d1a58876e7
platform/hal_dos.c: DOS HAL implementation using BIOS INT 10h for screen/cursor, INT 16h for keyboard, direct character output via BIOS write-char. Compile-time selection via __MSDOS__ define. Linux HAL (hal_posix.c) unchanged -- full backward compatibility. hal.h: add hal_dos_create() declaration under __MSDOS__ guard. main.c, gwrt.c: select HAL at compile time via #ifdef __MSDOS__. Makefile.dos: OpenWatcom wmake build file targeting DOS/4GW 32-bit. Builds GWBASIC.EXE (interpreter), GWBASCOM.EXE (compiler), GWRT.LIB (runtime library for compiled programs). All 72 interpreter, 14 kernel, and 69 compiler tests continue to pass on Linux (no regression).
46 lines
1.0 KiB
C
46 lines
1.0 KiB
C
#ifndef GW_HAL_H
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#define GW_HAL_H
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#include <stdint.h>
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#include <stdbool.h>
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/* Hardware Abstraction Layer vtable */
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typedef struct hal_ops {
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/* Terminal I/O */
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void (*putch)(int ch);
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void (*puts)(const char *s);
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int (*getch)(void); /* blocking read */
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bool (*kbhit)(void); /* key available? */
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void (*locate)(int row, int col);
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int (*get_cursor_row)(void);
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int (*get_cursor_col)(void);
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void (*cls)(void);
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void (*set_width)(int cols);
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/* Raw mode for INKEY$/INPUT$ */
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void (*enable_raw)(void);
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void (*disable_raw)(void);
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/* Write raw bytes bypassing cursor tracking (for Sixel, etc.) */
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void (*write_raw)(const char *data, int len);
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/* Terminal properties */
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int screen_width;
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int screen_height;
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bool is_tty;
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/* Lifecycle */
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void (*init)(void);
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void (*shutdown)(void);
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} hal_ops_t;
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extern hal_ops_t *gw_hal;
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/* Platform implementations */
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hal_ops_t *hal_posix_create(void);
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#ifdef __MSDOS__
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hal_ops_t *hal_dos_create(void);
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#endif
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#endif
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