NEO-I0
| |
| Package | QFP64R |
| Manufacturer | 
|
| First use | 1990 ? |
| Used on | MV2B ... |
MVS specific chip that does a bunch of unrelated things.
- S ROM 16bit address latch for the SFIX ROM, same as S ROM portion of NEO-273
- SM1 /CS output when Z80 is reading from ROM and onboard ROMs are enabled
- ROMOE output for cartridge(s) PROG board
- Video sync inversion (or not) to JAMMA connector
- Coin counter and coin lockout outputs
Pinout
- A0~A3,A7: 68k address bus
- P0~P15: P bus
- Q01~Q18: SFIX ROM address lines
- SM1CS(ORO0): SM1 ROM chip select, made from SYSTEM(ORI0) OR SDROM(ORI1)
- SYNCOUT = SYNCIN XOR SYNCREV (SYNCREV always tied to ground ?)
- Q21, Q22: METER1, METER2
- Q23, Q24: LOCK1, LOCK2
- DS0, DS1: Data select for 2-slot systems made from SLOT0, SLOT1, PORTADRS and ROMOE, goes to a NEO-G0
- COUNTOUT: Address decode from NEO-F0