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Address code review comments
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@ -305,7 +305,7 @@ SER_CLOSE:
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stx Opened ; Mark port as closed
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cli
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: txa
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: txa ; Promote char return value
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rts
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;----------------------------------------------------------------------------
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@ -313,13 +313,17 @@ SER_CLOSE:
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; Must return an SER_ERR_xx code in a/x.
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SER_OPEN:
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bit $C082 ; Check if this is a IIgs
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; Check if this is a IIgs (Apple II Miscellaneous TechNote #7,
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; Apple II Family Identification)
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sec
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jsr $FE1F ; https://prodos8.com/docs/technote/misc/07/
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bit $C082
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jsr $FE1F
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bit $C080
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bcc IIgs
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bit $C080
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lda #SER_ERR_NO_DEVICE ; Not a IIgs
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SetupErrOut:
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cli
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ldx #$00 ; Promote char return value
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@ -327,8 +331,7 @@ SetupErrOut:
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rts
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IIgs:
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bit $C080
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sei ; Disable interrupts
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sei
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; Check if the handshake setting is valid
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ldy #SER_PARAMS::HANDSHAKE ; Handshake
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