BALCHECK OPTIONAL PROGRAMS



Included in BalcheckHR are 6 optional commercial Balcheck programs. They are
listed below.


Press        Executes
 Key

  1     Memory Read Loop

  2     Memory Write Loop

  3     Input Port Read Loop

  4     Output Port Write Loop

  5     Memory Write and Read Loop

  6     Monitor Device Input Ports (To TV Screen)


Programs 1 thru 5 were intended for use in troubleshooting a motherboard. Each
program finishes with a tight loop enabling the generation of near constant
waveforms for checking data and control logic. However, these programs will not
execute if screen RAM is not working since they utilize a Z80 CPU stack area in
RAM to be processed.

BalcheckHR has included 2 optional custom troubleshooting loops that will
execute even if screen RAM is not operating. See the BalcheckHR user manual doc
"Optional Troubleshooting Programs" for details.

Program 6 allows monitoring of all the motherboard input devices displaying
their status on the TV screen. Program 6 is intended for use on a working
motherboard to monitor the input devices.


Note

For details on the above 6 programs, refer to the commercial Balcheck
instructional manual, pages 19 thru 26, archived on the BallyAlley.com
website in the Documentation/Bally Check section.



End of document
MCM DESIGN
Dec 2018
