THE128RM is a massivly reduced size of the 128 8bit computer. It is designed for the slim size case and packed with everything what you needed.
The board is compatible with 2 SID-Chips. You can also select between 6581 or 8580 and route signal or poti signals to the suggested chip.
Each SID has its own AMP. It is protected agains overtemperature and current overloads. This Amp is suitable for telephony, audio, and servo applications.
The128RM has its own PAL/NTSC clocks. TOD or the VIC-Chip (also the videoconverter for the VDC-Chip) is switchable between regions.
The VDC is converted to an S-Video signal and shares the same output as VIC. Also the video is switchable between 40/80-ON or OFF, or even between VDC-/VIC-Video signal.
The video signal is smoothed out for better picture quality.
The VDC chip is switchable between 8563 or 8568.
Almost every pin is marked with an “PIN number” and a “PIN name” at the backside, to easy find correct pins for future mods.
The Color-RAM’s higher 4bit is not anymore pulled high and it is possible to access via software.
The power supply accepts any DC voltage between 5-36VDC, that is above 3A or more. The Input also protected against reverse polarity protection.
Each logic IC have an operating voltage of 2-6VDC.
The internal output allows you to connect to the following powersources:
- 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
- 1 pcs. THE128RM
- 1 pcs. THE128RM DCR to USB Adapter
- Some sort of magic stuff
Each board will be manually checked for any failures to ensure correct working conditions before shipping.