[comp.os.os9] TC-70 vs MM/1

blarson@blars (01/28/91)

In article <2535@batman.moravian.EDU> halkoD@batman.moravian.EDU (David Halko) writes:
>The TC-70 comes with more memory than the MM/1 (from what I last remember...)
>
>Because of the extra memory, the TC-70 is slightly faster than a stock MM/1.

Extra memory does not, in general, speed up an osk system.  (Ghost
modules are kicked out if memory is tight, and putting more stuff on
ram-disk can speed a system, but if your system has enough memory,
adding more will not speed it up.)

>The TC-70 will act as a direct mother board replacement for owners of
>QT systems,

Only K-Bus systems.  My QT+ and QT20x are not K-bus based.

>FHL has been around for quite a few years (over a decade) and delivers 
>excellent support! He has delivered me nothing but the greatest support 
>over the past couple of years with technical assistance for the 
>equipment that I had purchased from him. 

Frank is a nice guy, but don't make any purchases based on "this will
be available".  (His plans quite often don't become reality.) If you
want info on os releases, new boards, etc. in a timly fassion, you
have to call him and ask.  The extra software he supplies is porly
documented, and at least one program he gave me had a real nasty bug.
(mv will quite happliy put multiple files in a directory with the same
name.)  Make buying desisions based on what is shipping, not his
expected timetable for future offerings.  (Not bad advice about any
vendor.)


-- 
blarson@usc.edu
		C news and rn for os9/68k!
-- 
Bob Larson (blars)	blarson@usc.edu			usc!blarson
	Hiding differences does not make them go away.
	Accepting differences makes them unimportant.

halkoD@batman.moravian.EDU (David Halko) (02/15/91)

In article <172@blars>, blarson@blars writes:
>> halkoD@batman.moravian.EDU (David Halko) writes:
> >The TC-70 comes with more memory than the MM/1 (from what I last remember...)
> >
> >Because of the extra memory, the TC-70 is slightly faster than a stock MM/1.
> 
> Extra memory does not, in general, speed up an osk system.  (Ghost
> modules are kicked out if memory is tight, and putting more stuff on
> ram-disk can speed a system, but if your system has enough memory,
> adding more will not speed it up.)

The slowdown I am speaking of occurs when 68070 and VSC's working memory
overlaps, taking up the same address space. That little bit of extra memory 
(from what I understand) is allocated outside of the VSC space, since the
VSC only addresses 1 Meg, thus is accessable faster to the 68070, speeding
the machine up... as long as the total ammount of memory is over 1 Meg in 
any VSC/68K combination, memory access outside of the initial video 1Meg will
be faster than outside the 1Meg... I remember a few people saying that this
is the case with many graphical based computer systems (including the Amiga.)
 
> >The TC-70 will act as a direct mother board replacement for owners of
> >QT systems,
> 
> Only K-Bus systems.  My QT+ and QT20x are not K-bus based.

From what the literature read, the TC70 card was supposed to fit into the same
case & mounting holes of the previous QT's... I could be wrong, but I distinctly
read this. Literature is sometimes wrong, sometimes there are misprints. But
then again, would you feel that the graphics would be that big of a difference
in your case, to drop a 68020 CPU for a 68000 based CPU?
 
> >FHL has been around for quite a few years (over a decade) and delivers 
> >excellent support! He has delivered me nothing but the greatest support 
> >over the past couple of years with technical assistance for the 
> >equipment that I had purchased from him. 
 
> Frank is a nice guy, but don't make any purchases based on "this will
> be available".  (His plans quite often don't become reality.) If you
> want info on os releases, new boards, etc. in a timly fassion, you
> have to call him and ask.  The extra software he supplies is porly
> documented, and at least one program he gave me had a real nasty bug.

His documentation quite often needs help... that is a definite fact from past
experiences! As an experienced user, I really have no problems, but a starting
user may be inclined to be a little confused about things! (One friend...
well, that is another story...) 
 
> 
> -- 
> 		C news and rn for os9/68k!
> -- 
> Bob Larson (blars)	blarson@usc.edu			usc!blarson
> 	Hiding differences does not make them go away.
> 	Accepting differences makes them unimportant.