Re: A85: Programming help

To: assembly-85@lists.ticalc.org
Subject: Re: A85: Programming help
From: Humberto Yeverino <humberto@engr.csufresno.edu>
Date: Thu, 5 Nov 1998 22:30:12 -0800 (PST)
Delivered-To: assembly-85-outgoing@towerguard.unix.edu.sollentuna.se
In-Reply-To: <19990204.214245.4711.2.justin-b@juno.com>
Reply-To: assembly-85@lists.ticalc.org


On Thu, 5 Nov 1998, Justin M Bosch wrote:
> 2) I got the link port routines, but I don't understand them at all,
> especially not the break routine.  What exactly goes into a break
> routine?  To send and receive data, do both clacs have to be running the
> routines simultaneously?  Any suggestions would be greatly appreciated.
> 
I rewrote some get/send routines a while ago, using Pascal's routines with
some help.  The way they work is: you call Get or Send, if it fails a
flag is set (I think carry), the break routine is built in.  But for a
byte to be trasfered one calc has to be calling Send, and the other has to
calling Get.
Ex:
TrySend:
  ld a,50
  call SendByte		;Try to send 50
  jr nc,ByteSent	;nc means it was sent
  call GET_KEY
  cp NO_KEY		
  jr z,TrySend		;if a key was pressed
  jp SendFailed		;Send failed
ByteSent:

This just keeps trying to send 50 until it is successfully sent or until a
key is pressed.


They're at ticalc.org
Have a look, I tested them.. they work.

-Humberto Yeverino Jr.

"I kick ass for the Lord."
-Dead Alive (1992)

***********************************************************
Home Page:                                               
  http://www.engr.csufresno.edu/~humberto/Home.html      

Ti Page:                                                 
  http://www.engr.csufresno.edu/~humberto/tex.html       

z80 Source Page:                                         
  http://www.engr.csufresno.edu/~humberto/z80source.html 

Official Tyrant Home Page:                              
  http://www.engr.csufresno.edu/~humberto/tyrant.html    

E-mail:                                                  
  humberto@engr.csufresno.edu                            
***********************************************************

References:

A85: Programming help

From: justin-b@juno.com (Justin M Bosch)