C128/C128D RAM EXPANDER TEST
VERSION 1.2.1
REQUIRED EQUIPMENT: C128 OR C128D COMPUTER
1571 SINGLE DISK DRIVE (C128 ONLY)
MODEL 1700 OR 1750 RAM EXPANSION MODULE
40 COLUMN MONITOR OR TV SET
VERSION 1.2 DIAGNOSTIC DISKETTE
DESIGNED TO TEST : 1700 OR 1750 EXTERNAL RAM EXPANDER
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THE 1700/1750 RAM EXPANDER WILL NOT OPERATE PROPERLY WITH THE REV 6
PCB, (C128 ONLY), INSTALLED. IF THIS PROBLEM ARISES, THE PCB MUST
BE REPLACED WITH A REV 7 PCB OR HIGHER
THE RAM EXPANSION MODULE MUST BE INSERTED IN THE SYSTEM UNDER TEST
BEFORE POWER IS APPLIED AND THE RAM EXPANDER TEST IS LOADED
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The RAM Expander Test is used to Diagnose Failures of the RAM ICs,
any ROM which may be installed and the REC, (RAM Expansion Controller) ,
in the Model 1700, (128K) , or 1750, (512K) , RAM Expansion Modules
The RAM Expansion Test Auto-Executes when loaded and displays a picture
of the RAM Expansion Module.
* If a Failure Occurs during Test Run Time, the IC Location Displays in
Reverse Field and a 'BD' (BAD), message is displayed in the Defective
IC Location.
* If No Failure is detected, an 'OK' is displayed
* The Number Displayed in the Upper Left Hand Corner of the screen is
the Test Version Number and does not effect Diagnostic Testing
* The Size of the Module Under Test, (1700 - 128K or 1750 - 512K),
is displayed in the Upper Right Hand Corner of the screen
* If Incorrect Size Is Displayed, It May Indicate a Defective REC
* The Number of Completed Cycles, 'COUNT', is displayed in the
Lower Left Hand Corner of the screen
* Cycle Time is dependant on the Size of the Expansion Module
* Two (2) Clocks, (AM and PM), are displayed in the Bottom Right Hand
Corner of the screen
* AM Clock = Internal Time Of Day Clock of 6526 CIA Location Ul
* PM Clock = Internal Time Of Day Clock of 6526 CIA Location U4
* ClAs are Located on the Main PCB of the C128 or C128D
* These Two (2) Clocks must display the EXACT SAME TIME during
Diagnostic Run Time and Increment as the Test Continues
TIME-OF-DAY-CLOCK FAILURES
* Incorrect AM Clock - Possible 6526 CIA Failure - Location Ul
* Incorrect PM Clock - Possible 6526 CIA Failure - Location U4
* Incorrect Both Clocks - Possible 60 HZ TOD Input Failure
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