mirror of https://github.com/A2osX/A2osX.git
126 lines
3.3 KiB
Plaintext
126 lines
3.3 KiB
Plaintext
NEW
|
||
AUTO 3,1
|
||
*--------------------------------------
|
||
* Thunderclock driver
|
||
* hard coded for slot 1
|
||
*--------------------------------------
|
||
clkmode .EQ $0538 clock mode
|
||
rdtcp .EQ $C108 Thunderclock read entry
|
||
wttcp .EQ $C10B Thunderclock write entry
|
||
*--------------------------------------
|
||
TCLK.START .PH CLK
|
||
|
||
ldx TCLK.Cx2+2 clock slot = $C1.
|
||
|
||
lda clkmode,x save current mode
|
||
pha
|
||
lda #$A3 send numeric mode byte to Thunderclock
|
||
|
||
TCLK.Cx1 jsr wttcp
|
||
|
||
TCLK.Cx2 jsr rdtcp read month, day of week, day of month
|
||
|
||
clc and time into input buffer.
|
||
ldx #$04 index for 5 values.
|
||
ldy #$0C read minutes 1st, month last.
|
||
|
||
.1 lda ROM.INBUF,y convert values to binary.
|
||
and #$07 no value > 5 decimal.
|
||
sta ZP.PCL 'tens' place value
|
||
asl multiply by 10
|
||
asl
|
||
adc ZP.PCL
|
||
asl
|
||
adc ROM.INBUF+1,y add to ascii 'ones' place
|
||
sec and subtract out the ascii
|
||
sbc #$B0
|
||
sta ZP.PCL,x save converted value.
|
||
dey index to next lowest value
|
||
dey
|
||
dey
|
||
dex are there more values?
|
||
bpl .1 if yes.
|
||
|
||
tay contains month
|
||
lsr
|
||
ror
|
||
ror
|
||
ror high bit of month held in carry
|
||
ora ZP.A1L
|
||
sta GP.DATE save low value of date.
|
||
php save high bit of month.
|
||
and #$1F isolate day.
|
||
adc tdays-1,y (y = month)
|
||
bcc .2 branch if not Sept 13 thru 30th
|
||
|
||
adc #$03 adj for mod 7 when day > 256
|
||
|
||
.2 sec
|
||
|
||
.3 sbc #$07
|
||
bcs .3 loop until < 0.
|
||
|
||
adc #$07 make it in the range of 0-6.
|
||
sbc ZP.PCH the delta provides years offset.
|
||
bcs .4 branch if positive
|
||
|
||
adc #$07 else make it positive again.
|
||
|
||
.4 tay
|
||
lda yradj,y look up year
|
||
plp and combine it with hi bit of month
|
||
rol
|
||
sta GP.DATE+1 P8 date
|
||
|
||
lda ZP.A1L+1 hour
|
||
sta GP.TIME+1 P8 time
|
||
lda ZP.A2L minute
|
||
sta GP.TIME
|
||
|
||
pla restore previous mode.
|
||
ldx TCLK.Cx2+2 clock slot = $C1
|
||
sta clkmode,x
|
||
rts
|
||
|
||
* this table contains entries for the cumulative # of days in a year,
|
||
* one entry for each month. the values are modulo 256.
|
||
|
||
tdays .DA #$00 January
|
||
.DA #$1F February
|
||
.DA #$3B March
|
||
.DA #$5A April
|
||
.DA #$78 May
|
||
.DA #$97 June
|
||
.DA #$B5 July
|
||
.DA #$D3 August
|
||
.DA #$F2 September
|
||
.DA #$14 October (MOD 256)
|
||
.DA #$33 November
|
||
.DA #$51 December
|
||
|
||
* the following table is used to look up the current year, based on
|
||
* the current month, day and day of week. The 1st entry corresponds
|
||
* to the year in which January 1st falls on a Monday. The 2nd entry
|
||
* is the year which January 1st is Sunday, and so on backwards thru
|
||
* the days of the week.
|
||
* https://calormen.com/tmp/proyear.html
|
||
* For 2022 - 2027: $18, $17, $16, $1B, $1A, $19, $18
|
||
yradj .DA #$18 Monday
|
||
.DA #$17 Sunday
|
||
.DA #$16 Saturday
|
||
.DA #$1B Friday
|
||
.DA #$1A Thursday
|
||
.DA #$19 Wednesday
|
||
.DA #$18 Tuesday
|
||
*--------------------------------------
|
||
.EP
|
||
*--------------------------------------
|
||
* .LIST ON
|
||
TCLK.LEN .EQ *-TCLK.START
|
||
.LIST OFF
|
||
*--------------------------------------
|
||
MAN
|
||
SAVE usr/src/prodos.fx/prodos.s.tclk
|
||
LOAD usr/src/prodos.fx/prodos.s
|
||
ASM
|