|Re: Hp-41 time module options|
Message #19 Posted by Diego Diaz on 10 Dec 2011, 8:21 a.m.,
in response to message #18 by Raymond Wiker
And again sorry to join this thread so late.
Most of Monte's reasons to discard TIME module into CL logic are applicable for the Clonix approach.
TIME module is *not* a simple ROM pac but a very complex peripheral device wich has a whole set of dedicated commands and can both "request" CPU attention and make its own "decisions" according to events requirements like alarms.
Current Clonix family only handles a few "commands" (or pseudo commands) that is some codes that 41CPU cosiders as NOP's.
Only exception is the emulation of the double X-MEM memory for the Clonix-D or NoV-64 which decodes a few "real" intructions.
All of the above does not means that the project itself is not appealing... on the contrary, it certainly is!! :-)
However, it may well be a little too much for the limited processing abilities of the microcontrollers used into Clonix or NoV; and one thing is for sure: HW desing *must* be very different.
So, the other point would be: are not enough TIME modules out there to fulfill the HP-41CL's users needs?