Sharp MZ-3500 Shared RAM, CRT inter face test, Abnormal, S C I I 00-FF, Vertical line

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

Shared RAM

RA OK

Above information are displayed on three display lines.

(2)Abnormal test ending

RA 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.

(Test No.2)

Confirm all patterns on the display screen of 80 digits and 25 lines.

(Test No.3)

(1)Confirm that an entire screen is Filled with "H".

(2)Confirm that attributes are shown asillustrated.

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

1 2 3 4 5 6 7 8 9 0	O / I
	C *7 '

2

3

4

5

i(All patterns)

I

20I

5A S C I I 00-FF

6

7

8

9

0

1 2 3 4 5 6 7 8 9 0 - - 5 6 7 8 9 0

2

3

4

5

25(All patterns)

Vertical line

Horizontal line

Highlight

Blink

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