The VME Universal I/O Transition board provides additional inputs and outputs for the VME Event Generator and VME Event Receiver Boards. Up to eight Universal I/O Modules can be mounted. The EVG supports input modules only whereas the EVR can utilise output modules only. The transition board itself can be used for both the EVG and EVR.
VME Universal I/O Transition Board
I/O mapping of Universal I/O transition board
| Universal I/O | P2 input pin | P2 output pin | EVG input | EVR output |
| UNIV0 | C1 | C12 | Ext. event trig 0 | OTP0/DBUS0 |
| UNIV1 | C2 | C13 | Ext. event trig 1 | OTP1/DBUS1 |
| UNIV2 | C3 | C14 | Ext. event trig 2 | OTP2/DBUS2 |
| UNIV3 | C4 | C15 | Ext. event trig 3 | OTP3/DBUS3 |
| UNIV4 | C5 | C16 | Ext. event trig 4 | OTP4/DBUS4 |
| UNIV5 | C6 | C17 | Ext. event trig 5 | OTP5/DBUS5 |
| UNIV6 | C7 | C18 | Ext. event trig 6 | OTP6/DBUS6 |
| UNIV7 | C8 | C19 | Ext. event trig 7 | OTP7/DBUS7 |
| UNIV8 | C9 | C20 | SeqRAM 1 clk | OTP8 |
| UNIV9 | C10 | C21 | SeqRAM 1 trig | OTP9 |
| UNIV10 | C11 | C22 | SeqRAM 1 reset | OTP10 |
| UNIV11 | C28 | C23 | DBUS3 | OTP11 |
| UNIV12 | C29 | C24 | DBUS4 / TS clk | OTP12 |
| UNIV13 | C30 | C25 | DBUS5 / TS reset | OTP13 |
| UNIV14 | C31 | C26 | DBUS6 / TS ‘0’ | OTL0 |
| UNIV15 | C32 | C27 | DBUS7 / TS ‘1’ | OTL1 |