Re: [stella] Supercharger strangeness

Subject: Re: [stella] Supercharger strangeness
From: Glenn Saunders <cybpunks@xxxxxxxxxxxxx>
Date: Sat, 05 Aug 2000 11:20:43 -0700
At 01:10 PM 8/5/2000 +0200, you wrote:
When SC writing is enabled, an access to an address in the $F0xx page
might trigger a write to an address a couple of address changes later.
If you execute the bankswitching code in the $F0xx page, accesses to
$FFF8 will take the value to be written from the last address that was
accessed in $F0xx. So depending on which address you put the STA $FFF8 at,
the last fetch when the processor reads that instuction might be on
an address which has the bits set for a working bankswitching/write-enable
value or not. In general it's best not to execute any code at $F0xx while
SC writing is enabled.

You can't turn SC writing off in software can you? I was just wondering whether that indeed means that that entire 256 byte chunk of memory can't be used for anything useful when using SC RAM as RAM.

Glenn Saunders - Producer - Cyberpunks Entertainment Personal homepage: Cyberpunks Entertainment:

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