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/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