Mehridian Sanders #1 Posted December 27, 2019 Pic 1 is my 99/4a Pic 2 is a board I recognized immediately.Although there are differences. Thoughts? Board 2 has the ram yanked from their cradles. The Main Chip is 15595 Board 1 has intact Ram and the Main Chip is 12706 Sent from my SM-G955U using Tapatalk Quote Share this post Link to post Share on other sites
Mehridian Sanders #2 Posted December 27, 2019 Board 2 also has the crystal broken offSent from my SM-G955U using Tapatalk Quote Share this post Link to post Share on other sites
Mehridian Sanders #3 Posted December 27, 2019 Correction: Not RamSent from my SM-G955U using Tapatalk Quote Share this post Link to post Share on other sites
+Ksarul #4 Posted December 27, 2019 (edited) Note: main chips on both boards are TMS9900s, made between 8301 and 8314 (first and fourteenth weeks of 1983). The number you were looking at is basically just a lot number. Edited December 27, 2019 by Ksarul 1 Quote Share this post Link to post Share on other sites
Mehridian Sanders #5 Posted December 27, 2019 Note: main chips on both boards are TMS9900s, made between 8301 and 8314 (first and fourteenth weeks of 1983). The number you were looking at is basically just a lot number.Thank you. you've given me good knowledge. I have gotten better at Basic Electronics Knowledge (89), I've spilled my beer.Sent from my SM-G955U using Tapatalk Quote Share this post Link to post Share on other sites
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