rom4x/rom5x/B1_C53D_patch_out_rom_cksum.s

; Patch the Apple IIc+ diagnostics to skip the ROM checksum test.
; We should really examine the routine at $D249 in the aux firmware
; to see if we can calculate a new checksum.
; the $D249 routine copies a small routine into the zero page that
; calculates the checksum.  It returns with carry set = error and
; carry clear = OK.  So we just patch the JSR to always clear the
; carry.  For now.
.code
	.org $C53D
	nop
	nop
	clc
Update code comments and Rakefile 2017-03-11 00:19:40 -08:00			`; Patch the Apple IIc+ diagnostics to skip the ROM checksum test.`
			`; We should really examine the routine at $D249 in the aux firmware`
			`; to see if we can calculate a new checksum.`
			`; the $D249 routine copies a small routine into the zero page that`
			`; calculates the checksum. It returns with carry set = error and`
			`; carry clear = OK. So we just patch the JSR to always clear the`
			`; carry. For now.`
conversion to cc65 2017-03-18 20:00:43 -07:00			`.code`
			`.org $C53D`
Update code comments and Rakefile 2017-03-11 00:19:40 -08:00			`nop`
			`nop`
			`clc`