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_____
/ \ Orientation:
NC (cut) -- / 1 64 \ -- NC (cut) --------------------
GND (*) -- / 2 63 \ <- CPU A1 51 33
CPU A2 -> / 3 (o) 62 \ <- CPU A0 | |
CPU A3 -> / 4 61 \ ?? always low .-----------.
CPU A4 -> / 5 60 \ ?? always low 52-|o DAOU o|-32
CPU R/W -> / 6 59 \ -- VCC | DIS23C01 |
GND -- / 7 58 \ ?? alway high (cut) 64-|o DaOU 245 |-20
CPU A14 -> / 8 57 \ ?? always high \-----------'
GND -- / 9 56 \ ?? always high | |
CIR A10 <- / 10 55 \ ?? always high 01 19
PRG /CE <- / 11 54 \ ?? always high
/IRQ (always low) <- / 12 53 \ ?? always high
PRG A14 <- / 13 52 \ ?? always high
PRG A15 <- / 14 DAOU DIS23C01 51 / ?? always high
PRG A16 <- / 15 Package QFP-64 50 / <- CPU D7
PRG A17 <- / 16 1.00mm pitch 49 / <- CPU D6
PRG A18 <- / 17 (20mm × 14mm) 48 / <- CPU D5
PRG A19 <- / 18 47 / <- CPU D4
PRG A20 <- / 19 46 / <- CPU D3
CHR A10 <- \ 20 45 / <- CPU D2
GND -- \ 21 44 / <- CPU D1
CHR A11 <- \ 22 43 / <- CPU D0
CHR A12 <- \ 23 42 / -- GND
CHR A13 <- \ 24 41 / <- M2
VCC -- \ 25 40 / <- PPU A12
always high (cut) ?? \ 26 39 / <- PPU A11
CHR A14 <- \ 27 38 / <- PPU A10
CHR A15 <- \ 28 37 / -- GND
CHR A16 <- \ 29 36 / <- CPU /ROMSEL
CHR A17 <- \ 30 35 / -- GND
CHR A18 <- \ 31 34 / -- VCC
CHR A19 <- \ 32 33 / ?? always high
\ /
\ /
\ /
V
* pins 1, 64 - no internal connection; externally cut from the package (NC)
* pin 2 - no external con, internally connected to other ground pins
* pins 26, 58 - externally cut
* PRG A pins reflect the bank being set only when M2 is high; when M2 is low, they always go high
* CIRAM A10 is not connected to mapper (premanently wired to GND) on this board (Koko Adventure)
* IRQ pin seems to be non-functional (it is always low)
* This board uses weird pinouts for PRG/CHR eproms (32 holes, pin 2 and 24 both shorted and connected to PRG/CHR A16 respectively), but eproms have pins 24 cut and not soldered to anything (floating)
* A lot of not used pins (but showing signs of internal connection) suggests that this chip maybe some kind of PLD instead of ASIC (just like BF909x from codemasters)