MEMORY EXPANSION
7 messages in this thread
Lance:
What memory expansion are you using. I had the same problem
with a COMSPEC/AX2000. I had to purchase an upgrade for $15.00
consisting of a 1/2" square circuit board with a 555 timer and
a few other bits. Cut one etch; carefully solder a jumper; and
reinstall the memory expansion. I did not get a full explanation.
I think the 555 timer is bypassing some kind of reset signal.
Whatever…it fixed the problem for me. ASDG leads one to believe
that all memory supports a recoverable ram…this is obviously
not the case.
Good luck
Michael
Wooooe. ASDG Does Not Lead One To Believe All Memory Supports
Recoverable Ram. Only well designed memory boards support rec-
overable ram.
Perry
PERRY
well designed memory boards conform to original manufacturers
specifications for expansion hardware. My COMSPEC board is
one of the originals.
We are all aware of the new vs old Zorro specifications.
Besides: its a moot point. If I reset my machine, whether it
be HARD or SOFT, under normal circumstances I would not e<{pect
anything to survive. That's what reset means…
It seems to me someone has taken advantage of a quirk of the hardware.
Albeit a convenient quirk.
Comspec has only a few products on the market. But I'd swear by
them and recommend them to anyone.
By the same token I have a lot of respect for ASDG. They
are supporting the AMIGA in a way not many others care to try.
More power to them!
And that is that!
Michael
Michael,
There are 2 kinds of resets…warm-start and cold-start. A cold-start
should clear everything to 0, a warm-start should not clear everything to 0 but
merely initialize all system pointers to startup condition.
Don
Michael,
A couple of points.
(1) The Comspec board, though fairly well designed, attempts to pass the bus,
an optimistic undertaking at best.
(2) There is nothing in the manufacturers specification that states that any
memory should be clobbered with a Vulcan Nerve Pinch (CTRL-AMIGA-AMIGA).
(3) There is provision within the manufacturers specs for ram resident routines
that will survive said nerve Pinch.
From this, I would say that the Comspec, as delivered, came close to meeting
specs. They did correct the reset problem, and otherwise make a fine, if
somewhat costly, product.
Please don't take this as a condemnation of Comspec, but as an attempt to keep
the record straight.
Regards, Larry.
Larry,
Thanks: clarifications are always welcome.
Comspec's board was the cheapest one available at the
the time…If not the only one.
You see we have to live with a 75 cent dollar on
anything purchased south of the border.
Regards
Michael
Michael, we sure do. (I live in Vancouver).
Regards, Larry.