IMS103@psuvm.psu.edu (Ian Matthew Smith) (03/21/91)
I just downloaded MED 3.00 (I had been using 2.13 with no problems) and it is interfering with mu terminal program. Running MED songs (especially ones with synth instruments) causes VLT 5.045 to loose characters at 2400 baud. This did not happen with 2.13 before. Upping the priority of VLT does not seem to help. My friend has observed the same problem on his Amiga also. This is highly annoying, as file transfers are impossible with MED playing. Other than that, MED 3.00 is an exelent program. Any ideas? - Ian Smith <<ims103@psuvm.psu.edu>>
C503719@UMCVMB.MISSOURI.EDU (Baird McIntosh) (03/21/91)
In Message-ID: <91079.202357IMS103@psuvm.psu.edu>
IMS103@psuvm.psu.edu (Ian Matthew Smith) said:
>I just downloaded MED 3.00 (I had been using 2.13 with no problems)
>and it is interfering with mu terminal program. Running MED songs
>(especially ones with synth instruments) causes VLT 5.045 to loose
>characters at 2400 baud. This did not happen with 2.13 before.
>Upping the priority of VLT does not seem to help. My friend has
>observed the same problem on his Amiga also. This is highly annoying,
>as file transfers are impossible with MED playing. Other than that,
>MED 3.00 is an exelent program. Any ideas?
I believe this is because MED 3.00 uses the CIAB timer instead of CIAA.
CIAA is for *system use only*, but some programs used it anyway in the
recent past (MED, Sonix, ...). Anyway, CIAA has a higher priority than
the serial.device which, in turn, has a higher priority than CIAB.
I'm sure someone else will step in and give you a more technically correct
explanation, but basically the 'problem' is:
In making bids for processor attention, the serial.device gets the
first grabs over the CIAB.
This doesn't solve your problem, and I fairly butchered the explanation.
God, I feel awful. :-)
| Baird McIntosh | c503719@umcvmb.missouri.edu <-or-> c503719@umcvmb.bitnet |
| "The needs of the many outweigh the needs of the few." |
| "Let's go!" LEMMINGS "Oh no!" |IMS103@psuvm.psu.edu (Ian Matthew Smith) (03/22/91)
In article <910321.000737.CST.C503719@UMCVMB.MISSOURI.EDU>, C503719@UMCVMB.MISSOURI.EDU (Baird McIntosh) says: > >I believe this is because MED 3.00 uses the CIAB timer instead of CIAA. >CIAA is for *system use only*, but some programs used it anyway in the >recent past (MED, Sonix, ...). Anyway, CIAA has a higher priority than >the serial.device which, in turn, has a higher priority than CIAB. > >I'm sure someone else will step in and give you a more technically correct >explanation, but basically the 'problem' is: > > In making bids for processor attention, the serial.device gets the > first grabs over the CIAB. > >This doesn't solve your problem, and I fairly butchered the explanation. >God, I feel awful. :-) Hmmm, I take it you mean that the CIAB gets first grabs over the serial.device, since my term program is teh one loosing chacarters. well, I upped the priority of both my terminal program and the serial.device interupt. I still loose characters. This is annoying. Any hardware people out there want to add a buffer to the serial port as a project? :-) That should solve the problem I would think. - Ian Smith <<ims103@psuvm.psu.edu>>