Re: [stella] EEPROM or FLASH for Bankswitching PCBs

Subject: Re: [stella] EEPROM or FLASH for Bankswitching PCBs
From: Joe Grand <joe@xxxxxxxxxxxxxx>
Date: Sat, 26 Apr 2003 14:02:35 -0400
You would want to use an EEPROM that is pin-compatible so you can drop it straight in. I would suggest picking up a 28C64 EEPROM device, like the Atmel AT28C64B-15PC. You can buy them at DigiKey ( though they are slightly more costly than standard UV EPROMs ($4.30 each, less in quantity).

Just to clarify, a 2764 EPROM is 8K, not 16K. If you wanted 16K, you would use a 27128 EPROM (or a 28C128 EEPROM, which DigiKey doesn't carry). And, if you wanted 32K, you would use a 27256 EPROM (or a 28C256 EEPROM, which can get quite expensive).

Using a EEPROM like this would definetely make the development cycle a little easier, since you don't have to wait for the EPROMs to be erased, which can sometimes take over 20 minutes. EEPROM can simply be erased and reprogrammed right away.

Hope that helps,

Pixels Past
Atari 2600 SCSIcide

At 01:39 PM 4/26/2003, Zach Matley wrote:
Very cool Albert. Thanks.

Can anyone suggest an EEPROM or Flash Memory that can substitute for a
2764 EPROM in a 16K board? "Combat: Tank AI" isn't going to be 4K for much
longer. If anyone knows the model number, that would be terrific.


On Sat, 26 Apr 2003, Albert Yarusso wrote:

> AtariAge and Pixels Past are proud to announce the availability of new
> 8K/16K/32K bankswitching PCBs for the Atari 2600.  These new boards are
> available now in the AtariAge store and can be ordered in several
> configurations:

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