Ah, the quintessential 64k machine, Apple could only get to 48K back then

-----Original Message-----
From: owner-cbm-hackers@ling.gu.se [mailto:owner-cbm-hackers@ling.gu.se] On Behalf Of William Levak
Sent: Friday, March 27, 2009 8:15 PM
To: CBM Hackers
Subject: Re: Additional cartridge ROM question

On Tue, 24 Mar 2009, Jim Brain wrote:

> But, if EXROM and GAME are LOW, but HIRAM and LORAM are low as well, do I get
> RAM at the two 8K locations, or does EXROM and GAME override any LORAM/HIRAM
> settings?

If EXROM, GAME, HIRAM, and LORAM are low, all access ($000-FFFF) is RAM,
with the VIC chip seeing the Character ROM at $1000-1FFF and $9000-9FFF
and RAM everywhere else.



wlevak@sdf.lonestar.org
SDF Public Access UNIX System - http://sdf.lonestar.org

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