Date: Fri, 9 Feb 2001 22:12:50 -0700
From: "Richard Erlacher"
<edick(a)idcomm.com>
Subject: Re: Holy Crap! IMSAI's weren't this expensive when new!
Well, hopefully he recognizes what a DOG this system is, with its NorthStar
controller.
There you go, needlessly trashing N*'s again! You must have been bitten by
a hard-sectored disk when you were small. NorthStar responded when
hobbyists who couldn't afford 8" drives wanted a disk drive for their
Imsai's and Altairs. They were VERY popular and well supported. Their
boards and systems were well done and reliable. They even provided a
hardware floating point board for number crunchers long before other
vendors. NorthStar's own DOS and BASIC were probably initially brought up
on more Altairs and Imsai's than CP/M was as a first OS. It was a very
usable BASIC with BCD arithmetic and cleaner random access file handling
than Microsoft BASIC ever had. Sure, CP/M became THE OS of the day, but N*
DOS was there first. The Horizon supported CP/M 1.4 and later 2.2 was
distributed by NorthStar. And take a look at Walnut Creek's CP/M CD-ROM -
just figure out the percentage of the CD-ROM that concerns itself with
NorthStar, CP/M or otherwise, and compare it with the support for other
computers which supported an OS other than CP/M.
It will never have a decent-sized TPA thanks to the
memory-mapped controller,
Pure nonsense! Even without moving the boot-prom, (an option supported by
NorthStar or a simple mod for users of the day which would give you a 62k
CP/M system), NorthStar's and Lifeboat's and SAIL Systems's CP/M would give
you a 56k or 58k system with the standard boot ROM. I NEVER found a CP/M
program I couldn't run in 56k, and I ran ALL the popular CP/M programs -
dBASE, WordStar, BDS C, SuperCalc, FORTRAN, various Pascals (including N*'s
own version of UCSD Pascal, though not under CP/M), SpellGuard, etc.
and it will never read soft sectored diskettes
either. Fortunately, he can probably afford to put up
with the associated
problems.
Never had any problems - just perceived that way by folks too rigid to take
other than the soft-sectored path! And NorthStar was popular enough that
when George Morrow designed his DJ-DMA controller, he supplied a BIOS for it
that could read and write both N*'s hard-sectored format as well as other
soft-sector formats. That was the main reason I got a Morrow Decision I.
It wasn't until late in the CP/M game that utilities began to appear for
reading other manufacturer's formats. I added a Morrow Disk Jockey 2 board
to add my 8" drives to my Horizon in order to transfer the standard SSSD 8"
CP/M formatted disks - the ONLY standard for CP/M. Even soft-sectored 5"
formats were specific to their manufacturer.
I advised Tom Bassi to dump the NorthStar stuff any way he could, and,
since
he had several IMSAI's at the time, this was how he
chose to do it. I'm
really glad he did so well.
I am glad he did well, too, despite your advice. (hi, Tom!)
You can see from the pictures that he does
clean work and keeps things looking good.
Dick
Bob Stek
Saver of Lost Sols