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LPT ECP/EPP support

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Co-Authored-By: Miran Grča <oubattler@gmail.com>
This commit is contained in:
Jasmine Iwanek
2025-06-24 01:23:32 -04:00
parent 6a8eaf507c
commit 58aa261273
13 changed files with 1161 additions and 392 deletions
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59
src/include/86box/lpt.h
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@@ -25,14 +25,24 @@ typedef struct lpt_device_t {
void (*close)(void *priv);
void (*write_data)(uint8_t val, void *priv);
void (*write_ctrl)(uint8_t val, void *priv);
uint8_t (*read_data)(void *priv);
void (*autofeed)(uint8_t val,void *priv);
void (*strobe)(uint8_t old, uint8_t val,void *priv);
uint8_t (*read_status)(void *priv);
uint8_t (*read_ctrl)(void *priv);
void (*epp_write_data)(uint8_t is_addr, uint8_t val, void *priv);
void (*epp_request_read)(uint8_t is_addr, void *priv);
} lpt_device_t;
extern void lpt_set_ext(int port, uint8_t ext);
extern void lpt_set_ecp(int port, uint8_t ecp);
extern void lpt_set_epp(int port, uint8_t epp);
extern void lpt_set_lv2(int port, uint8_t lv2);
extern void lpt_reset(void);
extern void lpt_close(void);
extern void lpt_init(void);
extern void lpt_port_setup(int i, uint16_t port);
extern void lpt_port_irq(int i, uint8_t irq);
extern void lpt_port_dma(int i, uint8_t dma);
extern void lpt_port_remove(int i);
extern void lpt1_remove_ams(void);
@@ -68,31 +78,62 @@ void lpt_devices_close(void);
typedef struct lpt_port_t {
uint8_t enabled;
uint8_t irq;
uint8_t irq_state;
uint8_t dma;
uint8_t dat;
uint8_t ctrl;
uint8_t ext;
uint8_t epp;
uint8_t ecp;
uint8_t ecr;
uint8_t in_dat;
uint8_t fifo_stat;
uint8_t dma_stat;
uint8_t state;
uint8_t autofeed;
uint8_t strobe;
uint8_t lv2;
uint8_t pad[7];
uint16_t addr;
uint16_t pad0;
uint16_t id;
uint16_t pad0[2];
int device;
int enable_irq;
lpt_device_t *dt;
#ifdef FIFO_H
fifo16_t *fifo;
#else
void *fifo;
#endif
void *priv;
pc_timer_t fifo_out_timer;
} lpt_port_t;
typedef enum {
LPT_STATE_IDLE = 0,
LPT_STATE_READ_DMA,
LPT_STATE_WRITE_FIFO
} lpt_state_t;
extern lpt_port_t lpt_ports[PARALLEL_MAX];
extern void lpt_write(uint16_t port, uint8_t val, void *priv);
extern uint8_t lpt_read(uint16_t port, void *priv);
extern void lpt_write(uint16_t port, uint8_t val, void *priv);
extern uint8_t lpt_read_port(int port, uint16_t reg);
extern void lpt_write_to_fifo(void *priv, uint8_t val);
extern uint8_t lpt_read_status(int port);
extern void lpt_irq(void *priv, int raise);
extern uint8_t lpt_read(uint16_t port, void *priv);
extern uint8_t lpt_read_port(int port, uint16_t reg);
extern uint8_t lpt_read_status(int port);
extern void lpt_irq(void *priv, int raise);
extern int lpt_device_get_from_internal_name(const char *s);
extern const char *lpt_device_get_name(int id);
extern const char *lpt_device_get_internal_name(int id);
extern int lpt_device_get_from_internal_name(char *s);
extern const lpt_device_t lpt_dac_device;
extern const lpt_device_t lpt_dac_stereo_device;