Pincoder Diagnostics Inc. Version 2020.06.23.0506

ROM NAME
==============================================================================================

03-cmos-IC19 (Williams sys7)



PURPOSE
==============================================================================================

This ROM tests the READ and WRITE capabilites of the following chip:

    * Schematic name: IC19

    * Address range: $0100 to $01FF

    * Data bus mask: $0F



PROCEDURE
==============================================================================================

While this test is running observe the LEDs on the MPU board. Test repeats once for each
flash.

    NOTE: You must have the coin door OPEN for this test to PASS.


    NOTE: You do not need the batteries installed on the MPU board for this test to pass.

You can gently wiggle the chip in its place while the test is running. If you get different
results then you should check the solder connections on the chip socket and/or replace the
socket.



EXPECTED RESULTS
==============================================================================================

Positive: Top LED flashes: Chip is good.

Negative: Bottom LED flashes. Replace chip.

    NOTE: Due to the the design of the system 7 board the LED segment display will show
    seemingly nonsensical values for this test regardless of whether the test passes or
    fails. Ignore the segment display and rely on the LEDs themselves.


Pincoder Diagnostics Inc. Version 2020.06.23.0506
