Casio PV-1000/ASIC pinout
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/^\
/ \
/ \
VCC -- / 1 64 \ ?? ??
?? ?? / 2 63 \ <- GPI63 / rpFDd0
Red <- / 3 62 \ <- GPI62 / rpFDd1
Green <- / 4 61 \ <- GPI61 / rpFDd2
Blue <- / 5 60 \ <- GPI60 / rpFDd3
/CSync <- / 6 59 \ -- Gnd
/Colorburst <- / 7 58 \ -- VCC
square$FA <- / 8 57 \ ?? Gnd / ?rpFDd4?
square$F9 <- / 9 56 \ ?? Gnd / ?rpFDd5?
square$F8 <- / 10 55 \ -> GPO55 / wpFDq0
Gnd ?? / 11 ( ) 54 \ -> GPO54 / wpFDq1
9MHz -> / 12 53 \ -> GPO53 / wpFDq2
/BUSRQ <- / 13 52 \ -> GPO52 / wpFDq3
/BUSACK -> / 14 51 / ?? ?wpFDq4?
/WR -> / 15 50 / ?? ?wpFDq5?
/RD <> / 16 49 / ?? ?? Orientation:
/IORQ -> / 17 48 / -> /RAMCE | |
/MREQ <> / 18 47 / ?? ?? .------------.
/INT <- / 19 46 / <? /RESET 52-| NEC JAPAN |-32
D7 <> \ 20 45 / <> A0 | D65010G031 |
D6 <> \ 21 ( ) 44 / <> A1 |O O|
D5 <> \ 22 43 / <> A2 | |
D4 <> \ 23 42 / <> A3 64-| 8337P5 |-20
D3 <> \ 24 41 / <> A4 '------------'
D2 <> \ 25 40 / <> A5 | |
VCC -- \ 26 39 / <> A6 1 19
Gnd -- \ 27 38 / <> A7
D1 <> \ 28 37 / <> A8 Legend:
D0 <> \ 29 36 / <> A9 ------------------------------
A15 <> \ 30 35 / <> A10 --[chip]-- Power
A14 <> \ 31 34 / <> A11 ->[chip]<- Input
A13 <> \ 32 33 / <> A12 <-[chip]-> Output
\ / <>[chip]<> Bidirectional
\ / ??[chip]?? Unknown
\ /
V
By context on the PCB, it is implied that pins 51 and 50 are additional GPOs, but they were cut during rework.
Similarly, it is implied that some of pins 59, 57, 56 could be additional GPIs.
"rpFDdN" means "read from port FD, bit N" "wpFDqN" means "write to port FD, bit N"
