Lemmings CD32

Retro1234 · 17 September 2009, 08:47

Can someone confirm Lemmings CD32/CDTV can be palyed on a Real CD32 using the controll pad aswell as the mouse?
Thanks

mk1 · 17 September 2009, 11:48

Yes it can.

Retro1234 · 17 September 2009, 12:03

Quote:

Originally Posted by mk1

Yes it can.

Thankyou for your answer

Now does anyone know why I cant recreat this on my A1200

-
Missing Device, library or something to do with the actual make up of the Disc/CD?
:The CDTV prefs file?

Retro1234 · 22 September 2009, 12:19

Bump* Anyone can shed some light on this

Ive got
Devs - Bookmark.device
cdtv.Device
Libs -Playerprefs.library
I still cant recreate runing Lemmings and being able to use the JoyPad - Any Ideas?

mk1 · 05 October 2009, 10:26

I would try running the game with a CD32 emulator and see if it works..

Retro1234 · 05 October 2009, 12:57

Quote:

Originally Posted by mk1

I would try running the game with a CD32 emulator and see if it works..

Ive tried many different combinations most of the emulatrs for the amiga try to simulate the cd.device but having the cd.device makes no difference - Guess im just lazzy and want to play with a JoyPad.

earok · 16 August 2014, 04:59

I'm totally confused by this myself - I can play the original Lemmings CDTV ISO and it works just fine with joypad, but if I extract the ISO contents into a folder, make it back into a bootable disc with ISOCD (using the same trademark file that's present on the root of the Lemmings CDTV ISO), joypad doesn't work.

What's more is the new ISO is approximately half the size of the previous one (~27mb vs ~57mb), so presumably there's some stuff needed for the joypad to work that's embedded in the ISO but not in the ISO's file system. I've tried adding a bunch of stuff that may be related (playerprefs.lib etc) but to no avail.

(The reason I'm bringing this up is I was looking at doing an unofficial Lemmings CD32 compilation with the other games and was hoping to at least get the original playable on a joypad, like it is on the CDTV release)

Retro1234 · 07 September 2014, 12:38

Quote:

Originally Posted by earok

I'm totally confused by this myself - I can play the original Lemmings CDTV ISO and it works just fine with joypad, but if I extract the ISO contents into a folder, make it back into a bootable disc with ISOCD (using the same trademark file that's present on the root of the Lemmings CDTV ISO), joypad doesn't work.

What's more is the new ISO is approximately half the size of the previous one (~27mb vs ~57mb), so presumably there's some stuff needed for the joypad to work that's embedded in the ISO but not in the ISO's file system. I've tried adding a bunch of stuff that may be related (playerprefs.lib etc) but to no avail.

(The reason I'm bringing this up is I was looking at doing an unofficial Lemmings CD32 compilation with the other games and was hoping to at least get the original playable on a joypad, like it is on the CDTV release)

Just seen this after your new Lemmings collection - Yes I would be very interested in what the reason is.

13 October 2014, 19:17

Is Lemmings CD32 anyhow better then old Lemmings OCS?(AGA gfx, more music, levels ...). Sadly most of CD32 titles were just straight AGA, or OCS/ECS CD format publishing ...

Amigajay · 13 October 2014, 20:47

No its the same as the OCS release bar its missing the two player mode, well technically its still on the disc but they replaced the 2 player button for a quit one so you cant access the mode.

earok · 30 October 2014, 11:24

I thought I'd have another crack at working out how to get the joypad to work outside of the CDTV ISO. I had a look at it in the WinUAE debugger and put a memory breakpoint on "DFF00C" (which is the hardware register for Port 2, ergo when it gets accessed it's reading the Joystick state). It broke at this line:

1 00E69B2C 3228 000c MOVE.W (A0, $000c) == $00dff00c,D1

Address "00E69B2C" is outside of the game code itself and is in the CD32 ROM. I'm not exactly sure how the program gets to there as there and I think when that location is accessed it's running in a separate thread to the game itself (when I break in the main game code and step through, it never seems to get back there).

Someone a lot smarter than me can probably figure it out.

Retro1234 · 30 October 2014, 19:28

Again over my head but very intresting - I think I read that Playerprefs.library from the CDTV and CD32 extended roms has some kind of Joypad emulation option but what the answear is I dont know - Because like you say "if I extract the ISO contents into a folder, make it back into a bootable disc with ISOCD- joypad doesn't work"

but yes very intrested hope to see a answer some day
- also been following a few of your other ideas with interest Pc-Task and NVRAM

FOL · 31 October 2014, 00:57

Quote:

Originally Posted by Boo Boo

Again over my head but very intresting - I think I read that Playerprefs.library from the CDTV and CD32 extended roms has some kind of Joypad emulation option but what the answear is I dont know - Because like you say "if I extract the ISO contents into a folder, make it back into a bootable disc with ISOCD- joypad doesn't work"

but yes very intrested hope to see a answer some day
- also been following a few of your other ideas with interest Pc-Task and NVRAM

Isnt there something embedded into the disc?
As its something like 50 odd megs, then you extract it, its around 20 megs.

earok · 31 October 2014, 03:47

@FOL Yeah, it does seem to be something special about the ISO that makes the game run in joypad mode. I presume it's something to the effect of setting a certain memory address to a certain value, so when the game runs (and detects that value) it activates the mouse emulation code / library (playerprefs?).

@BooBoo Cheers, I haven't done any more on PC-Task lately (other than Alley Cat there's probably very few decent PC games that could run at an OK speed on a stock CD32), but myself and some others are doing some interesting things with NVRAM saving

stay tuned.

Psygore · 24 January 2015, 13:44

To have the controll pad mode on CD32 with Lemmings CD, set the volume ID as "LEMMINGS_PLANETSIDE" without the quotes and fill the name with space when creating the iso. You may have issues with games in 2-player mode. Of course, it will not work with the whdload version.

Retro1234 · 24 January 2015, 20:24

Thank you for the info - interesting, would it work from HD - I will have a play

earok · 25 January 2015, 00:12

Ah, dang - I actually am using the WHDLoad version on my latest version of the unofficial CD32 ports release (for two player mode and also to select any level without using the password screen) but maybe I could include both for people that don't have a mouse.

Thanks for solving the mystery!

Psygore · 26 January 2015, 19:22

The patch is included in the CD32 rom 3.1. When the CD32 is booting, it reads the CD through the cd.device and compares the volume id and applies different patches.
There are about 20 titles (Sim City, Bat, Team Yankee,...) which are patched (allocate public memory instead of chip, disable cpu caches, joymouse,...).

Retro1234 · 06 February 2015, 12:13

I still cant create a duplicate ISO that allows me to play with the joypad - what am I doing wrong?
Ive upload LEM_TEST.iso to the Zone

Psygore · 08 February 2015, 11:35

Quote:

Originally Posted by Boo Boo

I still cant create a duplicate ISO that allows me to play with the joypad - what am I doing wrong?
Ive upload LEM_TEST.iso to the Zone

Volume ID must be completed with maximum space after LEMMINGS_PLANETSIDE name.

17 September 2009, 08:47	#1
Retro1234 Phone Homer Join Date: Jun 2006 Location: 5150 Posts: 5,773	Lemmings CD32 Can someone confirm Lemmings CD32/CDTV can be palyed on a Real CD32 using the controll pad aswell as the mouse? Thanks

06 February 2015, 12:13	#19
Retro1234 Phone Homer Join Date: Jun 2006 Location: 5150 Posts: 5,773	I still cant create a duplicate ISO that allows me to play with the joypad - what am I doing wrong? Ive upload LEM_TEST.iso to the Zone Attached Thumbnails

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17 September 2009, 11:48	#2
mk1 Registered User Join Date: Jul 2006 Location: Helsinki / Finland Posts: 403	Yes it can.

22 September 2009, 12:19	#4
Retro1234 Phone Homer Join Date: Jun 2006 Location: 5150 Posts: 5,773	Bump* Anyone can shed some light on this Ive got Devs - Bookmark.device cdtv.Device Libs -Playerprefs.library I still cant recreate runing Lemmings and being able to use the JoyPad - Any Ideas?

05 October 2009, 10:26	#5
mk1 Registered User Join Date: Jul 2006 Location: Helsinki / Finland Posts: 403	I would try running the game with a CD32 emulator and see if it works..

16 August 2014, 04:59	#7
earok Registered User Join Date: Dec 2013 Location: Auckland Posts: 3,539	I'm totally confused by this myself - I can play the original Lemmings CDTV ISO and it works just fine with joypad, but if I extract the ISO contents into a folder, make it back into a bootable disc with ISOCD (using the same trademark file that's present on the root of the Lemmings CDTV ISO), joypad doesn't work. What's more is the new ISO is approximately half the size of the previous one (~27mb vs ~57mb), so presumably there's some stuff needed for the joypad to work that's embedded in the ISO but not in the ISO's file system. I've tried adding a bunch of stuff that may be related (playerprefs.lib etc) but to no avail. (The reason I'm bringing this up is I was looking at doing an unofficial Lemmings CD32 compilation with the other games and was hoping to at least get the original playable on a joypad, like it is on the CDTV release)

13 October 2014, 19:17	#9
vox Posts: n/a	Is Lemmings CD32 anyhow better then old Lemmings OCS?(AGA gfx, more music, levels ...). Sadly most of CD32 titles were just straight AGA, or OCS/ECS CD format publishing ...

13 October 2014, 20:47	#10
Amigajay Registered User Join Date: Jan 2010 Location: > Posts: 2,881	No its the same as the OCS release bar its missing the two player mode, well technically its still on the disc but they replaced the 2 player button for a quit one so you cant access the mode.

30 October 2014, 11:24	#11
earok Registered User Join Date: Dec 2013 Location: Auckland Posts: 3,539	I thought I'd have another crack at working out how to get the joypad to work outside of the CDTV ISO. I had a look at it in the WinUAE debugger and put a memory breakpoint on "DFF00C" (which is the hardware register for Port 2, ergo when it gets accessed it's reading the Joystick state). It broke at this line: 1 00E69B2C 3228 000c MOVE.W (A0, $000c) == $00dff00c,D1 Address "00E69B2C" is outside of the game code itself and is in the CD32 ROM. I'm not exactly sure how the program gets to there as there and I think when that location is accessed it's running in a separate thread to the game itself (when I break in the main game code and step through, it never seems to get back there). Someone a lot smarter than me can probably figure it out.

30 October 2014, 19:28	#12
Retro1234 Phone Homer Join Date: Jun 2006 Location: 5150 Posts: 5,773	Again over my head but very intresting - I think I read that Playerprefs.library from the CDTV and CD32 extended roms has some kind of Joypad emulation option but what the answear is I dont know - Because like you say "if I extract the ISO contents into a folder, make it back into a bootable disc with ISOCD- joypad doesn't work" but yes very intrested hope to see a answer some day - also been following a few of your other ideas with interest Pc-Task and NVRAM

31 October 2014, 03:47	#14
earok Registered User Join Date: Dec 2013 Location: Auckland Posts: 3,539	@FOL Yeah, it does seem to be something special about the ISO that makes the game run in joypad mode. I presume it's something to the effect of setting a certain memory address to a certain value, so when the game runs (and detects that value) it activates the mouse emulation code / library (playerprefs?). @BooBoo Cheers, I haven't done any more on PC-Task lately (other than Alley Cat there's probably very few decent PC games that could run at an OK speed on a stock CD32), but myself and some others are doing some interesting things with NVRAM saving stay tuned.

24 January 2015, 13:44	#15
Psygore Moderator Join Date: Jan 2002 Location: France Posts: 491	To have the controll pad mode on CD32 with Lemmings CD, set the volume ID as "LEMMINGS_PLANETSIDE" without the quotes and fill the name with space when creating the iso. You may have issues with games in 2-player mode. Of course, it will not work with the whdload version.

24 January 2015, 20:24	#16
Retro1234 Phone Homer Join Date: Jun 2006 Location: 5150 Posts: 5,773	Thank you for the info - interesting, would it work from HD - I will have a play

25 January 2015, 00:12	#17
earok Registered User Join Date: Dec 2013 Location: Auckland Posts: 3,539	Ah, dang - I actually am using the WHDLoad version on my latest version of the unofficial CD32 ports release (for two player mode and also to select any level without using the password screen) but maybe I could include both for people that don't have a mouse. Thanks for solving the mystery!

26 January 2015, 19:22	#18
Psygore Moderator Join Date: Jan 2002 Location: France Posts: 491	The patch is included in the CD32 rom 3.1. When the CD32 is booting, it reads the CD through the cd.device and compares the volume id and applies different patches. There are about 20 titles (Sim City, Bat, Team Yankee,...) which are patched (allocate public memory instead of chip, disable cpu caches, joymouse,...).

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