8-Bit Show And Tell | Using Commodore 64 BASIC SYS Parameters in Machine Language @8_Bit | Uploaded July 2021 | Updated October 2024, 3 hours ago.
Today we're coding an example of how to extend Commodore 64 BASIC SYS commands with parameters that can be used in your machine language program. Instead of just SYS 49152 you can do SYS 49152,X,Y,40*25 or whatever you'd like in your C64 BASIC programs.

Download today's code: 8bitshowandtell.com/prg/sysparam.d64

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How to use:
LOAD"TMP",8,1
SYS 32768
Back Arrow, L then filename: ML11
Back Arrow, 3 to assemble, any key to editor
Back Arrow, 1 to exit to BASIC

BASIC Use Example 1:
SYS 828,1064,400,1

BASIC Use Example 2:
10 FOR X=1 TO 1000
20 SYS 828,1024,X,X
30 NEXT

Intro and end credits music by bedfordlevelexperiment.bandcamp.com

Index:
0:00 Intro
1:00 Loading and assembling with Turbo Macro Pro
2:17 An example
5:06 Walk through the code
8:55 Reading the parameters
10:35 Using the parameters example: memory fill routine
15:50 Using the example in a short BASIC program
19:22 Thanks to my patrons