<![CDATA[Freeplaytech Forum - All Forums]]> https://forum.freeplaytech.com/ Sat, 01 Aug 2026 01:50:03 +0000 MyBB <![CDATA[Judge Dredd in House of Death]]> https://forum.freeplaytech.com/showthread.php?tid=5514 Fri, 24 Jul 2026 06:59:48 +0000 Ahchay]]> https://forum.freeplaytech.com/showthread.php?tid=5514
This doesn't work on B&W NGP even though it probably should - I need to look into that

Judge Dredd House of Death (Neo Geo Pocket Color) | Indie Retro Games

or playable in browser at the usual place - ahchay.com/NGPC/Play.html?ROMId=HOUSEOFDEATH.ngp]]>
This doesn't work on B&W NGP even though it probably should - I need to look into that

Judge Dredd House of Death (Neo Geo Pocket Color) | Indie Retro Games

or playable in browser at the usual place - ahchay.com/NGPC/Play.html?ROMId=HOUSEOFDEATH.ngp]]> <![CDATA[Xenon 2 Megablast Port]]> https://forum.freeplaytech.com/showthread.php?tid=5513 Thu, 16 Jul 2026 18:59:43 +0000 Napomex]]> https://forum.freeplaytech.com/showthread.php?tid=5513 I'm not a programmer, and apart from industrial controllers like Siemens S7 or a bit of Arduino, I can't code. 
Multiple attempts with Gamebuino and MakeCode Arcade didn't get me the success I was hoping for either, porting my favorite shoot 'em up since childhood. 

Nine months ago I made my first attempt at getting the whole thing running on the NGPC via GPT, which wasn't really successful. 
Now with Claude things look different, and I've made pretty good progress. Unfortunately, as great as AI is, it still doesn't replace people with actual understanding, right now I have three problems, one of which I'll probably manage to solve on my own.

Problem number one: the status bar at the bottom for score and lives currently consists of nine tiles that cycle through to create the effect of a static bar. 
The downside is that this needs too many tiles, and the approach someone suggested to me on Reddit works fine in the emulator but not on real hardware.

Problem number two: even though I haven't maxed out the sprite limit of 64, sprites keep disappearing. I'm trying to solve that today together with my friend Claude, though I'm not sure it'll work out.

Problem number three: with too many enemies on screen, the framerate drops. 
In emulation it runs reasonably smoothly, my guess is it's related to the collision detection, which gets killed once an enemy is dead or off screen. I'm out of ideas, and Claude seems to be out of a plan too.

I hope someone here can help me figure these problems out, because as a noob I'm honestly a bit lost.

https://www.reddit.com/r/ngpc/comments/1..._the_ngpc/]]> I'm not a programmer, and apart from industrial controllers like Siemens S7 or a bit of Arduino, I can't code. 
Multiple attempts with Gamebuino and MakeCode Arcade didn't get me the success I was hoping for either, porting my favorite shoot 'em up since childhood. 

Nine months ago I made my first attempt at getting the whole thing running on the NGPC via GPT, which wasn't really successful. 
Now with Claude things look different, and I've made pretty good progress. Unfortunately, as great as AI is, it still doesn't replace people with actual understanding, right now I have three problems, one of which I'll probably manage to solve on my own.

Problem number one: the status bar at the bottom for score and lives currently consists of nine tiles that cycle through to create the effect of a static bar. 
The downside is that this needs too many tiles, and the approach someone suggested to me on Reddit works fine in the emulator but not on real hardware.

Problem number two: even though I haven't maxed out the sprite limit of 64, sprites keep disappearing. I'm trying to solve that today together with my friend Claude, though I'm not sure it'll work out.

Problem number three: with too many enemies on screen, the framerate drops. 
In emulation it runs reasonably smoothly, my guess is it's related to the collision detection, which gets killed once an enemy is dead or off screen. I'm out of ideas, and Claude seems to be out of a plan too.

I hope someone here can help me figure these problems out, because as a noob I'm honestly a bit lost.

https://www.reddit.com/r/ngpc/comments/1..._the_ngpc/]]> <![CDATA[History of NGPC homebrew]]> https://forum.freeplaytech.com/showthread.php?tid=5512 Sat, 20 Jun 2026 18:10:22 +0000 Ahchay]]> https://forum.freeplaytech.com/showthread.php?tid=5512
I've tried to include most of the major events, but my memory isn't always reliable - let me know if you spot any glaring omissions or mistakes (I'm not 100% sure who did the 3D TIE fighter demo - was that Ivan or Thor?)

https://ahchay.com/NGPC/index.html?blogi...yBreakdown

Edit: I forgot flavor, like an idiot - afk tonight but I'll sort that out first thing tomorrow]]>
I've tried to include most of the major events, but my memory isn't always reliable - let me know if you spot any glaring omissions or mistakes (I'm not 100% sure who did the 3D TIE fighter demo - was that Ivan or Thor?)

https://ahchay.com/NGPC/index.html?blogi...yBreakdown

Edit: I forgot flavor, like an idiot - afk tonight but I'll sort that out first thing tomorrow]]> <![CDATA[New Homebrew release - Horatio Goes Snowboarding]]> https://forum.freeplaytech.com/showthread.php?tid=5511 Mon, 01 Jun 2026 09:12:54 +0000 Ahchay]]> https://forum.freeplaytech.com/showthread.php?tid=5511

Horatio Goes Snowboarding - second in my line of demakes of the Infinite State Games back catalog

Horatio Goes Snowboading for Neo Geo Pocket Color by Chris ahchay]]>

Horatio Goes Snowboarding - second in my line of demakes of the Infinite State Games back catalog

Horatio Goes Snowboading for Neo Geo Pocket Color by Chris ahchay]]> <![CDATA[New homebrew release: Asteroids]]> https://forum.freeplaytech.com/showthread.php?tid=5510 Fri, 15 May 2026 15:13:51 +0000 Ahchay]]> https://forum.freeplaytech.com/showthread.php?tid=5510 underscore42/ngpc-asteroids-neo: Homebrew Game for Neo Geo Pocket - ASTEROIDS neo

Decent effort at an asteroids clone there Big Grin]]> underscore42/ngpc-asteroids-neo: Homebrew Game for Neo Geo Pocket - ASTEROIDS neo

Decent effort at an asteroids clone there Big Grin]]> <![CDATA[Accessing memory over 0x200000]]> https://forum.freeplaytech.com/showthread.php?tid=5509 Mon, 20 Apr 2026 17:28:48 +0000 Ahchay]]> https://forum.freeplaytech.com/showthread.php?tid=5509
Works like a charm, but I'm bashing against compilers 2mib limit

Code:
tulink.exe -la -o ROADRUNNER.abs ngpc.lcf main.rel library.rel vgmplayer.rel spritemanager.rel title.rel player.rel road.rel roadrunner.rel
Toshiba Unified Linker (32) V2.0p
(C)Copyright TOSHIBA CORPORATION 1993-2009  All rights reserved

TULINK-Error-210: "far_const" at "0x200000" won't fit into configured memory
TULINK-Error-201: "far_code" enters unconfigured memory at "0x414F76"
TULINK-Error-201: "far_data" enters unconfigured memory at "0x417FDE"
make: *** [makefile:14: ROADRUNNER.ngp] Error 127

Is there a way I can push all of this boring graphical data into the 0x200000 to 0x3fffff range?

I can see how I could build a file containing the data and then just append it to the compiled .NGP file, and then figure out how to stream it back into the game - but that seems a lot of effort towards an uncertain goal at the moment

Link to a (sort of) playable version here - ahchay.com/NGPC/Play.html?ROMId=ROADRUNNER.ngp

Currently, I'm skipping every other frame in order to fit it into memory - honestly, it's probably good enough, but I'd like to have a crack at it before deciding whether to generate slightly more interesting landscapes]]>
Works like a charm, but I'm bashing against compilers 2mib limit

Code:
tulink.exe -la -o ROADRUNNER.abs ngpc.lcf main.rel library.rel vgmplayer.rel spritemanager.rel title.rel player.rel road.rel roadrunner.rel
Toshiba Unified Linker (32) V2.0p
(C)Copyright TOSHIBA CORPORATION 1993-2009  All rights reserved

TULINK-Error-210: "far_const" at "0x200000" won't fit into configured memory
TULINK-Error-201: "far_code" enters unconfigured memory at "0x414F76"
TULINK-Error-201: "far_data" enters unconfigured memory at "0x417FDE"
make: *** [makefile:14: ROADRUNNER.ngp] Error 127

Is there a way I can push all of this boring graphical data into the 0x200000 to 0x3fffff range?

I can see how I could build a file containing the data and then just append it to the compiled .NGP file, and then figure out how to stream it back into the game - but that seems a lot of effort towards an uncertain goal at the moment

Link to a (sort of) playable version here - ahchay.com/NGPC/Play.html?ROMId=ROADRUNNER.ngp

Currently, I'm skipping every other frame in order to fit it into memory - honestly, it's probably good enough, but I'd like to have a crack at it before deciding whether to generate slightly more interesting landscapes]]> <![CDATA[NGPCraft - nocode engine]]> https://forum.freeplaytech.com/showthread.php?tid=5507 Fri, 27 Mar 2026 09:47:44 +0000 sodthor]]> https://forum.freeplaytech.com/showthread.php?tid=5507 https://www.reddit.com/r/EmuDev/comments...color_dev/]]> https://www.reddit.com/r/EmuDev/comments...color_dev/]]> <![CDATA[New* flash cart - gamebank retrodamper]]> https://forum.freeplaytech.com/showthread.php?tid=5506 Thu, 05 Feb 2026 12:29:04 +0000 Ahchay]]> https://forum.freeplaytech.com/showthread.php?tid=5506
Similar to the older style bung carts I think - a proper dump/flash one game at a time, so not as flexible as either the flashmasta or the retroHQ gamedrive, but they're cheap and easily available. Hand made by the looks of things, but the quality is decent and support excellent. I had trouble flashing roms at first, but they patched the software within a couple of days

Main website: ゲームバンクウェブドットコム Gamebank-web.com レトロダンパー 吸い出し レミュレータ DIY ツクール 魑魅魍魎

Available on amazon.co.jp - they ship internationally, but obviously shipping charges are quite high
https://www.amazon.co.jp/-/en/%E3%83%AC%...B0CWF2K39Z

And the dumper itself https://www.amazon.co.jp/-/en/dp/B0D53G4FWS

I bought the dumper and two carts for just shy of £90, so even with shipping it's a reasonably cost effective way of getting games running on the real consoles - there is a maximum order quantity of 2 though]]>
Similar to the older style bung carts I think - a proper dump/flash one game at a time, so not as flexible as either the flashmasta or the retroHQ gamedrive, but they're cheap and easily available. Hand made by the looks of things, but the quality is decent and support excellent. I had trouble flashing roms at first, but they patched the software within a couple of days

Main website: ゲームバンクウェブドットコム Gamebank-web.com レトロダンパー 吸い出し レミュレータ DIY ツクール 魑魅魍魎

Available on amazon.co.jp - they ship internationally, but obviously shipping charges are quite high
https://www.amazon.co.jp/-/en/%E3%83%AC%...B0CWF2K39Z

And the dumper itself https://www.amazon.co.jp/-/en/dp/B0D53G4FWS

I bought the dumper and two carts for just shy of £90, so even with shipping it's a reasonably cost effective way of getting games running on the real consoles - there is a maximum order quantity of 2 though]]> <![CDATA[both ngpc don't switch on]]> https://forum.freeplaytech.com/showthread.php?tid=5505 Tue, 03 Feb 2026 18:51:45 +0000 sodthor]]> https://forum.freeplaytech.com/showthread.php?tid=5505 <![CDATA[What (if anything) are you all working on?]]> https://forum.freeplaytech.com/showthread.php?tid=5503 Thu, 18 Dec 2025 18:35:31 +0000 Ahchay]]> https://forum.freeplaytech.com/showthread.php?tid=5503
I don't think it'll be that extensive (i think their dev profiles are like half a page max) but i would like to shout out any other projects that might be coming along - anyone got anything on the boil?]]>
I don't think it'll be that extensive (i think their dev profiles are like half a page max) but i would like to shout out any other projects that might be coming along - anyone got anything on the boil?]]> <![CDATA[Framework v4?]]> https://forum.freeplaytech.com/showthread.php?tid=5502 Thu, 04 Dec 2025 18:39:02 +0000 Ahchay]]> https://forum.freeplaytech.com/showthread.php?tid=5502
I've got a bunch of small improvements that I've used in my more recent projects, and of course there's winteriscoming's vgm driver

Would there be any interest in sorting out an update to the framework to bring it a little more up to date? Happy to collaborate of anyone has any ideas for input]]>
I've got a bunch of small improvements that I've used in my more recent projects, and of course there's winteriscoming's vgm driver

Would there be any interest in sorting out an update to the framework to bring it a little more up to date? Happy to collaborate of anyone has any ideas for input]]> <![CDATA[NGPC video encoding tutorial]]> https://forum.freeplaytech.com/showthread.php?tid=5501 Wed, 05 Nov 2025 18:58:19 +0000 NeoGeoFreak2004]]> https://forum.freeplaytech.com/showthread.php?tid=5501 PS: this is using sodthor's (huge shoutout to him for making the tools) conversion tools btw.

.pdf   How to convert videos for the NeoGeo Pocket Color.pdf (Size: 63.13 KB / Downloads: 6) ]]> PS: this is using sodthor's (huge shoutout to him for making the tools) conversion tools btw.

.pdf   How to convert videos for the NeoGeo Pocket Color.pdf (Size: 63.13 KB / Downloads: 6) ]]> <![CDATA[how to include backgrounds in my neogeo pocket color projects?]]> https://forum.freeplaytech.com/showthread.php?tid=5500 Thu, 16 Oct 2025 19:31:05 +0000 NeoGeoFreak2004]]> https://forum.freeplaytech.com/showthread.php?tid=5500 <![CDATA[Don't Die Mr Robot Pocket]]> https://forum.freeplaytech.com/showthread.php?tid=5499 Tue, 16 Sep 2025 21:00:50 +0000 Ahchay]]> https://forum.freeplaytech.com/showthread.php?tid=5499
It's a demake of the excellent DDMR by infinite state games - a cracking game if you're not aware of it, sort of a pacifist robotron

Dev has flown by and this has taken less than two weeks - roped in Mike from ISG for the music and sfx and I think you'll like the end result

The release candidate is on my website at https://ahchay.com/NGPC/index.html?blogid=Projects

Would appreciate any feedback you lot might have

.png   t90p7t0oppiw.png (Size: 15.29 KB / Downloads: 3) ]]>
It's a demake of the excellent DDMR by infinite state games - a cracking game if you're not aware of it, sort of a pacifist robotron

Dev has flown by and this has taken less than two weeks - roped in Mike from ISG for the music and sfx and I think you'll like the end result

The release candidate is on my website at https://ahchay.com/NGPC/index.html?blogid=Projects

Would appreciate any feedback you lot might have

.png   t90p7t0oppiw.png (Size: 15.29 KB / Downloads: 3) ]]> <![CDATA[Wav Music player for neogeo pocket?]]> https://forum.freeplaytech.com/showthread.php?tid=5498 Sun, 07 Sep 2025 13:41:47 +0000 NeoGeoFreak2004]]> https://forum.freeplaytech.com/showthread.php?tid=5498