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Willams Sound Board ROM Strapping

Early (narrow) pinball / Defender sound boards can be strapped for 6341 (512x8), 6381 (1kx8) or 2716 (2kx8).
Later (square) sound boards can also be strapped for 2532 (2kx8). By adding jumpers to undocumented locations, 2732 is also possible.

First column shows the desired chip pin connections
Second column shows the jumpering for later sound boards with explanations.
Third column shows the jumpering for early sound boards.

6341:
18 = CE4      W3  = A11   J18 = A9
19 = CE3          = A10   J16 = VMA
20 = ~CE2         = ~CE       = ~A11
21 = ~CE1     W11 = ~VMA  J14 = ~A10
22 = n/c      W6  = Vcc   J11 = Vcc

6381:
18 = CE4      W3  = A11   J18 = A9
19 = CE3          = A10   J16 = VMA
20 = ~CE2                     = ~A11
21 = ~CE1                 J14 = ~A10
22 = A9       W5  = A9    J12 = A9

2716:
18 = ~EN      W2  = ~A11  J17 = Gnd
19 = A10          = A10   J15 = A10
20 = ~OE          = ~CE       = ~A11
21 = Vpp      W10 = VMA   J13 = VMA
22 = A9       W5  = A9    J12 = A9

2532:
18 = A11      W3  = A11
19 = A10          = A10
20 = ~CE          = ~CE
21 = Vpp/~OE  W11 = ~VMA
22 = A9       W5  = A9

2732:
2732:
18 = ~CE          = ~VMA  (isolated pin of W11 to common pin of W3)
19 = A10          = A10
20 = Vpp/~OE      = ~CE
21 = A11          = A11   (isolated pin of W3 to common pin of W11)
22 = A9       W5  = A9
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