Transtech Transputer, User Manual

Page: 54 / 200

Fitting TRAMs
46
Transputer Motherboard User Manual TMB M 711
5.1 Fitting TRAMs
Up to 4 size one TRAMs may be fitted to the TMB04, and the general
considerations discussed in section 2.2 apply. However note that:
• the TRAM sites are arranged sequentially (so pipe jumpers are
needed if you have TRAMs larger than size one),
• there are large components under the TRAM sites, so SIL spacer
strips are needed. When a TRAM is placed over the on-board
transputer (in slots 0 and 1), and the TRAM has components on
its underside, use of an additional set of spacers is
recommended to avoid overheating the transputer,
• there are no holes in the board, so the TRAMs cannot be secured
with nylon bolts.
5.2 Fitting memory
The TMB04 can be fitted with 4, 8, 12 or 16 SIMMs, which can be
either 256 KByte or 1 MByte. The board is normally supplied with 60
or 70 ns SIMMs. Memory should be expanded in the sequence
shown below - populating the SIMM slots in numerical order (the
numbers are printed on the PCB):
See section 5.3.1 below for setting the memory speed selection
switches.
Figure 39. SIMM slot numbering.
13 9 5 1 16 12 8 4 15 11 7 3 14 10 6 2