5 Jun
2012
5 Jun
'12
1:37 p.m.
On Tue, Jun 5, 2012 at 9:37 PM, Jos Dreesen <jdr_use at bluewin.ch> wrote:
On 06/05/2012 12:41 PM, Camiel Vanderhoeven wrote:
2900 bit-slice.
Sure of this ?
My P856 ( 12nc 5111 100 05701 ) and P857 ( 12nc 5111 100 05702 ) CPU boards
definitely have 4 x74181 datapath, and 6 x 82s115 PROM microcode.
That would mean Philips reimplemented the same CPU twice.
Somehow it does not surprise me...
My MCU3 boards also have a different 12nc number compared to yours. ( 5111
100 05582 )
I found that each board has two numbers: 5111 100 xxxxx which is
etched onto the board, which seems to be the part number for the bare
circuit board. Then a second number on a sticker (which can get lost
of course), 5111 199 xxxx with small numbers 1 - 9 printed above it
for the last number, which is the revision. This seems to be the part
number for the populated board. I've seen examples where the PCB has
the same 100 number, but where the 199 number differs because not all
components have been fitted.
The MCU3 board number you mention is on my MCU3's as well (although
some are 05583, which appears to be a higher pcb revision).
I have both 856/857 CPU's and 858/859 CPU's. The 856/857 ones are
74181 based, the 859 ones are 2900 based. The service manual describes
the 858/859 CPU as "the refreshed Belier version of the P857M CPU".
The 859 includes some features the 857 doesn't have: MMU and two IOP's
built into the CPU card, and some additional instructions. I have no
clue what "Belier" means
My 856/857 CPU's all use the 5111 100 05702 PCB (same as yours, marked
CPB on the card), but the 199 part numbers are all different: 5111 199
74979 (has a hand-written label that says "P856 CPU"), 5111 199 76227
and 5111 199 63142 (label says CP7B).
Of my 858/859 CPU's, some are CP7R and some are CP7RA. I don't know
what the difference between these two is. The difference between the
858 and the 859 is whether a front panel with lamps and toggle
switches is fitted (858) or a front panel with fluorescent hexadecimal
displays and pushbuttons (859).
. ? ? ? ?2 x CP7R : 5111 199 67589 (P857R CPU for P858,P859)
. ? ? ? ?3 x CP7RA : 5111 199 62019 (P857R/A CPU for P858,P859)
What technology does this CPU use? 2900 bit-slice, ASICs, or what? The
P854 CPU is 3 cards, I think, one of which is the MMU (and one of the
others an IOP?, I would have to check the manuals). The P851 CPU is
a signle board, using Philips bitslice ICs... If your documents list a LSM16 board, I'd like to
know what it is. That's a
mystery board I have .
(12nc 5111 100 06641 )
Haven't come across this, will let you know if I do.
Camiel