Path: utzoo!attcan!uunet!snorkelwacker!apple!oracle!news From: pnakada@oracle.com (Paul Nakada) Newsgroups: comp.sys.apple2 Subject: Apple ][+ emulator Message-ID: Date: 27 Mar 90 07:50:29 GMT Sender: news@oracle.com Organization: Oracle Corporation, Belmont, CA Lines: 29 Well, that Apple ][+ emulator is really quite a novelty... it's so simple, it's a crime. Basically all it does is emulate a 6502, with all loads and stores to memory scanned for important locations. The include video memory and keyboard and speaker soft switches. The design allow for extremely easy customization and expansion. I have already added Language card support, with 128K Apple //c like banks not much more difficult. Before 128K though, I am going to bring up Prodos 8 on it. It should be very simple to intercept the Prodos device call and emulate a hard disk in the unix file system. Oh by the way, I added curses support, which (believe it or not) makes scrolling barely useable. It eases the bottleneck by updating the screen only after ~1000 machine cycles and then it update's the whole screen (not a character at a time) Like I said, though... It's really a novelty.. it's real slow on a sparc, but then again, it make's cross development and debugging a cinch on a sparc... anyone know of any debuggers for the Apple ][+? :-) it'd be a breeze to implement a single step/breakpoint debugger on the emulator... maybe this thing's got potential... enough rambling.. what do you all think about this "novelty"? -Paul Nakada pnakada@oracle.com