>Megan wrote:
> No, it uses PD.SYS... and the actual code which does the
> hardware control is pretty much in ROM... the PD driver
> calls the ROM, and the ROM knows about RT-11 queue
> elements. It returns with either success or failure.
Jerome Fine replies:
Thank you!
That accounts for the ability to be able to do the LLF.
> The actual memory layout is 60kb with a 4kb IOpage. It
> does not have a memory management unit, so RT11SB and FB
> are the only ones which run on it.
Is there an actual Qbus - or something else? It certainly
sounds like a Qbus!
But without extra memory, let alone an MMU, there
also can't be a VM: either?
Also, I presume there is no possibility of a hard drive?
Also, the Qbus is probably limited and can't actually
have any additional boards?
How many DL ports are available?
Finally, my guess is that SIMH could emulate the PDT-11/150
since all that would be required is the PD.SYS device driver.
But I doubt that there is much of a reason to do so!
Sincerely yours,
Jerome Fine
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Received on Sun Jun 01 2003 - 22:15:01 BST