19 Apr
2020
19 Apr
'20
12:29 p.m.
So I picked up an 11/84 CPU, 3mb of memory, and a 11/84 Unibus card on
Ebay. Goal is to speed up my fastest 11 here
For boot time, the diagnostics run in 13 seconds (from when it starts to
prompt) on the 11/73 board I have and 13 seconds on the 11/84 board.
This is with a camintonn 2mb half height memory board.
Put in the first PMI module above the 11/84 CPU and tried it out. This
is a CA rev board which apparently only works in a Unibus pdp11 and not
a Q-bus one. Apparently it does work.
So what exactly was the bug with the older PMI memory? Block mode DMA,
I'm using an MTI ESDI controller which can do 16 word block DMA on Q
Bus. Something else?
Here's the output from RT11.
.show all
RT-11FB (S) V05.05
Booted from DU6:RT11FB
USR is set SWAP
EXIT is set SWAP
KMON is set NOIND
TT is set NOQUIET
ERROR is set ERROR
SL is set OFF
EDIT is set KED
FORTRAN is set FORTRA
KMON nesting depth is 3
Global .SCCA flag is disabled
PDP 11/83 Processor
2048KB of memory
Floating Point Accelerator Unit
Extended Instruction Set (EIS)
Memory Management Unit
ECC Memory
Cache Memory
PMI Memory
60 Cycle System Clock
Device I/O time-out support
Error logging support
Memory parity support
System job support
Global .SCCA support
FPU support
Extended unit support
Device Status CSR Vector(s)
------ ------ --- ---------
EL Not installed 000000 000
LD Installed 000000 000
BA Installed 000000 000
DY Not installed 177170 264
VM Installed 177572 250
SP Installed 000000 110
XL Not installed 176500 300 304
DL Installed 174400 160
MS Not installed 172522 224
DU Resident 172150 154
LS Not installed 176510 310 314
NL Installed 000000 000
TT (Resident)
DU (Resident)
DU6 = DK , SY
MQ (Resident)
LD
DL
VM
SP
BA
NL
9 free slots
Job Name Console Level State Low High Impure
--- ---- ------- ----- ----- --- ---- ------
0 RESORC 0 0 Run 000000 103232 105046
No multi-terminal support
Address Module Words
------- ------ -----
160000 IOPAGE 4096.
132174 DU 5570.
103274 RMON 5856.
001000 ..BG.. 16990.
LD0 is DU6:RTTST.DSK[6000.]