cjsgro@watrose.UUCP (Carlo Sgro) (09/16/85)
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 Formerly: ...!watmath!watcgl!electro!carlo and Also: ...!ihnp4!chinet!dagwood "ihnp4 Express: Overnight to the USA or you don't pay!"
ix469@sdcc6.UUCP (david smith) (09/30/85)
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