news@macuni.mqcc.mq.oz (USENET News System) (11/27/90)
>In a message >> From: nugteren@pttrnl.nl > >Nils Nugteren asks: > >> I have written an interrupt handler in Think C, that catches incoming >> characters from the serial port and manipulates these in the background >> (i.e. invisible to the user). It works fine as an application, but I >> am having troubles installing it in the background (memory resident etc.). >> I'm new to MacIntosh programming so I would appreciate any help greatly. > >Nils, my serial drivers patch themselves into the level 2 dispand reprogram the SCC completely. What you are trying to do is somewhat >different so take these suggestions with a grain of salt. From: s8925188@mqcomp.mqcc.mq.OZ (Philip Craig) Path: mqcomp!s8925188 Chris has reprogrammed the SCC completely, he says above. My questions are related to this: Has anyone else done this, and how hard or easy was it to do? I am interested in running the SCC in a synchronous mode and using it's HDLC capabilities. Has anyone done this? Can you show me some source code :-) ? I am also wondering: is the complete SCC functionality still there in the later models with all the VLSI chips? I mean, the Z8530 chip seems to have gone the way of the dodo in my IIfx, is it completely emulated by Apple's replacement, or is only the functionality that Apple uses ported across? ------------------------------------------------------------------ I've got this terrible pain in all the diodes down my left side... ACSnet ( s8925188@mqcomp.mq.oz ) UUCP ( uunet!munnari!mqcomp.mq.oz!s8925188 ) Internet ( s8925188%mqcomp.mq.oz@uunet.uu.net )