18 Jun
2012
18 Jun
'12
7:37 a.m.
On Mon, Jun 18, 2012 at 12:09 AM, Jay Jaeger <cube1 at charter.net> wrote:
Row of???
If you mean memory chips, the answer is yes. ?Then a blank row, then the the
next row of memory chips, and so on.
Yes, that's what I meant. I'm trying to figure out which row has the
lowest 16KB of memory (assuming they're not interleaved). I've tried
piggybacking 4116 chips onto the first and last row of memory chips to
no avail. I do not have enough 4116'es to do the entire board.
What does work though is the console interface. I can hit the reset
button and get the ? prompt. I can list the contents of registers and
memory. Is there a way to see which memory chips are suspect from this
output?
Bruce Ray at Wild Hare has been helping out too (off-list). He asked
for specific part numbers, so here goes:
Chassis : M0061411 D1882 P T005 12080 R67
NVR Supply : E0470375 D0882 P A005 12074 R26 T005 12429 R30
Backplane : E0502539 D1282 P A005 12072 R10 T005 12073 R10
0 - Supply : E0526152 D1682 P A005 12062 R48 T005 18878 R00
1 - CPU : E0471713
2 - RAM : E0752855
3 - DIABLO?: Rianda Electronics Assy No 020000-21H
5 - SERIAL?: E0859602 D0683 P A005 2041 R16 T005 3523 R10
10 - TAPE : Western Peripherals TC120 Mag Tape Controller
12 - SERL? : LV0010629 D3883 P A2041 R16 T3523 R10
15 - SMD : ZETACO Model 295 Storage Module Disk Controller
It looks like the CPU and RAM have most of their identification codes cut off.
On the back of the backplane, the following connections are made:
1 - console port
2 - A-Side and B-Side terminators
3 - Two wide ribbon connectors ending in a 50-pin MRAC connector.
There's a hand-written label attached that reads:
Rianda Electronics
AC020075-002X-06
DIABLO SEP 85
This leads me to suspect that the Rianda card in slot 3 is a
diablo disk controller. Can anyone confirm this
5 - 20 pin card edge connector, 5 wires connected (A81, A85, B54, B69,
B99 as far as I can tell)
10 - 1 50-pin card-edge connector and 2 26-pin card edge connectors
12 - same as 5
15 - none, the ZETACO has its connectors on the front of the card
16 - two large connectors going to a 100-pin card edge connector.
There is a card that fits this with a hand-written label that reads:
879-0066-000A
Terminator
I/O Board
Rev. A - Term. I/O - 6
5-16-83
On the A-side of the backplane there are some wire-wrap connections
on pins 93-96:
4 : A94 - 5 : A94
4 : A96 - 5 : A96
5 : A93 - 9 : A93
5 : A95 - 9 : A95
11 : A94 - 12 : A94
11 : A96 - 12 : A96
12 : A93 - 14 : A93
12 : A95 - 14 : A95
Cheers,
Camiel