14 May
2012
14 May
'12
12:48 p.m.
Chuck Guzis wrote:
On 14 May 2012 at 17:05, Andriy Romanenko wrote:
Since we're talking VHDL here, how does the performance of the old
USSR chips differ from the performance of a modern FPGA
implementation, say, the W11A version of the PDP 11/70 on opencores?
Just curious,
Chuck
The old Cips are in the class up to the same as a J11 can do.
The K1801VM3 is internal 32bit Datapath and a MMU, The K1801VM2 has no MMU
but is clocked up to 20Mhz (internal 10Mhz) and should pretty fast for
small things. If you want to build an High Performance PDP11 this surely
isn't for you, bu I for example prefer to use "real Processors" not the
FPGA on the devel Board of the day to play with.
If I want high performace, I'm using simh.
Regards,
Holm
--
Technik Service u. Handel Tiffe, www.tsht.de, Holm Tiffe,
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...have
three of them and some VM2 too. I where interested in such a
project. Currently I'm trying to build ans SBC out of an VM2 with
some old Tesla MVB1012 Chips (AY5-1013?) and a CPLD...
could you share some schematics/soft/vhdl you have done for this
project?