Copyright(C) 1994,1995,1996,1997 Terumasa KODAKA, Takeshi KONO
■98MULTi CanBe control
Target PC-9821Cf･Cx･Cb･Cx2･Cb2･Cx3･Cb3･Na12･Na9･Na7･Nb7･Nx
Description o The 98MULTi CanBe has special I/O ports to control various multimedia
functions. This I/O is mainly used to control the remote control,
control sound functions, turn off the power, etc. Also, the PC-9821Na7/Nx,
which is a multimedia-oriented 98NOTE, is based on the 98MULTi CanBe and
has similar I/O. o Normally this I/O address can be relocated by I/O
0C24h, 0C2Bh, 0C2Dh. Usually set to I/O 0F4Ah,0F4Bh.
o When there is a reception from the remote control, an interrupt is
generated to the CPU. The CPU can monitor the status of the remote
control by hooking this interrupt.
o Perform power-off processing. PC-9821Cf/Cx/Cb/Cx2/Cb2/Cx3/Cb3 does not
support power off using INT 1Fh - Function 98h, so it is necessary to
directly operate the hardware to turn off the power.
Related I/O 0C24h,0C2Bh,0C2Dh
I/O 0F4Ah
Name Remote control control [INDEX]
Function bit 7～0: Register specification
* Specify the register number to read/write with I/O 0F4Bh
Related I/O 0F4Bh
I/O 0C24h,0C2Bh,0C2Dh
I/O 0F4Bh
Name Remote control control [DATA]
Function bit 7～0: Data specification
* Read and write the register specified by I/O 0F4Ah.
--------+--------------------------------------------------------------
INDEX | Usage
--------+--------------------------------------------------------------
00h | Unknown
--------+--------------------------------------------------------------
01h | Sound interrupt address
| [READ/WRITE]
| 00h=INT5
| 02h=INT41
| 03h=INT0
| 08h=INT1
| * The interrupt address used by WindowsSoundSystem is set
| Related I/O 0F40h bit 5～3
--------+--------------------------------------------------------------
02h | Unknown
--------+--------------------------------------------------------------
03h | Remote control reset
| [READ/WRITE]
| bit 7～3: unknown
| bit 2: Microphone through
| 1=Mic through
| 0=Do not use microphone through
| bit 1: unknown
| bit 0: Controller reset
| 1=Reset
| 0=Do not reset
--------+--------------------------------------------------------------
04h | Mute control
| [READ/WRITE]
| bit 7～1: unknown
| bit 0: Mute
| 1=mute
| 0=Do not mute
| * Control muting of sound output
--------+--------------------------------------------------------------
10h | Remote control data status
| [READ]
| bit 7~2: Unused
| bit 1: Busy flag
| 1=Reday
| 0=Busy
| bit 0: Status
| 1=Receive data available
| 0=No data received
| * It is set when data is received from the remote control
| and generates an interrupt to the CPU.
| I/O 0F4Ah,0F4Bh - Cleared by taking the receive code 2
| bytes from 11h.
--------+--------------------------------------------------------------
11h | Remote control reception code
| [READ]
| 00000000b(00h)= Pressed [^](Ch UP)
| 11111111b(FFh)= Read second time after pressing [^](Ch UP)
| 00000001b(01h)= Pressed [v](Ch DOWN)
| 11111111b(FEh)= Read second time after pressing [v](Ch DOWN)
| 00000010b(02h)= [^](VOL UP) was pressed
| 11111101b(FDh)= Read second time after pressing [^](VOL UP)
| 00000011b(03h)= Pressed [V](VOL DOWN)
| 11111100b(FCh)= Read after pressing [V](VOL DOWN)
| 00000100b(04h)= [^](EJECT) was pressed
| 11111011b(FBh)= Read second time after pressing [^](EJECT)
| 00000101b(05h)= [》||] pressed
| 11111010b(FAh)= Read second time after pressing [》||]
| 00001001b(09h)= [MUTE] pressed
| 11110110b(F6h)= Read second time after pressing [MUTE]
| 00001010b(0Ah)= [VIDEO] pressed
| 11110101b(F5h)= Read second time after pressing [VIDEO]
| 00001100b(0Ch)= [>>] pressed
| 11110011b(F3h)= Read second time after pressing [>>]
| 00001101b(0Dh)= [<<] pressed
| 11110010b(F2h)= Read second time after pressing [<<]
| 00011101b(1Dh)= Pressed [MAIN/SUB]
| 11100010b(E2h)= Read second time after pressing [MAIN/SUB]
| 01000000b(40h)= Pressed [↑]
| 10111111b(BFh)= Read second time after pressing [↑]
| 01000001b(41h)= Pressed [↓]
| 10111110b(BEh)= Read second time after pressing [↓]
| 01000010b(42h)= [←] pressed
| 10111101b(BDh)= Read second time after pressing [←]
| 01000011b(43h)= Pressed [→]
| 10111100b(BCh)= Read second time after pressing [→]
| 01001101b(4Dh)= [SIZE] pressed
| 10110010b(B2h)= Read second time after pressing [SIZE]
| 01001110b(4Eh)= [ESC] pressed
| 10110001b(B1h)= Read second time after pressing [ESC]
| 01001111b(4Fh)= [CR] pressed
| 10110000b(B0h)= Read second time after pressing [CR]
| 01010011b(53h)= Pressed [TV]
| 10101100b(ACh)= Read second time after pressing [TV]
| 01011011b(5Dh)= Pressed [FREEZE]
| 10100010b(A2h)= Read second time after pressing [FREEZE]
| 01011110b(5Eh)= [CAPTURE] pressed
| 10100001b(A1h)= Read second time after pressing [CAPTURE]
| * The reception code from the remote control is obtained in the form
| of a code number assigned to each button.
| * Each code reads two bytes consecutively. In the second byte, the
| bit-inverted value of the first byte is read.
--------+--------------------------------------------------------------
12h | Unknown
--------+--------------------------------------------------------------
13h | Power control
| [WRITE]
| 80h,06h,00h,00h,80h,07h,00h,01h,80h,01h,00h,00h
| * Writing this byte string will turn off the power.
|
| 80h,05h,00h,00h
| * This byte string is written when the power is turned on.
--------+--------------------------------------------------------------
14h | ■[CANBE]
| Interrupts used by the remote control
| [READ/WRITE]
| bit 7~3: unknown
| bit 2: Remote control interrupt
| 1=not used
| 0=use
| bit 1,0: Remote control interrupt address
| 11b=INT41
| 10b=INT1
| 01b=INT2
| 00b=INT0
| * Set the interrupt address etc. used by the remote control.
+--------------------------------------------------------------
| ■[PC-9821Nx]
| Unknown
--------+--------------------------------------------------------------
30h | CanBe VOL1･2(YMF288 output) L
--------+--------------------------------------------------------------
31h | CanBe VOL1･2(YMF288 output) R
--------+--------------------------------------------------------------
32h | CanBe VOL3･4(LINE input) L
--------+--------------------------------------------------------------
33h | CanBe VOL3･4(LINE input) R
--------+--------------------------------------------------------------
34h | Unknown
--------+--------------------------------------------------------------
35h | Unknown
--------+--------------------------------------------------------------
Related I/O 0F4Ah
I/O 0C24h,0C2Bh,0C2Dh
-------------------------------------------------------------------------------
■TV tuner board
Target PC-9821Cf・Cx・Cb
Description o The PC-9821Cf, Cx, and Cb come standard with a dedicated TV
tuner board for capturing and overlaying TV images.
Related INT 0Eh
I/O 0960h
Name TV tuner control [DATA]
Undocumented
Function [READ/WRITE]
bit 15～0: data
---------+------------------------------------------------------
register | content
---------+------------------------------------------------------
0000h |Freeze settings
|bit 15～1: unknown
|bit 0: Freeze
| 1=Freeze
| 0=do not freeze
---------+------------------------------------------------------
0001h | Unknown
---------+------------------------------------------------------
0002h | Unknown
---------+------------------------------------------------------
0003h | Capture range specification
| bit 15～0: Screen X coordinate
---------+------------------------------------------------------
0004h | Capture range specification
| bit 15～0: Screen Y coordinate
---------+------------------------------------------------------
0005h | Capture range specification
| bit 15～0: Screen X size
---------+------------------------------------------------------
0006h | Unused
0007h | Unused
---------+------------------------------------------------------
0008h | Unknown X size
---------+------------------------------------------------------
0009h | Unknown X size
---------+------------------------------------------------------
000Ah | Unknown Y size
---------+------------------------------------------------------
000Bh | Unknown Y size
---------+------------------------------------------------------
000Ch | Unused
---------+------------------------------------------------------
000Dh | Unknown
---------+------------------------------------------------------
000Eh | Unused
000Fh | Unused
---------+------------------------------------------------------
0010h | Unknown
---------+------------------------------------------------------
0011h | Display position
| bit 15~10: Unused
| bit 9～0: Screen display position (X coordinate)
---------+------------------------------------------------------
0012h | Display position
| bit 15~10: Unused
| bit 9～0: Screen display position (Y coordinate)
---------+------------------------------------------------------
0013h | Capture start position (dot number)
---------+------------------------------------------------------
0014h | Capture start position (line number)
---------+------------------------------------------------------
0015h | Display position
| bit 15~10: Unused
| bit 9～0: Screen display position (X coordinate)
---------+------------------------------------------------------
0016h | Display position
| bit 15~10: Unused
| bit 9～0: Screen display position (Y coordinate)
---------+------------------------------------------------------
0017h | Right side mask start position
| bit 15~10: Unused
| bit 9～0: Mask start position (X coordinate)
---------+------------------------------------------------------
0018h | Lower mask start position
| bit 15~10: Unused
| bit 9～0: Mask start position (Y coordinate)
---------+------------------------------------------------------
0019h |
: | Unused
001Fh |
---------+------------------------------------------------------
0020h | Unknown
---------+------------------------------------------------------
0021h | Voice control
| bit 15~4: unused
| bit 3,2: Audio mute
| 11b=Mute
| 10b=Mute
| 01b=Do not mute
| 00b=Mute
| bit 1,0: unknown
---------+------------------------------------------------------
Description o Read and write the register specified by I/O 0962h.
Related I/O 0962h
I/O 0962h
Name TV tuner control [INDEX]
Undocumented
Function [READ/WRITE]
bit 15～0: Register specification
Description o Specify the register number to read/write with I/O 0960h.
o It is possible to detect the presence of a video capture board by
checking whether 0000h can be read normally when reading immediately after
writing 0000h to this port.
Related I/O 0960h
I/O 0964h
Name Capture data
Undocumented
Function [READ]
bit 15～0: data
* Capture data collection
Explanation o Retrieve the captured data.
Related I/O 0962h,0960h
I/O 0966h
Name Unknown
Undocumented
Function [READ/WRITE]
bit 7～0: unknown
Explanation o Details unknown
Related I/O 0967h
I/O 0967h
Name Unknown
Undocumented
Function [READ/WRITE]
bit 7～0: unknown
Explanation o Details unknown
Related I/O 0966h