Mercurial > repos > blastem
diff io.h @ 2025:e7a516f08cec
Implement serial IO, a generic serial device type and external interrupts
| author | Michael Pavone <pavone@retrodev.com> |
|---|---|
| date | Wed, 10 Feb 2021 20:12:16 -0800 |
| parents | d6c403135e64 |
| children | 0f54a898db03 |
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--- a/io.h Tue Nov 24 23:15:25 2020 -0800 +++ b/io.h Wed Feb 10 20:12:16 2021 -0800 @@ -24,7 +24,8 @@ IO_EA_MULTI_A, IO_EA_MULTI_B, IO_SEGA_PARALLEL, - IO_GENERIC + IO_GENERIC, + IO_GENERIC_SERIAL }; typedef struct { @@ -62,8 +63,15 @@ 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 @@ 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);