[Simh] OS development

[Timothe Litt]

On 11-Jun-15 09:17, Johnny Billquist wrote:
>
> DAP is good until 2070 or so. If the DAP implementation on
> Tops-10/TOPS-20 don't do things right at the moment, it's just a local
> bug within those OSes then. RSX and VMS (maybe others) have had DAP
> Y2K secure for many years.
>
DAP for Phase III/IV (V5.6.0) has 2-digit years.  I'm not sure how we
let such a dumb mistake get thru the architecture process, but we did.

T10/20 didn't implement PhaseV, which I haven't looked at.  T10/20
development stopped long before Phase V was defined. 
Upgrading to Phase V DAP is likely more than "a local bug" fix; it's
real work. 
>
> I thought the Tops-10/TOPS-20 stuff was handed over to XKL, but maybe
> someone with better knowledge than me can clarify this.
>
No. XKL had/has a license and could sub-license for use on their
hardware, but DEC retained ownership.  I was peripherally involved.

>
> The legal jungle around the PDP-11 software is a nightmare. The PDP-10
> stuff is easy in comparison, I think.
>
Easy is alway relative to who has to do the work :-)


-------------- next part --------------
A non-text attachment was scrubbed...
Name: smime.p7s
Type: application/pkcs7-signature
Size: 4942 bytes
Desc: S/MIME Cryptographic Signature
URL: <http://mailman.trailing-edge.com/pipermail/simh/attachments/20150612/702e065f/attachment.bin>