An update: Although I still expect there is an issue with that loop
count of 10 (0x0A), I went ahead and stuck my logic analyzer on it in
state mode just to see what, if anything, was going on.
The CPU is running and runs the program in the ROM as expected at first.
But the program gets to the
Oh, yeah I get it - an in circuit emulator. With my logic analyzer I
can also watch all the bus transactions (or directly on the CPU if needs
be) to see what is going on, as well.
I have an Intel MDS IV with an ICE for (IIRC) an 8051, but have never
used it for that purpose to date.
JRJ
On
The RL01/RL02 Users Guide (bitsavers.org/pdf/dec/disc/rl01_rl02) Figure
2-25 on page 2.35 describes the positioner restraining bracket that
should be put in place before shipping. It is just a little square
piece of metal (probably aluminum) with a single screw that holds it
down that sits in
In working on my ACS 8000-2, I managed to dump the ROM and started
disassembling it, and almost immediately came up with something strange
(see below). As a result, it is not surprising the machine is totally
confused.
If anyone has an Altos ACS 8000, models 1 thru 4 or 1S thru 4S, that is,
an
no not a software emulator a hardware emulator you remove the Z80 and
plug in a cable
lets you step through the code test memory and run the board at full speed
hardware emulators are for the debugging of the hardware.
unlike software emulators that run on a host PC that let you run old
software
J. Victor Nahigian donated some M221 and M222 boards for the processor and
TC12 LINCtape controller. They are in pretty bad condition, but are
repairable. Warren wrote a test program for the M222 boards, and some of
the just donated boards actually work OK. It will be nice to have some
spares.
heh thats way more work than a plug in emulator
good luck on it
On 7/11/2015 2:49 PM, Jay Jaeger wrote:
Oh, yeah I get it - an in circuit emulator. With my logic analyzer I
can also watch all the bus transactions (or directly on the CPU if needs
be) to see what is going on, as well.
I
Very good explanation, Tony!
Is there any chance that he might need to worry about a pack being inside the
drive with the heads un-parked, e.g. from an abrupt power failure?
--
Mark J. Blair, NF6X n...@nf6x.net
http://www.nf6x.net/
Excellent descriptive instructions. Ill print them out. Thanks.
On Sun, Jul 12, 2015 at 9:21 AM, tony duell a...@p850ug1.demon.co.uk wrote:
Thank you all for the excellent information. I think i have a pretty
clear
idea on what im dealing with now. Quick question though, what if there
is
The RICM Learning Lab was nice and cool today so we spent the afternoon
chasing the LGP GP=GPC PRESET in the TC12 LINCtape controller. With a
logic analyzer connected to lots of the TC12 signals were were able to
chase down the signal that is causing the fault. We are now not sure if the
signal
Very good explanation, Tony!
Is there any chance that he might need to worry about a pack being inside the
drive with the heads un-parked, e.g. from an abrupt power failure?
I would hope not (IIRC all DEC drives are designed to retract heads if the
power fails). If the heads are still
On 2015-07-12 13:55, Jörg Hoppe wrote:
Hi,
I have an broken DEC PC05 puncher unit here.
It seems the shaft which transfers motor power to the excenter mechanism
is broken in the inside.
So i need to dissassemble the whole unit, but have no idea where to start.
I've read somewhere the
Thank you all for the excellent information. I think i have a pretty clear
idea on what im dealing with now. Quick question though, what if there is a
pack in the drive? What holds the pack in there? Can the pack be removed
without power?
Believe-it-or-not the pack is held to the spindle by
Hi,
I have an broken DEC PC05 puncher unit here.
It seems the shaft which transfers motor power to the excenter mechanism
is broken in the inside.
So i need to dissassemble the whole unit, but have no idea where to start.
I've read somewhere the mechanical puncher unit is not made by DEC but
On 2015-07-12 15:40, Jörg Hoppe wrote:
Am 12.07.2015 um 14:40 schrieb Johnny Billquist:
On 2015-07-12 13:55, Jörg Hoppe wrote:
Hi,
I have an broken DEC PC05 puncher unit here.
It seems the shaft which transfers motor power to the excenter mechanism
is broken in the inside.
So i need to
And which of those manuals covers the punch mechanism? Did you bother to
read
any of them before flaming?
Yes, I did check. The first manual in that list do cover it in some detail.
It covers the reader, but there is very little information on the punch
mechanism. Certainly
no
Am 12.07.2015 um 14:40 schrieb Johnny Billquist:
On 2015-07-12 13:55, Jörg Hoppe wrote:
Hi,
I have an broken DEC PC05 puncher unit here.
It seems the shaft which transfers motor power to the excenter mechanism
is broken in the inside.
So i need to dissassemble the whole unit, but have no
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