[A83] Re: Official H**s Replacement Commands (OT)
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[A83] Re: Official H**s Replacement Commands (OT)
I think we have a winner! Check this source code out! Unfortunately, I think
he actually meant this to be a real program...
http://www.shiar.org/ticalcs/archives.php?download=tictacto
-----Original Message-----
From: assembly-83-bounce@lists.ticalc.org
[mailto:assembly-83-bounce@lists.ticalc.org]On Behalf Of Thomas J.
Hruska
Sent: Thursday, July 05, 2001 10:30 AM
To: assembly-83@lists.ticalc.org
Subject: [A83] Re: Official H**s Replacement Commands (OT)
At 07:17 PM 7/4/01 +0200, you wrote:
Actually, there would be an excellent idea: Modify the previously
mentioned code to crash the calculator at random times (say 1% of the
time...so you only have to look at 50 screen updates on average).
>Can you also get *more* than the official labelling (with zero
termination)?
>It would be very, very, very nasty to load a large piece of the vat, and
>cleared the whole lot.
>
>>To clarify a bit, what he's saying is that >> 8 and & 255 are used to get
>the 8-bit pieces of a 16-bit address. For example, when you do:
>> ld hl,plotsscreen
>>What you're doing is equivalent to
>> ld h,plotsscreen >> 8 ;upper byte
>> ld l,plotsscreen & 255 ;lower byte
>>
>>Thus you can use >> 8 and & 255 to just get one piece of the address if
you
>don't want to do an entire 16-bit load.
>>
>>
>>In a message dated Tue, 3 Jul 2001 3:35:01 PM Eastern Daylight Time,
"Kirk
>Meyer" <kirk.meyer@colorado.edu> writes:
>>
>><<
>>>> 8 shifts right 8 (get upper byte)
>>& 255 ands with 255 (get lower byte)
>>
>>In this code it's obviously a joke, but >> 8 is often used for optimizing
>>tables by splitting them across 256 bytes.
Thomas J. Hruska -- shinelight@crosswinds.net
Shining Light Productions -- "Meeting the needs of fellow programmers"
http://www.shininglightpro.com/
References: