Sharp MZ-3500 User Manual download pdf (Page 90)

1) Memory test

Sub lOCS 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

Above information are displayed on three display

lines.

(2) Abnormal test ending

RA ER

Shared RAM

2) VRAM check

Proceed to test for ASCII and atribute VRAM

[Display]

During test période, display shows under following.

(1) Display reviced "U” for entire screen iroin 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.l-No.8 test the

400-raster CRT, and test No.9-No.16 test the 200 rasters

CRT.

'Procedure and display]

(Test No.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 as illustrated.

Vertical line

Horizontal line

Highlight

Blink

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Sharp MZ-3500 User Manual Page 90

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