Nikko made msx computer?

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By Takamichi

Hero (637)

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28-03-2023, 14:21

sd_snatcher wrote:

@Takamichi, please check this thread for instructions on how to dump more information about this machine, like the color palette, keyboard ghosting, etc.

I understood ghosting means this and not about special combinations that substitute another key and are universal to all MSXs. About palette, can PC-70100 be having special video chip?

By Takamichi

Hero (637)

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28-03-2023, 14:23

mars2000you wrote:

So, I guess the border color is slightly different from the usual 7, if I refer to your pictures.

Probably Toshiba T6950 difference - see http://bifi.msxnet.org/paledit/?t=2&d=palette

http://bifi.msxnet.org/paledit/palette/preset8.png This one is most similar to PC-70100.

By mars2000you

Enlighted (6480)

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28-03-2023, 14:35

Maybe the Toshiba T6950 integrated in Toshiba T7937 would give colors that are different according it is used in PAL or NTSC mode? Until now, we knew only PAL machines with T9737 , the Nikko PC-70100 is the only one using NTSC.

And it seems me that I have seen somewhere a Japanese comment criticizing Toshiba for their models using T9737, especially HX-51/52 which were not released in Japan. Maybe the explanation would be in the weird colors produced by the T6950 chip in NTSC mode?

By Takamichi

Hero (637)

Takamichi's picture

28-03-2023, 14:44

gdx wrote:

Works also on my openMSX. Character set is almost same as Japanese MSX. Only one is missing. CHR$(&H7E) return nothing.

Is anything wrong with tilde ~ ? I can type it. Besides graphic character kanjis 41H-4FH and 5EH-5FH are blank and 5DH has only highest two rows remaining as if someone manually erased the rest. Did they evaporate from EPROM? Photo

By gdx

Enlighted (6207)

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28-03-2023, 15:14

With the BIOS you gave, I get that:

By Takamichi

Hero (637)

Takamichi's picture

28-03-2023, 16:27

gdx wrote:

With the BIOS you gave, I get that:

That program fails to show tilde on both emulated VG-8000 and FS-A1GT so it's universal to all MSX. I guess the reason is CHR$(&H7F) after it is delete. PRINT CHR$(&H7E);CHR$(&H7F) doesn't display anything.

By Takamichi

Hero (637)

Takamichi's picture

28-03-2023, 17:00

I uploaded the PC-70100 color palette bars which I appreciate to be added to the wiki. Color 10 is slightly yellow but honestly I cannot tell 11 and 14 from 15. Source code if you are curious ;)
The inaccessibility of kana and deletion of kanjis give me the impression the designer wanted to hide Japaneseness of PC-70100 AMAP or did not consider the customers (exhibition visitors?) would need them. On the other hand he didn't know T9737 was not meant for NTSC and existence of CODE key. I am now doubting if PC-70100 was for Japanese market. An average Japanese MSX user dies without seeing any non-Japanese MSX.
Edit: I forgot to mention one of the adhered stickers. "SPACE" on the SPACE bar.

By gdx

Enlighted (6207)

gdx's picture

28-03-2023, 16:43

Okay, DEL is the cause. I had also entered PRINT CHR$(&H7E) alone, but I must have made a mistake. So ~ is not missing.

By Briqunullus

Hero (665)

Briqunullus's picture

28-03-2023, 18:13

Takamichi wrote:

I uploaded the PC-70100 color palette bars which I appreciate to be added to the wiki. Color 10 is slightly yellow but honestly I cannot tell 11 and 14 from 15. Source code if you are curious ;)

Isn't this just a problem in the video circuit?

By Pac

Scribe (7007)

Pac's picture

28-03-2023, 18:28

What is written at bottom? I mean on technical data. Picture is blurred.

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