📄 qemu_ioport.txt
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bit 0 right button pressed byte 1: resolution ED dbl set/reset mode indicators Caps Num Scrl bit 2 = CapsLk, bit 1 = NumLk, bit 0 = ScrlLk EE sngl diagnostic echo. returns EE. EF sngl NOP (No OPeration). reserved for future use F0 dbl get/set scan code set 00h get current set 01h scancode set 1 (except Type 2 ctrlr) 02h scancode set 2 (default) 03h scancode set 3 F2 sngl read keyboard ID (read two ID bytes) F2 sngl read mouse ID (read two ID bytes) F3 dbl set typematic rate/delay F3 dbl set mouse sample rate in reports per second F4 sngl enable keyboard F4 sngl enable mouse F5 sngl disable keyboard. set default parameters F5 sngl disable mouse, set default parameters F6 sngl set default parameters F7 sngl [MCA] set all keys to typematic (scancode set 3) F8 sngl [MCA] set all keys to make/release F9 sngl [MCA] set all keys to make only FA sngl [MCA] set all keys to typematic/make/release FB sngl [MCA] set al keys to typematic FC dbl [MCA] set specific key to make/release FD dbl [MCA] set specific key to make only FE sngl resend last scancode FF sngl perform internal power-on reset function FF sngl reset mouse Note: must issue command D4h to port 64h first to access mouse functions0060 r KeyBoard or KB controller data output buffer (via PPI on XT)0061 w KB controller port B (ISA, EISA) (PS/2 port A is at 0092) system control port for compatibility with 8255 bit 7 (1= IRQ 0 reset ) bit 6-4 reserved bit 3 = 1 channel check enable bit 2 = 1 parity check enable bit 1 = 1 speaker data enable bit 0 = 1 timer 2 gate to speaker enable0061 r KB controller port B control register (ISA, EISA) system control port for compatibility with 8255 bit 7 parity check occurred bit 6 channel check occurred bit 5 mirrors timer 2 output condition bit 4 toggles with each refresh request bit 3 channel check status bit 2 parity check status bit 1 speaker data status bit 0 timer 2 gate to speaker status0061 w PPI Programmable Peripheral Interface 8255 (XT only) system control port bit 7 = 1 clear keyboard bit 6 = 0 hold keyboard clock low bit 5 = 0 I/O check enable bit 4 = 0 RAM parity check enable bit 3 = 0 read low switches bit 2 reserved, often used as turbo switch bit 1 = 1 speaker data enable bit 0 = 1 timer 2 gate to speaker enable0062 r/w PPI (XT only) bit 7 = 1 RAM parity check bit 6 = 1 I/O channel check bit 5 = 1 timer 2 channel out bit 4 reserved bit 3 = 1 system board RAM size type 1 bit 2 = 1 system board RAM size type 2 bit 1 = 1 coprocessor installed bit 0 = 1 loop in POST0063 r/w PPI (XT only) command mode register (read dipswitches) bit 7-6 = 00 1 diskette drive = 01 2 diskette drives = 10 3 diskette drives = 11 4 diskette drives bit 5-4 = 00 reserved = 01 40*25 color (mono mode) = 10 80*25 color (mono mode) = 11 MDA 80*25 bit 3-2 = 00 256K (using 256K chips) = 01 512K (using 256K chips) = 10 576K (using 256K chips) = 11 640K (using 256K chips) bit 3-2 = 00 64K (using 64K chips) = 01 128K (using 64K chips) = 10 192K (using 64K chips) = 11 256K (using 64K chips) bit 1-0 reserved0064 r KB controller read status (ISA, EISA) bit 7 = 1 parity error on transmission from keyboard bit 6 = 1 receive timeout bit 5 = 1 transmit timeout bit 4 = 0 keyboard inhibit bit 3 = 1 data in input register is command 0 data in input register is data bit 2 system flag status: 0=power up or reset 1=selftest OK bit 1 = 1 input buffer full (input 60/64 has data for 8042) bit 0 = 1 output buffer full (output 60 has data for system)0064 r KB controller read status (MCA) bit 7 = 1 parity error on transmission from keyboard bit 6 = 1 general timeout bit 5 = 1 mouse output buffer full bit 4 = 0 keyboard inhibit bit 3 = 1 data in input register is command 0 data in input register is data bit 2 system flag status: 0=power up or reset 1=selftest OK bit 1 = 1 input buffer full (input 60/64 has data for 804x) bit 0 = 1 output buffer full (output 60 has data for system)0064 r KB controller read status by Compaq bit 7 = 1 parity error detected (11-bit format only). If an error is detected, a Resend command is sent to the keyboard once only, as an attempt to recover. bit 6 = 1 receive timeout. transmission didn't finish in 2mS. bit 5 = 1 transmission timeout error bit 5,6,7 cause 1 0 0 No clock 1 1 0 Clock OK, no response 1 0 1 Clock OK, parity error bit 4 = 0 security lock engaged bit 3 = 1 data in OUTPUT register is command 0 data in OUTPUT register is data bit 2 system flag status: 0=power up or reset 1=soft reset bit 1 = 1 input buffer full (output 60/64 has data) bit 0 = 0 no new data in buffer (input 60 has data)0064 w KB controller input buffer (ISA, EISA) KB controller commands (data goes to port 0060): 20 read read byte zero of internal RAM, this is the last KB command send to 804x Compaq Put current command byte on port 0060 command structure: bit 7 reserved bit 6 = 1 convert KB codes to 8086 scan codes bit 5 = 0 use 11-bit codes, 1=use 8086 codes bit 4 = 0 enable keyboard, 1=disable keyboard bit 3 = 1 ignore security lock state bit 2 this bit goes into bit2 status reg. bit 1 = 0 reserved bit 0 = 1 generate int. when output buffer full 21-3F read reads the byte specified in the lower 5 bits of the command in the 804x's internal RAM 60-7F dbl writes the data byte to the address specified in the 5 lower bits of the command. Alternate description KB IO command 60 summary: bit7 = 0 reserved bit6 = IBM PC compatibility mode bit5 = IBM PC mode bit4 = disable kb bit3 = inhibit override bit2 = system flag bit1 = 0 reserved bit0 = enableoutput buffer full interrupt 60 Compaq Load new command (60 to [64], command to [60]) A1 Compaq unknown speedfunction ?? A2 Compaq unknown speedfunction ?? A3 Compaq Enable system speed control A4 MCA check if password installed A4 Compaq Toggle speed A5 MCA load password A5 Compaq Special reed. the 8042 places the real values of port 2 except for bits 4 and 5 wich are given a new definition in the output buffer. No output buffer full is generated. if bit 5 = 0, a 9-bit keyboard is in use if bit 5 = 1, an 11-bit keyboard is in use if bit 4 = 0, outp-buff-full interrupt disabled if bit 4 = 1, output-buffer-full int. enabled A6 MCA check password A6 Compaq unknown speedfunction ?? A7 MCA disable mouse port A8 MCA enable mouse port A9 MCA test mouse port AA sngl initiate self-test. will return 55 to data port Compaq Initializes ports 1 and 2, disables the keyboard and clears the buffer pointers. It then places 55 in the output buffer. AB sngl initiate interface test. result values: 0 = no error 1 = keyboard clock line stuck low 2 = keyboard clock line stuck high 3 = keyboard data line is stuck low 4 = keyboard data line stuck high Compaq 5 = Compaq diagnostic feature AC read diagnostic dump. the contents of the 804x RAM, output port, input port, status word are send. AD sngl disable keyboard (sets bit 4 of commmand byte) AE sngl enable keyboard (resets bit 4 of commmand byte) AF AWARD Enhanced Command: read keyboard version C0 read read input port Compaq Places status of input port in output buffer. use this command only when the output buffer is empty C1 MCA Enhanced Command: poll input port Low nibble C2 MCA Enhanced Command: poll input port High nibble D0 read read output port Compaq Places byte in output port in output buffer. use this command only when the output buffer is empty D1 dbl write output port. next byte written to 0060 will be written to the 804x output port; the original IBM AT and many compatibles use bit 1 of the output port to control the A20 gate. Compaq The system speed bits are not set by this command use commands A1-A6 (!) for speed functions. D2 MCA Enhanced Command: write keyboard output buffer D3 MCA Enhanced Command: write pointing device out.buf. D4 MCA write to mouse D4 AWARD Enhanced Command: write to auxiliary device DD sngl disable address line A20 (HP Vectra only???) default in Real Mode DF sngl enable address line A20 (HP Vectra only???) E0 read read test inputs. bit0 = kbd clock, bit1 = kbd data Exxx AWARD Enhanced Command: active output port ED Compaq This is a two part command to control the state of the NumLock CpasLock and ScrollLock LEDs The second byte contains the state to set LEDs. bit 7-3 reserved. should be set to 0. bit 2 = 0 Caps Lock LED off bit 1 = 0 Num Lock LED off bit 0 = 0 Scroll Lock LED off F0-FF sngl pulse output port low for 6 microseconds. bits 0-3 contain the mask for the bits to be pulsed. a bit is pulsed if its mask bit is zero. bit0=system reset. Don't set to zero. Pulse only!general note: Keyboard controllers are widely different from each other. You cannot generally exchange them between different machines.note on Award: Derived from Award's Enhanced KB controller advertising sheet.note on Compaq: Derived from the Compaq Deskpro 386 Tech. Ref. Guide.0065 r communications port (Olivetti M24)0068 w HP-Vectra control buffer (HP commands)0069 r HP-Vectra SVC (keyboard request SerViCe port)006A w HP-Vectra clear processing, done006C-006F HP-HIL (Human Interface Link = async. serial inputs 0-7)-------------------------------------------------------------------------------0065 ---- AT&T 6300+ high/low chip select-------------------------------------------------------------------------------0065 ---- ???0065 r/w ??? bit 2: A20 gate control (set = A20 enabled, clear = disabled)-------------------------------------------------------------------------------0066-0067 ---- AT&T 6300+ system configuration switches-------------------------------------------------------------------------------0068 ---- C&T chipsets, turbo mode control-------------------------------------------------------------------------------006B-006F ---- SSGA control registers006B ? RAM enable/remap006C-006F undocumented-------------------------------------------------------------------------------0070-007F ---- CMOS RAM/RTC (Real Time Clock MC146818)0070 w CMOS RAM index register port (ISA, EISA) bit 7 = 1 NMI disabled = 0 NMI enabled bit 6-0 CMOS RAM index (64 bytes, sometimes 128 bytes) any write to 0070 should be followed by an action to 0071 or the RTC wil be left in an unknown state.0071 r/w CMOS RAM data port (ISA, EISA) RTC registers: 00 current second in BCD 01 alarm second in BCD 02 current minute in BCD 03 alarm minute in BCD 04 current hour in BCD 05 alarm hour in BCD 06 day of week in BCD 07 day of month in BCD 08 month in BCD 09 year in BCD (00-99) 0A status register A bit 7 = 1 update in progress bit 6-4 divider that identifies the time-based frequency bit 3-0 rate selection output frequency and int. rate 0B status register B bit 7 = 0 run = 1 halt bit 6 = 1 enable periodic interrupt bit 5 = 1 enable alarm interrupt bit 4 = 1 enable update-ended interrupt bit 3 = 1 enable square wave interrupt bit 2 = 1 calendar is in binary format = 0 calendar is in BCD format bit 1 = 1 24-hour mode = 0 12-hour mode bit 0 = 1 enable daylight savings time. only in USA. useless in Europe. Some DOS versions clear this bit when you use the DAT/TIME command. 0C status register C bit 7 = interrupt request flag bit 6 = peridoc interrupt flag bit 5 = alarm interrupt flag bit 4 = update interrupt flag bit 3-0 reserved 0D status register D bit 7 = 1 Real-Time Clock has power bit 6-0 reserved 0E diagnostics status byte bit 7 = 0 RTC lost power bit 6 = 1 CMOS RAM checksum bad bit 5 = 1 invalid configuration information at POST bit 4 = 1 memory size error at POST bit 3 = 1 fixed disk/adapter failed initialization bit 2 = 1 CMOS RAM time found invalid bit 1 = 1 adapters do not match configuration (EISA) bit 0 = 1 time out reading an adapter ID (EISA) 0F shutdown status byte 00 = normal execution of POST 01 = chip set initialization for real mode reentry 04 = jump to bootstrap code 05 = issue an EOI an JMP to Dword ptr at 40:67 06 = JMP to Dword ptrv at 40:67 without EOI 07 = return to INT15/87 (block move) 08 = return to POST memory test 09 = return to INT15/87 (block move) 0A = JMP to Dword ptr at 40:67 without EOI 0B = return IRETS through 40:67 10 diskette drive type for A: and B: bit 7-4 drive type of drive 0 bit 3-0 drive type of drive 1 = 0000 no drive = 0001 360K = 0010 1M2 = 0011 720K = 0100 1M44 = 0101-1111 reserved 11 reserved / AMI Extended CMOS setup (AMI Hi-Flex BIOS) bit 7 = 1 Typematic Rate Programming bit 6-5 = 00 Typematic Rate Delay 250 mSec bit 4-0 = 00011 Typematic Rate 21.8 Chars/Sec 12 fixed disk drive type for drive 0 and drive 1 bit 7-4 drive type of drive 0 bit 3-0 drive type of drive 1 if either of the nibbles equals 0F, then bytes 19 an 1A are valid 13 reserved / AMI Extended CMOS setup (AMI Hi-Flex BIOS) bit 7 = 1 Mouse Support Option bit 6 = 1 Above 1 MB Memory Test disable bit 5 = 1 Memory Test Tick Sound disable bit 4 = 1 Memory Parity Error Check enable bit 3 = 1 Hit <ESC> Message Display disabled bit 2 = 1 Hard Disk Type 47 Data Area at address 0:300 bit 1 = 1 Wait For <F1> If Any Error enabled bit 0 = 1 System Boot Up Num Lock is On 14 equipment byte bit 7-6 diskette drives installed = 00 1 drive installed⌨️ 快捷键说明
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