Nikko made msx computer?

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By Takamichi

Hero (637)

Takamichi's picture

29-03-2023, 15:39

The_Engineer wrote:

Why don't you use the Full Status option in the Frame Meister menu to check the signal coming from the PC-70100?

Ok here's page 1. It says NTSC_MJ so PC-70100 is certainly NTSC. Funny thing is this status is SECAM5 when nothing is connected to Framemeister but that' doesn't matter.
Rest 3 pages are about output and versions therefore unnecessary. Display turbulence when using Framemeister sometimes happen, sometimes not, seems to stabilize over time. It never happens with MSX other than PC-70100.

By Takamichi

Hero (637)

Takamichi's picture

29-03-2023, 18:07

Sound testing: Internal PSG sounds same as other MSX to me though noticeably quieter than FS-A1GT. With Tecnobytes AudioWave in slot, CALL SYNTHE and CALL AUDIO works but no MSX AUDIO sound is heard and PLAY#2 statement ends instantly without even waiting silently for the length of the note. Is that because PC-70100 lacks the 12 V slot pin? Emulated PV-16 (same 16 kb ram) cannot play sample music but can play notes after CALL SYNTHE.
FM-PAC's CALL FMPAC freezes PC-70100 prolly because 32 kb RAM is required, same happens with PV-16.. PLAY#2 behavior is same as AudioWave. A1 Spirit runs on PC-70100 but I cannot tell if its SCC is working because honestly its music sounds exactly same when SCC is disabled, and I cannot hear tangible difference from FS-A1GT.

By Pentarou

Hero (517)

Pentarou's picture

29-03-2023, 20:06

Takamichi wrote:

Plate: Above the Panasonic-standard warning, there is a same shaped elaborately defaced square. I failed to "read" it with both my eyes and finger, but if it was similar to that on FS-A1F it originally indicated the (perhaps false) model number and power rating.

I'd say that this is the final proof that the case is a copy of the FS-A1F.
What material has been used? Based on the white color underneath I'd say cold cast resin.

Takamichi wrote:

The lower casing is not a reused FS-A1 either because the where that joystick port 2 is usually there is too flawless to have been closed manually.

I disagree. Looking at one of your photos I can see some defects in the plastic (a cavity) and the plastic is not textured in the 'reworked' areas.
More importantly: I'm not 100% sure, but to me it looks that all the holes on the back side (カセット, 出力, etc) have been manually reworked and look irregularly shaped.

Takamichi wrote:

I wonder if Nikko the excellent plastic crafter could copy a Panasonic casing by eg making a mold out of the original.

There was a whole cottage industry devoted to sell pirate copies of anime figures/plastic models (nowadays 3d printing is used); It's not easy, and certainly not cheap, but absolutely possible.

By Takamichi

Hero (637)

Takamichi's picture

30-03-2023, 14:48

Pentarou wrote:

I'd say that this is the final proof that the case is a copy of the FS-A1F.
What material has been used? Based on the white color underneath I'd say cold cast resin.

If you meant FS-A1, you are right, Its high quality photos here show its lower half is almost that of PC-70100. I marked up the modifications from FS-A1 1 2 3 4 5 6 7 8 No idea why the bottom plate has been severed then repaired by several plastic bars.
I don't remember FS-A1's touch though I do feel some difference but it might be my imagination. As photos tell, the lower casing has blue interior while the upper one is white and definitely looks blue sprayed by someone. I don't know why PC-70100 beneath blue is not black/red like FS-A1. It's not FS-TM1's case that is not engraved with any Japanese.

I posted the benchmark results to Dumping/reverse engineering MSX models thread.

By st1mpy

Paladin (932)

st1mpy's picture

30-03-2023, 17:32

The warning text in the box is a direct copy from a1 (the a1f only has 3 items, does not have the 4th line about ac adapter because it has a power supply built in).
The a1 has a typo on the line about +- of the battery. At the end of the sentence it says "くたさい" which is supposed to be "ください". This typo also exists on the nikko's text.

By Takamichi

Hero (637)

Takamichi's picture

01-04-2023, 17:49

I posted the benchmark and reverse engineering result recorded by the most hifi method available to me - Framemeister and HDMI capturing device - here. Now not-so-funny color bars 1 2
Something unemulatable: PC-70100 keys are much easier to type than most MSX.

By sd_snatcher

Prophet (3659)

sd_snatcher's picture

01-04-2023, 18:07

The "not-so-funny color bar (2)" above seems to be from an MPC-10, according to the description... Maybe you pasted the wrong link by mistake?

Should have it been this image instead?

By Takamichi

Hero (637)

Takamichi's picture

02-04-2023, 02:51

sd_snatcher wrote:

The "not-so-funny color bar (2)" above seems to be from an MPC-10, according to the description... Maybe you pasted the wrong link by mistake?

Should have it been this image instead?

You are correct, it was a pure mistake.

By Takamichi

Hero (637)

Takamichi's picture

23-04-2023, 11:43

I'd like to sell this historical curiosity. If you want it please post here.
About the possible tie between RC cars and MSX I discovered MSX Oendan magazines that frequently featured toy information published exclusively RC issues called Power Radicon (vol 5 6 7 8). They date between 1988-1989 when PC-70100 could have been prototyped. However these magazines are too rare to read.

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