2019-11-04 07:21:40 +00:00
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NEW
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AUTO 3,1
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*--------------------------------------
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* Driver For DS1216E
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*--------------------------------------
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2021-05-30 20:34:03 +00:00
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* we can safely use $200 (used by TCLK)
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*--------------------------------------
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DS1216E.DATA .EQ $200 Reverted YY MM DD Day HH mm SS CS
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*--------------------------------------
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2021-06-06 19:06:49 +00:00
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NCLK.START lda RDCXROM
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php
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2021-05-30 20:34:03 +00:00
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sei NO IRQ !!!
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2021-06-06 19:06:49 +00:00
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sta SETCXROM
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2021-05-30 20:34:03 +00:00
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2019-11-04 07:21:40 +00:00
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sta $C300
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2021-06-06 19:06:49 +00:00
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lda $C00B Workaround for Ultrawarp bug
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2019-11-04 07:21:40 +00:00
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lda $C304 Reset DS1216E comparison register with READ A2=1
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2021-05-30 20:34:03 +00:00
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ldx #8 Read 8 bytes...
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2019-11-04 07:21:40 +00:00
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2021-05-30 20:34:03 +00:00
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.1 ldy #8 ....of 8 bits
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2019-11-04 07:21:40 +00:00
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2021-05-30 20:34:03 +00:00
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lda DS1216E.PATTERN-1,x
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.2 lsr
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bcs .3
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bit $C300
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bra .30
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.3 bit $C301 Write Pattern bit in A0, with A2=0
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.30 dey
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2019-11-04 07:21:40 +00:00
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bne .2
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2021-05-30 20:34:03 +00:00
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dex
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bne .1
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2019-11-04 07:21:40 +00:00
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2021-05-30 20:34:03 +00:00
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ldx #8
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2019-11-04 07:21:40 +00:00
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.4 ldy #8
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2021-05-30 20:34:03 +00:00
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.5 pha
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lda $C304 Read Byte...
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2019-11-04 07:21:40 +00:00
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lsr
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2021-05-30 20:34:03 +00:00
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pla
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ror
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2019-11-04 07:21:40 +00:00
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dey
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bne .5
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pha
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lsr
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lsr
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lsr
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lsr
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tay
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pla
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and #$0F
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clc
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.HS 2C Bit Absolute to skip adc #$0A
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.6 adc #$0A
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dey
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2021-05-30 20:34:03 +00:00
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bpl .6
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2019-11-04 07:21:40 +00:00
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2021-05-30 20:34:03 +00:00
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sta DS1216E.DATA-1,x
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2019-11-04 07:21:40 +00:00
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dex
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2021-05-30 20:34:03 +00:00
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bne .4
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pha DS1216E.DATA
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2019-11-04 07:21:40 +00:00
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lda DS1216E.DATA+1 Get MM
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asl
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asl
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asl
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asl
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asl
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ora DS1216E.DATA+2 Get DD
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sta DATELO
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2021-05-30 20:34:03 +00:00
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* lda DS1216E.DATA Get YY
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pla
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rol
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sta DATELO+1
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lda DS1216E.DATA+5 Get mm
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sta TIMELO
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lda DS1216E.DATA+4 Get HH
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sta TIMELO+1
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2019-11-04 07:21:40 +00:00
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plp
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2021-06-03 17:43:28 +00:00
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bmi .8
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2021-05-30 20:34:03 +00:00
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2021-06-03 17:43:28 +00:00
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sta CLRCXROM
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2021-05-30 20:34:03 +00:00
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2021-06-06 19:06:49 +00:00
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.8 rts
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2019-11-04 07:21:40 +00:00
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*--------------------------------------
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DS1216E.PATTERN .HS 5CA33AC55CA33AC5 Reverted 7->0
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*--------------------------------------
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2021-05-30 20:34:03 +00:00
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.LIST ON
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2019-11-04 07:21:40 +00:00
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NCLK.LEN .EQ *-NCLK.START
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2021-05-30 20:34:03 +00:00
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.LIST OFF
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*--------------------------------------
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* CONTROL SECTION :
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*--------------------------------------
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.DO NCLK.LEN>125
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ERROR:NCLK Driver too big
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.FIN
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2019-11-04 07:21:40 +00:00
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*--------------------------------------
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MAN
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2020-08-30 17:50:57 +00:00
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SAVE usr/src/prodos.fx/prodos.s.nclk
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LOAD usr/src/prodos.fx/prodos.s
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2019-11-04 07:21:40 +00:00
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ASM
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