Re: [cc65] Why does this work in 128 mode but not 64 mode?

On 2010-04-30, at 15:07, Payton Byrd wrote:
>
>
> What is the correct way to determine if a drive exists on the IEC bus?

I am not sure if this is "the correct" way but I've been doing  
something like:

check_device:
	tax
	jsr open_status_channel
	bcs error_checking_device

	ldx #$0f
	jsr CHKOUT
	bcs error_checking_device
	lda #'U'
	jsr CHROUT
	lda #'I'
	jsr CHROUT
	lda #$0d
	jsr CHROUT
	jsr CLRCHN
	lda #< status_message_buffer
	ldy #> status_message_buffer
	sec
	jsr read_status_channel
	jsr close_status_channel
	jmp recognise_identity_string	

error_checking_device:
	jsr close_status_channel
	jsr CLRCHN
	lda #$00
	tax
	sta status_message_buffer,x
	rts


-- 
SD!
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