Article View: comp.sys.atari.st
Article #41551Running the MIDI ACIA at 500KHz
From: David M. Baggett
Date: Mon, 05 Mar 1990 05:51
Date: Mon, 05 Mar 1990 05:51
17 lines
1092 bytes
1092 bytes
I notice that it's possible to change the clock divider value for the ACIAs, meaning that, in theory, one could run the MIDI port at 500K baud. Normally, the divider is 16: 500KHz / 16 = 31250 baud. Setting the divider to 1 would give a 500KHz clock = 500K baud. Has anyone experimented with this? My initial attempt at this causes the machine to hang, but that might be because the OS code to handle the interrupts is not fast enough to handle that data rate (e.g., the buffer may be too small). Am I re-inventing the wheel, or attempting the impossible? Thanks all, Dave Baggett dmb@cscwam.umd.edu
Technical Details
Message-ID:
<1990Mar5.055110.10206@wam.umd.edu>Path:
arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!samsung!aplcen!haven!wam!dmbShow Full Headers
Complete Article Headers
Path: arc1-ca.pugleaf.net!utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!samsung!aplcen!haven!wam!dmb From: dmb@wam.umd.edu (David M. Baggett) Newsgroups: comp.sys.atari.st Subject: Running the MIDI ACIA at 500KHz Summary: Anybody tried this? Message-ID: <1990Mar5.055110.10206@wam.umd.edu> Date: 5 Mar 90 05:51:10 GMT Sender: usenet@wam.umd.edu (USENET Posting) Reply-To: dmb@wam.umd.edu (David M. Baggett) Organization: University of Maryland at College Park Lines: 17