Introduction

Flash and EPROM Cards can be programmed in the Z88 itself. What is the attraction of using an EPROM Programmer that is used with the Desktop computer?

Program updates are available on the internet.

Using the Z88

The proceedure of updating the Z88 card is as follows:-

Download the software image for the Z88
Transfer the software (ROMupdate) and the image to the Z88
Use ROMupdate to program the card.

The disadvantage of using this method is when using the 512K/512K Flash RAM Card is that when multiple cards need to be programmed this operation needs to be repeated from 2 because removing the programmed card with the RAM causes a FAIL. A HARD RESET looses the transferred software previously transferred.

Using the EPROM Programmer

The proceedure of updating the Z88 card is as follows:-

Download the software image for the Z88
Program the card
Use ROMupdate to program the card.

The advantage of using this method is when using the 512K/512K Flash RAM Card is that when multiple cards need to be programmed this operation the cards can be changed one after another.

Features

The Z88 Extender Card can be used to program

EPROM Cards
512K/512K Flash RAM
and the 1M Flash 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
			A16	2	A16	A16		/OE	/OE	24	/OE
			A15	3	A15	A15		RY/BY
			A14	29	A14	A14		D7	D7	21	D7
			A13	28	A13	A13		D6	D6	20	D6
			A12	4	A12	A12		D5	D5	19	D5
9	2K2	20				/CE		D4	18	18	D4
			Vcc	32	Vcc	Vcc		Vcc	Vcc	32	Vcc
						NC		Vss	Vss	16	Vss
						/RST		Vss
			A11	25	A11	A11		D3	D3	17	D3
			A10	23	A10	A10		D2	D2	15	D2
			A9	26	A9	A9		D1	D1	14	D1
			A8	27	A8	A8		D0	D0	13	D0
			A7	5	A7	A7		A0	A0	12	A0
			A6	6	A6	A6		A1	A1	11	A1
			A5	7	A5	A5		A2	A2	10	A2
			A4	8	A4	A4		A3	A3	9	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.

IMPORTANT

Wafers Flats & Slots viewed from the front of switch in extreme anticlockwise position

	34 way connector		34 way connector			40 pin TSOP	32 pin DIL	Centre	Signal
	To Z88 Card		From GQ-4X					GQ-4X
		D	10	11	12
Switch		C	7	8	9
Connections		B	4	5	6
		A	1	2	3
D	9		20 via 2K2	9	9	N. C.	22	9.	/CE
C	17		2	17	17	1	31	31	/WE
B	2		17	2	2	31	1	1	A18
A	1		1	20 via 2K2	18	A19	Vcc	A19	A19
	CENTRE		1M	512K L	512K H	1M	512K	DIL
	Footprint		TSOP	DIL

Conclusion

This is a fast method of programming multiple Z88 cards without using the Z88.

Program a Z88 Flash card