Date : Fri, 05 Aug 1994 17:09:44 +0000
From : lamcw <lamcw@...>
Subject: Re: Steve's emulators.
hi there,
;> yes there is. if you define disp as a char variable, then the negative
;> sign is automatically taken care of by C. so all you need to code is
;>
;> if <condition true> { disp=<offset>; pc=pc+disp+2; goto next_opcode }
;
;Done it! Thanks. I'd actually done it already though; it is v. fast to do
;it in assembler (a couple of instructions) and my emulator fairly beinifited.
;
;That's a pretty old thread btw - been languishing for a while had it? ;-)
now you know why i just HAD to come off the mailing list, i've just gone
thru all the messages i got 2 weeks ago! (i like to read carefully...)
you mean to say you don't have the beeb OS or BASIC yet??!
um, i've got BASIC working, and a scrolling mode 7 and sphinx adventure
runs nicely and interrupts work. i now have to go off and learn about the
mac toolbox routines to handle graphics...
is the mail still flowing? if everyone's still communicating, i may beg
humbly to be allowed back on (grovel, grovel )
keep in touch,
chris lam,
aston univ.