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SRAM 64Kb


 

Replaced with ATARI SRAM REVISED

 

 

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

 

Inside BOX:

  • SRAM MODULE

 

Disclaimer: 

  • If you:
    • are not familiar with soldering
    • do not have proper tools
    • do not understand STEP BY STEP instructions 

          please LET a pro technician do it for you or send me your ATARI BOARD for installation. Upgrade installation cost            is 10€ only. Contact me to arrange installation.

  • Please remeber - wrong tools usage or low skills may damage atari 
  • Any damage / harm to your hardware is NOT subject of any kind of warranty.
  • Installation is very easy, but unexperienced hands can do a lot of damage. Please, do not ask me questions WHAT HAVE I DONE WRONG WITH INSTALLATION - answer will be always the same -

 

I DO NOT KNOW

 

 

Step by step: 

  • REMOVE old RAM CHIPS ( hint: not necessary actaully; if Your ram do not get hot, You can remove resistors on data lines to ram and keep ram chips intact) 
  • install  SRAM MODULE under MAIN CPU; insert CPU to SRAM MODULE
  • Connect  LSP1 point at sram module  to  CAS_INHIBIT SIGNAL (for example MMU pin 16)
  • ready :-)

 

ps. 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 COMPLETLY REPLACES below parts that can be actually eminated now. 

 

  • 800XL

 

  • XE ( and majority of freddy chip, than can be now  replaced even with clk_divider built upon TTL 74)

 


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