Franklin Computer Disk Interface Card

16 posts / 0 new
Last post
Offline
Last seen: 5 hours 5 min ago
Joined: Aug 4 2015 - 14:30
Posts: 129
Franklin Computer Disk Interface Card

I got this disk interface card together with an apple IIe some years ago.

There was no documentation with it, although I don't think I need one.

The card was not working, but I found that the 74LS373 was faulty, and after replacing it, the card works.

 

Notice the jumper pins just to the left of the blue connector?

I am guessing this means that the card can handle 13 sector disks and 16 sector disks.

Without a jumper the card displays the screen below when booting (or when using PR#6). See photo 3.

How awesome is that?

 

With a jumper on the 16 pins it boots fine from a DOS 3.3 disk or ProDos.

I have not tried the jumper on the 13 pins, because I do not have a 13 sector disk.

 

Now my questions are:

1. Does a 13 sector disk require a different disk drive, or can I use the disk drive which I normally use for 16 sector disks?

2. Is there a way to create a 13 sector boot disk, perhaps by downloading a DSK file and using ADTPro in some way?

 

Photo 1 - Franklin Computer Disk Interface Card topside

 

Photo 2 - Franklin Computer Disk Interface Card backside

 

Photo 3 -Franklin Computer Disk Interface Card bootscreen without jumper

 

Offline
Last seen: 1 week 4 days ago
Joined: Dec 19 2008 - 21:01
Posts: 345
There is a special version of

There is a special version of ADTPro that will write 13-sector disks called "ADT13"

 

Offline
Last seen: 1 week 4 days ago
Joined: Dec 19 2008 - 21:01
Posts: 345
There is a special version of

...

 

Online
Last seen: 33 min 5 sec ago
Joined: Jul 5 2018 - 09:44
Posts: 951
A normal Disk ][ or

A normal Disk ][ or compatible drive will handle 13 sector disks just fine.  It is the controller, specifically the state machine part of the ROM that is what matters.  Well, the boot code does a little too.

 

Offline
Last seen: 13 hours 50 min ago
Joined: Jun 25 2020 - 17:00
Posts: 73
3.2 disk image

Here's a 3.2 disk image of Binary Data00AppleInvadersDOS3.2-1979.img.

Macintosh_nik's picture
Offline
Last seen: 3 hours 24 min ago
Joined: Jan 8 2021 - 05:18
Posts: 181
Hi guys!
I also have such a card.
Offline
Last seen: 5 hours 5 min ago
Joined: Aug 4 2015 - 14:30
Posts: 129
Macintosh_nik wrote:I also
Macintosh_nik wrote:

I also have such a card.

 

 

Looks almost identical. Same components and same placement, but the pcb is different.

 

Online
Last seen: 33 min 5 sec ago
Joined: Jul 5 2018 - 09:44
Posts: 951
That looks like a Taiwan/Hong

That looks like a Taiwan/Hong Kong clone of the Franklin card.

 

Offline
Last seen: 13 hours 49 sec ago
Joined: Nov 29 2020 - 19:48
Posts: 62
Taiwan Franklin clone
softwarejanitor wrote:

That looks like a Taiwan/Hong Kong clone of the Franklin card.

I agree.  My Redstone clone has a different disk controller card, similar to but not quite Disk ][ controller , but it has the same interesting, unique font for DRV1 DRV2 designation. My guess is the same cloner mimiced lots of stuff .

 

 

 

Online
Last seen: 33 min 5 sec ago
Joined: Jul 5 2018 - 09:44
Posts: 951
8BitHeaven wrote
8BitHeaven wrote:
softwarejanitor wrote:

That looks like a Taiwan/Hong Kong clone of the Franklin card.

I agree.  My Redstone clone has a different disk controller card, similar to but not quite Disk ][ controller , but it has the same interesting, unique font for DRV1 DRV2 designation. My guess is the same cloner mimiced lots of stuff .

 

&nbs

I would concur.  There were several companies in Tiawan and Hong Kong back in those days that turned out clones of a lot of stuff and it was sold under all kinds of brand names througought the world.  Sometimes no name at all, just plain boxes.  There were small computer shops and stometimes regional chains that sold this stuff, but a lot of it was sold through ads in magainzes like Computer Shopper and the various Apple orriented mags, etc.

 

 

NovellNetware's picture
Offline
Last seen: 6 days 16 hours ago
Joined: Jun 3 2019 - 21:23
Posts: 90
Ditto on the card.

I got one of those cards. I was happy to see jumpers until I looked up a manual. Found out it was for the 13 sect / can't remember 16 sect. ? disks?

 

 

TTFN,

 

Josh

Offline
Last seen: 5 hours 5 min ago
Joined: Aug 4 2015 - 14:30
Posts: 129
NovellNetware wrote:I got one
NovellNetware wrote:

I got one of those cards. I was happy to see jumpers until I looked up a manual. Found out it was for the 13 sect / can't remember 16 sect. ? disks?

 

Jumper on the 13 pins is for 13 sector disks. Jumper on the 16 pins is for 16 sector disks.

 

Do you have a manual for the card?

I have not been able to find a manual, so can you provide a link to a manual?

Online
Last seen: 33 min 5 sec ago
Joined: Jul 5 2018 - 09:44
Posts: 951
The Franklin manuals are

The Franklin manuals are about as close as I can find...

 

http://vtda.org/docs/computing/Franklin/

 

https://osiweb.org/other/franklin-ace1000.pdf

 

The Ace 1000 manual includes some info on the disk controller, but not a lot.

 

Offline
Last seen: 5 hours 5 min ago
Joined: Aug 4 2015 - 14:30
Posts: 129
Thank you

none of the manuals really apply to my card.

But thanks anyway.

Online
Last seen: 33 min 5 sec ago
Joined: Jul 5 2018 - 09:44
Posts: 951
I don't know if they really

I don't know if they really gave much of a manual with that card.  Franklin cards usually came bundled with an Ace 1000, and the clone cards usually came with a single sheet in pidgeon Engrish that at most would probably have explained the 13/16 jumper and how to plug in the floppy drive cables.

 

What about it are you looking to find out?

 

Offline
Last seen: 5 hours 5 min ago
Joined: Aug 4 2015 - 14:30
Posts: 129
There is

probably nothing that I haven't figured out already.

But you never know if there is some gem of information in a manual.

Log in or register to post comments