RE: [Fwd: Diagnostic cartridges]

From: Marko Mäkelä (Marko.Makela_at_HUT.FI)
Date: 2002-01-29 10:38:57

Hello Nick,

On Tue, 29 Jan 2002 wrote:

> The C64 cartridge is indeed the one I got late last year. It was made by
> HESware. I modified the code and installed the ROMs into a SuperGames cart
> to allow it to boot in either EXROM or in Ultimax mode should the C64 have a
> bad ROM. 

What was the code you added?  Just a simple $100-$1ff memory test and
then a jump to ($8000), where the cartridge would also be mapped?  I
guess the cartridge will then complain about the KERNAL and BASIC ROMs
and any RAM above $1000, as they are not available in the UltiMax
configuration.  There are 1014 $aa bytes at the end of the 8k ROM,
which is pretty much space for additions.


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