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'2026/05'에 해당되는 글 7건

  1. 2026.05.30 New ROM BIOS for SD DISKII Plus
  2. 2026.05.28 LCD Dail
  3. 2026.05.24 IMS Player revising
  4. 2026.05.16 [Homebrew Game] Puyo Puyo
  5. 2026.05.16 Mocking board sound playing
  6. 2026.05.16 IMS Player was started
  7. 2026.05.10 VGM Player Level meter

Dear customers and friends,

 

Good news! I am currently testing a new BIOS for the SD DISKII Plus.

Here is what's changing:

  • Previous BIOS: V1.85A New BIOS: V1.90
  • Key Difference: It now supports SmartPort, so some more games work without any issues.

This update also resolves a reading incompatibility issue that sometimes occurred with certain images extracted from 800K floppy disks.

 

Thank you for your patience.

I will make an official announcement once full testing is complete.

 

Best regards,

Ian Kim

 

 

 

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LCD Dail

◆ SD DISK II / 2026. 5. 28. 12:25

Dear customers and friends,

 

It has been quite a long time since I last produced the LCD Dial.

In the early days, the quality of the LCD parts was fairly good. However, as demand suddenly increased, the quality of the supplied LCD modules dropped significantly. In some cases, the modules were almost unusable, so I had no choice but to stop production.

 

During that time, it became difficult to source high-quality LCDs, so I only made them for a few people who specifically requested them.

This time, I have decided to move away from the old monochrome LCD and am currently working on new firmware for an upgraded version.

 

Both the display capability and overall functions will be greatly improved.

The current display size is 128×128. Since future changes are not too difficult, I decided to start with this size first.

The backlight characteristics are also different, and the clearer display makes it much easier to read.

 

 

Once the firmware work is complete, I will provide the improved LCD Dial.

 

Thank you very much for your patience.

 

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IMS Player revising

◆ SD Music card / 2026. 5. 24. 21:26

IMS Player updating and now can play properly.

I have spent a lot of time thinking about and improving the IMS Player.

This version includes some major improvements.

Full Percussion Mode Support

Percussion mode is now properly supported, with a total of 11-channel playback.

The percussion sounds are now more powerful and clearer. Fixing the bugs in this area took a lot of effort, but I think the result was worth it.

11-Channel Level Meter

All 11 channels are supported by the level meter.

Depending on the song, you may feel a little extra load, but I optimized the code as much as possible to reduce CPU usage.

STEREO / X-WAY Sound Support

IMS songs are originally mono-based, but by using the OPL3 features, I added a wider and more spacious sound.

At the moment,  I call this feature X-WAY, but I may rename it to STEREO later.

It gives the music a slightly different and fun listening experience compared to the original mono sound.

 

https://youtu.be/iBwV-BFMI-Q

 

 

https://youtu.be/qUBw0pf1d8c

 

Increased Number of Selectable IMS Files

The number of IMS files selectable from the menu has been increased from 254 to 384.

I think this should be enough for normal use.

Volume Control

You can now increase or decrease the volume while the music is playing.

Pause / Resume During Playback

During playback, you can press the SPACE key to pause or resume the song.

JUKE BOX Support

My favorite “JUKE BOX” feature is also working well.

You can play songs continuously, and choose whether the next song should be selected upward or downward in the file list.

Progress Bar

A progress bar is shown at the bottom of the screen, so you can roughly see how far the music has progressed.

I tried to add as many useful features as possible while still keeping the performance optimized.

As a result, the Apple II can now play IMS music much better than I originally expected.

Honestly, I put a lot of passion and effort into this program.

Please listen to the music. When X-WAY is turned on in the middle of playback, you can hear the sound change.

System Requirements

  • Apple //e with 65C02
  • SD Music Deluxe card 

Features

IMS music file playback support.

With Hidden Reading, there is effectively no file size limit.
The sample song above is 65KB.

Remaining Work

If an instrument cannot be found, or if the included BNK file is missing, the player will load STANDARD.BNK and fill in the missing instruments automatically.

I also plan to continue speed optimization, especially for faster instrument searching in large STANDARD.BNK files.

Please consider getting an SD Music DX card, and please give lots of love to the IMS Player as well. ^^

Thank you!

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[Source] Homebrew Game, Puyo Puyo (APPLE ][ ® Apple Computer) | Written by: trapung

System Requirements

  • System: Apple II family equipped with a 65C02 CPU (Apple IIe, IIc, or higher)
  • RAM: 128KB

Controls

  • Movement: Cursor keys (Left, Right, Down)
  • Rotation: A key

Key Notes

  • Most of the graphics were adapted from the Game Boy / Game Gear versions of Puyo Puyo.
  • There is some background noise (pop noise) during music playback.
  • The overall polish of the game, including difficulty settings, is still lacking.
  • The display looks much cleaner when using the Composite Idealized mode in AppleWin video settings.

Personal Reflections from the Developer...

  • Unless the noise issue is resolved, it's best to avoid using SoftDAC. For sound, sticking with Mockingboard is the way to go...
  • I implemented a double frame buffer (Page 1 & 2), but it feels like an unnecessary luxury for Double High-Resolution (DHGR) graphics.
  • It's hard to write structured and organized code in Assembly... The code just kept getting messier as the project went on 😭

[Source] Homebrew Game, Puyo Puyo (APPLE ][ ® Apple Computer) | Written by: trapung

 

Puyo.DSK
0.14MB

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Mr. Trapung made it.

 

Just

]BRUN the program

 

Mock.DSK
0.14MB

 

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Hi,

 

I’ve been working on an IMS music player for the Apple II.
(It required the SD Music DX OPL3 card)


IMS file:
For those interested in the technical specs of the 1990s Korean Chiptune/MIDI format (.IMS) powered by Yamaha OPL chips, here is the detailed English wiki page.
https://moddingwiki.shikadi.net/wiki/IMS_Format


Playing IMS songs on Apple II

https://youtu.be/dxkzSFPJ14Q

 

There is still a lot left to tune.

The next big challenge is Hidden Reading.

A 20KB buffer is not enough for longer songs, so the player must read more IMS data from disk while the music is playing. I have already done similar work in my MIDI and VGM players, so I plan to bring that experience into this IMS player as well.

 

I’m also planning a few UI features:

A level meter, so the screen feels alive while music is playing.

A progress display, so users can roughly see where they are in the song.

There are still many details to solve, but the player is finally starting to take shape.

 

Thanks

Ian Kim

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The previous version felt a bit plain during music playback, so after considering several options, I added a level meter.

However, the VGM and DRO formats have very little timing margin during playback, making it difficult to apply the level meter.
IMF has relatively more timing flexibility, so the level meter has been applied to the IMF format first.

It is currently under testing, and if no issues are found, it will be released as an official version.

 

 

You can watch a playback video of the previous version of VGM Player below.
https://youtu.be/wzMZ9yTsEAo?si=CFuAJVtXZzgWef-Z

 

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