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maydinbil
 Post subject: square frequency
PostPosted: Wed Dec 29, 2004 1:46 pm 
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Joined: Mon Dec 27, 2004 12:23 pm
Posts: 1
hi,
I want to square wave with 6502 assembly which is my frequnecy . I write only 50hz frequncy square vaew output how can I do it ?

.ORG $0200
LDA #$00
STA $0401
LDA #$0F
STA $0400
LDA #$04
STA $0401
AGAIN: LDA #$01
STA $0400
JSR WAIT
JSR WAIT
LDA #$00
STA $0400
JSR WAIT
JSR WAIT
JMP AGAIN
BRK
BRK
.ORG $022A
WAIT LDY #$20
LDX #$1D
A1: DEX
BNE A1
A2: DEY
BNE A2
RTS
BRK

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GARTHWILSON
 Post subject:
PostPosted: Wed Dec 29, 2004 11:21 pm 
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Joined: Fri Aug 30, 2002 1:09 am
Posts: 8541
Location: Southern California
I'm sure we can give you a more efficient way. What kind of hardware are you running it on? What I/O IC is at address 400?
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