#A3000 tech questions
4 messages in this thread
I am a longtime owner and user of the A1000, but am now seriously
considering an A3000 or even an A2000. However, I have some very serious
questions about the capabilities of the A3000 and whether it will fit my
needs better than a A2000 or IBM-compatible clone. I would also like
anyone's opinion on the subject of running both MS-DOS and AmigaDos
together as well as any suggestions or problems users might have
experienced in the past using this type of system. Also interested in any
configurations now being used by both A2000 and especially A3000 owners
using the dual operating system with either a 286 or 386 bridgeboard on
their machine.
Please excuse my lack of knowledge on some these more technical aspects
of the Amiga 2000 hardware as well as software, for I have been using an
A1000 for so long that I've forgotten most of the details.
1. Does the A3000 work properly with a 386 (such as the PC Elevator board)
or even a 286 bridgeboard made by Commodore the way they would on an A2000?
Does Commodore plan on making a 386-based bb in the near future or are we
stuck at the 286 level for awhile? I've heard that neither board works as
of yet with the A3000 computer for whatever reason I'm not sure.
2. Does AmigaDos 1.3/2.0 work with MS-DOS files on the same hard drive (in
different directories I imagine) or is a separate drive necessary
altogether?
3. Is memory shared by the two operating systems or are 2 megs, for
example, needed in conjunction with a 286/386 bridgeboard in addition to
Amiga chip & fast memory? Assuming they are run one at a time.
4. Can AmigaDos 1.3/2.0 run at the same time as MS-DOS without problem?
Say, run MS-DOS in a window of AmigaDos?
5. What previously written software for AmigaDos 1.2/1.3 work on AmigaDos
2.0?
Thanks for all your help!
Alex
Okay, in order:
1) Commodore has not announced a 386 Bridgeboard product. _One_ foreign
developer told me last year that he had seen a 386 Bridgeboard being worked
on by Commodore Germany. This has never been confirmed from a second
source. The A3000 chassis is little-and-lovely rather than hefty-hefty,
and is thus ill-suited to the buy-one-of-everything eight-slot MS-DOS
approach to life. It appears straightforward to extend the A3000 chassis
to provide additional Janus slots, if you are an electrical engineer. You
need to be an electrical engineer or a Canadian in order to use the
existing Bridgeboards with the A3000, since their software requires a 5.25"
drive for installation, and the 5.25" drive doesn't fit inside the A3000
case. It is said (but not confirmed) that Commodore Canada has
Bridgeboards that do not require the 5.25" drive.
2) The Janus libraries allow AmigaDOS and MS-DOS to share a hard drive.
Janus utilities are provided to let you copy files from one system to the
other. Extensions to the Amiga file system which would allow you to call
up MS-DOS files and Amiga files with the same file requester have been
mentioned as possible 3rd party products.
3) The Bridgeboard has its own memory, and can use the rest of Amiga memory
only by the somewhat fishy means of creating an MS-DOS RAMdisk in Amiga
memory and then running an MS-DOS Expanded Memory Emulator which will treat
the RAMdisk as MS-DOS Expanded memory. If that's too strange, the AST
RamPage board works nicely with the AT Bridge.
4) The Janus libraries bring up MS-DOS in a window on the Workbench screen
or on a custom screen, and permit easy cut-and-paste between the two.
5) Most 1.3 software works on AmigaDOS 2.0. Main exceptions _today_ are
animation programs (due to a feature Commodore added very late, which will
be changed).
THol() { cout << "Sir, I exist." ;}
Alex,
1. yes, some folks have reported problems with running a
bridgeboard with an A3000. Others have reported no problems. Yes, I
believe the PCElevator does work with the BridgeBoard, but I know of no one
with an A3000 plus PC accellerator so can't give you a definate answer if
that specific combination has been known to work or not.
No idea on a 386 BB from Commodore. Rumor has it that they are
working on one…but NO official word from Commodore.
2. Yes, both MS-DOS and AmigaDOS can share a hard drive…either
way, that is…AmigaDOS can use a hard drive hooked to the MS-DOS side, or
MS-DOS can use a hard drive hooked to the Amiga side. AmigaDOS can not be
booted from an MS-DOS side HD, since AmigaDOS must be running before you
can access the BridgeBoard; however, the BridgeBoard CAN be booted from an
AmigaDOS side hard drive.
If the Amiga is using an MS-DOS side hard drive…it's a separate
partition. If the MS-DOS side is using an Amiga side hard drive, it simply
one large file under AmigaDOS…it doesn't have to be a separate partition.
Be aware…a shared hard drive is relatively slow when compared to
a hard drive directly hooked to the appropriate side.
3. NO, there is no shared user memory. There is 128k of dual
ported memory…attached to either side…but that's used for side-side
communication and also as the video RAM of the MS-DOS side. It is not what
you would call "user" memory…it is not available for any other use.
continued…
continuation…
4. AmigaDOS and MS-DOS are totally separate…neither affects the
other, so yes…you can run both at once. MS-DOS, when sharing the Amiga's
monitor does in fact *display* in a window…it *runs* on the BridgeBoard.
You can add a separate display adapter and 2nd monitor if you desire
something other than CGA or MDA.
5. Most 1.2/1.3 software works under 2.0. Since 2.0 is not final
yet…a specific list (were one available) can not be given of what works
and what doesn't.
Don