NP-41 Emulator (may be)

[J-F Garnier]

(01-29-2016 01:43 AM)rprosperi Wrote:  

(01-29-2016 01:21 AM)Chris Chung Wrote:  Bob, I am currently running the 41CV ROM that comes w/ nonpareil, there is also a 41CX ROM that I have not try yet. As I understand that it has RTC. I haven't install clock crystal on the NP41S (I will called this design NP41S to differentiate it w/ the 14 segment 128K FRAM unit) but plan to make that available and try the CX ROM.

The CX adds a RTC, but also a bunch of general-purpose advanced programming commands, plus access to Expanded Memory.... The CX RTC also includes setting multiple alarms which can simply beep or launch programs, auto-repeat on regular cycles, etc.

Chris, the 41CX ROM has 3 pages more than the CV, and uses bank-switching.
So it depends if you have enough page space available to hold this version.
If, as you mentioned, you only have two free pages, you may start with use the CV ROM and include the Extended Function ROM and Time ROM, even if there is no accurate crystal-based 32kHz clock yet. These are the two most important extension ROM, and it will be approximatively equivalent to the CX.