24 Oct
2018
24 Oct
'18
5:23 p.m.
From: Jacob Ritorto <jacob.ritorto(a)gmail.com>
System III only supports rl01, not rl02
Really? That seems odd; SysII long post-dates (I think) the RL0x, if so it's
odd they only supported the RL01. Looking at:
https://minnie.tuhs.org//cgi-bin/utree.pl?file=SysIII/usr/src/uts/pdp11/io/…
it seems to support RL02's:
#define RL02 0200 /* bit 7 indicates an rl02 present if set */
Would anyone know if it's trivial to modify the
source for the rl01
driver to just add double the blocks
The only difference between the two is that the RL02 has twice as many
cylinders, so there's an extra bit in use on the high end of the 'disk
address' register.
From: Clem cole <clemc(a)ccc.com>
Also if you have a 40 class system like the 34 of 34A
see if you can
find an Able Enable board.
I'm sure there are a stack of them stored away with Jimmy Hoffa's body and the
Ark of the Covenant in King Solomon's Mine! :-)
Seriously, if anyone has one, I'd pay a very substantial sum for it.
Noel