2 pcboot - bootable PC demo/game kernel
3 Copyright (C) 2018 John Tsiombikas <nuclear@member.fsf.org>
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation, either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY, without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <https://www.gnu.org/licenses/>.
24 uint32_t edi, esi, ebp, esp;
25 uint32_t ebx, edx, ecx, eax;
27 uint16_t es, ds, fs, gs;
28 } __attribute__ ((packed));
30 #define FLAGS_CARRY 0x0001
31 #define FLAGS_PARITY 0x0004
32 #define FLAGS_AUXC 0x0010
33 #define FLAGS_ZERO 0x0040
34 #define FLAGS_SIGN 0x0080
35 #define FLAGS_TRAP 0x0100
36 #define FLAGS_INTR 0x0200
37 #define FLAGS_DIR 0x0400
38 #define FLAGS_OVF 0x0800
39 #define FLAGS_SIOPL(x) (((uint16_t)(x) & 3) << 12)
40 #define FLAGS_GIOPL(x) (((x) >> 12) & 3)
41 #define FLAGS_NTASK 0x4000
43 void int86(int inum, struct int86regs *regs);