Super! Thanks so much!! Tomorrow i'll do!!I feel a test program coming on...
Can you burn this into a 4K ROM and put it in UD9
Remove all ROMs except UD9 especially UD8Good evening guys....i am desperate, i putter Nivag magic_rom on Ud9 socket but when i turn on i have only scrambled chars screen
I have original edit rom on ud8....
I do this but is the sameRemove all ROMs except UD9 especially UD8
Until Nivag tells us what the ROM is supposed to do, how do we know what it is displaying?
With Ud9.bin i have the first pettester screen but stay stucked! (same of post #400)So @Dave_C78 what happens if the UD9.bin is put in UD9... does that show scrambled too now?
OK so all PETTESTERs now behave the same?With Ud9.bin i have the first pettester screen but stay stucked! (same of post #400)
Yes....OK so all PETTESTERs now behave the same?
Can you remove both PIAs and the VIA and try again see if anything changes?
unfortunately too many changes have been made ... now I don't remember what configuration I had and what kind of pettester I had enteredAn observation. This fault is playing hide and seek with us - so we have to use cunning to flush it out.
So, let’s call this “configuration A” shall we? We know that this configuration ‘sticks’ at the PETTESTER video screen RAM test. Mark the EPROM “config A”.
Get a pen and a notebook and write down the EXACT configuration of the PET (e.g. what chips are in and out). If we change the configuration in the future, you need to write down exactly what you changed.
My question is “what is the difference between this configuration and what you had when you took the photographs back in posts #343 and #368?”.
If you have the same configuration, then the fault is intermittent - and hence coming and going.
Dave
Holy truth!! I will learn to do this too!I am renowned (both at Church and work) to be incredibly diligent about documenting the things that are done and evidence collection. There are usually some questions occurring in the future (maybe months after our work) that I can go back to and dig out the answers...
i removed these ic only for a test but after i re inserted on board!I thought you said that the 6520 and 6522 devices are removed?
i removed these ic only for a test but after i re inserted on board!