(at the computer)
24 PIN MALE EDGE (DZM 12 DREH) at the computer.
|2||+5V||+5 VDC (100 mA max)|
|3||/RESET||Reset, will force a Cold Start. Also a reset output for devices.|
|4||JOY0||This pin is connected to joystick switch 0 (See game port).|
|5||JOY1||This pin is connected to joystick switch 1 (See game port).|
|6||JOY2||This pin is connected to joystick switch 2 (See game port).|
|7||LIGHT PEN||This pin also acts ad the input for the joystick fire button (See game port).|
|8||CASSETTE SWITCH||This pin is connected to the sense cassette switch line.|
|9||ATN||Serial Attention In|
|10||+9V AC||+9 VAC (+ phase)|
|11||+9V AC||+9 VAC (- phase)|
Note: 0.156" (3.96mm) contact spacing.
The VIC gives you complete control over Port B on VIA chip #1. Eight lines for input or output are available, as well as 2 lines for handshaking with an outside device. The I/O lines for Port B are controlled by two locations. One is the port itself, and is located at 37136 ($9110 hex). Naturally you PEEK it to read an input, or POKE it to set an output. Each of the eight I/O lines can be set up as either an input or an output by setting the data direction register properly. It is located at 37138 ($9112 hex).
|Contributor:||Joakim Ögren, Nikolas Engström, Arwin Vosselman, Jestin Nesselroad, Larry Anderson|
|Source:||Commodore VIC-20 User Manual|
|Commodore VIC-20 Programmer's Reference Guide|
|NT Rautanen Tietokonesivut: Commodore|
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May be copied and redistributed, partially or in whole, as appropriate.
Document last modified: 2002-01-13