11 Jan
2007
11 Jan
'07
5:04 a.m.
If it runs in 32K words, and uses IRQ's, there should be no problem.
But the BBL code will be swapped out with a little 'stub' program that will
re-swap the system map, either for another overlay, or to run IPL code.
You get a real virtual address space, registers, IRQ's, DCPC transfers, etc.
Why would TSB be any different than single user HP BASIC (which uses IRQ's)?
----- Original Message -----
From: "Jay West" <jwest at classiccmp.org>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Sent: Wednesday, January 10, 2007 10:36 PM
Subject: Re: HP 21MX/F and OS choices (was Lookee what I just got!)
Bob wrote....
How about running TSB out of virtual memory under
IPL. Now you can swap
out parts of your system map at will, think of having instant run-time
overlays...
Terry Newton hacked HP BASIC to run under IPL, run 'BYE' and it returns
control back to the IPL code that called HP BASIC.
HP Basic... sure. I'd be shocked if you could run TSB under it though.
Jay