Installing 3.5" drive in a TRS-80 Model 4P

[Chuck Guzis]

On 4/3/2006 at 9:55 PM Steve Phipps wrote:

>I've got an old Teac 3.5" drive (in 5.25" mount) with jumpers set as Drive
>1 that I want to install in my TRS-80 Model 4P. Tried to tackle installing
>it today, but was unsuccessful. Supposedly the TRS-80 Model 1, 3, and 4
>machines will read / write to older 3.5" drives with jumpered drive
>select. The 4P's drive cable is card edge only, so tried using a PC drive
>cable hooking up the original 5.25 drive and 3.5 drive using both the
>cable's end and middle jacks. The 4P wouldn't recognize either drive in
>any position.

Tim mann, has a nice Q&A on this subject:

http://tim-mann.org/trs80faq.html#[19]

In general, you'll want to set the first drive select as DS0 and the second
as DS1; straight (untwisted) cable on both drives--not a PC cable.

Cheers,
Chuck