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Add note about C2P bug

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Joshua Bell 2021-11-10 21:37:52 -08:00
parent 321c116788
commit 2ee53bf4ae
1 changed files with 8 additions and 0 deletions
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ace2000_c300_cfff.s
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@ -666,6 +666,14 @@ LC8B4: jsr CheckPauseListing
;; If MouseText is not active, make sure to map inverse
;; uppercase range to the control character range.
;; BUG: If a char in $00-$7F is passed to C3COut1 and
;; not in inverse mode, the mapping will not occur. This
;; does not happen with the Apple firmware, as the
;; high bit is folded into the char based on INVFLAG,
;; then the corresponding test is based only on the
;; char's high bit. This affects Copy II Plus 8.4's
;; Catalog / tree view.
@l2: lda CHAR ; char to be printed
bit INVFLG ; inverse?
bmi @l3 ; no, so not MT, just print it