Hello all,
I need to attach a collection of UARTS to an RCM2200. 8 bits of data and 4 bits of address are brought off of the RCM module along with /IORD and /IOWR. I can't see any other relevant signals.
Am I correct in thinking that I need to qualify /IORD and /IOWR appropriately - to generate an individual /IORD and /IOWR for each peripheral - I plan to use PortB as the address qualifier, probably with some HC138s.
On the HC138s, /IORD will feed /G2A, Port B will feed A/B/C and Y0..7 of the HC138 then become /IORD_0..7. Same applies (on a different HC138) to /IOWR to generate 8 individual strobes, /IOWR_0..7.
I assume that I will need to write some assembler (last time I checked, Dynamic C didn't support I/O directly) to do the I/O bashing.
Any thoughts or words of advise before I climb into this next design ?
Thanks,
Mark.