Re: MS-DOS 3.30 boot on the CBM-II

From: Michał Pleban <*lists_at_michau.name*> Date: Sun, 05 Nov 2017 18:43:48 +0100 Message-ID: <59FF4DD4.2040906@michau.name> · lists_at_michau.name

Ruud@Baltissen.org wrote:

> I have a source that has been altered a bit so it runs under NASM. 

That is very good, thank you! It will be invaluable in writing the ROM code.

> When comparing the original with the resulting BIN, the eight 
> different are caused by the fact that NASM gives certain 
> instructions other codes than for example TASM. 

But are all the instruction lengths the same? This is crucial because
INT 08 vector is hardcoded in MS-DOS 1.25 at F000:F1E2.

Regards,
Michau.

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