Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.3 4.3bsd-beta 6/6/85; site sdcc6.UUCP Path: utzoo!watmath!clyde!cbosgd!ihnp4!houxm!vax135!cornell!uw-beaver!tektronix!hplabs!sdcrdcf!sdcsvax!sdcc3!sdcc6!ix469 From: ix469@sdcc6.UUCP (david smith) Newsgroups: net.micro.apple Subject: Re: ae 1200 baud problems Message-ID: <2219@sdcc6.UUCP> Date: Mon, 30-Sep-85 14:31:30 EDT Article-I.D.: sdcc6.2219 Posted: Mon Sep 30 14:31:30 1985 Date-Received: Fri, 4-Oct-85 06:02:04 EDT References: <7536@watrose.UUCP> Reply-To: ix469@sdcc6.UUCP (david smith{|ix}) Distribution: net Organization: U.C. San Diego, Academic Computer Center Lines: 37 In article <7536@watrose.UUCP> cjsgro@watrose.UUCP (Carlo Sgro) writes: >i have run across a problem when i use ascii express or ascom (under cp/m) to >talk to unix at 1200 baud. i frequently lose the first (in ae) or second (in >ascom) character. this doesn't happen at 300 baud and no other characters are >lost. i am currently operating with an emp 1200b modem but will be changing to >a smartteam modem within the week. my serial card is the apple super serial. >i am still running 40 columns and find that the problem occurs every time thaty >the left side of the screen is reached (i.e. at the start and dead-centre >of lines). any suggestions? > > > >-- >--- >Carlo Sgro >...![ihnp4||decvax||allegra||clyde||utzoo]!watmath!watrose!cjsgro I had the same problem on my Apple IIe. Seems that the wonderful screen drivers written by Apple in the monitor (and Apple 80-column card) ROMs are a tad slow, this being the fault of one Stephen Wozniak who contorted the screen memory map all over the place to save a couple of chips, forcing the good ol' 6502 to go thru all sorts of calculations. Anyway, there are three solutions. 1) Re-write the video routines and figure out a way to interface them to AE. 2) Buy a third-party 80 column board. 3) Buy a terminal program that works at 1200 baud. I started on 1, and gave up when I came across three. Now, I'm using Apple Access (from Apple) which deos work at 1200 baud and does a semi-decent VT100 emulation (but not perfect). I do like AE, though and I may still attempt to hack my re-written video drivers into it. If so, I will post to the net. If anyone wants a listing of my semi-finished, faster screen drivers, drop me a note. David L. Smith {ucbvax, ihnp4}!sdcsvax!sdcc6!ix469