7 Nov
1999
7 Nov
'99
2 a.m.
Where is the color frame buffer normally placed
relative to everything
else in a Vaxstation II/GPX ? (everything else being defined as ethernet,
TQK70, disk, and async muxes)
According to the Vaxstation II/GPX hardware manual, the correct
sequence of boards is:
1) CPU
2) Memory
3) Ethernet interface
4) VCB02 base
5) VCB02 memory
6) VCB02 memory
7) Async comm (DZQ)
8) Asyn multiplexor (DHV)
9) Sync Comm (DMV)
10) Disk controller (RQDX3)
11) Tape controller (TQK50)
But I have always placed the disk controller after the ethernet
interface and before the VCB02... it puts the controller electrically
closer to the CPU, which should make disk I/O a little faster (I know,
almost infinitesimal, but the delay has got to be measurable, and
adds up over time).
Megan Gentry
Former RT-11 Developer
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