Mac OS 9 Lives

Digital Audio Workstation & MIDI => Audio & MIDI Hardware => Topic started by: Blzproductions on October 24, 2019, 06:45:05 AM

Title: Digidesign MH477 PCI Expansion Chassis
Post by: Blzproductions on October 24, 2019, 06:45:05 AM: I've had one of these kicking about for years, but have only recently managed to get hold of a host card (SBS 21-100-2)
Only issue is that the Mac doesn't see the host card in the System Profiler, or the Chassis

There are a set of 5 jumper on the top of the card, I wondered if anyone knows how they should be set?

I take it there are no drivers/extensions associated with the use of the chassis?

Hoping that's all the issue is.
Title: Re: Digidesign MH477 PCI Expansion Chassis
Post by: IIO on October 24, 2019, 08:25:11 AM: right PCI should not require any driver.
Title: Re: Digidesign MH477 PCI Expansion Chassis
Post by: Blzproductions on October 29, 2019, 04:51:29 AM: ATX PSU packed up minutes after posting the last post, so I'll start there, and see what's what.
Title: Re: Digidesign MH477 PCI Expansion Chassis
Post by: mrhappy on October 29, 2019, 06:50:42 AM: Yes a 'flakey' power supply can cause some weird problems that are hard to track down.;D

Last year I spent 2-3 days trying to solve a problem but then the power supply finally died completely... installed a fresh supply and all was well.
Title: Re: Digidesign MH477 PCI Expansion Chassis
Post by: Custos on October 30, 2019, 03:04:58 AM: I've got a digidesign 7 slot pci chassis. It's got a host card in the chassis. What about the computer side though. What pci cards are compatible? Are the cables just normal scsi?
Title: Re: Digidesign MH477 PCI Expansion Chassis
Post by: Blzproductions on October 31, 2019, 01:11:21 AM: It requires a Host card in the Mac (a bit of research led me to the SBS host cards, as the Digi MH477 is just a rebadged SBS chassis), and a suitable cable.
I had everything apart from the card for the Mac which I now have, but I don't have any manuals, so not sure if I need to move any jumpers on the host card or not.
Title: Re: Digidesign MH477 PCI Expansion Chassis
Post by: IIO on October 31, 2019, 03:30:08 AM: i´ve never tried - but often been told that only the 13 slot chassis will work as generic PCI expansion for OS9.
Title: Re: Digidesign MH477 PCI Expansion Chassis
Post by: mrhappy on October 31, 2019, 08:22:14 AM: Quote from: Blzproductions on October 31, 2019, 01:11:21 AM
not sure if I need to move any jumpers on the host card or not.

I have a few different chassis (Magma and SBS) and have never moved any jumpers... in fact I didn't even know that there were any jumpers that COULD be moved or have I ever heard any mention of jumper settings on a chassis or associated card!!
Title: Re: Digidesign MH477 PCI Expansion Chassis
Post by: mrhappy on October 31, 2019, 08:36:41 AM: So I just took a look at my spare SBS host card (21-100-2) and I see that there are 2 rows of jumpers on there! On the top 3 jumpers labeled J2, J5, J6... pin 1 is open and pins 2 and three are jumped. On the bottom 2 jumpers labeled J3 and J4... pins 1 and 2 are jumped and pin 3 is open.

I'm pretty sure that I've tested this card and It functioned properly (wouldn't bet my life tho! :)).

Like I said, I've never heard mention of jumper settings on these cards for use in a ProTools environment, however... if something can be moved there's someone out there that will move it!! Haha!
Title: Re: Digidesign MH477 PCI Expansion Chassis
Post by: Blzproductions on November 01, 2019, 04:41:31 AM: Thanks for those jumper settings.
Will compare to the settings on mine.