Searching for Overlaydos.library

Joe Maroni · 25 November 2007, 14:06

i already searched where i may find it, but it seems that it doesn´t exists anymore.

or does anyone of you still have it somewhere on disk..???

BippyM · 25 November 2007, 17:24

what's it do?

Joe Maroni · 25 November 2007, 17:44

i don´t know...perhaps its switching of the DOS environment better than the standard library functions...

or it allows disable interrupts, DMA access etc...

DamienD · 25 November 2007, 17:52

Did a quick Google search it seems like might be on "The One" coverdisk 1-0193b.adz:

Downloaded this and took a look using DirOpus but couldn't see the file

Graham Humphrey · 25 November 2007, 17:54

Quote:

Originally Posted by x_to

i already searched where i may find it, but it seems that it doesn´t exists anymore.

or does anyone of you still have it somewhere on disk..???

What program needs this?

It sounds like one of those libraries that should be in the Kickstart ROM...

rgen · 25 November 2007, 18:51

Seems like this is false alarm. All what I found were Titanics Cruncher packed files which use overlays and the "Overlaydos.library" string disappears after decrunching the files. Also a reassembler break this up in a BCPL string containing 7,"Overlay" just before the "dos.library",0 string as the OpenLibrary call points only to the latter.

Joe Maroni · 25 November 2007, 19:15

i need the library for "Moon Child", which was never released.

i only see in the header of the executable that there is such a library used...

Codetapper · 25 November 2007, 20:56

As rgen says, there is no such library. The overlay text appears at the beginning of the file to indicate to dos that the file is overlaid.

Joe Maroni · 25 November 2007, 21:02

this means, that the lib is not required..?

Graham Humphrey · 25 November 2007, 21:09

Well surely if it doesn't exist then it can't possibly be required

Joe Maroni · 25 November 2007, 21:15

i´m sure that there is such a library..not just a string after decrunched files...

Quote:

....................................`..l......................[..Overlaydos.library.....Moon Child demo by Team Hoi... please wait!.............

this is an ASCII shortcut from the Moonchild Demo...it looks like the lib is mentioned in the hunks of the exe to save enough space for it later....

Graham Humphrey · 25 November 2007, 21:19

So have you actually tried running it then?

BippyM · 25 November 2007, 21:24

disassemble it or up it to the zone

thor · 25 November 2007, 21:29

BCPL string isn't 0-terminated, so "Overlay" and "dos.library" seem to you to be one string but they aren't.

Joe Maroni · 25 November 2007, 21:33

Quote:

Originally Posted by bippym

disassemble it or up it to the zone

you´ll all get the file with an aGTW update..not earlier...

sorry, but we need to keep everything exciting...

but first i need to get it running...

BippyM · 25 November 2007, 21:34

Wel okay you'd better dis-assemble it then

rgen · 25 November 2007, 21:39

up it, I'm interested in this file anyway.

x_to, this is just a strange coincidence as two concepts hit each other here. A normal string has the text and a zero at the end to terminate it, a BCPL string has its size in the first byte and then the text, without any termination. So when this two strings meet, they look like one string, but they are two. Make a hex dump and you should see a 7 before the "Overlay" text starts. Have you tried the xfd package to see that this is a Titanics Cruncher file?

25 November 2007, 14:06	#1
Joe Maroni Moderator Join Date: Feb 2003 Location: Germany Age: 44 Posts: 1,303	Searching for Overlaydos.library i already searched where i may find it, but it seems that it doesn´t exists anymore. or does anyone of you still have it somewhere on disk..???

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25 November 2007, 17:24	#2
BippyM Global Moderator Join Date: Nov 2001 Location: Derby, UK Age: 48 Posts: 9,355	what's it do?

25 November 2007, 17:44	#3
Joe Maroni Moderator Join Date: Feb 2003 Location: Germany Age: 44 Posts: 1,303	i don´t know...perhaps its switching of the DOS environment better than the standard library functions... or it allows disable interrupts, DMA access etc...

25 November 2007, 17:52	#4
DamienD Banned Join Date: Aug 2005 Location: London / Sydney Age: 47 Posts: 20,420	Did a quick Google search it seems like might be on "The One" coverdisk 1-0193b.adz: Downloaded this and took a look using DirOpus but couldn't see the file

25 November 2007, 18:51	#6
rgen Registered User Join Date: Mar 2002 Location: Aachen/Germany Age: 46 Posts: 190	Seems like this is false alarm. All what I found were Titanics Cruncher packed files which use overlays and the "Overlaydos.library" string disappears after decrunching the files. Also a reassembler break this up in a BCPL string containing 7,"Overlay" just before the "dos.library",0 string as the OpenLibrary call points only to the latter.

25 November 2007, 19:15	#7
Joe Maroni Moderator Join Date: Feb 2003 Location: Germany Age: 44 Posts: 1,303	i need the library for "Moon Child", which was never released. i only see in the header of the executable that there is such a library used...

25 November 2007, 20:56	#8
Codetapper 2 contact me: email only! Join Date: May 2001 Location: Auckland / New Zealand Posts: 3,182	As rgen says, there is no such library. The overlay text appears at the beginning of the file to indicate to dos that the file is overlaid.

25 November 2007, 21:02	#9
Joe Maroni Moderator Join Date: Feb 2003 Location: Germany Age: 44 Posts: 1,303	this means, that the lib is not required..?

25 November 2007, 21:09	#10
Graham Humphrey Moderator Join Date: Jul 2004 Location: Norwich, Norfolk, UK Age: 37 Posts: 11,167	Well surely if it doesn't exist then it can't possibly be required

25 November 2007, 21:19	#12
Graham Humphrey Moderator Join Date: Jul 2004 Location: Norwich, Norfolk, UK Age: 37 Posts: 11,167	So have you actually tried running it then?

25 November 2007, 21:24	#13
BippyM Global Moderator Join Date: Nov 2001 Location: Derby, UK Age: 48 Posts: 9,355	disassemble it or up it to the zone

25 November 2007, 21:29	#14
thor Registered User Join Date: Mar 2006 Location: Germany Posts: 899	BCPL string isn't 0-terminated, so "Overlay" and "dos.library" seem to you to be one string but they aren't.

25 November 2007, 21:34	#16
BippyM Global Moderator Join Date: Nov 2001 Location: Derby, UK Age: 48 Posts: 9,355	Wel okay you'd better dis-assemble it then

25 November 2007, 21:39	#17
rgen Registered User Join Date: Mar 2002 Location: Aachen/Germany Age: 46 Posts: 190	up it, I'm interested in this file anyway. x_to, this is just a strange coincidence as two concepts hit each other here. A normal string has the text and a zero at the end to terminate it, a BCPL string has its size in the first byte and then the text, without any termination. So when this two strings meet, they look like one string, but they are two. Make a hex dump and you should see a 7 before the "Overlay" text starts. Have you tried the xfd package to see that this is a Titanics Cruncher file?

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