Difference between revisions of "M8trix 8b"
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| + | [[Category:Case Study]] | ||
{{Tinyprog|title=m8trix 8b|author=Hellmood|bsize=8|link=http://www.pouet.net/prod.php?which=63126}} | {{Tinyprog|title=m8trix 8b|author=Hellmood|bsize=8|link=http://www.pouet.net/prod.php?which=63126}} | ||
| + | Actually, it has been optimized to 7 bytes (!), but let's start with the original. m8trix 8b started out as these 8 bytes: | ||
| + | |||
| + | <syntaxhighlight lang="nasm"> | ||
| + | org 100h | ||
| + | |||
| + | S: | ||
| + | les bx,[si] ; sets ES to the screen, assume si = 0x100 | ||
| + | ; 0x101 is SBB AL,9F and changes the char | ||
| + | ; without CR flag, there would be | ||
| + | ; no animation ;) | ||
| + | lahf ; gets 0x02 (green) in the first run | ||
| + | ; afterwards, it is not called again | ||
| + | ; because of alignment ;) | ||
| + | stosw ; print the green char ... | ||
| + | ; (is also 0xAB9F and works as segment) | ||
| + | inc di ; and skip one row | ||
| + | inc di ; | ||
| + | jmp short S+1 ; repeat on 0x101 | ||
| + | </syntaxhighlight> | ||
| + | |||
| + | (This case study is unfinished) | ||
Latest revision as of 10:42, 20 August 2016
m8trix 8b was created by Hellmood and is 8 bytes in size. Actually, it has been optimized to 7 bytes (!), but let's start with the original. m8trix 8b started out as these 8 bytes:
org 100h
S:
les bx,[si] ; sets ES to the screen, assume si = 0x100
; 0x101 is SBB AL,9F and changes the char
; without CR flag, there would be
; no animation ;)
lahf ; gets 0x02 (green) in the first run
; afterwards, it is not called again
; because of alignment ;)
stosw ; print the green char ...
; (is also 0xAB9F and works as segment)
inc di ; and skip one row
inc di ;
jmp short S+1 ; repeat on 0x101
(This case study is unfinished)
