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Do the IIgs check as documented

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Colin Leroy-Mira 2023-10-11 08:47:45 +02:00 committed by Oliver Schmidt
parent e3759a3ead
commit 39d6080945
1 changed files with 5 additions and 6 deletions
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11
libsrc/apple2/ser/a2.gs.s
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@ -314,20 +314,19 @@ SER_CLOSE:
SER_OPEN:
bit $C082 ; Check if this is a IIgs
lda $FE1F ; https://prodos8.com/docs/technote/misc/07/
cmp #$60 ; Everything but the IIgs has an RTS there
bne HardwareFound
sec
jsr $FE1F ; https://prodos8.com/docs/technote/misc/07/
bcc IIgs
; Device (hardware) not found
bit $C080
lda #SER_ERR_NO_DEVICE
lda #SER_ERR_NO_DEVICE ; Not a IIgs
SetupErrOut:
cli
ldx #$00 ; Promote char return value
stx Opened ; Mark port closed
rts
HardwareFound:
IIgs:
bit $C080
sei ; Disable interrupts