Products / Sum A4000
Sum adapter enables connecting USB HID keyboards to your Amiga 4000/CD32. Sum is based upon 16-bit Microchip microcontroller.
Sum provides built-in USB stack which enables USB HID keyboards support without the need for installing additional AmigaOS software drivers. The whole installation process comes down to simply connecting a Sum adapter’a plug to the keyboard port of your Amiga A4000/CD32.
Additional feature of the adapter is its „Bootloader” function allowing future firmware upgrades.
Sum comes with dedicated configuration mode, which becomes available when one presses simultaneusly R-Shift + Pause keys. User preferences are saved to the built-in EEPROM memory – thanks to which when you reconnect the device – it is already configured!
Features of Sum A4000
- support for both USB HID,
- Amiga 4000/CD32 compatibility,
- built-in USB stack,
- configuration mode for PC keyboard (activated by R-Shift + Pause key combination),
- built-in EEPROM memory enabling user preferences storage,
- „Bootloader” function allowing future firmware upgrades,
- „Status” indicator LED providing information about device’s state,
- built around 16-bit Microchip microcontroller utilizing nanoWatt technology,
Entering configuration mode (R-Shift + Pause)
- F1 - RESET type - software (A2000,A3000,A4000,CD32,CDTV) or hardware (A600,A1200),
- F2 - mapped Amiga Right to Alt Right,
- F10 - view keycode (on / off),
- F12 - display configuration
Mapping keys
| Amiga keys | USB keyboard |
|---|---|
| Amiga reset | CTRL + L-Win + R-Win CTRL + L-Alt + R-Alt CTRL + L-Alt + Del |
| Help | F12 |
| L-Amiga | L-Win |
| R-Amiga | R-Win |
Firmware:
Sum_20240924.7z
Sum_20210923.7z
Sum_20210916.7z
Sum_20160619.7z
User manual: 
Software:
[Windows] - SumFlasher_Setup_v0.5.exe