added a stupid amount of work to zpy, and started the document work in latex

rather than groff

1 files changed, 27 insertions, 0 deletions

diff --git a/electronics/asm/mem.asm b/electronics/asm/mem.asm
new file mode 100644
index 0000000..0c2d595
--- /dev/null
+++ b/electronics/asm/mem.asm
@@ -0,0 +1,27 @@
+start: 
+init: 
+	clrf    PORTA           ; make sure port A output latches are low 
+	clrf    PORTB           ; make sure port B output latches are low 
+	bsf     STATUS,RP0      ; select memory bank 1 
+	movlw 	b'11111111'     ; set port A data direction to inputs 
+	movwf 	TRISA         
+	movlw 	b'00000000'     ; set port B data direction to outputs 
+	movwf 	TRISB          
+	bcf     STATUS,RP0      ; select memory bank 0 
+	goto    main 
+;; for this program use the 2k 8 bit mem chip, with WE on B2, OE on B3, and the memorys 3 least
+;; sig bits to B4-B6 (inclusive), all other pins on the mem chip need to be held low, and an led 
+;; needs to be on B1
+;; when B1 goes high move the 3 pins from the microcontroler to leds and see the value
+main: 
+	movlw	b'01111000' 
+	movwf	PORTB		; make we high, oe low, and 3 pins high
+	call	wait1000ms
+
+	movlw	b'00000110' 
+	movwf	PORTB		; make we low, oe high, and 3 pins low 
+
+noend:
+	goto 	noend
+
+	END		        ; ends the program