carlitz@unix.cis.pitt.edu (Robert D. Carlitz) (10/18/90)
After several days of reading the kermit documentation and experimenting with various machines, I would like to know if the problem I have solved is a real one - and if the solution I have found is the only possibility. Here's the problem: I'm running Kermit 3.86 on an Apple IIGS in VT-100 emulation mode. When the IIGS receives a BEL character (CNTRL-G or \007), it drops several of the characters which follow. The louder the bell, the more characters that get dropped. An immediate symptom (for those of you who may have had a similar experience) is that when I start up EDT on a VMS system to edit a new file, the bell rings and only a fraction of the warning "file does not exist" gets displayed on the screen. The solution: use the Control Panel to turn the volume off, so that only a "visual bell" or screen flash is employed. Now no characters are lost, and everything works just fine. On an Apple IIe there is no problem of this sort. Have I missed something obvious in the operation of the IIGS? Is this a familiar problem with programs using the bell on this machine? Have I made some obvious configuration error? I was surprised to find no mention of this problem in the kermit documentation. In fact, I suspect I have overlooked something simple and obvious (or obvious to those to whom it is obvious - certainly not to me). Thanks, Bob Carlitz - carlitz@unix.cis.pitt.edu
alfter@uns-helios.nevada.edu (SCOTT ALFTER) (10/19/90)
My guess (as someone who doesn't have a GS, but who has been working on a
terminal program) is that the GS bell kills interrupts. Kermit relies on
interrupts to tell it when a character has arrived from the remote system. If
the firmware shuts off interrupts, any characters that arrive will be lost.
The IIe bell, on the other hand, doesn't turn off interrupts. You will notice,
though, that the bell sounds a bit different if a bunch of characters keep
coming in after the bell--the pitch is lowered, and the bell may sound
scratchy. This is the result of the terminal program's interrupt daemon
kicking in while the bell is dinging.
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Scott Alfter _/_
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Internet: alfter@uns-helios.nevada.edu ( ( the power to be your best!
GEnie: S.ALFTER \_^_/toddpw@tybalt.caltech.edu (Todd P. Whitesel) (10/19/90)
The GS BELL routine turns off interrupts, diabling serial port receiving until the bell is over. I use an init that patches the bell vector so it acts just like the original bell and allows interrupts. Appletalk, however, can't avoid dropping characters during long packets, so I don't use the GS for serial communications. (I use the //+ and my own studly little terminal program.) Todd Whitesel toddpw @ tybalt.caltech.edu
MQUINN@UTCVM.BITNET (10/19/90)
On Thu, 18 Oct 90 16:58:55 GMT <info-apple-request@APPLE.COM> said: >possibility. Here's the problem: I'm running Kermit 3.86 on an Apple >IIGS in VT-100 emulation mode. When the IIGS receives a BEL character >(CNTRL-G or \007), it drops several of the characters which follow. The Just a few days ago, someone posted a fix for that called CHIRP. It's a replacement bell for the GS and IS interruptable so you don't loose characters. > >Thanks, >Bob Carlitz - carlitz@unix.cis.pitt.edu ____________________________________________________________________ | | | | This is your brain... | BITNET-- mquinn@utcvm | | This is your brain on drugs... | pro-line: | | This is your brain on whole wheat.| mquinn@pro-gsplus.cts.com | |____________________________________|_______________________________|