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Commodore 1571 firmware
Macros for WD1770

        .subttl 'wd1770.src'
	.page
wdtest  .macro  
	.ife <*!.$03	; lower two bits cannot be zero
	nop		; fill address error
	.endif	
	.endm

nodrrd  .macro		; read nodrv,x absolute
	.byte $bd,$ff,$00
	.endm

nodrwr  .macro		; write nodrv,x absolute
	.byte $9d,$ff,$00
	.endm


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This page has been created by Sami Rautiainen.
Read the small print. Last updated August 27, 1998.