Xref: utzoo comp.sys.apple2:3217 comp.os.cpm:3858 Path: utzoo!attcan!uunet!samsung!zaphod.mps.ohio-state.edu!usc!rutgers!uwvax!astroatc!nicmad!madnix!deety!rat From: rat@deety.UUCP (David Douthitt) Newsgroups: comp.sys.apple2,comp.os.cpm Subject: Apple can't keep up with 2400 baud Message-ID: Date: 27 Jun 90 06:44:00 GMT Lines: 23 I'm running an Apple II+, 4 MHz Zip Chip, 6 MHz PCPI Applicard with ZCPR 3.0 (CP/M) - the serial board is the Apple Super Serial board. The switches all seem to be set appropriately. However, I don't think interrupts will help here. The patch for the CP/M programs I use for the modem talks to the 6522 port directly, using memory peeks and pokes from the CP/M side. Seems to me that there was some sort of Super Serial card support built into the BIOS of the PCPI CP/M. Does anyone know more about this? If that doesn't help, perhaps I should write a driver for the SSC which supports interrupts and get my characters from that. Anyone know how to write PCPI drivers? I thought not. :-( -- ====== David Douthitt ======== aka "The Stainless Steel Rat" ==== UUCP: uwvax!astroatc!nicmad!madnix!deety!rat InterNet: madnix!deety!rat@spool.cs.wisc.edu <<< Home of Mad Apple Forth and the Tiger Toolbox -- Apple II Forever! <<< If my next computer isn't an Apple II, it won't be a Macintosh.