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Fixed off-by-one-error on upper bound of invalid screen memory locations

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This commit is contained in:
mc78 2024-08-26 02:03:29 +02:00
parent c5f3a7e690
commit a914be0fdc
1 changed files with 2 additions and 2 deletions

4
libsrc/cbm/workingscreenaddr.s

@ -15,12 +15,12 @@ _cbm_set_working_screen:
bne @error
cpx #$10 ; Screen addr must not be set to $1000-$1fff nor $9000-$9fff
bcc @ok_1000
cpx #$1f
cpx #$20
bcc @error
@ok_1000:
cpx #$90 ; Screen addr must not be set to $1000-$1fff nor $9000-$9fff
bcc @ok_9000
cpx #$9f
cpx #$a0
bcc @error
@ok_9000:
stx SCREEN_HI