Re: Audio cassette interface

[brizza <nbri...@optusnet.com.au>]

Hi Max,
As soon as the chips arrive (this week, i hope:-) I'll try the CON
command.Thanks again.

Regards,
Nik

On Apr 6, 7:28 am, Max Scane <mjs...@gmail.com> wrote:
> If the tape system is using the same hardware as the console then you could
> replace PUN: and RDR: with CON: and pip will talk to the console interface
> instead think.
>
> I suspect that your tape interface will require a much slower baud rate (600
> or 1200) than a normal console though.  It might be easier to use a separate
> serial interface (such as the Z80 Peripherals card) or a dedicated UART.
> You could then add the PUN/RDR driver in CBIOS.
>
> Max.
>
> On Mon, Apr 5, 2010 at 5:46 PM, brizza <nbri...@optusnet.com.au> wrote:
> > Hi Max,
> > Thanks for that. The PIP commands will come in very handy! The system
> > is attached to the same I/O line that operates the terminal device
> > through the serial port. So the cassette system will appear to the
> > computer as a keyboard when playing back and a display during
> > recording. Not sure about CBIOS drivers. No mention of a punch device
> > in the current CBIOS. I would need some help with that if anybody is
> > willing?
> > Also this system follows the Kansas City Standard for recording and
> > sounds like a very basic interface. I'm hoping it will work out of the
> > box :-)
>
> > All the Best,
> > Nik
>
> > On Apr 4, 5:00 pm, Max Scane <mjs...@gmail.com> wrote:
> > > Hi Nik,
>
> > > CP/M was written with punch/reader type storage in mind.  There is a BIOS
> > > call (punch/reader) that allows you to write/read to these devices and
> > these
> > > cals are supported in PIP..
>
> > > Once you have the appropriate drivers in the CBIOS you can use pip to
> > > read/write to these devices:
>
> > > eg. read from the reader until EOF is reached:
>
> > > pip text.txt=RDR:
>
> > > or write a file to the punch:
>
> > > pip PUN:=text.txt
>
> > > Nothing else is really needed.
>
> > > Max
>
> > > On Sun, Apr 4, 2010 at 11:00 PM, brizza <nbri...@optusnet.com.au>
> > wrote:
> > > > Hi,
> > > > I came across an article from 1976 that explains how to build  a tape
> > > > memory system that uses an RS232 terminal port. I found it quite
> > > > interesting and so wired up a prototype board and hope to be testing
> > > > it soon with my N8VEM as soon as the chips arrive. Link to picture of
> > > > the board minus the chips below.  The system is similar to an ASR TTY
> > > > paper tape storage system but uses an audio cassette recorder instead.
> > > > So i'm hoping to use CP/M's commands to comunicate with the interface
> > > > board. All the system really needs to work is software for low speed
> > > > paper tape loading and punching, but so far i have'nt been able to
> > > > find anything on the internet. Any ideas?
>
> > > >http://picasaweb.google.com/Brizza62/DropBox#5456258155591248466
>
> > > > Cheers,
> > > > Nik
>
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