hp41c Time module clone

[cruff]

(05-29-2014 09:22 PM)GeorgeOfTheJungle Wrote:  'TAS'? What is 'TAS'?

The Auction Site that shall not be named. :-) Starts with an 'e' and ends with a 'y'.

Quote:Anybody knows how does it work? The time module, I mean?

Reasonably well enough that Monte Dalrymple has a prototype clone in new hardware he has tested with the 41CL CPU replacement hardware. If you take a look at the HP41 hardware documentation and the time module ROM assembly code you can see how it is managed. The 41CL is documented at NEWT Microprocessor Technical Manual, which has some good information.

Quote:How does it do to wake up a sleeping 41c?

It causes a hardware interrupt by the appropriate signalling on the I/O interface lines.