Mac Plus upgraded hyperdrive 2000

[techknight]

I decided to pull out and take apart the Mac Plus Hyperdrive 20 machine to see whats inside, This is the machine i picked up from the rack full of compacts at the Dayton Hamvention

The back said HyperDrive 2000, so i was like oh boy....

I took the back off, and there was no drive inside, awww..... BUT not to despair. They left the board in there. and its the HyperDrive 2000 board. The machine did NOT boot, it powered on to jailbars, no beep. So no idea whats going on.

So even though the drive is missing, at least its a glorified RAM upgrade + accelerator.

 

[techknight]

Couple more pics

 

[Theretrogamingroom]

Try sticking the motherboard in the dishwasher (And remove the Ram and Pram of course).

 

[techknight]

the hyperdrive card wasnt seated properly i guess.

once i seated it back into place, it fired right up. boots to floppy. But since i dont have the drive, or cables, its kind of useless.

i think it takes a standard MFM HDD? anyone have setup utilities for the hyperdrive?

 

[mcdermd]

Similar to the older MacSnap upgrades where it simply snaps over the top of the original logic board. Interesting plastic socket that goes over the processor. Are the bare pins on the edge for a 50 pin ribbon?

 

[bibilit]

Interesting plastic socket that goes over the processor

i was told, ribbon for the 20 Mo hardisk of the hyperdrive was directly connected to the processor.

i think it takes a standard MFM HDD? anyone have setup utilities for the hyperdrive

can this help ? http://forums.macrumors.com/showthread.php?t=422001

from one of the links, the HD was seen as fragmented floppies by the mac.

 

[Trash80toHP_Mini]

Check the traces on the PCB, that's not a HDD connector at all. it's a 68000 PDS Passthrough for another PDS device!

Check the board for copyright & mfr. designation!

Methinks it's something on the order of a MacSnap Accelerator and that the missing Hyperdrive 2000 Interface Card was the device hooked up to that passthru 68k PDS.

Just a guess . . . based on a cursory inspection of the PCB traces.

Methinks it's time to pull out the ole' continuity tester!

 

[H3NRY]

Looking at the pictures, you have a Plus and a 68030 accelerator with FPU. The 64-pin connector on the side might be a CPU passthrough. Right number of pins. That's a Plus motherboard, and Hyperdrives for the Plus are ordinary SCSI drives mounted inside the case. The bracket held a drive, fan, and a small power supply. There was a Killy clip similar to the one on the 68000 but smaller which snapped onto the SCSI controller chip and led up to the disk drive. I don't know if the older MFM Hyperdrives would work in a Plus - they might. In any case you don't have the MFM controller board there. At least you have a very fast Mac Plus with Hyperdrive and government security labels on it, so it's cool and should impress the hoi polloi.

 

[techknight]

eh, oh well. at least it has an accelerator.

there is something still wrong wtih the machine though. If i attach an external SCSI drive, the machine boots, to a gray screen, then the gray screen goes black and nothing but static out of the speaker. sometimes youll get a screen to come back on to garbage, sometimes not. sometimes itll reset and bong again.

only with the SCSI drive attached though.

 

[Trash80toHP_Mini]

OOPSIE!!!!! I missed that whole Mac Plus part . . . :

Accelerater + RAM = waaayyyyy more than an internal SCSI HDD! [] ]'>

 

[Bunsen]

Nice score Does it floppy boot, with or without the accelerator? (Owait ... is the 68000 still there?)

sticking the motherboard in the dishwasher

... is emphatically not the answer to every problem, nor the first thing to try on every not-perfect Mac.

 

[techknight]

works fine from floppy and sees all 4MB of RAM with accelerator in place.

if SCSI drive attached, it kills the board. its not the board, i tried my other mac plus board, same thing. so its gotta be power supply/analog board.

 

[Bunsen]

Internal SCSI drive attached? Yeah, that sounds like a power supply problem. Tried an external?

 

[techknight]

no internal SCSI drive. no way to put an internal SCSI drive in.

this is external.

 

[Trash80toHP_Mini]

Then check for broken/cold solder joints on the external SCSI Connector, the surrounding traces & digital glue. Lost of folks were very clumsy about how they handled upgrade hardware, the cases of compacts got way full and boards got banged around and torqued outta' shape.

There were many fumble fingered "mavens," back in the day, who shouldn't have been allowed to install a freakin' SIMM, much less have access to, let alone own a multimeter!

If 9" B&W CRT's were seriously dangerous, it might have helped to clean out the gene pool a little bit! :lol:

 

[H3NRY]

Are you sure your SCSI drive has a system that will boot a Plus? The symptoms sound like a software crash. There may also be some oddities about booting a Plus with a 68030 chip. What happens if you boot from floppy with HD attached? Termination / term. power OK for a Plus? Remember the Mac+ doesn't supply term. power - the drive for a plus is finnickier than for other Macs. There's also the matter that a Plus uses software timing to read the SCSI interface, and a 25 MHz 68030 is going to be moving bits a lot faster than an 8 MHz 68000. It may be reading bits faster than the drive is spitting them out. You may need a special SCSI driver for that machine.

 

[Bunsen]

Are you sure your SCSI drive has a system that will boot a Plus? The symptoms sound like a software crash.

Good point. I assume one would also need drivers for the upgrade in that System?

 

[Charlieman]

I reckon that a 1:1 interleave on a fast disk will sort out the SCSI problem. Most Mac SCSI problems have been sorted out by newer, faster disks. Term power can be provided on the disk and chain termination isn't necessary if the internal disk is the only device (ugly, but it will work). Mid-chain termination may be required if external devices are going to be used.

 

[techknight]

Well, the drive i tried was formatted with HWT toolkit, so its very possible. Does the same thing with or without accelerator, between two mac plus boards.

Maybe its a TERMPWR issue?