2.2 KiB
2.2 KiB
Table of Contents
Expansion Port
Sentinel 65X features an expansion port along one side of the mainboard PCB. This port, a male edge connnector, exposes the same pins as the [cartridge port](Cartridge Port.md), and is intended to connect to a buffered backplane accessory. The port also features test points for all the signals on the port.
As with the cartridge port, the expansion port exposes the full system bus, as well as several chip select signals which simplify the development of expansions.
Pinout
| Pin | Label | Label | Pin | |
|---|---|---|---|---|
| b1 | PHI2 | GND | a1 | |
| b2 | /RES | +3.3V | a2 | |
| b3 | A0 | A1 | a3 | |
| b4 | A2 | A3 | a4 | |
| b5 | A4 | A5 | a5 | |
| b6 | A6 | A7 | a6 | |
| b7 | A8 | A9 | a7 | |
| b8 | A10 | A11 | a8 | |
| b9 | A12 | A13 | a9 | |
| b10 | A14 | A15 | a10 | |
| b11 | A16 | A17 | a11 | |
| b12 | A18 | A19 | a12 | |
| b13 | A20 | A21 | a13 | |
| b14 | A22 | A23 | a14 | |
| b15 | D0 | D1 | a15 | |
| b16 | D2 | D3 | a16 | |
| b17 | D4 | D5 | a17 | |
| b18 | D6 | GND | a18 | |
| b19 | D7 | /WR | a19 | |
| b20 | /RD | /RAM1 | a20 | |
| b21 | /ROM1 | BE | a21 | |
| b22 | /CS6 | /CS7 | a22 | |
| b23 | /CS1 | RUN | a23 | |
| b24 | BA | /IRQ | a24 | |
| b25 | R/W | /VIRQ | a25 | |
| b26 | /CS0 | /NMI | a26 | |
| b27 | SNES_DATA0 | SCL | a27 | |
| b28 | SNES_DATA1 | SDA | a28 | |
| b29 | SNES_DATA2 | SNES_LATCH | a29 | |
| b30 | SNES_DATA3 | SNES_CLK | a30 | |
| b31 | /CART | +3.3V | a31 | |
| b32 | +5V | GND | a32 |