Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!utgpu!water!watnot!watmath!clyde!rutgers!ames!ptsfa!ihnp4!homxb!mrw From: mrw@homxb.UUCP Newsgroups: comp.sys.ibm.pc Subject: Re: Screen Scroll Speed on ATT6300 Message-ID: <195@homxb.UUCP> Date: Thu, 2-Apr-87 10:09:24 EST Article-I.D.: homxb.195 Posted: Thu Apr 2 10:09:24 1987 Date-Received: Sat, 4-Apr-87 15:24:23 EST References: <750@oliveb.UUCP> Organization: AT&T Bell Laboratories, Holmdel Lines: 27 Keywords: flow control with medium speed serial interface Summary: Speeding up 6300/6300+ scrolling In article <750@oliveb.UUCP>, slif@oliveb.UUCP writes: > Jean-Pierre Dumas writes: > > Can anybody help/give a solution/explain why the scroll speed > > on my Olivetti M24 (AT&T 6300) is at least 4 times slower than > > on a IBM PC ??? > > Unlike the IBM BIOS, the 6300 BIOS writes to the display only during > horizontal and vertical blanking times. This gives a flicker-free > and snow-free display. However, this means that screen updates will > be slower on the 6300 than on true blue. Also, since the 6300 uses > a display which has TWICE the number of lines, there is less blanking > time available. For what it is worth, using Fansi-Console (sold by Hersey Micro Computing) will speed up 6300/6300+ screen scrolling to something unbelieveable. Fansi-Console replaces the entire screen and keyboard bios routines (which means, of course, you get about 30K less of ram to play with) and uses, amongst other things, hardware scrolls and "word writes" to speed up the screen displays. I've tried it on my true-blue IBM at home and it speeds that machine up, but not as much as the 6300 at work. I have no connection with Hersey other than as a satisfied customer. Ken Becker hotlv!kab The opinions expressed above are my own and not those of my employer.