[comp.sys.tandy] Tandy 6000 RAM Swap driver

mbeast@tls.UUCP (Michael East) (01/30/89)

I have two questions regarding the Subject:

	1. Does anybody know a valid address for (from uunet):

From attcan!uunet!convex!killer!texbell!merch!cpe!hal6000!trsvax!trsvax.tandy.COM!uhclem Tue Nov 22 01:35:09 1988
From: uunet!convex!killer!trsvax!uhclem  (Frank Durda IV)
					Frank Durda IV @ <trsvax!uhclem>
				...decvax!microsoft!trsvax!uhclem
				...sys1!hal6000!trsvax!uhclem

	   Simply reversing the 'From' address doesn't seem to work.
	   (Better still - "Frank, you there?")

	2. Does anybody have a public domain version of a RAM Swap
	driver which will use >1Meg RAM? I have 9Meg of RAM boards
	wired into my 6000 and would like to use them somehow. I DO
	know about the new MMU driver from Tandy but (what else ;-)
	the $$ don't justify it for my home system (yet!).

	I am running XENIX 3.2 if it makes a difference.

Thanks in advance!

----- uunet!attcan!utzoo!tls!mbeast	#include <std.disclaimer>
Michael B. East				Senior Technical Analyst
Jonas & Erickson Software, Toronto

uhclem@trsvax.UUCP (02/02/89)

<>
B>	   Simply reversing the 'From' address doesn't seem to work.
B>	   (Better still - "Frank, you there?")
Yes, I have responded via private mail.

B>	2. Does anybody have a public domain version of a RAM Swap
B>	driver which will use >1Meg RAM? I have 9Meg of RAM boards
B>	wired into my 6000 and would like to use them somehow. I DO
To save the network excess gas, I will respond briefly here.  You can't
put 9 meg in due to the memory address space being restricted to 7 Meg (plus
perhaps 512K).  This is not a 68k restriction.  It is a design restriction
of the Model 16/6000 which divided the 16Meg into two address zones.  One
bypasses the offset and limit registers (USER) and the other doesn't (SYSTEM).
Take away another portion of a Meg for the memory-mapped I/O space and you are
at 7 Meg.  Besides the provided power supply should be smoking by now, unless
perhaps you are using someone else's box.

<This information is provided by an individual and is not nor should be
 construed  as  being  provided  by  Radio  Shack or Tandy Corp.  Radio
 Shack/Tandy Corp has no obligation to support the information provided
 in  any way.  And they won't.  But if you wrote a MS-DOS emulator, you
 might get their attention.>
						
					"Thank you, Uh Clem."
					Frank Durda IV @ <trsvax!uhclem>
				...decvax!microsoft!trsvax!uhclem
				...sys1!hal6000!trsvax!uhclem