Spot the Mod (disk controller)

[aftyde]

Hi All,

 

I have two TI controllers... One has the John Guion ROM's with some traces added to the board and a single wire connected to the external bus. This allows access to four double-sided single-density (DSSD) drives and the use of "dskn" in lower case. The other is a mystery. I have de-shelled it and posted a picture. Two ROM's with wires headed out to a switch. Anyone know what this mod is supposed to do?

 

 

Cheers, Arthur...

[aftyde]

Looks like I figured it out... 80 track upgrade...

 

http://www.mainbyte.com/ti99/upgrade/upgrade.html

[Shift838]

Looks like I figured it out... 80 track upgrade...

 

http://www.mainbyte.com/ti99/upgrade/upgrade.html

 

yup looks like one of the original 80 track upgrades for the TI FDC.

 

The newer 80 track upgrade is just a 2 chips to pop in. No jumping ore resistors..

[+Ksarul]

Didn't one of those original 80-track mods also let you use 8" floppies?

[Shift838]

Didn't one of those original 80-track mods also let you use 8" floppies?

 

I believe it did, but not completely sure.

[+Schmitzi]

uih, not bad. I have some pics from a 8"-Shugart-drive, so I just post them...

 

If I remember correct, this drives were running with 110/220 Volts full throttle-power

 

 

 

 

[budz2355]

Oh man that would be awesome! Does anyone have the ability to test the 8" mod? I would totally buy a drive if I could find one for $200 or less working (...and knew that I could connect it to my TI)

[budz2355]

uih, not bad. I have some pics from a 8"-Shugart-drive, so I just post them...

 

If I remember correct, this drives were running with 110/220 Volts full throttle-power

 

 

Shugart-851-8in-Floppy-01.JPG Shugart-851-8in-Floppy-03.JPG

 

 

Shugart-851-8in-Floppy-10.JPG

Any enclosures available for these drives? Do I need a nuclear generate to run this beast or will my PEB power it?

[+Ksarul]

The PEB will definitely NOT power an 8" drive. . .you need to put them in an external enclosure with a power supply suited to 8" drives. They suck a LOT of power compared to a 5.25 drive.

[Stuart]

Some 8" drives need 24V DC and 110V AC mains supplies ...

[+OLD CS1]

Oh man that would be awesome! Does anyone have the ability to test the 8" mod? I would totally buy a drive if I could find one for $200 or less working (...and knew that I could connect it to my TI)

 

I have two 8" drives I have been dying to try out. I have them ear-marked for reading (or trying) my old System/34 disks which contain my libraries from high school.