Difference between revisions of "Programming the Microprocessor"
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Select '''File''' again and then '''Save AS''' [enter a file name for your program] | Select '''File''' again and then '''Save AS''' [enter a file name for your program] | ||
Make sure it has the yourfilename.'''asm''' extension click '''Save'''. | Make sure it has the yourfilename.'''asm''' extension click '''Save'''. | ||
| − | + | Cut and paste the example code below into Notepad++ | |
| − | + | '''Example code:''' | |
STX #$6ffc ; capture x reg | STX #$6ffc ; capture x reg | ||
LDX #$55 ; set counter to binary 10101010 | LDX #$55 ; set counter to binary 10101010 | ||
Revision as of 22:29, 26 September 2020
Use Notepad++ to write your source code.
Download and Install Notepad++ from https://notepad-plus-plus.org/ Open Notepad++ and select File and then select New. (Opens a new window) Select Language and then select the Letter A then select Assembly. Select File again and then Save AS [enter a file name for your program] Make sure it has the yourfilename.asm extension click Save. Cut and paste the example code below into Notepad++
Example code:
STX #$6ffc ; capture x reg
LDX #$55 ; set counter to binary 10101010
count EQU *
LDA #$0f ; Turn on half of the LED's 00001111
STA $6000 ; Write value to VIA chip
DEX ; Decrease the X register by 1
LDA #$f0 ; Turn on half of the LED's 11110000
BNE count
LDX $6ffc ; Restore X reg to orginal value
LDA #$00 ; turn off all LED's 00000000
STA $6000 ; Write value to VIA chip
