during development of my NC200 emulation for M.E.S.S.
This update does not cover the NC150. I do not have details of any differencesbetween this and the NC100 at this time.
When I have information on this system, it will be documented here.
of I/O read/writes.
* The NC200 does not have a TC8521 Real Time Clock, instead ithas a MC146818 Real Time Clock. The MC146818 is no longer produced now,but is part of many PC designs.
* The NC200 has a [[NEC765 ]] compatible floppy disc controller. The discinterface was designed by Ranger Computers.
The ports listed in this section are different or have additional
* The NC100 clock speed is 4.606Mhz606MHz, at this time it is unknown if the NC200has a different clock speed.
* The NC100 on/off button generates an NMI.