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alank2
April 25th, 2017, 03:16 PM
Hi Everyone,

So, I am awaiting an original Compaq portable which should arrived on Thursday. It has no video, but I'm hoping I can figure that out / fix that. On the hopeful plan that I will get it running, can someone summarize the XTIDE options that are available now? I don't mind soldering through hole or SMT. Do people usually order a pcb from someone and then build it with parts from digikey/mouser?

System specific questions - does anyone know about how the hard drive support works on the compaq portable? How do you configure the drive, geometries, etc.?

Thanks

Alan

alank2
April 26th, 2017, 02:07 PM
So it looks like Lo-tech has theirs summarized here:

https://www.lo-tech.co.uk/wiki/Lo-tech_XT-CF_Boards

And I saw this too:

http://www.malinov.com/Home/sergeys-projects/xt-cf-lite

Has anyone ordered or had a plastic bracket made for the CF slot ones?

I sort of wish the CF slot ones didn't expose the slot to the outside world - like an internal hard drive would be anyway. Then you could just use a simple metal bracket...

modem7
April 27th, 2017, 01:29 AM
On the hopeful plan that I will get it running, can someone summarize the XTIDE options that are available now?
Great Hierophant started a 'Keeping Track of All the XT-IDE Variants' thread at [here (http://www.vcfed.org/forum/showthread.php?36816-Keeping-Track-of-All-the-XT-IDE-Variants)].


System specific questions - does anyone know about how the hard drive support works on the compaq portable? How do you configure the drive, geometries, etc.?
The Compaq Portable is a clone of the IBM PC (IBM 5150). Therefore, I expect that just like the IBM PC:

- The motherboard BIOS does not 'know' anything about hard drives.

- An XT-class hard disk controller gets used, and the BIOS expansion ROM on that has all of the hard drive 'smarts'. Configure per the controller's manual.

- To support the BIOS expansion ROM on the XT-class hard disk controller, the motherboard BIOS may need to be upgraded. This is supported by the Wikipedia article on the Compaq Portable.

- Consider the hard drive's power draw on the power supply.

alank2
April 27th, 2017, 04:09 AM
Thanks for the XT-IDE variant thread; I've been looking for something like that here and haven't been able to find it!!!

glitch
April 27th, 2017, 11:01 AM
I've got plenty of XT-IDE rev 3 cards, parts ktis, and assembled units:

http://www.glitchwrks.com/xt-ide

The rev 3 boards don't seem to be on the variants thread, I'll add it.

hornbetw
April 27th, 2017, 06:29 PM
I had a white plastic bracket made @ Shapeways. It works fine, but I would prefer a metal bracket for the durability. I wanted a CF card that could be removed without taking the case apart on my Tandy 1000A.

Tom

alank2
April 27th, 2017, 06:40 PM
What did the bracket cost?

alank2
April 28th, 2017, 04:58 AM
glitch - I like where you positioned the IDE port on the XT-IDE rev 3. I can plug a CF-IDE adapter directly onto that, correct? One that looks like this?

http://www.ebay.com/itm/Compact-Flash-CF-to-3-5-Female-40-Pin-IDE-Bootable-Adapter-Converter-Card-/111977195791?hash=item1a125c690f:g:9Z8AAOSw3mpXGwt ~

How much is it for the kit to build it?

Thanks,

Alan

glitch
April 28th, 2017, 05:25 AM
Yes, that particular adapter is very popular, I think I've got three or four myself :) In addition to plugging right on to the XT-IDE, it'll draw power from IDE pin 20, so no external cables are required. If you're not wanting CF for the removable feature, I'd recommend getting an industrial Flash module/DOM -- they're generally better compatibility wise, and have a higher write endurance than consumer CF cards. If you *are* wanting a CF card specifically because it's removable and you can plug it into a modern PC, try and get an industrial model.

The Kit with PC Board is $28 plus shipping. In the US, shipping is $8. I do have DOMs, industrial CF cards, and CF -> IDE adapters, too. PM me if interested, or use the contact form on my site.

I'm working on a CF adapter add-on that will be optionally rear accessible (through the card slot). It should work with any XT-IDE that uses the Keystone metal bracket. Also usable by itself. It won't extend the length of the XT-IDE at all, so it will be usable in XT Slot 8.

hornbetw
April 28th, 2017, 04:34 PM
Under $10 with shipping.

Tom

smbaker
April 28th, 2017, 08:20 PM
Has anyone ordered or had a plastic bracket made for the CF slot ones?

I used a metal bracket and either some tin snips or a nibbling tool (can't remember which; memory is crap these days). It worked out pretty well and it's very durable. Being able to pop out the CF card and carry it over to the windows box for some quick software loading is handy.

38104

alank2
May 4th, 2017, 10:18 AM
Thanks glitch! I have freedom from floppy drives finally!

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