Re: [Simh] pdp 11 timing

2020-07-20 Thread Johnny Billquist
On 2020-07-20 23:18, Paul Koning wrote: On Jul 20, 2020, at 5:10 PM, Paul Moore wrote: (I am writing my own emulator just because I have never done that before, and the PDP 11 is such a pivotal system in the history of modern computing it seemed worth learning about, and what better way

Re: [Simh] pdp 11 timing

2020-07-20 Thread Johnny Billquist
Instruction timing as such is not relevant. Different implementations had very different timings, not to mention that speed of memory also makes a difference. Devices basically do not have a strict timing either, but yes, there is plenty of software that assumes that an interrupt does not

Re: [Simh] pdp 11 timing

2020-07-20 Thread Paul Koning
> On Jul 20, 2020, at 5:10 PM, Paul Moore wrote: > > (I am writing my own emulator just because I have never done that before, and > the PDP 11 is such a pivotal system in the history of modern computing it > seemed worth learning about, and what better way to learn than to emulate it ) >

[Simh] pdp 11 timing

2020-07-20 Thread Paul Moore
(I am writing my own emulator just because I have never done that before, and the PDP 11 is such a pivotal system in the history of modern computing it seemed worth learning about, and what better way to learn than to emulate it ) So how important is timing of instruction execution and device