The Compact Commodore 128RM is bringing a modernized approach to the classic 8-bit machine. This reduced-size board fits into a slim case, yet it still manages to keep all the important features of the original computer intact. Retro fans can now pre-order the system for €259.90, with shipments expected in Q3 2019.
Pre-Order Details
The pre-order window runs until the end of March 2019. Buyers should be aware that import taxes may apply and that the final product could differ slightly from preview images. To give enthusiasts more insight, developer Peter Reichenbach shares details about the project in Scene World Podcast #47.
Audio Capabilities
One of the standout aspects of the Compact Commodore 128RM is its support for dual SID chips. Users can select between the 6581 and 8580 versions and even assign specific signal routing to each chip. Each SID has its own amplifier, complete with thermal and overload protection. The amps can be used in multiple applications, including audio projects and telephony.
Video Options
The board provides flexible video handling. The VIC and VDC chips are supported with region-switchable PAL and NTSC clocks. The VDC is converted into an S-Video signal that shares the same output as the VIC, with options to switch between 40- and 80-column modes. The output is smoothed for better quality, and users can choose between the 8563 or 8568 VDC chip.
Hardware Features
Practicality is built into the Compact Commodore 128RM. Each pin on the backside of the board is clearly marked, simplifying hardware modifications. The Color RAM’s higher 4-bit can be accessed directly through software, opening new programming options.
The power supply accepts a wide input range between 5–36V DC at 3A or higher, complete with reverse polarity protection. Logic ICs run between 2–6V, and additional power outputs are available at 3.3V, 5V, 9V, and 12V. The board itself uses a 2oz copper PCB, improving heat dissipation and signal stability under heavy load.
The internal output allows you to connect to the following power sources:
- 3.3VDC @ 1A max.
- 5.0VDC @ 3A max.
- 9.0VDC @ 1A max.
- 12.0VDC @ 3A max.
THE128RM uses 2oz Copper PCBs design provides sufficient trace paths between components to handle greater than normal power loads and to remove heat and noise from the critical components.
You need the following chips to run the computer:
- 1 pcs. 8502 (CPU)
- 1 pcs. Z80 (CPU)
- 1 pcs. 8721 (PLA)
- 1 pcs. 8722 (MMU)
- 1 pcs. 8564 (VIC)
- 1 pcs. 8563 or 8568 (VDC)
- 1 pcs. 32Kbyte ROM
- 1 pcs. 32Kbyte ROM
- 1 pcs. Character ROM
- 2 pcs. 6581 and/or 8580 (SID)
- 2 pcs. 6526 (CIA)
- 6 pcs. 64K (4-bit) dynamic RAM
- 1 pcs. 2048 word x 8bit RAM
Order includes:
- 1 pcs. THE128RM
- 1 pcs. THE128RM DCR to USB Adapter
- Some sort of magic stuff
Final Thoughts
For Commodore 128 fans, the Compact Commodore 128RM offers a practical way to enjoy original hardware in a more flexible format. With careful attention to video, audio, and modding options, the project balances nostalgia with usability.
