Hello to all members ,
Yesterday i had a lucky find outside the trash, a XEGS always wanted an 8 bit computer and voila but,
When i power it up it goes to memory test which shows me two red squares for rom. Every ram square (40 of them) are passing the test ok.
Already i tried to reseat the only socketed chips Rom and GTIA also used contact cleaner but the same happens.
Also i've removed every capacitor and measure it with a capacitometer and every single one is ok.
I am asking you is there a way to bypass the self test maybe put 5Volts to pin 6 of mmu?
Is there anythink else i can do ? I have a full electronic lab except a logic probe.
Thank you for your time...