Bit Corporation BIT-90 computer

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By sdsnatcher73

Paragon (1095)

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08-09-2020, 06:34

On this page there is info the Bit 90 was actually a SC-3000 clone and technically very close to MSX1 (but without MSX BIOS that does not matter much). There were no games specific for these machines as they were all clones made in Taiwan and were used with pirated game carts. Probably Coleco and Sega did not even sell their games and hardware in Taiwan and China due to low income there at those times, which was the reason these clones existed. They were cheap (built without licenses) and thus affordable.

So for emulation purposes these are not very interesting imho. Emulation for SG-1000 and SC-3000 should not be difficult for openMSX (BlueMSX already emulates SG-1000/SC-3000 as well as MAME/MESS)

By gdx

Prophet (3684)

gdx's picture

08-09-2020, 09:59

I doesn't think the BIT90 will be SG-1000 nor SC-3000 compatible. Bit90 pamphlet says only ColecoVision compatible. In addition the locations of the RAM and ROM are not the same. So it doesn't seem possible to run both.

I created a wiki for this computer.
https://www.msx.org/wiki/Bit_Corporation_Bit90

By Bodhi1969

Resident (53)

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08-09-2020, 16:01

I just wonder why Bit-60 and Bit-90 had such a superb BASIC, when there weren´t any programs made with it?

By Manuel

Ascended (16864)

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08-09-2020, 23:19

Are the details known, to check whether this machine could be emulated in openMSX already?
(Details about how all chips are connected to RAM and I/O mapping, etc.)

By Bodhi1969

Resident (53)

Bodhi1969's picture

09-09-2020, 11:48

Manuel wrote:

Perhaps, then it's interesting to create a config for it... but the devil is in the details. Is there a ROM dump of it?

Seems to, because here it is marked as done.
Hint: Search for "Bit 90".

By gdx

Prophet (3684)

gdx's picture

09-09-2020, 12:04

By Bodhi1969

Resident (53)

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16-09-2020, 18:58

So would it be possible to emulate the computer? Except for MESS nobody does. Or is there no relation between cost and benefit? By the way, it has a very interesting and advanced BASIC. Wink

By Parn

Hero (603)

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17-09-2020, 13:45

I'd like to see its BASIC, where can I find some reference?

By Bodhi1969

Resident (53)

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17-09-2020, 17:32

A summary of the commands can be found here. There also is the only listing I found at the same magazine and typed in.

The bit 90 was tested extensively in the issue 09/1984 of the German magazine "Homecomputer". I have the scans of the article here, but unfortunately I can't find the PDF anymore.

By Bodhi1969

Resident (53)

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17-09-2020, 17:53

Found the scans here. B-)

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