+acadiel Posted October 31, 2020 Share Posted October 31, 2020 Got my Pyuuta in today. Screen looks funny, reminds me of a TI VRAM issue. Might also try reseating the rom if it’s socketed. All the letters are off by one ASCII character, so maybe the LSB? Quote Link to comment Share on other sites More sharing options...
+mizapf Posted October 31, 2020 Share Posted October 31, 2020 (edited) TNLX 06BHT FR@PHHB BNLPTTDR These characters all have even ASCII code. Add a 1 to some of them: TOMY 16BIT GRAPHIC COMPUTER (i.e. the rightmost data bit is stuck to 0) Edited October 31, 2020 by mizapf 1 Quote Link to comment Share on other sites More sharing options...
+acadiel Posted October 31, 2020 Author Share Posted October 31, 2020 1 hour ago, mizapf said: TNLX 06BHT FR@PHHB BNLPTTDR These characters all have even ASCII code. Add a 1 to some of them: TOMY 16BIT GRAPHIC COMPUTER (i.e. the rightmost data bit is stuck to 0) Yep, we figured out on Facebook that pin 25 RD7 goes to the upper right most chip. That’s our bad one. We probably want to make the same troubleshooting guide to show which chip is which bit. 2 Quote Link to comment Share on other sites More sharing options...
+acadiel Posted October 31, 2020 Author Share Posted October 31, 2020 Just in case people what to know which VRAM is which bit.... L is LSB (top right) and M is MSB (lower left.) 4 Quote Link to comment Share on other sites More sharing options...
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