RE: Three versions of C64 source files

From: Baltissen, GJPAA (Ruud) <>
Date: Mon, 1 Dec 2014 08:16:26 +0000
Message-ID: <>
Hallo Patryk,

> ... Similar to what we did with the 1520 firmware.

Then I wonder how you managed that. I at least managed to create a version that can be compiled by both CA65 and 64tass. But at a price :( Both CA65 and XA accept the next line:

	D_A09E:		.byte "EN", 'D'+$80	; END		$80		128

64tass didn't, I had to convert it to:

	D_A09E:		.byte "EN"
	.byte $C4				; END		$80		128

As you can see 64tass doesn't accept the + construction. As you can see, I also found out that XA accepts '.byte' as well.
But I can imagine that the 1520 has no text inside its ROM so probably no one noticed.

Then XA didn't accept next line:

	D_A144:		.byte '^'+$80		; ^		$AE		174

Just this one, the other lines with arithmetic functions (+, -, / etc.) were no problem.

The next problem is the directive that tells the compiler where the binary starts: '*= $8000' for XA, '.org $8000' for both CA65 and 64tass. I tried but one doesn't accept the directive of the other(s). So that's why I wonder how you did it.

Any comment is welcome!

Met vriendelijke groet, 
Ruud Baltissen

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Received on 2014-12-01 09:00:03

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