| Wheel Support | Other |

SAM Mouse Turbo

This interface (made by Velesoft) works with any modern USB or PS/2 mouse. The SAM Mouse Turbo is fully compatible with the original SAMCo Mouse, both in standard and extended modes.

• quadruple move recognition speed (high speed mode)
• third button support
• left/right button swapping
• led diode - mouse software support detection
• inhibit switch
• cursor joystick port for cursor and CNTRL keys emulation
• simultaneous use of cursor keys and mouse (data collision correction)
• extra features toggle on the fourth mouse button
• extra - original/extended mode - switch (2014 version)
• five buttons support (extended mode - 2014 version)
• axis data read correction (2014 version)
• wheel support (extended mode - 2014 version)

SAM Mouse Turbo 2014 technical details

Any mouse with the PS/2 protocol, 5 buttons and a wheel is supported. Firmware of the interface is based on the standard SAMCo Mouse communication. 10 values should be read from the port #FFFE.

The original SAMCo Mouse uses big counters for X and Y axis with a 12bit value (2048 steps). Now are counters reduced to 8bit as in the Kempston Mouse for the ZX Spectrum. High 4 bits are unused and only hw-emulated for a backward compatibility.

Communication protocol

01 keyboard state
02 keyboard state
03 mouse buttons (5 bits)
04 X-axis counter (high 4 bits)
05 X-axis counter (middle 4 bits)
06 X-axis counter (low 4 bits)
07 Y-axis counter (high 4 bits)
08 Y-axis counter (middle 4 bits)
09 Y-axis counter (low 4 bits)
10 mouse wheel counter (5 bit value)

Mouse wheel data

D0 = log.1 - wheel move - UP or DOWN
D1 = log.0 if detected wheel UP
D2 = log.0 if detected wheel UP
D3 = log.0 if detected wheel DOWN
D4 = log.0 if detected wheel DOWN