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Minor bugfixes

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ROMINIT sets ROMID to 'unknown', allows ROMSELECT optimisation to work.
Bugfix to BUFREM in audio.s
This commit is contained in:
jgharston 2022-10-19 15:38:17 +01:00 committed by GitHub
parent e9ef2f2e27
commit 9d55776cb3
2 changed files with 7 additions and 3 deletions
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4
auxmem.misc.s
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@ -371,7 +371,9 @@ ROMINIT STZ MAXROM ; One sideways ROM only
:X1 CMP #7
BNE :X2
STA MAXROM
:X2 RTS
:X2 LDA #$FF
STA ROMID ; Ensure invalid initial value
RTS
**********************************************************

6
mainmem.audio.s
View File

@ -176,9 +176,10 @@ MAININS >>> ENTMAIN
* Remove value from buffer or examine buffer (API same as Acorn MOS REMV)
* NOTE OS1.20 has a bug in the EXAMINE path
* On entry: X is buffer number, V=1 if only examination is requested
* On exit: If examination, A next byte, X preserved, Y=offset to next char
* If removal, A undef, X preserved, Y value of byte removed
* On exit: If examination, A next byte, X preserved, Y=next byte
* If removal, A undef, X preserved, Y=value of byte removed
* If buffer already empty C=1, else C=0
REM PHP ; Save flags, turn off interrupts
SEI
@ -201,6 +202,7 @@ REM PHP ; Save flags, turn off interrupts
CLC ; Success
RTS
:EXAM PLA ; Char read from buffer
TAY ; BUGFIX: Omitted on OS1.20
PLP
CLC ; Success
RTS