The Penultimate+ Cartridge is a menu driven RAM/ROM cartridge for your Commodore VIC20 PAL or NTSC.

The Memory Expansion is selectable from 3-35k and include 70+ ROMS including tfw8b exclusive games titles.

Many thanks for this gift to Dave Curran of Tynemouth Software and tfw8b (The Future Was 8Bit)

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Click here to buy the PenUltimate+ Cartridge.

The Commodore A601 provide 512k/1Mb of additional memory for the Commodore Amiga 600.

The RAM Expansion Module also provides you a real-time clock with rechargeable battery.

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This version of the Atari 410 Cassette Recorder differs from the one inside the “Atari – The Educator” box only for the additional colored box that hold the simple one in white cardboard.

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Commodore CBM 8032 (HP – Early version 1980) – CompuThink Disk Drive Controller – External Dual Disk Drive – Woltron ROM-BUS Adapter.

• COMPU/THINK (CompuThink) Dual Disk Drive Controller with 8k RAM per commodore PET 8032 (It could be a Prototype or a Clone Board with ASSY 001-35 – DD DSK CTL COMP).
• COMPU/THINK External Dual Disk Drive 800k DD/DS.
• WOLTRON ROM (CompuThink C-DOS & TOOLKit) + PET/CBM Expansion BUS Adapter + PIA (Peripheral Interface Adapter) Motorola MC6821.

Unfortunately there is no documentation on the net of this Computhink card that seems to be a prototype or a clone, also there is no documentation or photos of the BUS/ROM Adapter by Woltron.

I spent sleepless nights looking for the starting SYS for the disk management software on the eprom, i have disassembled 24k of code (C-DOS Roms / Basic Roms Patched / Edit Roms Patched) in machine language.

I did it and found it the starting sys ($E790 – SYS 59280), although everything seems to work perfectly after the sys command is printed on the screen (*DOS-40*) and by typing the directory command ($d,1) or the format command ($f,1) the floppy starts to run correctly but the head does not move, while the exit command ($h) work correctly,
i need to say that i replaced the FDC1791 and some floppy disk logic and also one floppy disk drive, but nothing changed.

My suspicion falls on the PROM 82S123 there is no dump on the net, reading this PROM of 32 bytes, only the first 8 Bytes are filled, this is right ? we’ll never know.

All EPROM and PROM have been dumped and you can find them in the archive below.

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Download: C-DOS 4.0 - Basic/Edit Roms Patched - PROM 82S123 (1172)