These are the assorted '51 files from the Signetics bulletin board in Sunnyvale,
with the duplicates already on the Circuit Cellar BBS not included.  Have fun!


CLOCK.ASM      14,336   07/29/90 |  REAL-TIME CLOCK AND POLLED SERIAL EXAMPLE
                                 |  FOR THE CHARGECARD CONTROLLER

COFFEY.ASM      4,096   9-07-90  |  A simple program to display the contents
                                 |  of the S87C752 A/D SFRs

DEBUG51.ASM    13,312   08/20/90 |  PUBLIC DOMAIN 80C51 CODE DEBUGGING TOOL
                                 |  COURTESTY OF AXONN VIA BRIAN HARRIS FAE

DEMO752.ZIP     2,809   03/08/90 |  Demonstration program for the A/D and
                                 |  PWM features of the 87C752.

I2C552-C.ZIP    8,192   05/21/90 |  I2C drivers for the 8xC552 written in C.
                                 |

I2C8584.ZIP     9,216   05/21/90 |  Code from app note on using the 8584 I2C
                                 |  to parallel bus controller w/ the 80C31.

I2CAPP.ZIP      4,136   11/02/89 |  Source code for the app note AN422 on
                                 |  single master I2C with the 87C751/752.

I2CBITS.ZIP     9,998   08/16/90 |  I2C single master code for ANY 8051 type
                                 |  controller. 'Bit bangs' I2C on a port.

I2CDEMO.ZIP    15,257   09/08/89 |  I2C Evaluation Board control program
                                 |  source (for 87C751).

I2CINIT.ZIP     3,853   01/30/90 |  Lets 87C751 do system init of I2C and
                                 |  other devices (with reset pulse).

I2CREDBK.ZIP    4,384   09/26/89 |  I2C Multimaster plus Slave functions in
                                 |  one 751 program (from the 'Red Book').

I2CSLV.ZIP      3,072   04/25/90 |  I2C slave routines for the 87C751 and
                                 |  752.

I2CUART.ZIP     7,270   11/03/89 |  87C751 program to allow RS-232 device to
                                 |  become an I2C bus master.

INTRUPTS.ASM    4,352   07/25/89 |  From "Example programs for the `C51
                                 |  Family" GC

MON.C           7,168   9-07-90  |  SIMPLE-MINDED MONITOR IN `C' - file not
                                 |  all there at the end?

PRN256K.ZIP     4,099   07/15/89 |  83C451 code for a 256K printer buffer
                                 |  application. Schematic is in User Guide.

RS751.ZIP       2,524   09/28/89 |  Simplex RS-232 routines for the 751 and
                                 |  752 microcontrollers.

SAMPLES.ASM    34,048   07/29/90 |  SAMPLE 80C552 SUBROUTINES- SYTRONICS.INC
                                 |  P.O.BOX 1087 MARS HILL,N.C. 28754

SERIAL_1.ASM    5,120   07/25/89 |  87C751 serial stream generator. Code
                                 |  provided Jan `89. GC.

SIO_NEW.ASM    18,048   07/29/90 |  SIO ROUTINES FROM RED BOOK, IMPROVED BY
                                 |  SYTRONICS FOR READABILITY...

TIMERI.ZIP      1,923   08/31/89 |  Examples of Timer I used without I2C on
                                 |  the 83C751/752 microcontrollers.

WARMBOOT.ZIP    2,816   06/19/90 |  Demo program to distinguish warm & cold
                                 |  start conditions on 80C51 based parts.


Note to readers - the I2C bus that Signetics copyrighted is similar to other
3 and 4 wire busses by Motorola, National and Intel, and it's quite possible
that chips for one bus will work in another brand of bus.  Check the specs and
go wild, but watch out for timing and protocol.  I just made the connection, and
haven't had the time to check it out yet.  Other copyrighted busses are:

National - Microwire (?? is it still around?)

Motorola - Serial Peripheral Interface

Intel    - BitBus

The various Japanese and Korean chip houses likely have similar busses, but I've
had lousy luck getting data books or samples out of 'em, so typically use local
manufacturers.  What good are chips you can't get or get info on??