Modifying Z88 Extender Card

Programming different Cards

On the previous EPROM Programmers, the footprint could be set independently from the device. This is no longer the case.

The 1M chip connections are as follows:-

						34 WAY CONNECTOR Z88 CARD
									LINK
						34 WAY CONNECTOR PROGRAMMER
						DIL FUNCTIONS 256K EPROM
						DIL FUNCTIONS 512K FLASH
						PIN OUT OF 32 PIN HEADER
						PROGRAMMER ZIF 32 & HEADER
							TSOP 40 Functions
1		1				A19	A19				NC	A20
2		17		/WE	31	A18	A18				NC	A21
				A17	30	A17	A17				/WE	/CE	22	/CE	/CE Vpp
				A16	2	A16	A16				/OE	/OE	24	/OE	/OE
			A15	A15	3	A15	A15				RY/BY
			A14	A14	29	A14	A14				D7	D7	21	D7	D7
			A13	A13	28	A13	A13				D6	D6	20	D6	D6
			A12	A12	4	A12	A12				D5	D5	19	D5	D5
9	2K2	20					/CE				D4	18	18	D4	D4
			Vcc	Vcc	32	Vcc	Vcc				Vcc	Vcc	32	Vcc	Vcc
							NC				Vss	Vss	16	Vss	Vss
							/RST				Vss
			A11	A11	25	A11	A11				D3	D3	17	D3	D3
			A10	A10	23	A10	A10				D2	D2	15	D2	D2
			A9	A9	26	A9	A9				D1	D1	14	D1	D1
			A8	A8	27	A8	A8				D0	D0	13	D0	D0
			A7	A7	5	A7	A7				A0	A0	12	A0	A0
			A6	A6	6	A6	A6				A1	A1	11	A1	A1
			A5	A5	7	A5	A5				A2	A2	10	A2	A2
			A4	A4	8	A4	A4				A3	A3	9	A3	A3

A pull down resistor is fitted on the Z88 Card side of the connector to ensure it is selected.

The switch is glued to the board to swap the A18 and /WE signals. Footprints are hardware selected.

1M, 512K Flash v EPROM Chips

The difference between the pin-outs of the 512K Flash and EPROM chips are

The differences in the footprints are:

• Vpp
• A18
• /WE

1M Flash & EPROMs

32 Pin EPROM Programmers program up to 512K devices. This switch allows the 1M Flash Card to be programmed in 2 halves.

The switch positions are used to program:-

• DIL 512K HIGH (normal)           -  512/512K Flash / RAM cards and the top half of 1M Flash cards with 32 Pin Programmers.
• DIL 512K LOW                          - the bottom half of 1M Flash cards with 32 Pin Programmers.
• TSOP40 1M Flash                     - with 40 pin Programmers or EPROMs up to 256K EPROMs

Switch Card Details

Modification to Z88 Extender Card

• The card is cut so that the unused part is removed. This enables the lights on the EPROM Programmer to to seen.
• 4 tracks (1, 2, 9 and 17) from the 32 pin header are cut in-between the 2 off 34 way connectors and a 4 pole 3 way switch is used.
• 2 off 2K2 resistors are connected from pin 9 on the Z88 card side and pin 2 on the switch to pin 20.
• The holes of the 2 off 34 way connectors are used to connect to the switch.