While we on the subject of the 23, I just installed a RQDX2 controller in my
23+ and hooked up an RD-53 to it. My maint pack only has a RQDX exerciser and
not the format program. I assume this was for the RQDX1. Does anyone have
available on the web or know where I can find the XXDP format program. It
should be ZRQB??.BIN.
Brian.
Megan wrote:
> >I think he's talking about the opposite of what you mean. You mean using
> >RAM as a disk, right? I believe he means using disk for RAM. Which is
> >something I personally try to avoid like the plague!
>
> Actually, it gets more confusing with RT-11, since the term 'virtual
> memory' refers to the address space a program can access... it has
> nothing to do with disk space...
>
> The way to think of it is -- physical memory is the memory the machine
> has while virtual memory is what a program can see at any one time.
> And with 16 bits worth of address space, that maximum is 32kw (64kb)
> at any one time... of course, you can remap portions of your address
> space to elsewhere in physical memory, but you are always limited to
> accessing 64kb at one time (128kb -- 64kb I-space and 64kb D-space if
> you have a processor with separated I and D spaces)
>
> Megan Gentry
> Former RT-11 Developer
>
> +--------------------------------+-------------------------------------+
> | Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com |
> | Unix Support Engineering Group | (home): mbg!world.std.com |
> | Compaq Computer Corporation | addresses need '_at_' in place of '!' |
> | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ |
> | Nashua, NH 03062 | "pdp-11 programmer - some assembler |
> | (603) 884 1055 | required." - mbg |
> +--------------------------------+-------------------------------------+
Received on Fri Mar 24 2000 - 06:33:30 GMT