| Wake Up! 16b by Desire [web] | ||||||||||||||
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popularity : 56% |
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alltime top: #55223 |
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added on the 2026-05-17 02:36:13 by HellMood  |
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comments
There is no spoon.
rulez added on the 2026-05-17 08:15:31 by Depeche 
How?!
Oh wow that is amazing
Yes, that's what I meant when we talked about demos that don't look like their technically limited by their size.
Great work, eager to see the writeup
Great work, eager to see the writeup
🤯
Sick
wow
Code:
int 10h ; set gfx mode 0 (40x25)
mov bh,0xb8 ; set bx start of video ram
mov ds,bx ; set data segment to video ram
L: lodsb ; load a byte from ds:si (initially 0x100)
sub si,byte 57 ; si == 199. 57 == 3*19
xor [si],al ; mangle some screen/audio data...
out 61h,al ; PPI port B: do speaker stuff
jmp short L ; do whatever the fsck you just did againI see green on the screen, so there must be 0x02 at those places in vram. And 0x02 on port 61h is also the speaker on/off (link).
It's just white when I run dosbox without a special config, and HellMoods config has graphics as cga_mono and
Quote:
monochrome_pal = green
That's how the green gets into it.
So... it jumps around in the vram area, xoring 0x02 into random bytes. 57 and 65536 are coprime, so we have a long period until everything wraps around. Why it does the sound that it does - I don't know yet
It's 56 ;) (lodsb increments si)
The green comes from simulating an old monochrome CGA monitor
it does not actually set something to green (0x02)
Please have a little patience for the write up =)
The green comes from simulating an old monochrome CGA monitor
it does not actually set something to green (0x02)
Please have a little patience for the write up =)
ouch!
Especially the sound turns out really nice, like a reverb!
great
The audio creates a perfect vibe that matches the visuals. Mind blowing 16 bytes 🤯
what
Here is the Write Up =)
Super nice sound! Thx for the write up.
Normally I spend much more bytes on much worse sound. Impressive achievment. :-D
Impressive! Congratulations
Hahaha! ;)
Quote:
Normally I spend much more bytes on much worse sound. Impressive achievment. :-D
Hahaha! ;)
<3
So cool
Wow!
what the fuck
Absolutely brilliant!
This is demoscene
Klein aber oho!
cool
Experimental audio from very short assembler programs. And when I say very, I mean very!
awesome!
🤯
Knock, knock, Neo
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