The original mips design seemed to be basically mips+simm slots
Plus cheap onboard SCSI, serial ports, video, and perhaps ethernet.
on ISA bus and
Not on an ISA bus, but with an ISA bus for people who insist on
having PC-compatable expansion slots.
seems to have been dropped because of ISA limitations and board space.
IMHO, it seems to have been postponed because of
1. No suitable DMA/DRAM/peripherial controller is available -
the 3730 isn't shipping and the Visual MOM chipset lacks
support for slave mode DMA. (Has anyone looked at the
2. The 4200 would be faster, and should be cheaper than the
3081. Availability at this point is questionable.$
3. In 6-9 months, IDT ships the Orion, an R4000 compatable chip.
Also faster and cheaper than the 3081.
How about one simpler. Just a mips chip (whatever we can afford)+cache
on a vesa card.
It depends on what our goals are. IMHO, we need to clearly define what these
are before getting furthur into the technical aspects of things.
As I understand it VESA is basically the pc memory bus.
Running on the VESA bus at 25-33 Mhz will give you 100-128 MB/sec bandwdith
to memory, this makes a local cache important but seems workable.
Everything would be reused. People could buy the ISE/VESA card of there ch
A 486/25 sx is $215 or so would be used as a host.
For the people who want a "workstation", the motherboard solution
wins hands down.
+ $200 SCSI (You can't buy large IDE drives at any price)
+ $200 video (VRAM based local bus)
+ $50 16550 serial board
+ ethernet ???
Total : $615 + ???
Compared to a motherboard solution of
+ $90 main board
+ $25 SCSI
+ $20 (serial ports, either one of the integrated chips or a 16552)
+ $100 video (1M, VRAM based (ie, 1152x900x256) $60 for 2M )
+ ethernet ???
Total : $235 + ???