====== M8 Motorino Game Board ======

The M8 family grew with the addition of the M8 Game Board (code name Motorino):

{{:sst-6809:sst_and_game_board.png?400|SST-6809 V2.1 with M8 Game Board}}

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 [[WP>TMS9918A]] Video Display Processor (VDP) such as used for ColecoVision graphics, a Phillips [[WP>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 =====

{{:sst-6809:vdp09.png?400|M8 Game Board running VDP09 Demo}}

Here, the M8 Game Board runs a [[https://github.com/KenWillmott/M8-Game-Board/blob/main/vdp.asm|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 ====

^ I/O Memory Map  ^ R/W  ^ IC  ^
| 00-07  | R/W  | [[TMS9918A]]  |
| 08-0F  | R    | [[HCT541]]  |
| :::    | W    | [[SAA1099P]] A  |
| 18-1F  | R    | [[HCT541]]  |
| :::    | W    | [[SAA1099P]] B  |

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:]]