Originally posted by: ee173xed@sdcc3.UUCP ({|stu)
Message-ID: <2446@sdcc3.UUCP>
Date: Tue, 6-Nov-84 12:26:35 EST
Article-I.D.: sdcc3.2446
Posted: Tue Nov 6 12:26:35 1984
Date-Received: Thu, 8-Nov-84 09:34:08 EST
Distribution: na
Organization: U.C. San Diego, Academic Computer Center
Lines: 34
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Have you ever wondered why most commercial game programs use game
port 2 for the joystick instead of game port 1? Here is a
simplified answer.
The keyboard and the two joystick ports are connected to the same
6526 Complex Interface Adapter. To make a long story short,
port 1 joystick left triggers the keyboard interrupt,
unnecessarily using up CPU cycles.
In fact, some characters can be printed to the screen using the port
1 joystick. To avoid this, use port 2 or disable keyboard interrupts
using poke 649,0.
Does anyone out there in net-land have a C compiler for the C-64?
Here is a goody that will keep your disk drive happier:
open 15,8,15:print#15,"m-w";chr$(106)chr$(0)chr$(1)chr$(133):close15
This short piece of reprogramming for the drive controller is
supposed to eliminate the drive chatter caused by protected
commercial programs.
Bob Lee
sdcarl!jrl
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Bob Lee
sdcarl!jrl
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