[Simh] EXT :Re: PDP-11 oddity

[Hittner, David T (IS)]

There was no mention in the 3.8-2 RC1 release notes of a 6800 emulator.
However, Bob hasn't released the final 3.8-2 kit yet.

>1.3 3.8-2
>
>1.3.1 1401
>
>- Added "no rewind" option to magtape boot.
>
>1.3.2 PDP-11
>
>- Added RD32 support to RQ
>- Added debug support to RL
>
>1.3.3 PDP-8
>
>- Added FPP support (many thanks to Rick Murphy for debugging the code)

Dave

-----Original Message-----
From: simh-bounces at trailing-edge.com [mailto:simh-bounces at trailing-edge.com] On Behalf Of Bill Beech (NJ7P)
Sent: Wednesday, June 22, 2011 4:05 PM
To: simh at trailing-edge.com
Subject: EXT :Re: [Simh] PDP-11 oddity

Ok.  How do I get 3.8-2?  Web site still holds only 3.8-1.  I want to 
see if my 6800 emulator made it in.

Thanks!

Bill

On 06/15/2011 01:10 PM, Bob Supnik wrote:
> It's a bug, and it's fixed in 3.8-2:
>
>    05-Jan-11    RMS     Fixed bug in deposit stride for numeric input 
> (John Dundas)
>
> If you want to edit the code, the fix is in dep_addr:
>
> GET_RADIX (rdx, dptr->dradix);
> if ((reason = parse_sym (cptr, addr, uptr, sim_eval, sim_switches)) > 
> 0) {
>     sim_eval[0] = get_uint (cptr, rdx, mask, &reason);
>     if (reason != SCPE_OK)
>         return reason;
>     reason = dfltinc; <<< add this line >>>
>     }
> count = (1 - reason + (dptr->aincr - 1)) / dptr->aincr;
>
> ------------------------------------------
>> Message: 1
>> Date: Wed, 15 Jun 2011 10:47:37 -0500
>> From: Jon Elson<elson at pico-systems.com>
>> To: simh at trailing-edge.com
>> Subject: [Simh] pdp-11 id command quirk
>> Message-ID:<4DF8D419.7060401 at pico-systems.com>
>> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>>
>> Hello,
>>
>> I want to use the pdp-11 sim of simh to teach my kids some
>> machine-language programming.
>> I have it compiled and running on a Linux system.  When using
>> interactive deposit
>> in the PDP-11 simulator, it increments by single byte addresses, so you
>> get :
>>
>> PDP-11 simulator V3.8-1
>> sim>  id 1000-1004
>> 1000:   1234
>> 1001:   2345
>> 1002:   3456
>> 1003:   4567
>> 1004:   5670
>> sim>  e 1000-1004
>> 1000:   002345
>> 1002:   004567
>> 1004:   005670
>> so, you see that only every other deposit address actually wrote to
>> memory, and the examine
>> command properly increments by words. If there is a by-word switch to
>> the id command, I couldn't
>> figure it out from the source or help text. (I do see that id -c writes
>> 2 ASCII characters to even addresses,
>> and writing assembler mnemonics also works, but numeric values increment
>> by one.)
>>
>> I tried the same thing on the vax780 sim, and it works fine, depositing
>> 32-bit values on longword
>> addresses, and then examining them just fine.
>>
>> If there is an option switch that makes it work correctly, I was unable
>> to find that by inspecting the source
>> or the documentation, or searching the simh archives.
>>
>> Thanks,
>>
>> Jon
>>
>>
>> ------------------------------
>>
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>> End of Simh Digest, Vol 91, Issue 6
>> ***********************************
>>
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