[Simh] Simulating a GT40

[Timothe Litt]

On 04-Sep-18 15:09, Paul Koning wrote:
>
>> On Sep 4, 2018, at 3:06 PM, Lars Brinkhoff <lars at nocrew.org> wrote:
>>
>> Timothe Litt wrote:
>>> If a ROM device is added to the -11, I suggest that:
>>> a) It be capable of multiple units
>>> b) each unit with a start address (in I/O space) & length
>> I was going to do this, but I quickly learned that a SIMH unit can't
>> have a base address of its own.  All units share the address region
>> defined by the governing device.
> Another way to handle ROM would be to have a switch on the LOAD command that tells it to permit binaries that have load addresses in I/O space.  Then your current ROM devices config would be "whatever is loaded by the load commands I have issued".
>
> 	paul
>
That's an interesting approach, but it may or may not provide the
correct length.  And it doesn't handle power-on boot/dip switches.

A unit doesn't have to be a UNIT; one can clone a master DEVICE to get
multiple address ranges.  It's been a while, but I'm pretty sure I did
that for some device.



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