Hi Willard,
Can you add an wrapper entry for the FINDFREQ ROM routine that finds the
frequency
of the cassette port input?
Here's the info from the Covington map file
6FDBH - Find the frequency of the cassette port. This routine
measures the duration from the start to the stop of half of
the wave presented on the cassette port. The result is the
number of 29 t-state cycles required to find the end of the
wave. The byte at FF8EH determines if the count will trigger
on a high or low pulse. For example, a 1200 hz signal, which
would take 416 ms to go through half of the wave, would cause
this routine to exit with a value aound 35. If the sound
option is turned on (see FF44H), this routine will click the
beeper on each call. Note: Although this routine analyses
the cassette port in 29 T-state intervals, the actual routine
requires much more time to execute.
Exit:
C - Number of 29 T-state cycles
A - Destroyed
C flag - Set if the routine was canceled by a shift break
Thanks,
Douglas
On Thu, Jul 27, 2017 at 1:59 AM, Willard Goosey <goo...@sdc.org> wrote:
> The Model 100 library for Small-C 85 has been uploaded to:
> http://www.sdc.org/~goosey/m100/m100smallc0.0.7.zip
> -and-
> to my ("Willard Goosey") personal library at Club 100, under "linux
> cross development".
>
> In this release, the Printer output functions, printr(), prttab(), and
> pnotab() were verified as working, and test code and documentation
> added.
>
> This marks the first time I've had a dot-matrix printer hooked up since
> 2011... Did you know that the IBM proprinter has a dip-switch setting
> to let CR=CRLF just like Tandy printers? I didn't either, until I read
> the DOCS! :-) (And yes, you can still get ribbons for a Proprinter!)
>
> Next comes a bit of a long slog, as I need to verify that the wrapper
> functions for all the rs232 ROM calls are correct... After that, I
> should be clear to call it beta and freeze the spec for the wrapper
> functions.
>
> Willard
> --
> Willard Goosey goo...@sdc.org
> Socorro, New Mexico, USA
> I search my heart and find Cimmeria, land of Darkness and the Night.
> -- R.E. Howard
>
