Re: A83: Re: Newbies :)
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Re: A83: Re: Newbies :)
There are many ways to get the calculator off. Also, CalcOff has been
out since before James's tutorials
<<<<<<<<<<<<<<<<<<<<<<<<<+>>>>>>>>>>>>>>>>>>>>>>>>>
See ya,
Mastermind
http://www.bigfoot.com/~mastermind5
On Sat, 05 Dec 1998 19:42:55 PST "Evil Sam" <evil_sam@hotmail.com>
writes:
>
>>Here's the bit of code from Joe's PW program that turns the calc
>off...
>Do
>>with it what you will, and direct questions to him... =P
>> --Jason
>K.
>> di ; turn off interrupts
>> ld a, $01 ;\
>> out (3), a ; \ Tell the calculator to
>shut down
>> xor a ; / at getkey
>> out (4), a ;/
>> ei ; turn the interrupts back
>on
>> res 4, (iy+9) ; get rid of the "on" flag to
>prevent errors
>> call getkey ; shut down the calculator and
>wait for [ON]
>>
>> ; Note By Me: His "getkey" is the equivalent of "_getkey".
>
> "xor a / out (4),a" will screw up the calc's interrupt speed. The
>correct shutdown code is this(taken from Penguins 82/83, Bill Nagel
>can't be wrong :). The getkey part is unnecessary. If the ON flag is
>cleared, then it will wait for the ON flag to occur :)
>
>OFF:
> RES 4, (IY $09) ; Turn off 'ON' flag
> DI ; disable interrupts
> LD A, 01 ; bit 3 = lcd status
> OUT ($03), A ; bit 0 = ON-interrupt status
> XOR A ; make interrupts go fast
> OUT ($04), A
> EI ; enable interrupts
> HALT ; wait for ON (that's the only interrupt)
> DI
> LD A, $16 ; Default setting for interrupt speed
> OUT ($04), A
> ret
>
>
>
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