2PAC Mafia
Member
Hi,
I have to repair some CPU lift boards. I have tested all the simple digital IC´s and passive components and all are OK. Measuring consumption and touching (heat) some other complex IC´s I thing I have problems. I would like to replace all of them to be sure I´m solving the problem but my question is about these IC´s. They are:
8255A (Programmable Peripheral Interface)
8254 (Programmable Interval Timer)
8085AH-2 (Single chip 8 bit N channel microprocessor)
8259A (Programmable Interrupt Controller)
Apart of these I have 2 EEPROM 27256 and 2 static RAM. Could I replace these list of components? are they programmed through the software stored at EEPROMs?
I have to repair some CPU lift boards. I have tested all the simple digital IC´s and passive components and all are OK. Measuring consumption and touching (heat) some other complex IC´s I thing I have problems. I would like to replace all of them to be sure I´m solving the problem but my question is about these IC´s. They are:
8255A (Programmable Peripheral Interface)
8254 (Programmable Interval Timer)
8085AH-2 (Single chip 8 bit N channel microprocessor)
8259A (Programmable Interrupt Controller)
Apart of these I have 2 EEPROM 27256 and 2 static RAM. Could I replace these list of components? are they programmed through the software stored at EEPROMs?