bryant@comp.lancs.ac.uk (Michael Bryant) (05/03/91)
I am wanting to get some fun (music etc) out of an A1000 I've had around
for a while on a dedicated task. It's usually attached to a 1060 Sidecar,
which has some uses - notably access to a hard-card on the PC side.
The problem is lack of memory, particularly when driving the Sidecar, as
the 1000 only has its original 512K. What I want is some CHEAP expansion
options.
Accessory support for the 1000 seems almost non-existent in UK ads.,
although there are endless tantalising ads. for A500 512K expansion boards
at manageable prices (c#30).
Am I being too naive in supposing there must be some reasonably
straightforward relationship between the A1000 expansion bus and the A500
trap-door socket? I don't mind wielding a soldering iron, so if it were
only a matter of a few decoder chips etc., I'd be keen to try a DIY job on
linking up an A500 memory board. The A1000 bus is passed through to a
socket inside the Sidecar, so it could even be housed there.
So the kind of help I need:-
* Are there any DIY circuit plans/diagrams etc. for the kind of
project I've outlined?
* Does anyone have info. on the A500 trap-door connector (and ideally
how it relates to the expansion bus)?
* Are there any UK sources for memory expansion actually intended for
the Sidecar (its manual talks of 1Meg boards being available), or
DIY versions of this approach?
* Any other ideas?
Thanks.
---------------------------
Michael Bryant bryant@uk.ac.lancs.comp
Department of Linguistics
University of Lancasterdrysdale@cbmvax.commodore.com (Scott Drysdale) (05/04/91)
In article <1279@dcl-vitus.comp.lancs.ac.uk> bryant@comp.lancs.ac.uk (Michael Bryant) writes: >I am wanting to get some fun (music etc) out of an A1000 I've had around >for a while on a dedicated task. It's usually attached to a 1060 Sidecar, >which has some uses - notably access to a hard-card on the PC side. > >The problem is lack of memory, particularly when driving the Sidecar, as >the 1000 only has its original 512K. What I want is some CHEAP expansion >options. > >Accessory support for the 1000 seems almost non-existent in UK ads., >although there are endless tantalising ads. for A500 512K expansion boards >at manageable prices (c#30). > >Am I being too naive in supposing there must be some reasonably >straightforward relationship between the A1000 expansion bus and the A500 >trap-door socket? I don't mind wielding a soldering iron, so if it were >only a matter of a few decoder chips etc., I'd be keen to try a DIY job on >linking up an A500 memory board. The A1000 bus is passed through to a >socket inside the Sidecar, so it could even be housed there. > >So the kind of help I need:- > > * Are there any DIY circuit plans/diagrams etc. for the kind of > project I've outlined? > * Does anyone have info. on the A500 trap-door connector (and ideally > how it relates to the expansion bus)? > * Are there any UK sources for memory expansion actually intended for > the Sidecar (its manual talks of 1Meg boards being available), or > DIY versions of this approach? > * Any other ideas? in general, a peripheral that plugs into the A500's expansion connector will work on the A1000 if you spin it around (top-bottom orientation the same, left-right/front-back orientation reversed). unfortunately, the sidecar supposedly doesn't work with other autoconfig peripherals on the bus (i haven't tested this, but it wouldn't surprise me at all). it's not a matter of noise or loading or anything, it just assumes it's the only autoconfig thing on the system. so your best bet is one of those internal ram expansion things (insider, in1000, etc) that don't *really* autoconfig, but are detected by exec anyways. check for spirit technology advertisements: they've got plain ram expaners that go inside the machine as well as a SCSI plus RAM plus floating point processor card that goes inside. they are located in salt lake city, utah (US). >Thanks. >--------------------------- >Michael Bryant bryant@uk.ac.lancs.comp >Department of Linguistics >University of Lancaster --Scotty -- =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= Scott Drysdale Software Engineer Commodore Amiga Inc. UUCP {allegra|burdvax|rutgers|ihnp4}!cbmvax!drysdale PHONE - yes. "Have you hugged your hog today?" =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
monty@sagpd1 (05/08/91)
In article <21240@cbmvax.commodore.com> drysdale@cbmvax.commodore.com (Scott Drysdale) writes: >>The problem is lack of memory, particularly when driving the Sidecar, as >>the 1000 only has its original 512K. What I want is some CHEAP expansion >>options. The CHEAPest way to add 512K to a A1000 is the piggy back memory hack. It cost less then $70 (usually) - depends on the cost of 256kx4 parts. This and the Haynie autoconfig mod are the least expensive method of adding 512K, but require soldering iron expertise and experience with multi-layer PC board re-work. Along this note, I must apologize to Glen Montgomery and one other individual about not sending back the copies of the above hack and other mods. I have been extremly busy with personal bussiness and have not sent out your packages. The good news is that I now have electronic versions of all the pieces and will get a package together and post it to the binaries group RSN :) I will still send hard copies to those who desire though. Requests to: (please include 8 1/2 x 11 stamped, self addressed, envelope) Monty L. Saine 4551 Piute Pl. San Diego, Calif. 92117