M8 Motorino Game Board
The M8 family grew with the addition of the M8 Game Board (code name Motorino):
The SST-6809 V2.1 board is on the left and the M8 Game Board is on the right.
The M8 Game Board combines a TI TMS9918A Video Display Processor (VDP) such as used for ColecoVision graphics, a Phillips SAA1099P six-channel sound synthesizer, a Motorola 6850 or Hitachi 6350 serial ACIA port, and dual joystick inputs on the 1.0 board, or a single joystick with fire button on the 2.1 board.
Sprite Demo
Here, the M8 Game Board runs a VDP demo with a bouncing sprite over a changing Graphics II mode background.
I/O Memory Map
V2.1
JP1: 1-2
| I/O Memory Map | R/W | IC |
|---|---|---|
| $18-$1B | R/W | TMS9918A VDP |
| $1C-$1F | R/W | MC6821 PIA |
| PIA Port A | R/W | Joystick and I/O Expansion |
| PIA Port B | W | SAA1099P Audio |
JP1: 2-3
| I/O Memory Map | R/W | IC |
|---|---|---|
| $08-$0B | R/W | TMS9918A VDP |
| $0C-$0F | R/W | MC6821 PIA |
| PIA Port A | R/W | Joystick and I/O Expansion |
| PIA Port B | W | SAA1099P Audio |
Source: https://github.com/KenWillmott/M8-Game-Board-V2.1/blob/main/motorino-game.pdf
V2.0
Bit 0 of each HCT541 is a read of the corresponding synth's DTACK pin for polling when using slower commands.
V1.0
| I/O Memory Map | R/W | IC |
|---|---|---|
| 00-07 | R/W | TMS9918A VDP |
| 08-0F | R | HCT541 Joysticks |
| W | SAA1099P Audio | |
| 10-1F | R | MC6850 ACIA |
Bit 0 of each HCT541 is a read of the corresponding synth's DTACK pin for polling when using slower commands.
Source: https://github.com/KenWillmott/M8-Game-Board/blob/main/motorino-game.pdf
References
https://github.com/KenWillmott/M8-Game-Board
M8 Game Board Wiki:
https://github.com/KenWillmott/M8-Game-Board/wiki
Return to SST-6809