Re: PET kernal routines

From: smf <*smf_at_null.net*> Date: Thu, 13 Apr 2017 19:49:17 +0100 Message-ID: <6f04f834-f6e3-0038-43fa-d2ee78a6db1d@null.net> · smf_at_null.net

It looks like 04F2 is part of the cassette loaded TIM, while FFD2 is in 
the kernal rom.

If you don't have the routine in the version of TIM you have then 
something like this might do it:

04F2:
LDA #$0d
JSR $FFD2
RTS

You could of course put it wherever you want. You might need to call 
FFD2 with $0a as well, but I have a feeling that $0d was enough.

On 13/04/2017 14:04, Paul Schmidt wrote:
> ogram. The Upgrade ROM
> version of the PET memory map shows that area of memory being unused and
> available for RAM expansion. And it seems odd that for a 'tiny' monitor
> program, two of its internal routines would be so widely spaced in memory at
> $04F2 and $FFD2.

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