SRAM 64Kb REVISED

USD $24.99

Memory and Delay Line Replacement for Atari 8-bit computers.

5 in stock

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SKU: SRAM64R Categories: ,

Description

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.

SRAM 64Kb REVISED

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. 

 

  • 800XL

 

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

Disclaimer: 

  • 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. 

Additional information

Weight 1 oz
Dimensions 1 × 2 × .5 in

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