Diagram for making your own cartridges?

Discussion forums for users of the Cambridge Z88 Portable Computer
cj7hawk
Posts: 8
Joined: Sat Oct 09, 2021 7:43 am

Diagram for making your own cartridges?

Post by cj7hawk »

Hi All,

Are there any preexisting circuit layouts for DIY ROMs. or otherwise a set of details for mechanical properties of the card to make your own?

Regards
David
McKlaud
Posts: 337
Joined: Tue Dec 19, 2017 10:02 pm
Location: St Albans, UK

Re: Diagram for making your own cartridges?

Post by McKlaud »

Hi, please see the attached.
Attachments
Z88 edge conn
Z88 edge conn
Patent no. WO8809573
Patent no. WO8809573
Claudius
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cj7hawk
Posts: 8
Joined: Sat Oct 09, 2021 7:43 am

Re: Diagram for making your own cartridges?

Post by cj7hawk »

Thank you ! :)
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XavSnap
Posts: 1985
Joined: Sat May 10, 2008 4:23 pm
Location: 'Zx81 France' Fb group.

Re: Diagram for making your own cartridges?

Post by XavSnap »

connector.jpg

Kicad module & footprint:
Z88_Connector.zip
(73.4 KiB) Downloaded 357 times
Just import the lib & mod file from the zipped file.
built from the previous diagram...
You had to check holes places.
Xavier ...on the Facebook groupe : "Zx81 France"(fr)
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XavSnap
Posts: 1985
Joined: Sat May 10, 2008 4:23 pm
Location: 'Zx81 France' Fb group.

Re: Diagram for making your own cartridges?

Post by XavSnap »

Hi,

My update from the scanned PCB...
Unfortunately, there's only the front side.
You had to meticulously check the real PCB, to update this project...

Note: The connector width had to be adjust to the real socket.
connector2.jpg
connector3.jpg
z88_romcard.JPG
diagram.jpg
Kicad poject (Mod & Lib updated):
Z88_Connector.zip
(325.14 KiB) Downloaded 346 times
Technicals informations from : https://worldofspectrum.org/z88forever/ ... rdware.htm
Xavier ...on the Facebook groupe : "Zx81 France"(fr)
McKlaud
Posts: 337
Joined: Tue Dec 19, 2017 10:02 pm
Location: St Albans, UK

Re: Diagram for making your own cartridges?

Post by McKlaud »

Wow! This is impressive.

One comment, the cartridge seems to be too wide and it would not fit into the slot.

There are no contacts on the other side because sockets are single sided. See photos.
Attachments
IMG_4042.jpg
IMG_4041.jpg
Claudius
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User avatar
XavSnap
Posts: 1985
Joined: Sat May 10, 2008 4:23 pm
Location: 'Zx81 France' Fb group.

Re: Diagram for making your own cartridges?

Post by XavSnap »

Hi,

The new update release 1.1.
connector2.jpg
connector3.jpg
Z88_Connector.zip
(397.01 KiB) Downloaded 391 times

Edit: (to Chris_68=>MIY/WIP)
Z88_ROM_gerber.zip
(53.23 KiB) Downloaded 228 times
Xavier ...on the Facebook groupe : "Zx81 France"(fr)
Jbizzel
Posts: 64
Joined: Thu Apr 23, 2020 6:58 pm

Re: Diagram for making your own cartridges?

Post by Jbizzel »

See a link to this WIP:

https://github.com/jimconner/z88-flash

An open-source 1MB Flash Expansion (AM29F080) PCB for the Cambridge Z88.
Fecn
Posts: 8
Joined: Fri Mar 10, 2023 5:08 pm

Re: Diagram for making your own cartridges?

Post by Fecn »

Just an FYI for any interested parties - I ordered some of my 1M Flash design from JLCPCB and my order arrived yesterday. Only after soldering a chip in place and trying it in my Z88 did I discover that the pitch on the Z88 connector is incorrect. It appears that the correct spacing for the pins is 1.25mm, but @XavSnap's connector is spaced at 1.27mm.

I'm planning to fix up my design over the next couple of days - watch this space.
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XavSnap
Posts: 1985
Joined: Sat May 10, 2008 4:23 pm
Location: 'Zx81 France' Fb group.

Re: Diagram for making your own cartridges?

Post by XavSnap »

@Jbizzel ;)

@Fecn Thanks for updates !
Xavier ...on the Facebook groupe : "Zx81 France"(fr)
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