[Simh] TOPS-20 Source with KMC11 Driver Code?

[Timothe Litt]

Hopefully, when the KDP is working Rob will merge (and if necessary 
debug) my changes & commit them to fix both problems.  Ideally adding 
the page optimization, but beggars can't be choosers.  If he doesn't 
I'll try to get to that later (if I have commit access to simh on github).

I suppose I should see about building a current version, as I seem to be 
in the middle of debugging several things  by Braille... (Or is this 
simply a memory test for me :-)

This communication may not represent my employer's views,
if any, on the matters discussed.

On 27-May-13 11:48, Mark Pizzolato - Info Comm wrote:
> On Monday, May 27, 2013 at 6:19 AM, Timothe Litt wrote:
>> This thread is getting far too messy.
>>
>> The increment problem found by Rob is NOT subtle.  It's just plain broken.
> I agree 100%.
>
> The code, as written, would write twice as much simulated memory as intended which usually would crash things nicely (and did when Rob tried with the DMC).
>
> I found that the ONLY current use (prior to Rob's DMC) of this routine was in the CD11 simulator and that use either might never actually get executed (if the CDCSR_V_PACK bit not been set), OR if it was actually executed it would have been with the constant byte count of 2 which should have written 1 16/18 bit word, but actually wrote 2 due to the bug.  This may have never been exercised, OR writing the second word may have merely written the high bytes 18 bits of a word which was never referenced by the program...
>
>> The mishandling of the high bits is what I meant when I wrote 'subtle'.
> Understood.
>


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