Memory and Delay Line Replacement for Atari 8-bit computers.
SRAM MODULE is my first step to help ATARI owners to repair their computers home, as in most of the cases faulty is dynamic ram
- replaces base ram of 64KB in all 8bit ATARI
- replaces broken DELAY LINE chip in XL computers and many more ICs – refer to schematics down the page
- upgrades ram in 600XL to 64KB
- PCB thickness is 0,8mm
Step by step:
- REMOVE old RAM CHIPS ( hint: not necessary actually; if your ram does not get hot, you can remove resistors on data lines to ram and keep ram chips intact)
- install SRAM MODULE under the MAIN CPU; insert CPU to SRAM MODULE
- Connect CI point at SRAM module to CAS_INHIBIT SIGNAL (for example MMU pin 16)
- EXT – connection to Extension Select is not needed to resurrect Atari, but some upgrades may be needed: Rapidus or connected to PBI. Please, refer to the schematic of your computer.
- PIN 1 is below EXT hole; bottom left at below picture.
Hint – A handy article https://www.evilmadscientist.com/2010/basics-finding-pin-1/ if you do not know how to identify pin 1 in chips. PIN 1 always goes to Pin 1
SRAM MODULE COMPLETELY REPLACES the below parts that can be actually eliminated now.
- XE ( and the majority of Freddy chip, they can be now replaced even with clk_divider built upon TTL 74)
- If you are not familiar with soldering do not have proper tools or do not understand STEP BY STEP instructions please LET a pro technician do it for you.
- Please remember – wrong tool usage or low skills may damage Atari.
- Any damage/harm to your hardware is NOT subject to any kind of warranty.
- Installation is very easy, but inexperienced hands can do a lot of damage.