syntax error while calling 1541 U1: command from ML

[ccureau]

Hi, everyone! Looks like I'm one of the first posts...no one else needs help?

I'm pulling my hair out with this code. Its intended to run from the internal function ROM in the C128 and is trying to dump track 18, sector 1 to the screen as a proof of concept. The problem with this is that the drive reports a syntax error. Trouble is, I can't figure out why! I've tried both the B-R and U1 commands, but nothing seems to work.

I'm developing this code with the cc65 tools, just in case it matters.

Any ideas?

Code: Select all

;
; The BOOT ROM for c128 - version 0.1
;
; Note: This version is to be used as Option ROM
; starting from $8000 onwards on a c128!
;
;
; disk access routines adapted from original Commodore CP/M code
; http://www.z80.eu/c64/BOOT65.ASM

SETLFS = $ffba
SETNAM = $ffbd
OPEN = $ffc0
CHKIN = $ffc6
CKOUT = $ffc9
CLRCH = $ffcc
BASIN = $ffcf
BSOUT = $ffd2
CLALL = $ffe7
LOADADR = $1c01

	.org $8000

; c128 Option ROM trickery

	jmp start_code     	;Cold start vector
	jmp start_code     	;Warm start vector
	.byte $FF          	;> $01 for Autostart
	.byte $43,$42,$4d  	;"CBM"
	.byte $00,$00,$00  	;padding (easier on the eyes)


start_code:
	lda #6		 	;Kernal and Internal ROM (LOW), RAM(0), I/O
	sta $d501	 	;write to preconfiguration register A
	sta $ff01	 	;write to LCR A
	sei		 	;disable interrupts
	jsr CLALL	 	;close all files and channels

;	 set up command channel
	lda #15		 	;logical file number 15
	ldx #8		 	;device 8
	ldy #15		 	;secondary address 15
	jsr SETLFS	 	;set LA, FA, SA
	lda #0		 	;zero length file name
	jsr SETNAM
	jsr OPEN	 	;open command channel

;	 set up for random access
	lda #5		 ;logical file number 5
	ldx #8		 ;device 8
	ldy #5		 ;secondary address 5
	jsr SETLFS	 ;set LA, FA, SA
	lda #1		 ;single character file name
	ldx #<buffer
	ldy #>buffer	 ;set file name
	jsr SETNAM
	jsr OPEN	 ;open command channel

;	 grab info from Track 1, Sector 0 (block-read)
	ldx #15	 	;15 is active channel out
	jsr CKOUT
	ldx #0
	ldy #13		 ;length of file name (11 characters)
fname:
	lda drivecmd,x	 ;pointer to file name
	jsr BSOUT	 ;output to channel
	inx
	dey
	bne fname	 ;loop to finish sending filename
	jsr CLRCH	 ;restore default channel
	ldx #5		 ;set 5 as active channel in
	jsr CHKIN	
	ldx #0
rdloop:
	jsr BASIN	 ;input from channel
rl1:
	sta $0400,x	 ;put to screen
	inx
	bne rdloop	 ;read 256 bytes
	jsr CLRCH	 ;restore default channel
	;jsr CLALL	 ;close all channels
	brk
; data
buffer:
	.byte "#"
drivecmd:
	.byte "u1: 5 0 18 1", $0D
readcnt:
	.byte 0

[jeeek]

I'm pulling my hair out with this code. Its intended to run from the internal function ROM in the C128 and is trying to dump track 18, sector 1 to the screen as a proof of concept. The problem with this is that the drive reports a syntax error. Trouble is, I can't figure out why! I've tried both the B-R and U1 commands, but nothing seems to work.

I'm developing this code with the cc65 tools, just in case it matters.

Any ideas?

Code: Select all

drivecmd:
	.byte "u1: 5 0 18 1", $0D

Just doing a little bit of grave digging ...

Maybe this has been already found out, put no posted anymore ...

It's probably a case problem ... if you try to call the assembler with the -l option you may find it in the created .lst file. "u1" is lower case which produces hex "$75" for "u", but we need "U1" (hex $55 for "U")!