Writing emulators [Was: Re: VCF PNW 2018: Pictures!]

Guy Sotomayor Jr ggs at shiresoft.com
Thu Feb 22 11:17:03 CST 2018

> On Feb 22, 2018, at 12:09 AM, Chris Hanson via cctalk <cctalk at classiccmp.org> wrote:
> On Feb 21, 2018, at 11:09 AM, Al Kossow via cctalk <cctalk at classiccmp.org> wrote:
>> That is tricky to cleanly and efficiently implement where each component is modeled independently and
>> glued together with a higher-level framework.
> This is why I wonder if multithreaded emulation might be a reasonable future approach: Model more components of a system as operating independently as they produce and react to signals, have them block when not reacting (either to a clock pulse or a signal), and let the operating system manage scheduling.

This is what some emulators already do: KLH10 (although it does it at the process level with SYS V shared memory) and Hercules.  So there are already existence proofs (and those are just two that are publicly available…many others are not publicly available…e.g. under a paid license).

TTFN - Guy

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