Caple C871i Manual de usuario descargar pdf (Pagina 317)

100

101

Apple II Computer Info

Note that for this to work in a IIe, the SmartWatch must be under the EF

ROM, not the CD ROM. (The program would have to be patched to refer to

D000, D001 and D004 if the SmartWatch is under the CD ROM.)

In case anyone is interested, here is a source listing of the program

(which may need a little tidying up to actually work, e.g. by removing

the spaces in the HEX line). This is for the Merlin assembler.

* SmartWatch I/O lines are as follows:

* A2 = read/-write

* A0 = data to SmartWatch

* D0 = data from SmartWatch

* The following locations trigger the desired one-bit access,

* assuming the SmartWatch is under the chip addressed when

* accessing the range E000-E00F.

* Read E000: write a zero

* Read E001: write a one

* Read E004: read (data returned in bit 0)

ORG $300

LDX #0

SEI

BIT E004

BYTELOOP: LDA DATA,X

LDY #8

BITLOOP: LSR

BCS WRITE1

BIT E000

DEY

BNE BITLOOP

BEQ NEXTBYTE

WRITE1: BIT E001

DEY

BNE BITLOOP

NEXTBYTE: INX

CPX #16

BCC BYTELOOP

CLI

RTS

ORG $330

DATA: HEX C5 3A A3 5C C5 3A A3 5C

HEX 00 00 00 00 16 01 10 99

A final point: this program can easily be modified to set the SmartWatch

to an arbitrary date and time. The last eight bytes are the time

written to the chip, which are in BCD (binary coded decimal). The

registers are in the following order:

Tenths and hundredths of seconds

Seconds

Minutes

Hours (leave the top three bits clear for 24-hour mode)

Apple II Computer Technical Information : Apple II Family Hardware Info

ftp://ground.ecn.uiowa.edu/2/apple2/miscinfo/hardware : May 2001 : 317 of 572

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Caple C871i Manual de usuario Pagina 317

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