I guess you have to map the keyboard first! good luck. On Thu, Dec 15, 2022 at 4:07 PM <didier_at_aida.org> wrote: > Thanks Bill, I will check the schematics and try to see if by typing a > series of characters I get other errors > > actually it's not so easy I have a keyboard with black keys without any > marking.... > Le 12/15/2022 à 4:44 PM, Bill Degnan a écrit : > > This reminds me of a teletype repair where the ascii characters have a bit > stuck hi ir low. So, you'd compare the cbm ascii value of the character > you're getting with the character you're expecting. See if other > characters are impacted to determine the pattern. Use this info to track > down the fault i.e. which data line is sticking hi or low. Also, is it a > screen ram or general ram issue, you can test for that. > > On Thu, Dec 15, 2022, 10:35 AM <didier_at_aida.org> wrote: > >> on my 8032 motherboard, I have a strange cursor >> >> blinking 2x2 checker board... >> >> when I replace the ram and rom (except $E000) with tynemouth ram/rom I >> get the same result >> >> the $E000 is brand new and made with a 28c16 containing Steve's NTSC >> editor... >> >> >> I'm convinced the problem comes from the crtc or the circuitry producing >> the video signal >> >> any idea ? >> >> >> thanks >> >>Received on 2022-12-15 23:03:16
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