Panther 2 Cache Enabling
We are receiving a number of calls from end users reporting the fact
that when cache is enabled a blank screen follows.
To enable cache the following steps must be observed :
- SIMMs are correctly installed.
- GAL (Part Number 12256831) is correctly marked as 12256831 3D64 and is
located as PAL 2 (2nd PAL down from top near to SIMM sockets).
- SW2 - 1 on I/O PCB is set to ON.
If NO Cache SIMMs are fitted, then the GAL (Part Number 12333331) fitted
in location PAL2 is marked PENC002D and S/W 2 - 1 is set to ON.
When the Cache is to be fitted steps 1 to 3 MUST be carried out.
If the machine still appears to be faulty then it is advised to check
that the cache SIMMs are the correct ones. SIMMs found to be incorrect will be replaced
providing they are still in the 90 day DOA period.
The reason why this problem occurs is due to a number of machines were
delivered in Q4 of 1994 without the cache SIMMs fitted. |
