Sharp MZ-3500 service manual Sub-CPU side, Procedure

MZ 3500

Sector 1, Track 0 information

0						10	15
						i
AAH 1CH	TRACK SIDE	SECTOR	N	NO. OF	I	t	TRACK SIDE SECTOR SECTOR N
				SECTOR	i	i
					i	1
\
Represent the	Drive unit				Load address	Start address
system media	specification
		Test program
		20					50
NO. OF			NO. OF				NO. OF
SECTOR			SECTOR				SECTOR

SUB-IOCS -H the end

		Single dencity (Track 0)	No of data transfers = INT [IOCS capacity/1 K] + 1
		Double density (other than Track 0)
	-i!		•	Sub-IOCS can be divided into eight blocks. If divided to
		SIDE 0 (front side)
SIDE				less than eight blocks, the block following to the final
		SIDE 1 (reverse side)
				block mut be traced by "FFH".

11-2. Sub-CPU side

[Test items]

Memory, VRAM, GDC peripheral, clock, speaker, printer interface, light pen. and RS232C interface.

GO/NO GO of the test must be confirmed on the video screen. Moving from test to test is done by depressing the HALT key.

No. 1 2 3

POSITION OFF ON ON

[Procedure]

(1)Turn OFF all dip switch of the 4 bits unit located in the middle of the front side of the board and turn OFF all dip switches of the 2 bits unit.

(2)Set the system dip switch levers (10 bits) located on the reverse side of the board to the foilowing positions.

4 5 6 7 8 9 10

ON ON OFF OFF ON ON ON

(3)Turn power on while pushing the HALT siwtch to start the test program. Then, push the HALT switch to step to each test phase.

Result of GO/NO GO will appears on the video screen, except for the CRT interface and speaker tests.

-96-