NEC PC-100 is a personal computer based on 8086 (more pictures are here). Submodel PC-10030 is equipped with a color framebuffer board. Even with the color framebuffer board, CRT still connects to the connector on the motherboard. PC-10030 is usually used with a proprietary display PC-KD651, which supports pivoting (changing display orientation). This information is preliminary as we only figured out the protocols of video signals so far (we assume pivoting is just a switch though).
D-sub DE-9M connector on the motherboard:
------------- \ 1 2 3 4 5 / \ 6 7 8 9 / \_______/
# | Description |
---|---|
1 | Red |
2 | Green |
3 | Blue |
4 | Hsync |
5 | Vsync |
6 | GND |
7 | GND |
8 | GND |
9 | Pivot |
Signal levels are VGA compatible, but the synchronization frequency is out of range of VGA signalling. Some displays support this freqency however.
Currently my PC-100 is working but the MS-DOS system disk is broken.
If anybody can privide me with those diskettes, please send me an email.
I got a working copy of system disk for the NEC PC-100.