13 Dec
2013
13 Dec
'13
2:21 p.m.
> I am attempting to get Helios running on a
64-core T805-based Transputer
> array. This is a one-of-a-kind system with a custom case. It uses a
> single-board 486DX with 8MB of RAM on an ISA card for the host system. The
> PC front end runs Windows 3.1 or MS-DOS 6. There are eight T805s on eight
> custom cards. It doesn't use TRAMs, but I have a feeling these are wired
> like such on the board. Pictures of the system can be found here:
The circuitry probably is very similar to the TRAMs. The external
connectiosn ot a TRAM are the 4 transputer links, the reset/error/analyse
signals, a 5MHz clock inotu and power. No other trasnputer signals
(AFAIK) are brought out.
The T805 IIRC has an intenral DRAM controller. It will generate the RAS/,
CAS/ and address multiplex signals. All you have to add to link up DRAM
is the address multiplexer and maybe an address latch. Most 'compute'
TRAMs (That is, ones without special I/O devices like SCSI, HPIB or
ethernet) are jsut that.
It is very likely that;s what is done on your boards too.
One many TRAM motherboards the links go to C004 link switches so you can
configure the network as you like. It sounds like you have those too.
And given that, there aren't many other ways it could be wired.
-tony