Vector 4 - Page 157

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4,2.2 Procedure For Using Screen Test
To run the sereen test, enter the command SCRNTEST [RETURNL The screen
will clear and display:
SCRNTEST VER. 1.X
Enter character:
On entry of any character except [CTRL CJl, the screen will fill with the
character entered.
To enter another character, press any key, including [CTRL] and [SHIFTL To
return to CP/M, press [CTRL Cl.
4.3 Memory Test
4.3.1 Purpose Of Test
This program allows the technician to test discrete portions of the Vector 4
SBC's memory. The system memory test, performed when the system is first
powered or reset, tests the entire memory by block, and thereby may not
uncover certain timing and refresh errors.
In addition, this program automatically detects the top of memory (128 or 256
kilobytes) before running. During operation, it remaps program and video
addresses into blocks of memory that have already been tested.
4.3.2 Procedure For Using Memory Test
To run the program, enter the command MEMTEST [RETURN]L The screen will
clear and display:
VECT(R 4 MEMCRY TEST Vs. 1.x Available memory is 0000-#####H
Starting address oo;oo ( ) Pass number .ccccee. ( )
Ending address eeceeee () Errors this pass .. ( )
Press [SPACE] to pause test sequence, [SPACE] again to continue
[ESC] to start test sequence, [CIRL C] to return to "EXBEC"
--Address--Wrote--Read
11 4-2 7200-0001 09-01-82