is this a MSX?

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Por Manuel

Ascended (18777)

Imagen del Manuel

02-02-2015, 15:28

I now got ROM sets of version 1 and version 2 (mostly that version number of basic seems different), but I haven't seen any graphical intro screen. How do I get that?

Por mars2000you

Enlighted (6216)

Imagen del mars2000you

02-02-2015, 15:53

There are 2 hypotheses :

- it's produced by a specific PC rom and the machine is actually 10% PC - 90 % MSX, so an hybrid machine that is not so sophisticated as the Spectravideo SVI-838 and the Philips PTC MSX PC

OR

- it's produced by a MSX rom that is not indicated in the manual of the 2nd version and that is not detected by MSXMEM; this ROM should be a BASIC rom as the loading is very slow, located in slot 0 from 8000h to BFFFh and should have priority on a game ROM inserted in slot 2.

Por anonymous

incognito ergo sum (116)

Imagen del anonymous

02-02-2015, 15:56

mars2000you wrote:

There are 2 hypotheses :

- it's produced by a specific PC rom and the machine is actually 10% PC - 90 % MSX, so an hybrid machine that is not so sophisticated as the Spectravideo SVI-838 and the Philips PTC MSX PC

No, there's no "PC hypothesis" here. You thought the characters "PC" etched as part of the labeling in a standard 74LS logic chip meant that this computer is some kind of hybrid.

It is not.

Por Manuel

Ascended (18777)

Imagen del Manuel

02-02-2015, 15:58

What makes you think there's something PC-ish to all of this? I haven't seen any indication for that so far.

Por anonymous

incognito ergo sum (116)

Imagen del anonymous

02-02-2015, 16:04

Manuel wrote:

What makes you think there's something PC-ish to all of this? I haven't seen any indication for that so far.

This is why he thinks this is a PC hybrid:

mars2000you wrote:

Btw, there's a small chip with the indication 74LS32 PC. It could confirm my own theory that this machine is actually an hybrid machine PC and MSX.

This is not an MSX-PC hybrid like the SVI 838.

Por l_oliveira

Hero (533)

Imagen del l_oliveira

02-02-2015, 16:05

There's 64KB of ROM on that computer (the Frael). Considering the number of chips in it, it's possible the extra ROM is mapped at 8000-FFFF on slot 0...

Por mars2000you

Enlighted (6216)

Imagen del mars2000you

02-02-2015, 16:05

Not the chip marked PC, as it was only an additionnal guessing and was already out of my thinking since JaviLM technical answer, so it was useless to come back again with that !!!

Actually, I have the rom of second version since almost 4 years and it seems impossible to dump the hypothetic second rom. But maybe our Brazilian friend will succeed ...

Por mars2000you

Enlighted (6216)

Imagen del mars2000you

02-02-2015, 16:07

JaviLM wrote:

This is why he thinks this is a PC hybrid:

mars2000you wrote:

Btw, there's a small chip with the indication 74LS32 PC. It could confirm my own theory that this machine is actually an hybrid machine PC and MSX.

WRONG as I had already seen your technical answer !!!

Por Manuel

Ascended (18777)

Imagen del Manuel

02-02-2015, 16:16

I also got a slot dump of the top part of slot 0, but nothing was there. (Except showing that uninitialized memory returned as 0xB0, instead of 0xFF or 0x00.)

Por mars2000you

Enlighted (6216)

Imagen del mars2000you

02-02-2015, 16:18

Manuel wrote:

I also got a slot dump of the top part of slot 0, but nothing was there. (Except showing that uninitialized memory returned as 0xB0, instead of 0xFF or 0x00.)

I have also such dump, so no second MSX rom !!!

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