c65 target: conio accesses all color RAM in 80x25 text mode

2025-11-18 00:36:10 -08:00
parent 640206696f
commit 18e9c6f6a0
2 changed files with 20 additions and 0 deletions
--- a/libsrc/c65/cpeekcolor.s
+++ b/libsrc/c65/cpeekcolor.s
@@ -18,8 +18,19 @@ _cpeekcolor:
        lda     SCREEN_PTR
        sta     ptr1

+        php
+        sei
+        lda     $d030
+        ora     #$01
+        sta     $d030
        ldy     #0
        lda     (ptr1),y
+        tay
+        lda     $d030
+        and     #$fe
+        sta     $d030
+        plp
+        tya

        ldx     #>$0000
        rts
--- a/libsrc/c65/cputc.s
+++ b/libsrc/c65/cputc.s
@@ -116,7 +116,16 @@ putchar:
        adc     #>$d000
        sta     ptr4 + 1

+        php
+        sei
+        lda     $d030
+        ora     #$01
+        sta     $d030
        lda     CHARCOLOR
        sta     (ptr4),y    ; Set color
+        lda     $d030
+        and     #$fe
+        sta     $d030
+        plp

        rts