diff options
Diffstat (limited to 'inc/dosapi.h')
| -rw-r--r-- | inc/dosapi.h | 182 |
1 files changed, 0 insertions, 182 deletions
diff --git a/inc/dosapi.h b/inc/dosapi.h deleted file mode 100644 index 18dbde0..0000000 --- a/inc/dosapi.h +++ /dev/null @@ -1,182 +0,0 @@ -/* - * VBMouse - Interface to some DOS int 21h services - * Copyright (C) 2022 Javier S. Pedro - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License - * as published by the Free Software Foundation; either version 2 - * of the License, or (at your option) any later version. - - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. - */ - -#ifndef INT21DOS_H -#define INT21DOS_H - -#include <stddef.h> -#include <stdbool.h> -#include <stdint.h> -#include <dos.h> -#include "sassert.h" - -#define DOS_PSP_SIZE 256 - -enum dos_error { - DOS_ERROR_SUCCESS = 0, - DOS_ERROR_INVALID_FUNCTION = 1, - DOS_ERROR_FILE_NOT_FOUND = 2, - DOS_ERROR_PATH_NOT_FOUND = 3, - DOS_ERROR_TOO_MANY_OPEN_FILES = 4, - DOS_ERROR_ACCESS_DENIED = 5, - DOS_ERROR_INVALID_HANDLE = 6, - DOS_ERROR_ARENA_TRASHED = 7, - DOS_ERROR_NOT_ENOUGH_MEMORY = 8, - DOS_ERROR_INVALID_BLOCK = 9, - DOS_ERROR_BAD_ENVIRONMENT = 10, - DOS_ERROR_BAD_FORMAT = 11, - DOS_ERROR_INVALID_ACCESS = 12, - DOS_ERROR_INVALID_DATA = 13, - DOS_ERROR_OUT_OF_MEMORY = 14, - DOS_ERROR_INVALID_DRIVE = 15, - DOS_ERROR_CURRENT_DIRECTORY = 16, - DOS_ERROR_NOT_SAME_DEVICE = 17, - DOS_ERROR_NO_MORE_FILES = 18, - DOS_ERROR_WRITE_PROTECT = 19, - DOS_ERROR_BAD_UNIT = 20, - DOS_ERROR_NOT_READY = 21, - DOS_ERROR_BAD_COMMAND = 22, - DOS_ERROR_CRC = 23, - DOS_ERROR_BAD_LENGTH = 24, - DOS_ERROR_SEEK = 25, - DOS_ERROR_NOT_DOS_DISK = 26, - DOS_ERROR_SECTOR_NOT_FOUND = 27, - - DOS_ERROR_GEN_FAILURE = 31, - - DOS_ERROR_HANDLE_EOF = 38, - DOS_ERROR_HANDLE_DISK_FULL = 39, - - DOS_ERROR_FILE_EXISTS = 80, - DOS_ERROR_CANNOT_MAKE = 82, -}; - -// General functions - -static inline void dos_print_char(char c); -#pragma aux dos_print_char = \ - "mov ah, 0x02" \ - "int 0x21" \ - __parm [dl] \ - __modify [ah] - -static inline uint8_t dos_read_char(void); -#pragma aux dos_read_char = \ - "mov ah, 0x08" \ - "int 0x21" \ - __value [al] \ - __modify [ax] - -static inline void dos_print_string(const char *s); -#pragma aux dos_print_string = \ - "mov ah, 0x09" \ - "int 0x21" \ - __parm [dx] \ - __modify [ah] - -static inline uint16_t dos_get_version(void); -#pragma aux dos_get_version = \ - "mov ah, 0x30" \ - "int 0x21" \ - __value [ax] \ - __modify [bx cx] - -// Memory manipulation functions - -typedef __segment segment_t; - -enum dos_allocation_strategy { - DOS_FIT_FIRST = 0, - DOS_FIT_BEST = 1, - DOS_FIT_LAST = 2, - - DOS_FIT_HIGH = 0x80, - DOS_FIT_HIGHONLY = 0x40, -}; - -/** Converts bytes to paragraphs (16 bytes), rounding up. */ -static inline unsigned get_paragraphs(unsigned bytes) -{ - return (bytes + 15) / 16; -} - -static unsigned dos_query_allocation_strategy(void); -#pragma aux dos_query_allocation_strategy = \ - "mov ax, 0x5800" \ - "int 0x21" \ - __value [ax] - -static int dos_set_allocation_strategy(unsigned strategy); -#pragma aux dos_set_allocation_strategy = \ - "clc" \ - "mov ax, 0x5801" \ - "int 0x21" \ - "jc end" \ - "mov ax, 0" \ - "end:" \ - __parm [bx] \ - __value [ax] - -static bool dos_query_umb_link_state(void); -#pragma aux dos_query_umb_link_state = \ - "mov ax, 0x5802" \ - "int 0x21" \ - __value [al] - -static int dos_set_umb_link_state(bool state); -#pragma aux dos_set_umb_link_state = \ - "clc" \ - "mov ax, 0x5803" \ - "int 0x21" \ - "jc end" \ - "mov ax, 0" \ - "end:" \ - __parm [bx] \ - __value [ax] - -/** Allocates a new DOS segment. - * @returns either the allocated segment or 0 if any error. */ -static __segment dos_alloc(unsigned paragraphs); -#pragma aux dos_alloc = \ - "clc" \ - "mov ah, 0x48" \ - "int 0x21" \ - "jnc end" \ - "mov ax, 0xB" \ - "end:" \ - __parm [bx] \ - __value [ax] - -/** Frees DOS segment. */ -static void dos_free(segment_t segment); -#pragma aux dos_free = \ - "mov ah, 0x49" \ - "int 0x21" \ - __parm [es] \ - __modify [ax] - -/** Sets a given PSP as the current active process. */ -static void dos_set_psp(segment_t psp); -#pragma aux dos_set_psp = \ - "mov ah, 0x50" \ - "int 0x21" \ - __parm [bx] \ - __modify [ax] - -#endif // INT21DOS_H |