19 Dec
2017
19 Dec
'17
9:45 p.m.
There is a CPU board for sale on ebay, M8189, and it has the usual 3
chips CPU, MMU, FPU.? However, there are 2 extra chips and I've never
seen that before.
Anyone know what this is?
Ebay item 122867114663? - Vintage Mint Digital DEC M8189 CPU Module
Board KDF11-B
Doug
19 Dec
19 Dec
10:16 p.m.
On Wed, Dec 20, 2017 at 4:45 PM, Douglas Taylor via cctalk
<cctalk at classiccmp.org> wrote:
There is a CPU board for sale on ebay, M8189, and it
has the usual 3 chips
CPU, MMU, FPU. However, there are 2 extra chips and I've never seen that
before.
https://en.wikipedia.org/wiki/PDP-11_architecture#Optional_instruction_sets
Microcode ROMs for the CIS (Commercial Instruction Set)
20 Dec
20 Dec
5:58 a.m.
On Dec 20, 2017, at 1:16 AM, Nigel Williams via cctalk
<cctalk at classiccmp.org> wrote:
On Wed, Dec 20, 2017 at 4:45 PM, Douglas Taylor via cctalk
<cctalk at classiccmp.org> wrote:
I believe PDP11 COBOL makes use of those if available, and the RSTS kernel will use the
string move instruction for block memory copies if it sees CIS.
paul
There is a CPU board for sale on ebay, M8189, and
it has the usual 3 chips
CPU, MMU, FPU. However, there are 2 extra chips and I've never seen that
before.
https://en.wikipedia.org/wiki/PDP-11_architecture#Optional_instruction_sets
Microcode ROMs for the CIS (Commercial Instruction Set)
2559
days inactive
2559
days old
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