15 Sep
1999
15 Sep
'99
12:34 p.m.
On Thu, 16 Sep 1999, Tony Duell wrote:
You're right, as always Tony! they are in fact 72 chips. I counted 8
groups of 9 chips, and by the time I got to they keyboard with
all that info to type, I mangled the numbers in my mind.
16 groups of nine in this case.
Yes, an RS232 console port. The trap is that it is not
the same pinout as the
PC/AT DE-9 serial ports. I can't remember the pinout, but it shouldn't be
that hard to find ground, TxD and RxD
Thanks Tony. Clint has already provided me with the pinout. I'll have
to wait until tomorrow to get the connectors, though.
2 nemonix
memory board, holds 56 TC511000AP-10 chips
IIRC, each of thos chips is 1Mbit. So that would appear to be 7Mbytes
with no parity or error correction at all (????). Seems a little strange.
Even though there is 1 Mbyte on the CPU board, so 7Mbytes could be
possible. Only problem is, surely the memory needs to be 32 bits wide (so
I would have expected a multiple of 32 or 36 (parity on each byte) here). 3 dec
memory board, holds 144 41256-212141302 chips
DEC 4Mbyte memory board, I think. Much more likely to be MFM than RLL. IIRC that board
handles MFM hard
drives and RX50 floppy drives.
Yes an MFM hard disk -- Micropolis 1300-something
IIRC. Well known for
developing mechanical problems which may be fixable...
Which if the drives that Dave mentioned is considered reliable?
(repeated below)
RD50 5mb Seagate ST506
RD51 10mb Seagate ST412
RD52 35mb Quantum Q540
RD53 71mb Micropolis 1325
RD54 159mb Maxtor XT-2190
RD31 21mb Seagate ST225
RD32 42mb Seagate ST251
Carlos.