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tregare

HID disk interface.

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anyone know of a source for the fabled HDI disk interface?

 

*Edit alert! :sad: (sigh, lysdexia strikes again) should have been HDI not HID.

Edited by tregare

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Hmm,

 

you mean something like this:

http://www.atari-central.de/floppyservice/floppy/gb/hdi.htm

the floppy interface is not only sold out, some of its parts are no longer being made, so at the moment there is no chance to re-build this interface without changing the design (and the required parts).

 

Think if you send an e-mail to its creator Erhard Puetz he will send you schematics and source-code to his HDI.

On the other hand, Candle wants to create a new hardware for the A8 that houses a hard disk and a flash-chip at the same time and there are already various SIO2xxx devices (SIO2SD, SIO2USB, SDrive, etc.) for the A8 so there is no need for this disk-interface anymore (in my opinion!)... But if you still want a floppy drive, why not buy an XF551 with 360k 5,25" drive or turn the XF into a 720k 3,5" drive...?!?

 

-Andreas Koch.

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Hmm, attaching a file in edit mode doesn't seem to work so an extra post...

 

The schematic of the HDI is in TIF format but I had to ZIP it since TIF's are not supported over here.

post-3660-126713198797_thumb.jpg

sch_hdi.zip

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It was made by Erhard Puetz, member of ABBUC and owner of http://www.atari-central.de/

 

AFAIK the required floppy controller is not available anymore, anywhere...

 

 

I can probably dig up a compatible chip... it depends on what chip it uses.

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Hmm,

 

you mean something like this:

http://www.atari-central.de/floppyservice/floppy/gb/hdi.htm

the floppy interface is not only sold out, some of its parts are no longer being made, so at the moment there is no chance to re-build this interface without changing the design (and the required parts).

 

Think if you send an e-mail to its creator Erhard Puetz he will send you schematics and source-code to his HDI.

On the other hand, Candle wants to create a new hardware for the A8 that houses a hard disk and a flash-chip at the same time and there are already various SIO2xxx devices (SIO2SD, SIO2USB, SDrive, etc.) for the A8 so there is no need for this disk-interface anymore (in my opinion!)... But if you still want a floppy drive, why not buy an XF551 with 360k 5,25" drive or turn the XF into a 720k 3,5" drive...?!?

 

-Andreas Koch.

 

 

because I'm a masochist :) there is just something about the sound of floppy drives that I like on an older machine. I have an indus GT (that i am designing a SRAM 'ramcharger' PCB for and will do a run of the PCB's when I finish it. several 1050's with various DD mods in them (and stock) an XF 551 and I'm working on a XF551 compatible controller, although if I could get the rom/source and schematic of the XF-Speedy I'd dump the 8040 chip and use a 6502 on the board. what little I was able to find on the XF-speedy indicates it was an add on board that plugged into the 8040 socket that had a 6502 and ram on it, and a replacement rom that plugged into the rom socket (or the rom was on the board with 6502) it wasn't clear.

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More info: http://atariwiki.strotmann.de/xwiki/bin/view/Code/HDISource

 

 

About the hardware set-up, a quote from a Klaus Peters "Speedy-XF" review:

 

"

The kit consists of two printed boards, which are quite big, and

a small switch. The printed boards replaces the CPU of the

disk-drive. Because the CPU is soldered into the board of the

drive, you have to solder it out and replace it with a socket.

After that you also have to remove the ROM of the XF-551 drive

and a small wire, which was not included, must be connected to

one of the pins of the I/O socket. Last but not least, the small

switch must be glued into the drive-mechanism.

"

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More info: http://atariwiki.strotmann.de/xwiki/bin/view/Code/HDISource

 

 

About the hardware set-up, a quote from a Klaus Peters "Speedy-XF" review:

 

"

The kit consists of two printed boards, which are quite big, and

a small switch. The printed boards replaces the CPU of the

disk-drive. Because the CPU is soldered into the board of the

drive, you have to solder it out and replace it with a socket.

After that you also have to remove the ROM of the XF-551 drive

and a small wire, which was not included, must be connected to

one of the pins of the I/O socket. Last but not least, the small

switch must be glued into the drive-mechanism.

"

 

 

thank you, I'd heard 3 or 4th hand about it.

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These were unfortunately made with a version of a 6520 (IIRC) that had to be overclocked -- doubled, I believe. This chip was impossible to find (at least in the U.S.) 15 or so years ago. The closest you can probably come is to find a Black Box and Floppy Board. Although the FB is rock-solid in DD (720K) both mine are a little flaky using 1.44 HD disks. I would say that I typically lost access to 1-2% of the files over a year or so. Probably no worse than using 1.44's with a Win machine, but if you lose the wrong file...

-Larry

 

 

anyone know of a source for the fabled HDI disk interface?

 

*Edit alert! :sad: (sigh, lysdexia strikes again) should have been HDI not HID.

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Hello guys

 

The problem was the 6532 IIRC, you need the 4MHz version, which is hard to find. The PIA in the BlackBox is a 1MHz version.

 

greetings

 

Mathy

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The problem was the 6532 IIRC, you need the 4MHz version, which is hard to find. The PIA in the BlackBox is a 1MHz version.

You remember correctly, it was the 6532 and the HDI needed a 4MHz type. According to Erhard Pütz the problem was that the 4MHz 6532 was announced but never released, but Erhard discovered that a few batches of the 2MHz 6532 also worked fine at 4MHz.

 

The 6532 in my HDI died and Erhard replaced it with another one - but this later one didn't work 100% reliable :-( I started to do some experiments and discovered that it worked better if I increased the power supply voltage to 5.1-5.2V. But I still got some occasional errors - very few, maybe one or two a day, but still too many to use the HDI as my primary storage device - so it's sitting unused on my desk for some 15 years by now...

 

so long,

 

Hias

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