JUMPERS GALORE: --------------- AS-2518-17 MPU: -- We recommend upgrading to an AS-2518-35 MPU! -- Jumper options are limited to original ROMs; using EPROMs would require board modifications. AS-2517-35 MPU: -- U1 and U2 must be identical type chips in games that have a U1! -- U1 is never used when U2 is a 4K chip! -- 9332A masked ROM was used in approximately Xenon through Vector. When used for U2, a 9332A must also be used in U6; the jumpers interrelate, unlike with most other chip combinations. If U1/U2 is a... ...then use these jumpers ---------------- ----------------------------------- 2316 masked ROM 1-4, 2-6, 7-8, 9-11, 12-36, 13-15 2716 EPROM 1-5, 2-4, 7-8, 10-12, 11-25, 13A-14 2532 EPROM or 4-12, 7-8, 10-11, 13A-14 9332 masked ROM 2732 EPROM 4-13A, 7-8, 9-12, 10-11 9332A masked ROM 4-12, 7-8, 9-11, 13-15 If U6 is a... ...then use these jumpers ---------------- ----------------------------------- 2316 masked ROM 16A-19, 31-32, 33-34 2716 EPROM 16A-18, 31-32, 33-35 2532 EPROM or 16A-34, 29-33, 31-32 9332 masked ROM 2732 EPROM 16A-29, 31-32, 33-35 9332A masked ROM 16A-34, 29-33, 31-32 AS-2518-51 Computer Sound Module If U3 CPU is a... ...then jumper this way ----------------- ----------------------------------- 6802 install A, remove B, remove U10 RAM 6808 install B, remove A, install U10 RAM If U4 is a... ...then jumper this way ------------- ----------------------------------- 9316 ROM or install C, remove D 2716 EPROM 9332 ROM or install D, remove C 2532 EPROM 2732 EPROM NOT VALID (sorry!) AS-2518-56 Sounds Plus board: -- Can be used as a direct substitute for AS-2518-51 -- If not using in conjunction with AS-2518-57 Vocalizer (i.e. when using as a substitute for AS-2518-51), remove C27. [At least, that's what the schematic says. C25 seems like a more useful one to remove, though it really ought to work without any modifications.] If U3 CPU is a... ...then jumper this way ----------------- ----------------------------------- 6802 install A, remove B, remove U10 RAM 6808 install B, remove A, install U10 RAM If U4 is a... ...then jumper this way ------------- ----------------------------------- 9316 ROM or install C and E, remove D and F 2716 EPROM 9332 ROM or install D and E, remove C and F 2532 EPROM 2732 EPROM install C and F, remove D and E AS-2518-57 Vocalizer board: -- U1 through U7 can each be set to a unique chip type via its own set of "A B C D" jumpers. If U1-7 is a... ...then jumper this way --------------- ----------------------------------- 9316 ROM or install A and D, remove B and C 2716 EPROM 9332 ROM or install B and D, remove A and C 2532 EPROM 2732 EPROM install A and C, remove B and D AS-2518-61/61A/61B Squawk and Talk board: -- "A" variant added some sort of delayed-power circuit to the speech chip, presumably to correct odd noises on powerup? -- "B" variant added in/out signals for Say It Again reverb board, so only Centaur requires the B variant. (All games after Centaur shipped with B variant anyway.) If U1 CPU is a... ...then jumper this way ----------------- ----------------------------------- 6802 install K, remove L, remove U6 RAM 6808 install L, remove K, install U6 RAM -- If any of U2 through U5 are 4K (2532/9332/2732), then install jumpers C and E, and remove jumpers A and B. If only 2K chips (2716/9316) are used, then install A and B, and remove C and E. -- Original schematic has an error in the jumpering notes for 2532/9332: they neglected to list jumper "D" as needed. If U2 is a... ...then jumper this way ------------- ----------------------------------- 9316 ROM or install D and P, remove F and G 2716 EPROM 9332 ROM or install D and G, remove F and P 2532 EPROM 2732 EPROM install F and P, remove D and G If U3 is a... ...then jumper this way ------------- ----------------------------------- 9316 ROM or install Q and T, remove R and S 2716 EPROM 9332 ROM or install Q and S, remove R and T 2532 EPROM 2732 EPROM install R and T, remove Q and S If U4 is a... ...then jumper this way ------------- ----------------------------------- 9316 ROM or install U and X, remove V and W 2716 EPROM 9332 ROM or install U and W, remove V and X 2532 EPROM 2732 EPROM install V and X, remove U and W If U5 is a... ...then jumper this way ------------- ----------------------------------- 9316 ROM or install Y and BB, remove Z and AA 2716 EPROM 9332 ROM or install Y and AA, remove Z and BB 2532 EPROM 2732 EPROM install Z and BB, remove Y and AA If speech is... ...then jumper this way --------------- ----------------------------------- Required install J and remove H Not required install H and remove J If U12 is... ...then jumper this way ------------ ----------------------------------- Present remove EE jumpers (5 of them) Not present install EE jumpers (5 of them) If game is... ...then jumper this way ------------- ----------------------------------- Centaur remove FF (requires AS-2518-61B) Not Centaur install FF (if using AS-2518-61B) If volume is... ...then jumper this way --------------- ----------------------------------- CPU controlled install M and CC, remove N and DD (this is normal) Remotely controlled install N and DD, remove M and CC