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December 29, 2011
about 3 years ago
OK. Found the problem. The TTL signals coming from the chip are inverted relative to my PC.
inmcm’s test program works fine. I only have problems wiring up to a UART on the PC. I’ve tried multiple PCs, cables, and terminal emulators. STUMPED!!!
I’m trying to get this board working with the transparent terminal sketch
I’ve fixed the ocillator issue in the code 0x50->0c60 and I’ve tried with two boards – one with the IRQ jumper and one without. In either case, the data gets garbled in transmission. There is a pattern to it. For example for an input of ‘1’ I get ‘g’, 3->f, 5->e, 7->d, 9->c, a->O, c->N. I haven’t found the pattern for even input values.
Anyone have ideas/suggestions?
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