[stella] 8K Cart question

Subject: [stella] 8K Cart question
From: Chad Schell <gamer@xxxxxxxxxxx>
Date: Fri, 03 Nov 2000 10:39:50 -0800


I have a quick sanity check I'd like to ask the list concerning building 8K carts using the F8 bankswitching scheme.

To build the cart using a PLD and an eprom, shouldn't the following setup be sufficient:

Eprom Data lines connected to 2600 data bus.
Eprom A0  (Address 0) through A11 connected to 2600 A0-A11.

PLD Generates Eprom OE and A12 as follows:

OE is active (low) when Atari 2600 A12  is high.
Eprom A12 is a flip flop with the following set and reset conditions:
        Set  when 2600 A12-A0 = 1FF9
        Clear when 2600 A12-A0 = 1FF8


-- Archives (includes files) at http://www.biglist.com/lists/stella/archives/ Unsub & more at http://www.biglist.com/lists/stella/

Current Thread