6 Mar
2011
6 Mar
'11
11:10 p.m.
On 3/6/2011 8:56 PM, Fred Cisin wrote:
On Sun, 6 Mar 2011, Michael B. Brutman wrote:
Luck and some digging around has turned up information faster than
usual. Somebody I knew from PCjr experience was working with this same
box recently, adding support to MESS (Multiple Emulator Super System).
And he pointed me at somebody's blog where they discussed all of the
short comings of the device, and even provide a better ROM for the
microcontroller to help the flow control.
So I'm happy for a bit, and now I'm going to learn about LPC encoding ...
Mike
This is an external voice synthesis box based on
an Intel 8031
micro-controller and a TSP5220CNL synthesis chip. It has an RS232
interface, volume and tone knobs, a headphone jack and an RCA jack for
external audio.
Does anybody remember these things and how to talk to them? I've tried
all of the various bps rate and parity combinations from 300 to 19200
and I can't get anything response (data or sound).
I don't remember anything useful. Usually.
I remember connecting a serial voice output unit to a TRS80 model 2, at
the request of a Radio Shack "Computer Center". They gave me a Model 2
Technical Reference Manual (in addition to my invoice) for doing it! The
part that is relevant is that it required, for it's handshaking, a jumper
on a DB25 connector that was NOT pins 1 through 8 or 20. It may have been
10, 12, or 22, none of which made any sense to me at the time, but that is
what that peripheral demanded.