Here you can download the original PCMIDI utilities and manual as well as the newer version quick setup guide.
Keep in mind no drivers are needed for DOS.
Windows 3.x , 9x and ME include the "Roland MPU-401" driver which works perfectly with PCMIDI.
|Original PCMIDI manual|
|Original PCMIDI utilities disk image and files (for historical reasons)|
|New PCMIDI Quick Setup Guide (all you really need!)|
| Windows 9x/ME MPU-401 MultiPort drivers
(gets rid of annoying "this device is used by another application" message)
|All of the above files in a single package|