17 May
2013
17 May
'13
12:58 p.m.
Am 17.05.2013 21:18, schrieb Jim Stephens:
are your resources up to doing a custom system board
with one of the FPGA's to
do your own 8?
Yes.
The STG 6120's seem to be tapped out and there is
a lot of demand
for systems which run the 8. Could lead into a version of the blink'n lights
front panel.
I don't know about the back end, but a full system would be nice, that is
include enough in the design to support the disk, tape, papertape and terminals
if one wanted to.
I once made a raw pdp8/e CPU in an FPGA. it passed the maindec
tests and there
is a TTY interface connected to a kind of SoC Omnibus. There used to be data
break support as well. But:
- It's not cycle accurate - the CPU implementation is not even similar to the
original.
- On Spartan-3 it runs approximately 120 times faster than the original.
- currently has no front panel support (except something strange that comes out
of the VGA port, hehe)
Doing a whole system is much work. Weeks of work. Probably even months.
But I would be able to do it. I could even silkscreen print my own front panel,
hehe :-)
Doing an FPGA 8 that implements TTY, PTP/PTR, and RK05 on chip would be less
work than creating something that interfaces to a real Omnibus.
--
Dipl.-Inf. (FH) Philipp Hachtmann
Buchdruck, Bleisatz, Spezialit?ten
Alemannstr. 21, D-30165 Hannover
Tel. 0511/3522222, Mobil 0171/2632239
Fax. 0511/3500439
hachti at hachti.de
www.tiegeldruck.de
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