105 lines
2.9 KiB
C
105 lines
2.9 KiB
C
/*
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* 86Box A hypervisor and IBM PC system emulator that specializes in
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* running old operating systems and software designed for IBM
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* PC systems and compatibles from 1981 through fairly recent
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* system designs based on the PCI bus.
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*
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* This file is part of the 86Box distribution.
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*
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* Definitions for the NS8250/16450/16550/16650/16750/16850/16950
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* UART emulation.
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*
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*
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*
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* Author: Sarah Walker, <http://pcem-emulator.co.uk/>
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* Miran Grca, <mgrca8@gmail.com>
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* Fred N. van Kempen, <decwiz@yahoo.com>
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*
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* Copyright 2008-2020 Sarah Walker.
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* Copyright 2016-2020 Miran Grca.
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* Copyright 2017-2020 Fred N. van Kempen.
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*/
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#ifndef EMU_SERIAL_H
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# define EMU_SERIAL_H
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#define SERIAL_8250 0
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#define SERIAL_8250_PCJR 1
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#define SERIAL_16450 2
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#define SERIAL_16550 3
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#define SERIAL_16650 4
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#define SERIAL_16750 5
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#define SERIAL_16850 6
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#define SERIAL_16950 7
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#define SERIAL_FIFO_SIZE 16
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/* Default settings for the standard ports. */
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#define COM1_ADDR 0x03f8
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#define COM1_IRQ 4
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#define COM2_ADDR 0x02f8
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#define COM2_IRQ 3
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#define COM3_ADDR 0x03e8
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#define COM3_IRQ 4
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#define COM4_ADDR 0x02e8
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#define COM4_IRQ 3
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struct serial_device_s;
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struct serial_s;
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typedef struct serial_s
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{
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uint8_t lsr, thr, mctrl, rcr,
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iir, ier, lcr, msr,
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dat, int_status, scratch, fcr,
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irq, type, inst, transmit_enabled,
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fifo_enabled, rcvr_fifo_len, bits, data_bits,
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baud_cycles, rcvr_fifo_full, txsr, pad;
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uint16_t dlab, base_address;
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uint8_t rcvr_fifo_pos, xmit_fifo_pos,
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pad0, pad1,
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rcvr_fifo[SERIAL_FIFO_SIZE], xmit_fifo[SERIAL_FIFO_SIZE];
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pc_timer_t transmit_timer, timeout_timer;
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double clock_src, transmit_period;
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struct serial_device_s *sd;
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} serial_t;
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typedef struct serial_device_s
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{
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void (*rcr_callback)(struct serial_s *serial, void *p);
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void (*dev_write)(struct serial_s *serial, void *p, uint8_t data);
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void *priv;
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serial_t *serial;
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} serial_device_t;
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extern serial_t * serial_attach(int port,
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void (*rcr_callback)(struct serial_s *serial, void *p),
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void (*dev_write)(struct serial_s *serial, void *p, uint8_t data),
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void *priv);
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extern void serial_remove(serial_t *dev);
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extern void serial_set_type(serial_t *dev, int type);
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extern void serial_setup(serial_t *dev, uint16_t addr, uint8_t irq);
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extern void serial_clear_fifo(serial_t *dev);
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extern void serial_write_fifo(serial_t *dev, uint8_t dat);
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extern void serial_set_next_inst(int ni);
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extern void serial_standalone_init(void);
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extern void serial_set_clock_src(serial_t *dev, double clock_src);
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extern void serial_reset_port(serial_t *dev);
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extern const device_t ns8250_device;
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extern const device_t ns8250_pcjr_device;
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extern const device_t ns16450_device;
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extern const device_t ns16550_device;
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extern const device_t ns16650_device;
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extern const device_t ns16750_device;
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extern const device_t ns16850_device;
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extern const device_t ns16950_device;
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#endif /*EMU_SERIAL_H*/
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