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 23:00:02
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