1 NIC*       => NC
2 P1.0/T2    => IC12 P1             => ADC /CS
3 P1.1/T2EX  => IC12 P6             => ADC DO
4 P1.2       => IC12 P5             => ADC REF
5 P1.3       => NC
6 P1.4       => NC
7 P1.5       => X19  P13            => Buttons 6-10 Select
8 P1.6       => X20  P14            => Buttons 1-5 Select
9 P1.7       => NC
10 RST       => IC7  P6             => Power good
11 P3.0/RxD  => X18  P3             => MIDI RX
12 NIC*      => NC
13 P3.1/TxD  => IC4  P9             => MIDI TX
14 P3.2/INT0 => NC?
15 P3.3/INT1 => NC?
16 P3.4/T0   => IC6  P6, IC12  P7   => ADC CLK
17 P3.5/T1   => IC6  P5
18 P3.6/WR   => IC14 P27
19 P3.7/RD   => IC14 P22
20 XTAL2     => XTAL
21 XTAL1     => XTAL
22 VSS       => GND
23 NIC*      => NC
24 P2.0/A8   => IC14 P25
25 P2.1/A9   => IC14 P24
26 P2.2/A10  => IC14 P21
27 P2.3/A11  => IC14 P23
28 P2.4/A12  => IC14 P2
29 P2.5/A13  => IC13 P26
30 P2.6/A14  => IC14 P1
31 P2.7/A15  => IC5  P5
32 PSEN      => IC13 P20
33 ALE       => ?
34 NIC*      => NC
35 EA/VPP    => GND
36 P0.7/AD7  => IC13 P19
37 P0.6/AD6  => IC13 P18
38 P0.5/AD5  => IC13 P17
39 P0.4/AD4  => IC13 P16
40 P0.3/AD3  => IC13 P15
41 P0.2/AD2  => IC13 P13            => (Latched by IC9) Decoder A2
42 P0.1/AD1  => IC13 P12            => (Latched by IC9) Decoder A1
43 P0.0/AD0  => IC13 P11            => (Latched by IC9) Decoder A0
44 VCCA      => VCC

IC3:  74HC273D Octal D-type flip-flop
IC4:  74HC04D  Hex inverter
IC5:  74hc138D 3-to-8 line decoder/demultiplexer; inverting
IC6:  ATMLH716 ?EEPROM?
IC7:  7705AC   Supply-Voltage Supervisor
IC8:  W78C032C microcontroller
IC9:  74HC373D Octal D-type transparent latch; 3-state
IC10: 74HC273D Octal D-type flip-flop
IC11: 74HC273D Octal D-type flip-flop
IC12: C0832C   8-Bit Analog to Digital Converter
IC14: KM62256C 64k x 8bit SRAM