[LAD] [Fwd: Re: No nagging, a serious question]

[Gene Heskett]

On Sunday 04 July 2010, Gordon JC Pearce wrote:
>On Sun, 2010-07-04 at 22:16 +0100, Dan Mills wrote:
>> You could probably hack a multi serial port card to do multiple midi
>> ports (Change the rock to give a suitable divider for 31250 baud
>> (4MHz?), add current loop interfaces)...
>
>Been there, done that - when I was a penniless dole-scrounging scruffy
>university drop-out living on a farm in the middle of nowhere, I decided
>I needed a MIDI sequencer.  So, I modified an old serial card with a
>4MHz crystal which divides to 31250 baud, and wrote a simple
>tracker-style sequencer in a mixture of C and assembler on DOS.  It
>worked, kind of.  If you wanted to do anything really wild like change
>the tempo you needed to recompile.
>
>Gordon MM0YEQ
>
As for the serial card with a different crystal, BTDT, on a TRS-80 Color 
Computer 3.  Not only that, but the software, Ultimuse-III, written by Mike 
Knudsen could handle the serial card and the bitbanger at the same time, so 
I actually had 2 ports and drove two different midi keyboards each with 
their own midi voice assignments.  This on a machine with 60 ticks/second 
IRQ's for a clock.  And neither port had any extra added buffers, it Just 
Worked(TM).

-- 
Cheers, Gene
"There are four boxes to be used in defense of liberty:
 soap, ballot, jury, and ammo. Please use in that order."
-Ed Howdershelt (Author)
Any sufficiently advanced technology is indistinguishable from a rigged 
demo.