SymbOS MSX multitasking operating system - help needed!

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By flyguille

Prophet (3029)

flyguille's picture

13-05-2006, 19:41

nice

By Prodatron

Paragon (1788)

Prodatron's picture

15-05-2006, 15:56

Yes, it's like on the CPC (6128), where the standard is also only 128K. Fortunately the VRAM is separated, so the MSX has additional 16K, which means, that in SymbOS there will be about 53KB free on an unexpanded system.
Btw, I like to work with BlueMSX, great emulator! Smile Is it still beeing developed?
One important question: Which FDC is emulated in BlueMSX? I use the "MSX2" config. In the INI file I find "[FDC] Count=2" - what does it mean?

By jltursan

Prophet (2150)

jltursan's picture

15-05-2006, 16:06

Great looking screenshots!, seems that you're progressing very fast! Smile
I'm eager to see your first alpha release!.

By spl

Paragon (1461)

spl's picture

15-05-2006, 16:20

I think the same than jltursan Smile Unfortunately, I can't help you in tech and developping issues.
And BlueMSX, yes, it's still under development and their developers are Mars2000you and Dvik Smile

Yours,

By Prodatron

Paragon (1788)

Prodatron's picture

15-05-2006, 16:55

Yes, I already guessed that Wink Regarding an alpha release, I hope this could be possible in one week, when the disc stuff is running. Today I want to finish most of all the other parts.

By msd

Paragon (1372)

msd's picture

15-05-2006, 16:57

Do you need direct access to the FDC? I think it is easier to use the bios for that. So you don't have to make drivers for all the diverent drive controllers

By HansO

Paladin (672)

HansO's picture

15-05-2006, 18:17


I need routines for sector read/write, get sector ID and track seeking, to be able to get the system and file manager up and running.

Study the diskrom sources at my website!

By flyguille

Prophet (3029)

flyguille's picture

15-05-2006, 18:33

well to program direct diskdrv access in asm is a lot of work... actually there is like more than 10 types of FDC's boards? (I guest)

the problem of to use the bios calls is that maybe you don't want to have the msx-bios structure in your O.S. wasting RAM.

I want to know prodatron which type of memory adm structure has Symbios.

By Manuel

Ascended (15619)

Manuel's picture

15-05-2006, 18:33

Prodatron: most (99%) MSX2 machines have 128kB VRAM, but you know that, right?

Also, most Japanese MSX2 and MSX2+ machines have only 64kB RAM. Most European MSX2 machines have 128kB RAM. TOday, many European MSX2 (and up) machines have 256kB RAM or more.

TurboR machines always have 256kB or more. As Takamichi said once: if your program needs more than 64k and it's for MSX2, you should label it 'turboR only' if you want to sell it in Japan Smile

By Manuel

Ascended (15619)

Manuel's picture

15-05-2006, 18:43

About FDC's: the most important ones are (AFAIK):
- WD2793 (used in many European machines, from e.g. Philips and Sony)
- TC8566AF (used on many (every?) Panasonic machines and also Sanyo)
- MB8877A (this seems to be a simpler WD2793, used in National machines, but also Daewoo and some Brazillian ones)
- Microsol port based FDC (based on WD 2793, but works quite differently: port I/O in stead of memory I/O; used in Brazillian MSX machines).

This list is quite rough, but it gives the big idea, I think.

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