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dada
August 9th, 2017, 08:36 AM
Hi everybody. I've got an old IBM PC clone (http://i.imgur.com/kd93hVs.jpg) here with two floppy drives and no hard drive. (Anybody from the Netherlands will instantly recognize that logo.)

This is actually exactly the same model that I used as a kid, except that one also had a hard drive. I'm therefore looking for a way to get a new hard drive for it. I think these models originally contained Miniscribe drives (http://www.ebay.nl/itm/8425-MINISCRIBE-CORPORATION-8425-USED-31-2-INCH-DISK-DRIVES-/272203729656?hash=item3f609b4af8:g:mCMAAOSwz2lXBmL F) but they are ridiculously expensive online and probably very unreliable.

Someone on another forum mentioned to me that I might want to get an XT-IDE variant, which would allow me to connect Flash storage through IDE, which sounds to me like a perfect solution. I was able to find some information here (https://www.lo-tech.co.uk/product/8-bit-ide-adapter-pcb/) but they seem to be out of stock. Would anyone here happen to know something similar that I could check out? Thanks!

KenEG
August 9th, 2017, 12:45 PM
If you type in XT-IDE in eBay search, there are options to buy the bare board, a kit, or fully assembled. I have one in my XT turbo machine with a 1 gb disk on module attached. More storage than you are eer likely to need on that machine. It will accept larger DOMs if you want.

Stone
August 9th, 2017, 01:18 PM
More storage than you are eer likely to need on that machine. It will accept larger DOMs if you want.Hehehehee... Why would you want something larger than something else that is already 10 times more than you could ever use? :-) :-) :-)

Chuck(G)
August 9th, 2017, 01:33 PM
10-20 MB was about average for the 8088 XT clones.

Caluser2000
August 9th, 2017, 01:49 PM
Hehehehee... Why would you want something larger than something else that is already 10 times more than you could ever use? :-) :-) :-) And the other question is why not? It'll be useful for archiving stuff.

Stone
August 9th, 2017, 03:33 PM
And the other question is why not? It'll be useful for archiving stuff.Whata' lame response!

Do you have 10 GB of PC/XT programs/material?

Do you know anyone that does?

Can you even name/list 10 GB of PC/XT material?

SomeGuy
August 9th, 2017, 05:27 PM
Can you even name/list 10 GB of PC/XT material?
10GB of XDC Player CGA porn. :evilgrin5:

lyonadmiral
August 9th, 2017, 05:41 PM
10GB of XDC Player CGA porn. :evilgrin5:

I'll buy that for a dollar...

glitch
August 9th, 2017, 05:55 PM
Several of the XT-IDE options on eBay are my rev 3 boards -- I'm the one selling blue boards, the parts kit, and the blue assembled XT-IDEs. You're of course free to buy off eBay, but it's cheaper if you PM me and buy direct (eBay fees are around 11% of the eBay prices).

I'd avoid the white/green "OPTIMA" boards, they're based off of my rev 3 board, which is of course fine -- it's open source, but the guy making them doesn't seem to really know what he's doing. For example, he decided he didn't need any of the bypass capacitors.

This is the project page for the XT-IDE rev 3:

http://www.glitchwrks.com/2016/07/06/xt-ide-rev3

I can also provide industrial Flash modules which will work directly with the XT-IDE rev 3 -- no power cable required. I have 64 MB, 128 MB, and 8 GB modules. Personally, I like the 64 MB and 128 MB modules for XT use -- they're closer to the actual hard drives you might've had in such a system, and they don't take forever for the first DOS DIR!

Stone
August 9th, 2017, 06:43 PM
... and they don't take forever for the first DOS DIR!Just off the top of your head... about how long would that take with the ~10 GB drive someone jokingly (I hope) suggested earlier? :-)

Xacalite
August 9th, 2017, 07:11 PM
Just off the top of your head... about how long would that take with the ~10 GB drive someone jokingly (I hope) suggested earlier? :-)
Last time I checked all DOS versions with support for INT 13h extensions and FAT32 required 386+
So, on an 8088 you can't have more than 8 GB divided into four 2 GB partitions.

Trixter
August 9th, 2017, 07:30 PM
Do you have 10 GB of PC/XT programs/material?

Do you know anyone that does?

Can you even name/list 10 GB of PC/XT material?

Yes, yes, and yes. Disclaimer: I'm an archivist.


I'll buy that for a dollar...

And you'd be overpaying! :-)


Just off the top of your head... about how long would that take with the ~10 GB drive someone jokingly (I hope) suggested earlier? :-)

The time a DIR takes on a slow computer is proportional to the number of clusters in the filesystem, so a 2GB DIR takes the same time as a 1GB DIR, a 512MB DIR, a 256MB DIR, etc. as they all use the maximum 65517 clusters per filesystem. Takes about 17 seconds @ 4.77 MHz and ~50 seconds on a PCjr.


So, on an 8088 you can't have more than 8 GB divided into four 2 GB partitions.

Correct. The only way to exceed this is to use the network redirector to point to a network drive, or to use something like EtherDFS (http://etherdfs.sourceforge.net/) which would let you put a 2G partition at drives C through Z for a total of 48 GB.

Stone
August 10th, 2017, 02:47 AM
http://www.vcfed.org/forum/images/misc/quote_icon.png Originally Posted by Stone http://www.vcfed.org/forum/images/buttons/viewpost-right.png (http://www.vcfed.org/forum/showthread.php?p=471970#post471970)
Do you have 10 GB of PC/XT programs/material?


Yes. Disclaimer: I'm an archivist.Now the relevant question...

Is all that material stored on a single PC or XT?

Trixter
August 10th, 2017, 07:48 AM
Is all that material stored on a single PC or XT?

Actually, yes. And since I shouldn't be the only person in the world with this capability, I'm working on a system that allows anyone to easily load up vintage DOS systems with gigs of software/games. The current workflow is 1. Point a script to a source dir of archives and it copies them to dos-friendly filenames in a destination dir, 2. The user copies those dos-friendly files over to their vintage system, and 3. A launcher/menu with search capabilities is included with the copied files so that you can easily search and launch what you copied over.

I've had this working since February but want to add more features and make it foolproof before releasing it, which should happen in October.

This is off-topic, so to get things back on-topic: To the OP: Get an XT-IDE variant and use it with a 2G compact flash card, which should serve your needs very well. Format the compact flash in your vintage system as a single 2G primary partition, and you will be able to read/write the card in a modern system with a USB card reader. I've done this for over a decade and it's been very helpful when I want to move more than 10% of the drive around.

RuudB
August 11th, 2017, 02:56 AM
Hallo Dada,

If interested at all, I have several hardcards lieing around, like this one: https://en.wikipedia.org/wiki/Hardcard#/media/File:Plus_Hardcard_20_with_plexiglass_cover.JPG
I live in Heerlen.

KC9UDX
August 11th, 2017, 03:18 AM
Is that a Plus 20? That acrylic cover sure would be handy.

dada
August 14th, 2017, 06:42 AM
Wow, thanks for all your helpful replies! I have to confess, I don't visit this forum normally so I kind of forgot I had this topic here until now. :(

Think I'll send you a PM, @glitch. The hardcard option sounds interesting too, but I think maybe the XT-IDE is the most reliable solution long term.