8 Jan
2021
8 Jan
'21
5:16 p.m.
True, however SIMH has to write things to a "real" file that emulates
something of a disk. In this case I'm guessing it writes more as a super
powered RQDX2 in that the first cylinders do not have the disk
parameters and other odd stuff.
Which makes sense as the RQDX1 and 2 are simpler devices than the 3.
But as Dave pointed out, the last track on the disk is probably the bad
block revector table. So no clue as to how the disk remaps bad blocks,
but I don't think any of them were bad.
I'll put the image up on iguana tonight. If it's a blank system then
someone can fiddle around with it a bit.
CZ
On 1/8/2021 2:57 PM, Eric Smith wrote:
On Thu, Jan 7, 2021 at 7:38 PM Chris Zach via cctalk
<cctalk at classiccmp.org <mailto:cctalk at classiccmp.org>> wrote:
Oddly enough SIMH seems to read a raw RQDX1/2 disk pretty well.
That's good to know, but not really all that odd. Arguably the main
purpose of MSCP was to abstract away drive and controller differences.