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cbmeeks
Registered: Oct 2005
Posts: 72 |
Make this faster??
I'm at work doing some paper coding (using a pen and paper) and was wondering if this snippet could be made faster.
What it does is grab the left side of a 2x2 char tile and blit it on the screen.
IE:
AB
CD
This would grab "AC" because my data is laid out like: "ACBD"
LDA #1 // tile number
ROL // multiply by 4 to get the starting addr
TAX
LDA (TILES),X
STA SCREEN
INX // get the next char
LDA (TILES),X
STA SCREEN + 40
Thanks for any tips!
cbmeeks
METROID
http://www.metroidclassic.com |
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Fungus
Registered: Sep 2002
Posts: 618 |
lda tiletable,x
sta whereever
ora #$40
sta whereever
eor #$c0
sta whereever
ora #$40
sta whereever
etc...
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cbmeeks
Registered: Oct 2005
Posts: 72 |
Quote: <Post censored by CSDb staff>
lol.
Well, I'm the new kid in town so I will take Oswald's help with great appreciation. :-)
METROID
http://www.metroidclassic.com |
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JackAsser
Registered: Jun 2002
Posts: 1989 |
Quote: lol.
Well, I'm the new kid in town so I will take Oswald's help with great appreciation. :-)
METROID
http://www.metroidclassic.com
Just for the record: "Oswald is NOT crappy coder"... |
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null
Account closed
Registered: Jun 2006
Posts: 645 |
During daytime, Oswald is just a simple 6510 programmer.. but on CSDb, he transforms into...:
:_D :_D :_D
------------------------------------
Knoeki/DigitalSoundsSystem/GheyMaidInc/SwappersWithAttitude
http://hardwarehacks.untergrund.net/zomgwtfbbq/index.php |
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Richard
Registered: Dec 2001
Posts: 619 |
Lol, that picture still makes me laugh :)
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Conrad
Registered: Nov 2006
Posts: 833 |
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Richard
Registered: Dec 2001
Posts: 619 |
Nice one ;) |
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