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I am hoping some one can help me with this as i have 2-3 of these computers and the ULA's were made for the company only and they are known to fail.
i was thinking if i could make a plug in circuit to replace these i could get them running again the only problem my knowledge is very low and i'm trying to up-skill to try and see if it can be done.
IC 35 = ULA9RA041 (1G0003) ,I think 1G0003 can be replaced with a 8255A and several logic ic,
IC 52 = ULA5RA087 (1G0002) .and 1G0002 can be replaced with a CPLD chip
but i have no idea how to do this.. i have attached the 2 tech manual pages for these IC's.
i was thinking if i could make a plug in circuit to replace these i could get them running again the only problem my knowledge is very low and i'm trying to up-skill to try and see if it can be done.
IC 35 = ULA9RA041 (1G0003) ,I think 1G0003 can be replaced with a 8255A and several logic ic,
IC 52 = ULA5RA087 (1G0002) .and 1G0002 can be replaced with a CPLD chip
but i have no idea how to do this.. i have attached the 2 tech manual pages for these IC's.
