superjer2000
Well-known member
This is super cool - I haven’t ever seen these before. Seems like a potentially interesting way to add external video to the SE/30 using readily available NuBus video cards.
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Adding 8 slots to my Compact Mac
- Thread starter CompactManiac
- Start date
CompactManiac
Well-known member
Yes it would have given the SE/30 access to all of the cards available for Nubus.
Even for an SE model the idea of 4 SE PDS slots is mind blowing providing the possibilty for acceleration, a 2 page monochrome display card, 24 bit colour display card, a DOS emulator card or a network card!
Realitystorm
Well-known member
Looks like the company also made a PCI to Nubus bridge, and there was a requirement for 32-bit clean applications.
The closest thing I found to a technical note so far is:
7.2.1.4 PAL DEVICE. A 16L8 PAL is used to generate chip select signals to the DDLC and '374 address expansion register. The base address of the DDLC is 520000h and the address of the address expansion register is 528001 h. 520000h was chosen as the base address because it is in an area that does not have RAM and is not used for Apple factory testing (DC&D 13-16). The PAL also generates an inverted MCLK for the DDLC. When the card is installed in the Second Wave ExpanSE chassis (available from Second Wave, Austin, Texas, (512) 343-9661) the inverted clock is not used and MCLK is connected directly to the C8M signal of the chassis. From: 1989 MC145488 Dual Data Link Controller
The closest thing I found to a technical note so far is:
7.2.1.4 PAL DEVICE. A 16L8 PAL is used to generate chip select signals to the DDLC and '374 address expansion register. The base address of the DDLC is 520000h and the address of the address expansion register is 528001 h. 520000h was chosen as the base address because it is in an area that does not have RAM and is not used for Apple factory testing (DC&D 13-16). The PAL also generates an inverted MCLK for the DDLC. When the card is installed in the Second Wave ExpanSE chassis (available from Second Wave, Austin, Texas, (512) 343-9661) the inverted clock is not used and MCLK is connected directly to the C8M signal of the chassis. From: 1989 MC145488 Dual Data Link Controller
78759... Heh. I live less than 5 minutes from where their office was way back when.
Phipli
Well-known member
Can you do me a favour? Go and knock on the door and see if they have a couple left over in the back of the stationary cupboard
I'll get in my time machine and get right on that.Can you do me a favour? Go and knock on the door and see if they have a couple left over in the back of the stationary cupboard
Phipli
Well-known member
Excellent!
CompactManiac
Well-known member
The chasis by Second Wave that allowed you to connect your old Nubus cards to a newer PCI Mac was called Xpanse PN series and was available from June 1995.
Pricing at the time was $595 - $1895 for a 2-, 4-, or 8-slot NuBus expansion chassis.
I guess this was a way to market the same thing that had been around now for about 6 years as something new with the aid of the PCI adapter.
Pricing at the time was $595 - $1895 for a 2-, 4-, or 8-slot NuBus expansion chassis.
I guess this was a way to market the same thing that had been around now for about 6 years as something new with the aid of the PCI adapter.
CompactManiac
Well-known member
Searching Xpanse found this earlier 68k thread with some pics inside the box and the PCI interface card!:
68kmla.org
Second Wave"s PCI -> NuBus Expansion Box & Others
Very interesting peripheral hardware solution for the mixed use of Cards, Cards & Older Cards! }:)
68kmla.org
Realitystorm
Well-known member
And the URL of their site, nice find, https://web.archive.org/web/19980128161121/http://www.2ndwave.com/products/xpansion.html
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