Implement serial IO, a generic serial device type and external interrupts

1 files changed, 15 insertions, 1 deletions

diff --git a/io.h b/io.h
index 23affc7..00f1528 100644
--- a/io.h
+++ b/io.h
@@ -24,7 +24,8 @@ enum {
 	IO_EA_MULTI_A,
 	IO_EA_MULTI_B,
 	IO_SEGA_PARALLEL,
-	IO_GENERIC
+	IO_GENERIC,
+	IO_GENERIC_SERIAL
 };
 
 typedef struct {
@@ -62,8 +63,15 @@ typedef struct {
 	uint8_t  control;
 	uint8_t  input[3];
 	uint32_t slow_rise_start[8];
+	uint32_t serial_cycle;
+	uint32_t serial_divider;
+	uint32_t last_poll_cycle;
+	uint32_t transmit_end;
+	uint32_t receive_end;
 	uint8_t  serial_out;
+	uint8_t  serial_transmitting;
 	uint8_t  serial_in;
+	uint8_t  serial_receiving;
 	uint8_t  serial_ctrl;
 	uint8_t  device_type;
 } io_port;
@@ -106,9 +114,15 @@ enum {
 
 void setup_io_devices(tern_node * config, rom_info *rom, sega_io *io);
 void io_adjust_cycles(io_port * pad, uint32_t current_cycle, uint32_t deduction);
+void io_run(io_port *port, uint32_t current_cycle);
 void io_control_write(io_port *port, uint8_t value, uint32_t current_cycle);
 void io_data_write(io_port * pad, uint8_t value, uint32_t current_cycle);
+void io_tx_write(io_port *port, uint8_t value, uint32_t current_cycle);
+void io_sctrl_write(io_port *port, uint8_t value, uint32_t current_cycle);
 uint8_t io_data_read(io_port * pad, uint32_t current_cycle);
+uint8_t io_rx_read(io_port * port, uint32_t current_cycle);
+uint8_t io_sctrl_read(io_port *port, uint32_t current_cycle);
+uint32_t io_next_interrupt(io_port *port, uint32_t current_cycle);
 void io_serialize(io_port *port, serialize_buffer *buf);
 void io_deserialize(deserialize_buffer *buf, void *vport);