> The Atmel AVR 1200 controller has the same type of I/F. They can be
> programmed in-circuit from the printer port with a capacitor between two
> of the pins - virtually zero hardware. 1200 programming software and
> hardware details are here:
>
>         http://www.sistudio.com/avr.html
>

Thanks Leon.  I also had a message from Antii himself to this regard.
I have not yet tried it, but will do so real soon and report back.
 I quote from Antti's  message just for  interest:

> From:          antti@sistudio.com
> Date:          Mon, 03 Nov 1997 18:49:17 -0400
> To:            wterreb@plessey.co.za
> Subject:       Re: Downloadable Microcontrollers

> [snip AT89S8252 stuff]
>
> >has also already looked into this and know of an easy
> >implementation, then I would very much like to hear from you.
>
> yes, at least experimentaly, a cheap (wires only) interface similar
> to AVR downloader was used with PIP04 software to program 89S8252. I
> am not sure if the current public release of PIP04 still supports
> 8252 but it might. Unfortunalty I cant check it right now as I dont
> have any more that cheap programmer interface :(
>
> The programming algorithm is very simple. One solution to make a
> programmer is to program an AT90C2051 with Atmel dev board firmware
> and use AVRPROG.EXE, it should support the 8252 too. //
>
> My application was porting MCS-51 Tiny Basic to 89S8252, makes
> pretty neat single chip basic: editor and interpreter all in single
> chip (ie using the internal EEPROM).
>
> cheers antti
--
Werner Terreblanche     http://users.iafrica.com/w/we/wernerte/index.htm
wterreb@plessey.co.za (work)  OR  wernerte@iafrica.com  (home)
Plessey SA, PO Box 30451,Tokai 7966, Cape Town, South Africa
or at home : Suite 251, PostNet X5061, Stellenbosch, 7599
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