Category Archives: Acorn Atom
Projects, information and programming for the vintage Acorn Atom computer.
Atom Reworked FDC
Information on how the build the Floppy Disk controller for my Acorn Atom Reworked computer. Circuit Diagram Parts List Name Designator Footprint Quantity 10nF C1 CAP_2.54_CERAMIC 1 100nF C2,C3,C4,C5,C6,C7,C8, C9,C10,C11,C12,C13 CAP_5MM 12 ATOM_EXP_64P EXP1 ATOM_EXP_64P_SINGLE 1 7438 IC1 DIP14 1 74LS00 IC2 DIP14 1 7406 IC3 DIP14 1 74LS04 IC4 DIP14 1 CD4013BD IC5,IC6 DIP14 […]
Acorn Atom reworked
This is my version of the Acorn Atom computer, with a few improvements.I’ve tried to make it easy to build by only using through hole components which were mostly available in the 1970’s.This version has 40K RAM, 4K RAM at #A000, Screen noise killer circuit etc. I’ve also designed a case which can be 3D […]
Acorn Atom Reworked development
Hi everyone, I’ve been working on a replica Acorn Atom on and off over a year now and finally have a working prototype I’m happy with. I’ve had a lot of issues with the video out. I just wanted a black and white output, the same as the original Atom, but have had problems with […]
Commodore 16 & Plus 4 8501 to 6510 CPU conversion
C16/+4 8501 to 6510 CPU conversion I have made it possible to convert the unreliable 8501 processor fitted to the Commodore 16 and Plus 4 to the more reliable, cheaper and widely available 6510, as fitted to the Commodore 64. The conversion is very simple for the C16, just plug the small circuit board containing […]
Commodore Plus 4 power connector to C64 version
The Plus 4’s power connector is a square version of the C64’s and is annoying. It’s more convenient to use a Vic 20 or C64 PSU as they are compatible and more readily available. Here’s how to make the necessary modification. First buy a PCB mountable 7 pin DIN connector and cut the two pins […]
Website Crash
Just re-installed WordPress due to a bad plugin causing errors and stopping me from loggin in. Content coming soon.