Embedded Image Gallery

Images extracted from the KN5000 firmware ROMs. These graphics are displayed on the built-in LCD screen (320x240 pixels, controlled by IC206 MN89304).

Feature Demo Images (Table Data ROM)

These BMP images are used in the keyboard’s feature demonstration mode.

System Update Bitmaps

The Table Data ROM also contains 8 system update message bitmaps at address 0x9FA156. These are the same images as the Main CPU ROM system update bitmaps - both ROMs share identical bitmap data.

Address Image Purpose
0x9FA156 Flash Memory Update Update in progress
0x9FA3BE Now Erasing Flash erase in progress
0x9FA626 FD to Flash Memory Copying from floppy
0x9FA88E Completed Operation complete
0x9FAAF6 Please Wait Processing
0x9FAD5E Change FD 2 of 2 Multi-disk prompt
0x9FAFC6 Illegal Disk Invalid disk error
0x9FB22E Turn On AGAIN Restart instruction

Note: The Table Data ROM uses 16-bit word-level interleaving (stored across two physical ROM chips: odd.ic1 and even.ic3). When properly combined, the bitmap data is byte-identical to the Main CPU versions. The disassembly source shares the same bitmap files between both ROMs.

FTBMP01 - Technics Logo + World Globe (FTDEMO_SCREEN01_TECHNICS_GLOBE)

FTBMP01

320x240, 8-bit color — The Technics brand logo overlaid on a world globe graphic. Used as the opening image of the Feature Demo presentation.

FTBMP02 - Subwoofers (FTDEMO_SCREEN02_SUBWOOFERS)

FTBMP02

320x130, 8-bit color — A showcase image of the KN5000’s integrated subwoofer speakers.

FTBMP03 - Floppy Disks (FTDEMO_SCREEN03_FLOPPY_DISKS)

FTBMP03

320x120, 8-bit color — A collection of floppy disks, highlighting the keyboard’s built-in floppy drive.

FTBMP04 - Disk Insertion (FTDEMO_SCREEN04_DISK_INSERT)

FTBMP04

320x120, 8-bit color — A floppy disk being inserted into the KN5000’s drive slot.

FTBMP05 - 360° Surround Arrows (FTDEMO_SCREEN05_SURROUND_ARROWS)

FTBMP05

320x125, 8-bit color — Arrows arranged in a 360° pattern, representing the keyboard’s surround sound capabilities.

FTBMP06 - KN5000 + Rainbow Comet (FTDEMO_SCREEN06_KN5000_RAINBOW)

FTBMP06

320x240, 8-bit color — The KN5000 model name with a rainbow comet graphic. Used as the closing image of the Feature Demo presentation.

Note: All six FTBMP images reside on floppy disk (not in ROM). The “IN COLOR” text visible in the Feature Demo splash screen is pre-rendered directly into these bitmap files. Disassembly symbols: FTDEMO_SCREEN01_TECHNICS_GLOBE through FTDEMO_SCREEN06_KN5000_RAINBOW.

Main CPU ROM Images

These images were extracted from raw bitmap data in the main CPU ROM and converted to PNG.

Status Messages (1-bit bitmaps, 224x22 pixels)

Image Filename Purpose
Flash Memory Update Bitmap_1bit_Flash_Memory_Update.bin Flash Memory Update message
Now Erasing Bitmap_1bit_Now_Erasing.bin Now Erasing message
FD to Flash Memory Bitmap_1bit_FD_to_Flash_Memory.bin FD to Flash Memory message
Completed Bitmap_1bit_Completed.bin Completed message
Please Wait Bitmap_1bit_Please_Wait.bin Please Wait message
Change FD 2 of 2 Bitmap_1bit_Change_FD_2_of_2.bin Change FD 2 of 2 message
Illegal Disk Bitmap_1bit_Illegal_Disk.bin Illegal Disk error
Turn On AGAIN Bitmap_1bit_Turn_On_AGAIN.bin Turn On AGAIN instruction

Logos

Image Filename Dimensions Description
Technics Logo BitmapTechnicsLogo.bin 312x45, 8-bit Technics brand logo
KN5000 Logo BitmapKN5000Logo.bin 200x36, 8-bit KN5000 model logo

Split Point Indicators (58x52 pixels, 8-bit)

These images show keyboard split point notes displayed when configuring the keyboard split.

Image Note
Split C C
Split Db Db
Split D D
Split Eb Eb
Split E E
Split F F
Split Gb Gb
Split G G
Split Ab Ab
Split A A
Split Bb Bb
Split B B
No Split No Split

Drawbar Sliders (22x222 pixels, 8-bit)

Image Filename Description
Drawbar 1 BitmapDrawbarNumberedSlider_1.bin Drawbar slider 1
Drawbar 2 BitmapDrawbarNumberedSlider_2.bin Drawbar slider 2
Drawbar 3 BitmapDrawbarNumberedSlider_3.bin Drawbar slider 3

MIDI Connection Diagrams (296x108 pixels, 8-bit)

Image Filename Description
MIDI 1 BitmapMIDIConnections_1.bin MIDI connections diagram 1
MIDI 2 BitmapMIDIConnections_2.bin MIDI connections diagram 2
MIDI 3 BitmapMIDIConnections_3.bin MIDI connections diagram 3

UI Elements

Image Filename Dimensions Description
Worm BitmapWormWearingHat.bin 24x24, 8-bit Easter egg - worm wearing hat
Arrows BitmapSomeArrows.bin 294x6, 8-bit Arrow icons strip

Transition Effects

Image Filename Dimensions Description
Fade In Picture BitmapFadeInPicture.bin 112x25, 8-bit Fade in picture effect
Fade Out Picture BitmapFadeOutPicture.bin 114x25, 8-bit Fade out picture effect
Fade In Text BitmapFadeInText.bin 80x18, 8-bit Fade in text effect
Fade Out Text BitmapFadeOutText.bin 108x20, 8-bit Fade out text effect

Accompaniment & Edit Graphics

Image Filename Dimensions Description
Accger16 BitmapAccger16.bin 120x95, 8-bit Accompaniment graphic (German)
Accita16 BitmapAccita16.bin 120x95, 8-bit Accompaniment graphic (Italian)
Bmphk BitmapBmphk.bin 100x120, 8-bit Unknown graphic
Dredt0d BitmapDredt0d.bin 168x119, 8-bit Unknown graphic
Dredt0k BitmapDredt0k.bin 88x119, 8-bit Unknown graphic
Ntedt0d BitmapNtedt0d.bin 240x127, 8-bit Note edit graphic
Ntedt0k BitmapNtedt0k.bin 127x16, 8-bit Note edit graphic small

HDAE5000 Hard Disk Expansion ROM Images

These images were extracted from the HD-AE5000 hard disk expansion ROM. The images are 8-bit indexed color, displayed on the KN5000’s LCD during HD-AE5000 operations.

Palette discovery: Disassembly analysis found the boot code at 0x28f585 loads palette data from ROM offset 0x65dce. The icon uses a separate Windows halftone-style palette at 0x6158e.

HDAE5000 Logo

320x240, 8-bit indexed color - ROM offset: 0x2898e (CPU: 0x2A898E)

Shows the HD-AE5000 product name with a stylized hard disk drive graphic.

Hands Operating HD-AE5000

HDAE5000 Hands

320x240, 8-bit indexed color - ROM offset: 0x3b98e (CPU: 0x2BB98E)

Promotional image showing hands operating the HD-AE5000 unit connected to a KN5000 keyboard.

File Selection Panel

HDAE5000 File Panel

320x240, 8-bit indexed color - ROM offset: 0x4e98e (CPU: 0x2CE98E)

UI panel showing file selection interface with textured button areas.

Hard Disk Icon

HDAE5000 Icon

28x28, 8-bit indexed color - ROM offset: 0x6198e (CPU: 0x2E198E)

Small icon depicting a hard disk with magnetic head, used in UI elements.

Preset Wallpapers (Table Data ROM)

These background wallpapers are built into the firmware for the LCD display. Discovered via the SetWallPaper routine which references a wallpaper table at 0xEAAE62.

Technical details:

  • Format: 320×240 pixels @ 8bpp (76,800 bytes each)
  • Uses the standard KN5000 256-color palette
  • The wallpaper table has 6 entries, but only entries 0-1 point to ROM data; entries 2-4 point to RAM addresses for user-loaded wallpapers

Wallpaper 0 - Blue Texture

Wallpaper 0

320x240, 8-bit indexed color - Table Data ROM offset: 0x8ED000-0x8FFC00

Blue textured pattern resembling fabric or carpet.

Wallpaper 1 - Technics Branded

Wallpaper 1

320x240, 8-bit indexed color - Table Data ROM offset: 0x900000-0x912C00

Blue textured pattern with subtle “Technics” watermark.

Wallpaper Routine Details

The wallpaper system uses multiple name getter routines for displaying wallpaper names in the UI:

Routine Address Purpose
WP_GetConfigName 0xF8EDD2 Get name from config at 0x1ED350
WP_GetNameByOffset 0xF8EE00 Get name with calculated offset
WP_GetPresetName1 0xF8EE30 Lookup from ROM table 0xEA07AE
WP_GetPresetPtr 0xF8EE56 Simple pointer lookup from 0xEA07EA
WP_GetBankMemName 0xF8EE65 Get name with bank/memory selection
WP_GetPresetName3 0xF8EEB5 Lookup from ROM table 0xEA08DA
WP_GetUserName1 0xF8EEDB Get from structure at 0x1E0000
WP_GetUserName2 0xF8EF08 Get from RAM at 0x1E4980
WP_GetUserName3 0xF8EF2C Get from 0x1E4AA7

UI Icons (Table Data ROM)

The KN5000 uses 176 small icons for menu items and UI elements. These were discovered by analyzing the DrawIcons routine at 0xFABF9B.

Technical details:

  • Icon table at 0x938000 (Table Data ROM offset 0x138000)
  • All 176 icons are 24×24 pixels @ 4bpp (288 bytes each)
  • The DrawIcons routine has hardcoded loops: 12 bytes/row × 24 rows
  • The “dims” field in the table is the UI bounding box (for hit testing), NOT pixel dimensions
  • 4bpp format: 2 pixels per byte (high nibble first, low nibble second)
  • 16-color CGA/EGA-style palette from main ROM at 0xEB37DE

Color Palette:

Nibble Palette Index Color
0 0x00 Black
1 0x01 Dark Red
2 0x02 Dark Green
3 0x03 Olive
4 0x04 Dark Blue
5 0x05 Dark Magenta
6 0x06 Dark Cyan
7 0x07 Light Gray (background)
8 0xF8 Dark Gray
9 0xF9 Bright Red
10 0xFA Bright Green
11 0xFB Yellow
12 0xFC Bright Blue
13 0xFD Magenta
14 0xFE Cyan
15 0xFF White

Icon Sprite Sheet

Icon Sprite Sheet

384x264 pixels - all 176 icons arranged in 16 columns × 11 rows

The sprite sheet shows all 24×24 pixel icons. Icon IDs are numbered left-to-right, top-to-bottom starting from 0. Known icons include:

  • Icon 0-1: Document/file icons
  • Icon 7: Appears to be related to Easter egg (worm reference in code)

Icons with Non-Standard Bounding Boxes

Three icons have larger bounding boxes for UI hit-testing purposes, but still use standard 24×24 pixel data:

Icon Bounding Box Notes
173 27×27 Standard 24×24 pixel data
174 27×27 Standard 24×24 pixel data
175 28×28 Standard 24×24 pixel data

Icon Table Structure

Each icon table entry is 8 bytes:

Offset Size Description
0 2 Bounding box width (for UI hit testing, NOT pixel width)
2 2 Bounding box height (for UI hit testing, NOT pixel height)
4 4 Pointer to pixel data in ROM

Most icons have bounding box 0x18 × 0x18 (24×24). The DrawIcons routine ignores these values for rendering - it always draws 24×24 pixels using hardcoded loops (12 bytes/row × 24 rows).

Image Format Notes

  • Table Data BMP: Standard Windows BMP format, 8-bit indexed color
  • Main CPU raw: Custom format, raw pixel data without headers, uses RGBA palette at 0xEB37DE
  • HDAE5000 raw: Raw pixel data, main images use palette at ROM offset 0x65dce, icon uses halftone palette at 0x6158e
  • 1-bit bitmaps: Monochrome, 224x22 pixels (28 bytes per row) - shared between Main CPU and Table Data ROMs
  • 8-bit bitmaps: 256-color indexed, dimensions vary by image
  • LCD resolution: 320x240 pixels (QVGA)
  • LCD controller: MN89304 with 4Mbit Video RAM (IC207)

Cross-ROM Shared Graphics

Analysis found ~39 KB of near-identical graphics data shared between the Main CPU Program ROM and Table Data ROM. These are not exact duplicates — they match 89-96% at the byte level, with differences primarily in adjacent byte ordering (suggesting different rendering passes of the same source artwork).

Main CPU Image Main CPU Address Table Data Address Size Match
BitmapTechnicsLogo (tail) 0xE90090 0x91D0EA 13,806 B 93.5%
BitmapKN5000Logo (tail) 0xE93680 0x82CDA4 7,198 B 89.8%
BitmapBmphk (tail) 0xE7C8B0 0x921176 9,282 B 95.9%
FadeIn/FadeOut bitmaps 0xEB8190 0x809AD6 8,964 B 94.3%

Conclusion: Because the copies are not byte-identical, sharing via binclude is not feasible. Both ROMs were compiled independently with their own bitmap rendering, resulting in near-identical but distinct binary representations of the same visual content.

Converting New Images

When new images are extracted as .bin files:

  1. Add metadata to convert_images.py in the ROM disassembly repo
  2. Run make gallery to convert and copy to this site
  3. Update this page with the new images
  4. Commit both repositories together

See Reverse Engineering - Embedded Images for the extraction workflow.