Hi everyone,
I wired up a little 2k/4k multicart that uses a 74LS04 for a CE hex inverter.
It works with the AMD 29F010A-90PC and with some minor wiring changes, the smaller Atmel 28C64-15PC However, it will NOT work with the Atmel 29C010A-12PC and I've tried several. Sometimes I get a glimpse of the game screen before it blanks out. An older post http://atariage.com/forums/topic/21851-2732-eeprom-and-problem-with-6-switch-atari/?do=findComment&comment=240804 describes a similar problem (though I have a 4 switcher) and he solved it by using a 7406 inverter. Before I take a chance on that inverter does anyone know what might be causing this problem?
I'm trying to understand why it would effect the 120ns chip but not the 90 or 150? I really would like to use these chips since I have a few lying around.
Many thanks.