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1) Memory test
Sub-IOCS RAM (4000H-5FFF)
Shared RAM (2003H-23FFH)
Shared RAM (2440H-27FFH)
Above are tested.
[Display]
(1) Normal test ending
RA OK: SUB-IOCS RAM
RA OK
RA OK
Above information are displayed on three display
lines.
(2) Abnormal test ending
RA
ER
Shared RAM
2) VRAM check
Proceed to test for ASCI! and atnbute VRAM
[Display]
During test penode, display shows under following.
(1) Display reviced "U" for entire screen Irom top side.
(2) Display blinking "I'' with under! ne for entire screen.
(3) Display entire screen by space.
Test end
1. Normal
VR
OK
2. Abnormal
VR
ER
3) CRT inter face test
Performance of the CRT is tested. To move into each test
phase, push the HALT switch. Test No.1-No.8 test the
400-raster CRT, and test No.9-No.16 test the 200 rasters
CRT.
'Procedure and display]
(TestNo.1)
Confirm all patterns on the display screen of 40 digits and
20 lines.
20
1 2 3 4 5 6 7 8 9 0
2
3
4
5
i
(All patterns)
I
I
5
6
7
8
9
0
C *7 '
O / I
A S C I I 00-FF
(Test No.2)
Confirm all patterns on the display screen of 80 digits and
25 lines.
25
1 2 3 4 5 6 7 8 9 0 -
2
3
4
5
- 5 6 7 8 9 0
(All patterns)
(Test No.3)
(1) Confirm that an entire screen is Filled with "H".
(2) Confirm that attributes are shown as illustrated.
Vertical line
Horizontal line
Highlight
Blink
- 97 -
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