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Author Topic: Replacement for a standard cartridge (Read 623 times)

Offline pear

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Replacement for a standard cartridge
« on: 2020.March.05. 16:31:58 »
I designed a replacement for the original cartridge, specifically the PCB for it.
I found the housing design for printing on a 3D printer on Thingiverse. A bit tight, but it can be assembled.
You can mount 27C128 or 27C256 memory to the socket.
It works :)

Gerber files attached.
« Last Edit: 2020.March.05. 17:35:04 by pear »

Offline Zozosoft

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Re: Replacement for a standard cartridge
« Reply #1 on: 2020.March.05. 16:38:39 »
You can mount 27C128 or 27C256 memory to the socket.
Possible modified PCB for 27C512? Or still using the old fashioned one cut + one wire hack? :-)

Offline pear

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Re: Replacement for a standard cartridge
« Reply #2 on: 2020.March.05. 16:42:20 »
There is no need. I made one more PCB.
I just haven't tested yet.

Offline Zozosoft

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Re: Replacement for a standard cartridge
« Reply #3 on: 2020.March.05. 16:43:36 »

Offline gflorez

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Re: Replacement for a standard cartridge
« Reply #4 on: 2020.March.05. 17:24:40 »
Great idea! There are a great number of users without a cartridge to try.

And I see that you have added a read-only/write switch, so the content can be modified easily in situ from the Enterprise, for example fitting an AMD 64KB flashRom and with Zozo┬┤s SD cartridge updater app.

Offline msch

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Re: Replacement for a standard cartridge
« Reply #5 on: 2020.November.24. 06:46:10 »
Hi pear,

Can You tell me the values for the discrete components (capacitor, resistor network)?
I assume C1 should be 100nF.
« Last Edit: 2020.November.24. 07:10:19 by msch »

Offline pear

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Re: Replacement for a standard cartridge
« Reply #6 on: 2020.November.24. 16:21:13 »
Attached are the schemes with the values of the elements.

Offline msch

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Re: Replacement for a standard cartridge
« Reply #7 on: 2020.November.24. 23:09:17 »
Thank You very much :)