Enterprise Forever

:UK => Hardware => Topic started by: pear on 2020.March.05. 16:31:58

Title: Replacement for a standard cartridge
Post by: pear 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 (https://www.thingiverse.com/thing:2845847). A bit tight, but it can be assembled.
You can mount 27C128 or 27C256 memory to the socket.
It works :)

Gerber files attached.
Title: Re: Replacement for a standard cartridge
Post by: Zozosoft 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? :-)
Title: Re: Replacement for a standard cartridge
Post by: pear on 2020.March.05. 16:42:20
There is no need. I made one more PCB.
I just haven't tested yet.
Title: Re: Replacement for a standard cartridge
Post by: Zozosoft on 2020.March.05. 16:43:36
I made one more PCB.
Nice!!!
Title: Re: Replacement for a standard cartridge
Post by: gflorez 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.
Title: Re: Replacement for a standard cartridge
Post by: msch 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.
Title: Re: Replacement for a standard cartridge
Post by: pear on 2020.November.24. 16:21:13
Attached are the schemes with the values of the elements.
Title: Re: Replacement for a standard cartridge
Post by: msch on 2020.November.24. 23:09:17
Thank You very much :)