By Varaktori

Resident (60)

Varaktori's picture

30-12-2013, 12:03

It would be fun to run OS-9 operating system? Wink
The only and big problem is that it needs 6809 processor. So I need build coprocessor card and Hitachi 6309 is faster but compatible alternative. Is anybody ever designed something similar or do I have to start from scratch? Smile

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By jltursan

Prophet (2537)

jltursan's picture

30-12-2013, 17:03

AFAIK, there're no secondary CPU cards in MSX. As the mainstream OS in the eighties was CP/M and it needed a Z80, the MSX benefit with no changes from that, while other popular machines (Apple) needed Z80 cards to work with CP/M.
The closest thing that comes to my mind is the Padial's Cards Procesor for EV4

By Varaktori

Resident (60)

Varaktori's picture

30-12-2013, 17:24

Well there might be little bit of work ahead before I can boot to OS-9. Most of the needed parts I have already. Tongue


Enlighted (5848)

NYYRIKKI's picture

31-12-2013, 20:06

Ah... You can run for example SymbOS already, but you want to run OS-9... What ever makes you happy Smile Smile Smile

By edoz

Prophet (2371)

edoz's picture

31-12-2013, 20:54

Symbos is cool! So try that first I would say Big smile

By Varaktori

Resident (60)

Varaktori's picture

31-12-2013, 22:46

Bill Gates and many others has regarded 6809 to be the best 8-bit processor ever so why not? Tongue
Running SymbOS does not need soldering iron so it does not make me very happy. Tongue Tongue Tongue

By PingPong

Prophet (3756)

PingPong's picture

01-01-2014, 00:22

the msx system was unfortunately not meant to be a multi processor system, nor there is DMA feature to allow to stop the z80 while using another processor. I do not know how much is difficult to achieve your idea.


Paladin (827)

WORP3's picture

01-01-2014, 01:45

Indeed fore some unknown reasons they forgot to connect the busreq/ack signals to the cartridge slot so other cpu could be added Sad