UniRetroRom
With this adapter using a 27C256 you can replace a Commodore Vic20 or 64 breadbin rom (2332 or 2364) by simply moving a jumper to emulate the Basic, Kernal or character ROM.
Components:
R1,R2: 10K Ω
R3,R4: 100K Ω
C1: 100nF 16/25v
U1: AT28HC256E
J1 is used to select the rom
open: Rom Characters
1-2: Rom Kernal
2-3: rom Basic
JP2 is used to bring CS2 into the 2332 ROMs.
It is needed only in the vic20 character rom because this computer uses both CS1,CS2 signals.
In the C64 character rom it is optional, while it should not be jumpered if a 2364 is used.
open: 2364 (or even 2332 C64)
closed: 2332 Vic20 only (also works on 2332 C64)
more details on the GitHub page:
UniRetroRom
*PCBWay community is a sharing platform. We are not responsible for any design issues and parameter issues (board thickness, surface finish, etc.) you choose.
- Comments(0)
- Likes(7)
More by Mirco Gaggiottini Retrofixer
-
C64 Diagnostic and Dead Test
Scheda diagnostica per C64 2 in 1 (Dead Test e Diagnostica)Con questo PCB è possibile inserire anche...
-
Tomy Tutor (Pyuta) Membrane
PCB to replace the Tomy Tutor (Pyuta) membranePrinted with a thickness of 0.6mm even without gold fi...
-
6510 TO 8501
Simple adapter to use the MOS 6510 (C64 processor) as the 8501 (C16 processor).If you use this adapt...
-
C64 Light controller
For operation, bom and everything else follow me on GitHub:https://github.com/zeus074/C64-light-cont...
-
UniRetroRom
With this adapter using a 27C256 you can replace a Commodore Vic20 or 64 breadbin rom (2332 or 2364)...
-
Amstrad GX4000 multicart or CPC464 PULS
Multicart 16 game in 1 for Amstrad GX4000 and CPC464 Plus By Mirco GaggiottiniYou can find the BOM o...
-
Commodore 16 RAM expansion 64Kb solderless on TED
64Kb RAM expansion for C16 C116Adapter to put under the TED to be able to expand the computer memory...
-
27xxx to 2364 or 2332
ROM Adapter 27xxx to 2364/2332 By Mirco GaggiottiniWith this Pcb you can use a 2764 up to 27512 inse...
-
Dram tester for 4116, 4164/256 and 4532 (Original)
Dram Tester V.4.2 By Mirco Gaggiottini (original project)With this Pcb you can make the DRAM memory ...
-
-
-
kmMiniSchield MIDI I/O - IN/OUT/THROUGH MIDI extension for kmMidiMini
113 0 0 -
DIY Laser Power Meter with Arduino
162 0 2 -
-
Box & Bolt, 3D Printed Cardboard Crafting Tools
156 0 2 -
A DIY Soldering Station Perfect for Learning (Floppy Soldering Station 3.0)
561 0 2
