I am modifing a software for the MC68HC908. In the original software, there is a part which is written in assembly language:
byte tcount, delay, count=10, data, ptr=0;
data = Msg[ptr];
BCLR 5, PTB ; Clear the output
DBNZ count, next
I have learnt assembly language long time ago, is there a guide for programming assembly language for this NXP microcontroller?