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