Need help reverse engineering Timex Store Demonstrator ROM file

[XavSnap]

the PCB had to be check.

[XavSnap]

Kicad Project: (r 1.1)

StoreDemo.zip

(1.95 MiB) Downloaded 277 times

StoreDemo_Gerber.zip

(105.74 KiB) Downloaded 255 times

http://zx81.ordi5.free.fr/CartesZx81/Ti ... onstrator/

Thinks Paul !

[dessony]

XavSnap,

As I told you about the 74LS133 voltage feed reversal a few posts ago here. I completely agreed with Paul! I fixed this problem with two "stacked" 16 pins sockets and two short wires on my "bugged" board.

I wondered whether can I add a few millimeters and centimeters to the board's height and slightly enlarge these edge connector's holes by editing the shared StoreDemo's file content. If so, then how can it be done?

Thank you very much in advance.

Cheers,
DesSony

[Paul]

XavSnap,

As I told you about the 74LS133 voltage feed reversal a few posts ago here. I completely agreed with Paul! I fixed this problem with two "stacked" 16 pins sockets and two short wires on my "bugged" board.

I wondered whether can I add a few millimeters and centimeters to the board's height and slightly enlarge these edge connector's holes by editing the shared StoreDemo's file content. If so, then how can it be done?

Thank you very much in advance.

Cheers,
DesSony

Hi DesSony, just tell me your whishes,
I am making a Version where the ROM is above the Zeddy Case so it fits the Zeddy better with a zif socket.

[XavSnap]

Hi,

DesSony, you can use a DIL ribbon connector, to export the ZIF socket ?

https://www.ebay.com/itm/361985101589
and
https://www.ebay.fr/itm/234446609806?mk ... olid=10050

[dessony]

Hi DesSony, just tell me your whishes,
I am making a Version where the ROM is above the Zeddy Case so it fits the Zeddy better with a zif socket.

Paul,
I got it! I understand that you meant "wishes". BINGO!
1) Give it around 25.4 mm or 1 inch longer between where an edge connector and EPROM/EEPROM socket area are.
2) And ensure that a 7805's pins area is 5 millimeters closer to the R3 Screenprint area because of a DC/DC converter's height.
3) Aries' low-profile ZIF 28 pins socket is encouraged for testing purposes.

10018-low-profile-zif-test-socket.pdf

Aries low-profile ZIF socket

(542.18 KiB) Downloaded 256 times

and a machine-tooled 28 pins socket is for a permanent installation.
4) Slightly enlarge the size of the edge connector's holes for ease of putting the new edge connector onto the board without a struggle.
5) Mark the board as the 1.11 version.

Thank you very much in advance.

Regards,
DesSony

[dessony]

Hello everybody,

The board works!

The stacked and mounted 74LS133 chip is on the 3 sockets.

A red wire comes off a bend-up pin and goes into an opposite side hole.

Big Aries ZIF socket side. The Aries low-profile ZIF socket would be a better one.

Notice the DC-DC converter's body area near the TS2040 connector? Real tight! WOW!

A blue wire comes off a bend-up pin and goes into an opposite side hole.

I want to post a resulting video file here. How do I do it? YouTube? Dropbox? Whatever?

Thank you very much in advance.

Regards,
DesSony

[1024MAK]

Link (URL) to YouTube is the most common.

Unless the administrators change or have changed the relevant forum settings, embedded videos such as on YouTube using flash tags cannot currently be done.

Mark

[dessony]

Hello 1024MAK and the rest of you,

Here is the resulting video link!
https://youtu.be/ADPGdyKzrew

Please tell the forum about your opinion on the board.

Thank you very much in advance.

Cheers,
DesSony

[XavSnap]

Hi,

DesSony's DemoStore card is ready.

Demo demonstrator release 2:

1) Low mussel desing.
2) High building concept.
3) Anti-seismic foots.
4) Anti-printer connector.
5) An original name "StoreDemo_V2".
6)... and many other stuff and errors.

Gerber files:
http://zx81.ordi5.free.fr/CartesZx81/Ti ... onstrator/