Pinouts¶

V1¶

Use in core¶

Cartridge/PBI interface

By connection to FPGA¶

V2¶

Use in core¶

Interface 1:
1-16: A0-A15 (1=A0,2=A1, etc)
17-24: D0-D7 (17=D0, 18=D1 etc)
25: PHI2
26: HALT (not implemented yet)
27: RST_N
28: IRQ_N
29: D1XX (not implemented yet)
30: CASINH_N
31: CCTL_N
32: REF_N
33: CAS_N
34: MPD_N
35: RAS_N
36: RW_N
37: RD4
38: S4_N
39: S5_N
40: RD5

Interface 2:
1: USBDM (FTDI USB RS232)
2: USBRES (FTDI USB RS232)
3: USBDP (FTDI USB RS232)
4: GND
5: 5V0
6: 5V0
7: J2 ANAL_B (Paddle in)
8: J2 ANAL_A
9: J1 ANAL_B
10:J1 ANAL_A
11:J2 FIRE
12:J2 UP
13:J2 DOWN
14:J2 LEFT
15:J2 RIGHT
16:J1 FIRE
17:J1 UP
18:J1 DOWN
19:J1 LEFT
20:J1 RIGHT
21:J4 FIRE
22:J4 UP
23:J4 DOWN
24:J4 LEFT
25:J4 RIGHT
26:J3 FIRE
27:J3 UP
28:J3 DOWN
29:J3 LEFT
30:J3 RIGHT
31:GND
32:SIO IRQ
33:SIO PROCEED
34:SIO MOTOR_EN
35:SIO COMMAND
36:SIO DATA OUT
37:SIO DATA IN
38:CLOCK OUT
39:CLOCK IN
40:EXTSEL_N

By connection to FPGA¶

Useful information if building your own core.
In general pins have 100 ohm resistance to the FPGA itself. The FPGA max voltage on IO is 3.3V.

GPIO:
1-17: direct to FPGA
18: SDA (i2c) - clock gen also on here (V2 FIX only)
19: SCL (i2c) - clock gen also on here (V2 FIX only)
20-22: GND
23-34: 3.3V
25-26: 5.0V

Interface 1:
All level shifted to 3.3V.
Special pins:
37:RD4: 10k pulldown
40:RD5: 10k pulldown
34:MPD_N: 4.7k pullup to 5V
28:IRQ_N: 4.7k pullup to 5V
32:REF_N: 2k pullup to 5V (V2 FIX 2k, V2 4.7k)

Interface 2:
1-3: USB to FTDI
4: GND
5,6: 5V
7-10: Charge cap, FPGA compares with ref voltage
11-30: level shifted to 3.3V. 4.7k pullup to 5V. Direction pins have extra 220 ohm resistance (needed?)
31: GND
32-33: level shifted to 3.3V. 4.7k pullup to 5V
34: 5V transistor drive (for tape motor)
35-49: level shifted to 3.3V. 4.7k pullup o 5V
40: EXTSEL_N: level shifted to 3.3V. 4.7k pullup to 5V