ISA CF interface...

ISA CF interface...

Post by gene » Sun, 17 Aug 2008 02:12:28


Has anyone developed a CF card interface that is on an 8 bit ISA
card? I've got an XT with a standard MFM drive in it and I'd like
to either go to CF or IDE to avoid the eventual death of that drive.

tnx.

g.
 
 
 

ISA CF interface...

Post by Marten Kem » Sun, 17 Aug 2008 08:56:15


My limited experience (2 cards) with 8-bit IDE controllers
is that they're limited to a single 32mb drive - I think
that there's a 16-bit register that overflows when presented
with more than that. I wasn't able to get either of mine running
'cause I don't have any small drives (my inventory lied).

I'd suggest looking into 8-bit SCSI controllers - I was having
some luck with the Future Domain TMC850 family when my XTs
decided to quit working. I *think* that any limitations would
be in the OS: 32mb for early DOS, 2.1g for later DOS. What OS
are you using?

--
-- Marten Kemp
(Fix name and ISP to reply)

 
 
 

ISA CF interface...

Post by gene » Sun, 17 Aug 2008 15:10:41


Aren't the only SCSI controllers available only suitable for use with
the old 50 pin IDC connector type drives? I've never seen any of the 68
pin drives connected to an 8 bit card.

I'm currently running DOS 3.30 on the machine. It's got 640k on board.

tnx.

g.
 
 
 

ISA CF interface...

Post by Barry Ruc » Sun, 17 Aug 2008 19:14:10


drive.
with
the

There are people selling adapters. I've used them though not with an 8
bit card. Can't see why it wouldn't work though with a 3 or 4 Gig
drive.



I think there may be a world market for maybe five computers.

Thomas Watson
Chairman of IBM 1943

Regards,

Barry Ruck. Harlow, Essex. United Kingdom.
 
 
 

ISA CF interface...

Post by Robert E. » Mon, 18 Aug 2008 05:12:20

Hello Gene !

Take a look at this page I whipped up some time ago, it might help a little
bit:

http://www.yqcomputer.com/

'course, now the hard part. You have to find one of these cards. Rarely see
them on eBay. Stay away from the Juko cards. They should have spelled them
Junk.

bobwatts
 
 
 

ISA CF interface...

Post by Wesle » Mon, 18 Aug 2008 10:33:55

The problem is that things are a bit confusing. There are IDE controllers
that work in 8-bit slots and 16-bit slots (nevermind the PCI, VLB, etc).
Then there is 8-bit IDE and 16-bit IDE. Two totally different things. Most
all 8-bit IDE ISA slot controllers are 8-bit IDE. Those won't work with a
compactflash card in an adapter. What you need is an 8-bit ISA IDE card
that will control a 16-bit IDE drive. That's a rare bird...but it will
(should?) work.

Wesley
 
 
 

ISA CF interface...

Post by Barry Ruc » Mon, 18 Aug 2008 18:02:16

Once Upon A Time ( 17/08/08 actually ) Wesley scribbled :





I was referring to 50 pin SCSI to 68 pin SCSI adapters. As I said, I've
used these with a 16 bit card and they work fine. I see no reason why
they should not work with an 8 bit card.

Barry

--


Reality is what you bump into in the dark. - Raymond E. Feist

Barry Ruck - Harlow, Essex. UK.
 
 
 

ISA CF interface...

Post by Wesle » Mon, 18 Aug 2008 22:51:19

Ah, ok...sorry for the confusion. Yeah, that shouldn't be a problem. As I
understand it (this was true at some point, but may not be now) - SCSI is
SCSI is SCSI. You can adapt any version of SCSI controller to any version
of SCSI device. Of course it will fall to the lowest common denominator as
far as speed goes...

The only problem might be finding an 8-bit SCSI card that will support a
large drive... I did see somewhere relatively recently where someone had
gotten a 1 or 2Gb SCSI drive to work in an XT-class machine...

Wesley
 
 
 

ISA CF interface...

Post by gene » Tue, 19 Aug 2008 03:07:52


Neat setup Bob. The machine I have is actually a true 5150 XT. I found it
at a local recycler. The cool thing about it was the whole system was
there in the original boxes with original packing material. I booted
the machine up and while the floppy drive had gone south, the 10MB drive
was fine. The file dates on the machine show it last was booted in 1986
with the earliest file dates only a few months earlier than the latest.

The package consisted of the CGA color display, the 5150, the 5152 printer
and the IBM serial and IBM parallel cables in their original boxes!

I'm seriously considering putting a BBS up on the machine just for the
hell of it, but I would rather not stress that 22 year old 10MB hard disk
any more than I have to.

Is eBay the only place to find those AccuLogic IDE cards?

tnx!

g.
 
 
 

ISA CF interface...

Post by bobwatt » Tue, 19 Aug 2008 04:53:46

Hi Gene !

(inserting comments as I go.... )




I think you mean 5160, don't you ?

The IBM 5150 was the original IBM PC, with one or two floppy drives
and no
HDD.

The 5160 was an XT, the 5162 was an "XT" with a 286 CPU, and the 5170
was
an AT machine with 286.


I found it


Yes, that is COMPLETELY cool. :-)

I am a professional "computer spelunker", and like doing stuff like
that. In
the last week, I have hauled home a car and a half load of "stuff" to
tinker
with.



Dunno, but the most likely place to start is there. I actually bought
mine
brand new from a store many years ago. Haven't seen another in years,
and
frankly don't expect to. But you never know.....

Keep us posted.

bobwatts


boBWatts
EartH
Watts Carburetion Service
Whizzbang Computers
Official collector of: transfat asian plastic junk trinkets !
 
 
 

ISA CF interface...

Post by gene » Tue, 19 Aug 2008 13:58:47


Yes. I thought of that after I posted the message. :)

I'd love to be able to do that, but I doubt I could get it past SWMBO. :)

I should spend some time at the card bin at the place I found the machine.
There's a ton of 8 bit cards in there that I haven't paid much attention
to.

g.
 
 
 

ISA CF interface...

Post by Jim Leonar » Tue, 19 Aug 2008 23:47:11


Where are you located? A store with a bin of 8-bit ISA cards sounds
like heaven to some of us :-) and I'd like to check it out.
 
 
 

ISA CF interface...

Post by Robert E. » Wed, 20 Aug 2008 01:13:22


YES ! Would love to see it !

bob
 
 
 

ISA CF interface...

Post by Marten Kem » Wed, 20 Aug 2008 08:06:16


Me, too. I have a little list of old stuph I'd like to acquire...

--
-- Marten Kemp
(Fix name and ISP to reply)
 
 
 

ISA CF interface...

Post by Ruud » Wed, 20 Aug 2008 19:46:56

Hallo Marten,



Then publish it here. I have some cards laying around, some over
twenty years old. Not much, but at least worth a try.