Support System 11

[neophob]

Hardware

• CPU: m6800
• MC6821 Peripheral interface adapter (PIA)

Versions

• System 11: first generation of system 11.
• System 11A: second generation of system 11. System 11a boards can be used in system 11 games too.
• System 11B: third generation of system 11. Actually there were two version of System 11B boards, with the first version having the sound amplifier at U1 (a TDA2002). Special solenoids now CPU controlled and games have Auxiliary power driver board (actually these both started with "Big Guns, the last system 11a game).
• System 11C: fourth generation of system 11. System 11c boards can only be used in system 11c games because all sound circuits have been removed from the CPU board. There are no ROMs at U21 and U22, and most of the circuitry from the top left corner of the board has been moved to the sound board.

The most flexible CPU is system 11b. This board can be used in system 11, 11a, 11b or even 11c. To use a system 11b board in a system 11c game, you just don't use connectors 1J16 (volume control) and 1J15 (speakers) on the system 11b board. Also the sound ROMs at U21 and U22 are not used, since they are moved to the sound board.

Display

Score Displays Used in System 11 Games. The score displays uses in System 11 games varies. Initially (High Speed to Millionaire), Williams used

• five score displays: two 7 character alpha-numeric displays
• two 7 character-7 segment numeric displays
• one four character numeric display (for the credits and ball in play).

Starting with F-14 Tomcat, Williams dropped the 4 character credit display, and all four display glasses were now mounted on a single circuit board. The software now displayed credits and ball in play in the four displays (this saved some production costs). Then when Taxi came out, Williams switched to using two 16 character alpha-numeric displays.

Games

Bad cats - Nov. 1989. 11B
Banzai Run - May 1988. 11B
Big guns - Oct. 1987. 11A
Black Knight 2000 - April 1989. 11B
Bugs Bunny Birthday Ball - Jan. 1991. 11C (the last system 11 game made)
Cyclone - Feb. 1988. 11B
Diner - Sept. 1990. 11C
Dr. Dude - Nov. 1990.11C
Earthshaker - Feb. 1989. 11B
Elvira and the Party Monsters - Oct. 1989. 11B
F -14 tomcat - March 1987. 11A
Fire! - August 1987. 11A
Gameshow - April 1990. 11C
Grand Lizard - April 1986. System 11
High Speed - Jan 1986. System 11 (the first system 11 game made and the highest production run at 17080)
Jokerz - Dec. 1988. 11B
Millionaire - Jan. 1987. 11A
Mousin around - Dec. 1989. 11B
Pin*Bot - Oct. 1986. 11A
Police Force - August 1989. 11B
Pool sharks - June 1990. 11C
Radical! - Sept. 1990. 11C (lowest production run at 1315)
Riverboat Gambler - Nov. 1990.11C
Road Kings - July 1986. System 11
Rollergames - June 1990. 11C
Space Station - Dec. 1987. 11B
Swords of fury - June 1988. 11B
Taxi - August 1988. 11B
Transporter - April 1989. 11B
Whirlwind - Jan. 1990. 11B

[neophob]

6800 CPU:

• https://github.com/mypluribus/mypluribus.github.io/tree/master/m6800
• https://github.com/Shyann/Sim-6800
• https://github.com/vpinball/pinmame/tree/master/src/cpu/m6800
• https://github.com/jonbstanley/Tek405xEmulator/blob/master/mc6800.js

[frollard]

Recognizing this is pretty old now - Would love to see this for System 11/6800. Phenomenal work!