Comparison of SBC6120 Models
| SBC6120
| Model 2
| Model RC
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| Front Panel
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- Computer and front panel are separate PCBs
- Uses custom manufactured faceplate
- Silkscreened in five colors, laser cut and laminated
- Uses 20 paddle switches w/colored plastic handles
- Recessed LEDs with windows and a shadow mask
- Looks like a real PDP-8/E
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- All components are integrated onto a single PCB
- You make your own faceplate
- Laser printer graphics and sheets of clear acrylic
- Uses 20 miniature toggle switches w/metal handles
- “Poke thru the panel” LEDs
- Looks like an Altair
- “Power ON” LED
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|
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- Both front panels are functionally identical with
- 15 address LEDs, 12 data LEDs, RUN LED and POWER LED (-RC only)
- 12 data switches and 8 function switches (BOOT, LA, LXA, CLEAR, CONT, EXAM, HALT, DEP)
- display select rotary switch
|
| Memory
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- 32K word EPROM for BTS6120 firmware
- 64K word RAM
- 32K “main” memory for OS/8 and user programs
- 32K control panel memory
- Optional RAM disk daughter card
|
- 32K word EPROM for BTS6120 firmware
- 512K word RAM, optional expansion to 1024K words
- 32K “main” memory for OS/8 and user programs
- 32K control panel memory
- 448K (960K optional) word built in RAM disk for OS/8
- RAM is non-volatile with Li coin cell backup battery
|
| Peripherals
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- KL8E compatible console serial port
- IDE/ATA interface built in
- Optional RAM disk daughter card
- Optional IOB6120 card adds
- 3x serial ports
- Centronics printer port
- VGA and PS/2 keyboard ports
- real time clock calendar
- CompactFlash card
- additional RAM disk.
- Build your own peripherals!
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- KL8E compatible console serial port
- No IDE/ATA interface
- RAM disk built in
- Optional VT6 daughter card
- No expansion bus
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| Other
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- On board switching power supply (on FP6120)
- External 9-12V unregulated supply required
- POST LEDs
- Reset push button
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- External regulated 5V supply required
- POST codes displayed on data LEDs
- Reset on power on only
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