[comp.sys.apple] Programming the GS Serial Ports

jb10320@uxa.cso.uiuc.edu (Jawaid Bazyar) (08/28/89)

   Has anyone out there in NetLand been able to successfully initialize the
GS's 8530 Serial Communications Controller directly through machine language?
Between the Zilog 8530 Technical Manual and disassemblies of ProTerm, I 
understand what needs to happen, but for some reason my code isn't working.

   I have several reasons for going straight through the hardware, the most
important being that I can access the port in 20 cycles and the ToolBox requires
something like 120 after call overhead.  So don't tell me I should use the
ToolBox, cause I don't wanna.

   Anyway, how about the person who wrote Z-Link? How did you initialize the
serial port?  What did you do for the necessary cycle delays? Or did you
go through the firmware?  At this point I would be willing to do it that way
if I had some sample code that worked.

   Any help is appreciated, as I've been pulling my hair out on this one
for longer than I care to think.

   Thanx in Advans folx-

===============================================================================
jawaid bazyar			   "The history of the world is the history of	
jb10320@uxa.cso.uiuc.edu	    the warfare between secret societies."
Junior/Computer Engineering @          - Ishmael Reed, Mumbo-Jumbo
 Univ. of Illinois
===============================================================================