PDP11/23+ goes on

[Paul Koning]

>>>>> "Allison" == Allison  <ajp166 at bellatlantic.net> writes:

 Allison> The problem with QBUS PDP-11 IDE is that I've not seen a
 Allison> design that has a DMA implementation which make it slow.
 Allison> Also drivers for common PDP-11 OSs other than unix are roll
 Allison> your own, wich is possible IF you already have a working
 Allison> system (with editors and asm).

Or worse...  Adding any device driver to RSTS, never mind a disk
driver, requires a full source kit and a bunch of undocumented
procedures.  That OS never supported customer-supplied device
drivers. 

RT and RSX are certainly more accommodating in that respect.

   paul