NEO-F0

NEO-F0 chip found on a MV1S MVS board.

MVS specific chip.

Handles the RTC access, hardware DIPs reading, cab switches (test, service...), coin counters, LED and marquee outputs, and slot selection signals for multi-slot boards.

SYSTEMB is used to gate the SLOT* outputs.

Pinout

File:Neo-f0 pinout.png

OpenOffice Draw file: File:Neo-f0.odg

Signals

CPU

• A4~A7: 68k address bus
• D0~D7: 68k data bus

RTC

4990*: uPD4990 RTC interface

IN3 DIPRD1: Output IN300~IN304 to D0~D4 and CALTP/CALDOUT to D6/D7 (read $320001)

I/O

DIPRD0: Output to D0~D7 depending on state of A7:

• A7 low: output dipswitch states DIP00~DIP07 (read $300001)
• A7 high: output IN01 to D7 (test switch) and TYPE to D6 (read $300081)

Slot select

• SLOTA~SLOTC: binary slot selection
• SLOT0~SLOT5: decoded slot selection (active low)

Connections

MV1F:

• IN00: Ground
• IN01: Test switch
• IN300: P1 Coin switch
• IN301: P2 Coin switch
• IN302: Service switch
• IN303/IN304: VCC

MV2B:

• IN303: NEO-E0 H6 50 (BNK0)
• IN304: 3 of PRO-C0, NEO-E0 H6 48