ASSAD, I had been working long time with HC11. I have somewhere AS11, Buffalo, RS232 communication soft, many usefull assembler programms- different drivers. But al in DOS. If you have interest, pls contact to metero(at)abv(dot)bg. Please, place in subject " hc11" to ensure that it's not spam.
After PIC's you can find HC11 very strange- but it's much friendly and easyer. I could explain you " how to" for the main things.