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149 lines
5.2 KiB
149 lines
5.2 KiB
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From hjd(brace)
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Intel Defined CPU Exception Table (see notes)
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Interrupt Function
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0 Divide by zero
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1 Single step
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2 Non-maskable (NMI)
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3 Breakpoint
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4 Overflow trap
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5 BOUND range exceeded (186,286,386)
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6 Invalid opcode (186,286,386)
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7 Coprocessor not available (286,386)
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8 Double fault exception (286,386)
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9 Coprocessor segment overrun (286,386)
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A Invalid task state segment (286,386)
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B Segment not present (286,386)
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C Stack exception (286,386)
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D General protection exception (286,386)
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E Page fault (286,386)
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F Reserved
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10 Coprocessor error (286,386)
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IBM PC Hardware Interrupt Table (in order of priority)
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IRQ# Interrupt Function
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IRQ0 8 timer (55ms intervals, 18.2 per second)
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IRQ1 9 keyboard service required
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IRQ2 A slave 8259 or EGA/VGA vertical retrace
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IRQ8 70 real time clock (AT,XT286,PS50+)
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IRQ9 71 software redirected to IRQ2 (AT,XT286,PS50+)
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IRQ10 72 reserved (AT,XT286,PS50+)
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IRQ11 73 reserved (AT,XT286,PS50+)
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IRQ12 74 mouse interrupt (PS50+)
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IRQ13 75 numeric coprocessor error (AT,XT286,PS50+)
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IRQ14 76 fixed disk controller (AT,XT286,PS50+)
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IRQ15 77 reserved (AT,XT286,PS50+)
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IRQ3 B COM2 or COM4 service required, (COM3-COM8 on MCA PS/2)
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IRQ4 C COM1 or COM3 service required
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IRQ5 D fixed disk or data request from LPT2
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IRQ6 E floppy disk service required
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IRQ7 F data request from LPT1 (unreliable on IBM mono)
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Interrupt Table as Implemented by System BIOS/DOS
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INT # Locus Function
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0 CPU divide by zero
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1 CPU single step
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2 CPU non-maskable
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3 CPU breakpoint
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4 CPU overflow trap
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5 BIOS print screen
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6 CPU Invalid opcode (186,286,386)
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7 CPU coprocessor not available (286,386)
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8 IRQ0 timer (55ms intervals, 18.21590 per second)
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9 IRQ1 keyboard service required (see INT 9)
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A IRQ2 slave 8259 or EGA/VGA vertical retrace
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B IRQ3 COM2 service required (PS/2 MCA COM3-COM8)
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C IRQ4 COM1 service required
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D IRQ5 fixed disk or data request from LPT2
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E IRQ6 floppy disk service required
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F IRQ7 data request from LPT1 (unreliable on IBM mono)
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10 BIOS video (see INT 10)
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11 BIOS Equipment determination (see INT 11)
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12 BIOS memory size (see INT 12)
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13 BIOS disk I/O service (see INT 13)
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14 BIOS serial communications (see INT 14)
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15 BIOS system services, cassette (see INT 15)
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16 BIOS keyboard services (see INT 16)
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17 BIOS parallel printer (see INT 17)
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18 BIOS ROM BASIC loader
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19 BIOS bootstrap loader (unreliable, see INT 19)
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1A BIOS time of day (see INT 1A)
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1B BIOS user defined ctrl-break handler (see INT 1B)
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1C BIOS user defined clock tick handler (see INT 1C)
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1D BIOS 6845 video parameter pointer
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1E BIOS diskette parameter pointer (base table)
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1F BIOS graphics character table
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20 DOS general program termination
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21 DOS function request services (see INT 21)
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22 DOS terminate address (see INT 22)
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23 DOS control break termination address (see INT 23)
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24 DOS critical error handler (see INT 24)
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25 DOS absolute disk read (see INT 25)
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26 DOS absolute disk write (see INT 26)
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27 DOS terminate and stay resident (see INT 27)
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28 DOS idle loop, issued by DOS when idle (see INT 28)
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29 DOS fast TTY console I/O (see INT 29)
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2A DOS critical section and NETBIOS (see INT 2A)
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2B DOS internal, simple IRET in DOS 2.0-5.0
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2C DOS internal, simple IRET in DOS 2.0-5.0
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2D DOS internal, simple IRET in DOS 2.0-5.0
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2E DOS exec command from base level command
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interpreter (see INT 2E)
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2F DOS multiplexer (see INT 2F)
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30-31 CPM far jump vector for CPM (not an interrupt)
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31 DPMI DOS Protected Mode Interface (for DOS extenders)
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32 reserved
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33 mouse support (see INT 33)
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34-3E Microsoft/Borland floating point emulation
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3F overlay manager
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40 BIOS hard disk
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41 BIOS fixed disk 0 parameters pointer (see INT 13,9)
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42 BIOS relocated video handler (EGA/VGA/PS)
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43 BIOS user font table (EGA/VGA/PS)
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44 BIOS first 128 graphics characters (also Netware)
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45 BIOS reserved for BIOS
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46 BIOS fixed disk 1 parameters ptr (see INT 13,9/INT 41)
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47 BIOS reserved for BIOS
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48 BIOS PCjr cordless keyboard translation
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49 BIOS PCjr non-keyboard scancode translation table
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4A BIOS user alarm (AT,CONV,PS/2) (see INT 4A)
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4B-4F BIOS reserved
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50 BIOS periodic alarm from timer (PS/2)
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51-58 BIOS reserved
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59 BIOS GSS Computer Graphics Interface
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5A BIOS cluster adapter BIOS entry point
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5B BIOS cluster adapter boot
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5C NETBIOS NETBIOS interface, TOPS interface
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5D-5F BIOS reserved for BIOS
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60-67 reserved for user software interrupts
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67 EMS LIM/EMS specification (see INT 67)
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68 APPC
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69-6B reserved by IBM
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6C DOS DOS 3.2 real time clock update
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BIOS system resume vector
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6D-6F reserved
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70 IRQ8 real time clock (AT,XT286,PS50+, see INT 15)
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71 IRQ9 software redirected to IRQ2 (AT,XT286,PS50+)
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72 IRQ10 reserved (AT,XT286,PS50+)
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73 IRQ11 reserved (AT,XT286,PS50+)
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74 IRQ12 mouse interrupt (PS50+)
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75 IRQ13 numeric coprocessor NMI error (AT,XT286,PS50+)
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76 IRQ14 fixed disk controller (AT,XT286,PS50+)
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77 IRQ15 reserved (AT,XT286,PS50+)
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78-79 unused
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80-85 ROM BASIC
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86-F0 DOS reserved for BASIC interpreter use
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86 NETBIOS NETBIOS relocated INT 18
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E0 CPM CP/M 86 function calls
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F1-FF reserved by IBM
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FE-FF may be destroyed by return from protected
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mode using VDISK on 286 machines (Apr 86, DDJ)
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