NEO-F0
MVS specific chip.
Handles the UPD4990 calendar access, dipswitches, cab switches (test, service...), coin counters, LED marquee outputs and slot selection signals for multi-slot boards.
SYSTEMB is used as an input to gate the SLOT* pins.
To do: D0~7 are bidir.
Pinout
OpenOffice Draw file: File:Neo-f0.odg
- A4~A7: 68k address bus
- D0~D7: 68k data bus
- 4990*: uPD4990 RTC interface
- DATA0~DATA7: LED marquee latch data output
- DIP00~DIP07: Dipswitch inputs
- IN3: Output IN300~IN304 to D0~D4 and CALTP/CALDOUT to D6/D7 (read $320001)
- DIPRD: 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)
- BITWD0: writes to $3800x1 region...(fill in)
- SLOTA~SLOTC: binary slot selection
- SLOT0~SLOT5: decoded slot selection
MV1F:
- IN00: Ground
- IN01: Test switch
- IN300: P1 Coin switch
- IN301: P2 Coin switch
- IN302: Service switch
- IN303/IN304: VCC
MV2B:
- IN304: 3 of PRO-C0, NEO-E0 H6 48
- IN303: NEO-E0 H6 50 (BNK0)