Hi,
>
> Down the road I want to change CPUs as 8748s are getting harder to come
>by. With a CPU change, I can start to do things like add MIDI, integrate
>the key assigner (a separate CPU on the KLM-366 board) and generally make
>things more efficient such as eliminate the battery-backed SRAM and use
>the new MCU's internal user data flashrom area to store patches..many more
>than 32 patches, btw.
>
yes, maybe some Kind of a ATMEL MCU like the 8535 would me IMO
interesting for this board cause of 8K Code Space, 512 Bytes of EEPROM
(a bit few), 32 I/O-Lines, 3 PWM-Channels and eight 10-BIT A/D´s.
Additionally you have a SPI for in-System-Programming and afaik a
programmable Serial Interface (so you can add easy a midi-Solution).
Other Problem is that he is not Pin-compatible to the 8048, so a
completely new (or re-wired Socket of IC22) Board would be a -must- for
changing the MCU. On the other Hand i think that much Parts of the
KLM-367 can be replaced with this MCU, like the variable Resistors for
MG Level, PWM Rate etc. You have to use 6 A/D´s for those resistors, one
for reset_adj and additionally one for the Knob-Board (which needs afaik
all in all 4 Adress lines; three for the 4051´s, one for changing
between both 4051´s; and one Data-Line).
For additional functions would be much easier IMO to build a new Board
from scratch with a new MCU and a own program (presupposed someone knows
exactly which pin on which connector has which function)....
Otherwise, has anyone ever read out the 8048 and had a look into the
code? I can program in Assembler; proably i can analyze the Code of the
8048 and make it compatible to the 8535 with a few re-programming....i
have two 8048´s from two 367´s here, but i can´t read them out, cause i
have no Device to do so.....
Greetings
Stef