grey screen with no music by Genesis Project

grey screen with no music by Genesis Project [web]

screenshot added by wertstahl on 2018-08-31 21:51:41

platform :	Commodore 64 Commodore 64
type :	32b 32b
release date :	august 2018

popularity : 52%

52%

-0.09

alltime top: #73183

wertstahl [Code]

added on the 2018-08-31 21:51:41 by wertstahl

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scnr

added on the 2018-08-31 21:51:55 by wertstahl

loonies did this hours ago!!! although their implementation was in BASIC, so i guess this is a worthy release.
still, it's not full hd!!!

sucks added on the 2018-08-31 21:55:32 by psenough

8 bytes on a non-DOS platform. respect.

rulez added on the 2018-08-31 21:56:06 by HellMood

psenough: fyi the loonies version is 29 bytes. and mine has a valid screenshot ;-)

added on the 2018-08-31 22:00:17 by wertstahl

a bit bright on the grey side, but the soundtrack works really well with this palette

rulez added on the 2018-08-31 22:37:47 by jco

GLÖP!

sucks added on the 2018-09-01 02:19:24 by ɧ4ɾɗվ.

glop

rulez added on the 2018-09-01 10:45:22 by skarab

Quote:

8 bytes on a non-DOS platform. respect.

Not as big a feat when you consider that the file header is left out of this number. The file is 10 bytes. And in this particular case, those extra two bytes (the load address) are essential to make the code work, as they make sure it is injected into the CHRGET routine.

Anyway, some improvements are possible:

1. Replace

Code:INC $D020

Code:LSR $D020

to make the code work even when executed multiple times. This fixes the "bug" that it currently has where pressing RETURN will change the screen color away from grey.

2. Replace

Code:

LDA #0
STA $D011

Code:LSR $D011

which just as effectively clears the DEN bit, blanking the screen, to save two bytes.

3. Inject at address $84. Then the final byte, at address $89, will already have the value $D0 as needed, so it can be left out.

All in out, we can get down to 5 bytes payload, for a 7 bytes file size. :)

added on the 2018-09-01 16:49:03 by Blueberry

even more awesome. i know nothing about c64 really, so i have respect if somebody reaches sizes like me for msdos ( because nornally nobody does ^^ so I figured stuff is harder on c64)

i'm still waiting for an experienced c64 sizecoder to port “dragon fade“ (for example), because the underlying technique is platform independent, but I don't know how to port it ^^

smallest is 16 bytes so far, so 32bytes on c64 should be possible? =)

added on the 2018-09-01 17:36:22 by HellMood

What do you mean "smallest is 16 bytes so far"? This prod is 10 bytes, and I just described how to reduce it to 7. :)

added on the 2018-09-01 19:50:46 by Blueberry

“dragon fade“ is 32 bytes, in “leaf“ (.pack) there is a 16 byte version

Dragon Fade
Leaf Pack

I'm sure it's possible in 32b on c64, i just don't know how to do it ;) Just mentioning it, since you reach about equal size regarding another problem =)

added on the 2018-09-01 19:59:51 by HellMood

Ah, you were talking about the other intros. Got it. Hmm, I'll have to think about that one. ;)

added on the 2018-09-01 20:08:18 by Blueberry

glöp

sucks added on the 2018-09-01 23:33:46 by xTr1m

I prefer the party version! But what the heck -> take my thumb ;-)

rulez added on the 2018-09-01 23:34:01 by RufUsul

glöp

sucks added on the 2018-09-01 23:53:53 by neoman

actually, krill of plush, the speedloader overlord made all this obsolete, my pants and jaw are down: it is doable in 2+4 bytes.

https://csdb.dk/release/?id=167752

i bow.

added on the 2018-09-13 01:57:31 by wertstahl

-1

sucks added on the 2019-05-25 20:30:48 by pchelka777