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Portfolio Specific BIOS Interrupt 61h -------------------------------------

Rewritten from Portfolio Technical Reference Guide by PiLA (pila@maloka.waw.pl)

Int 61h - DIP extended BIOS services

Function Description

00h Service Initialization 07h Format Credit Card Memory (CCM) 08h Get size of Internal disk 09h Format Internal disk 0Bh Determine if CCM present 0Dh Get Screen size 0Eh Get/Set Screen mode 0Fh Get/Set Cursor mode 10h Get/Set virtual screen position 11h Move virtual screen position 12h Screen refresh 15h Sound generation 16h Melody tone 17h Dial number 18h Mute states 19h Get Serial port parameters 1Ah Get Peripheral ID byte 1Bh Set Peripheral ID byte 1Ch Preset Peripheral IO data 1Eh Get/Set Clock tick speed 20h Disable revectoring of Int 09h 24h Get/Set ROM space state 26h Get/Set Power State 2Ch Get BIOS version number 2Dh Turn system off 2Eh Enable/Disable status line 30h File transfer via smart cable

Note: There are other reserved Int 61h services which are used internally by the Operating system. It is not recommended that these services are invoked by applications software, as they may be modified or deleted in future versions of the software.

Note from PiLA: If you get these "hidden" Int 61h services list, please let me know at my e-mail address: pila@maloka.waw.pl. Thanks.

Fn 00h Service Initialization ----------------------------- Parameters: AH 00h Returns: None

Note: This service should be called once only as part of its initialization by any application program that intends to use any Int 61h function calls.

Fn 07h Format Credit Card Memory -------------------------------- Parameters: AH 07h AL Drive number (0 or 1) Returns: CF Set if error during format AH Error code (See Int 13h)

Note: Drive number 0 selects drive A:, and drive number 1 selects drive B:. This service should not be used to format the internal disk (drive number 2).

Fn 08h Get size of Internal disk -------------------------------- Parameters: AH 08h Returns: AX Segment Address of disk BX Size of disk in Kbytes

Fn 09h Format Internal disk --------------------------- Parameters: AH 09h BX Size of disk in Kbytes Returns: If CF=1 BX Maximum size possible (K)

Note: The systemn is rebooted if successful. All files on drive C: will be lost.

Fn 0Bh Determine if CCM present and valid ----------------------------------------- Parameters: AH 0Bh Al Drive number (0 or 1) Returns: CF=0 Card present and correct If CF=1 AH Error code (See Int 13h)

Note: This can be used to determine if a valid CCM is in the specified drive. Drive number 0 selects A:, and drive number 1 selects physical drive B:.

Fn 0Dh Get screen size ---------------------- Parameters: AH 0Dh Returns: AX Physical screen size DX Logical screen size

Note: AH/DH Row number AL/DL Column number

Fn 0Eh Get/Set screen mode -------------------------- Parameters: AH 0Eh AL=0 Get mode AL=1 Set mode DL New mode Returns: If AL=0 DL Mode If AL=1 DL Old mode

Note: The mode is changed by setting one of the following mode bits in DL:

Clear bits (00h) 80 by 25 mode bit 0 (01h) 40 by 8 mode bit 1 (02h) Tracked mode bit 7 (80h) Graphics

These bits are mutually exclusive. When changing to 40 by 8 mode, if the cursor position or virtual screen origin is off the screen, then the virtual screen origin will be set to (0.0), the Screen cleared and cursor homed.

Fn 0Fh Get/Set Cursor mode -------------------------- Parameters: AH 0Fh AL=0 Get mode AL=1 Set mode BL New Cursor mode AL=2 Force mode Returns: If AL=0 BL Cursor mode If AL>0 BL Old Cursor mode

Note: Cursor mode is as follows:

0 Cursor off 1 Underline 2 Block

Force mode automatically sets the BIOS cursor size to reflect the Keyboard Numlock state.

Fn 10h Get/Set virtual screen position -------------------------------------- Parameters: AH 10h AL 0 Get position AL 1 Set positon If AL=1 DH Row number DL Column number Returns: If AL=0 DH Row number DL Column number

Note: The virtual screen position is the top left origin of the 40 by 8 window on the logical screen.

Fn 11h Move virtual screen position ----------------------------------- Parameters: AH 11h AL Number of lines to move cursor DL Direction of move cursor 1 Up 2 Down 3 Left 4 Right Returns: None

Note: This moves the origin of the virtual screen within scroll margins. It only works if in Static or Tracked mode, and has similar effect pressing Alt+Cursor keys.

Fn 12h Screen refresh --------------------- Parameters: AH 12h Returns: None

Note: This service copies the contents of the Video RAM to the LCD controller, and is slightly faster than invoking Int 10h service 0.

Fn 15h Sound generation ----------------------- Parameters: AH 15h AL Sub service: 0 Key click 1 Beep 2 Alarm Returns: None

Fn 16h Melody tone generator ---------------------------- Parameters: AH 16h CX Lenght of tone in 10 mSecs intervals DL Tone code (See below)

30h D#5 622.3 Hz 31h E-5 659.3 Hz 32h F-5 698.5 Hz 33h F#5 740.0 Hz 34h G-5 784.0 Hz 35h G#5 830.6 Hz 36h A-5 880.6 Hz 37h A#5 932.3 Hz 38h B-5 987.8 Hz 39h C-6 1046.5 Hz 3Ah C#6 1108.7 Hz 29h D-6 1174.7 Hz 3Bh D#6 1244.5 Hz 3Ch E-6 1318.5 Hz 3Dh F-6 1396.9 Hz 0Eh F#6 1480.0 Hz 3Eh G-6 1568.9 Hz 2Ch G#6 1661.2 Hz 3Fh A-6 1760.0 Hz 04h A#6 1864.7 Hz 05h B-6 1975.5 Hz 25h C-7 2093.0 Hz 2Fh C#7 2217.5 Hz 06h D-7 2349.3 Hz 07h D#7 2489.0 Hz Returns: None

Fn 17h Dial number ------------------ Parameters: AH 17h DS:SI String of characters CX Lenght of string Returns: None

Note: String to be in ASCII. Valid characters are: 0 1 2 3 4 5 6 7 8 9 A B C D * #. Letters must be in upper case.

Fn 18h Mute states ------------------ Parameters: AH 18h AL 00 Get mute state 01 Set mute state 02 Get key click state 03 Set key click state 04 Get beep state 05 Set beep state 06 Get alarm state 07 Set alarm state 08 Get DTMF duration 09 Set DTMF duration If AL=1, 3, 5, 7 or 9 DL 0 Off (Muted) 1 On Returns: If AL=0, 2, 4, 6 or 8 DL 0 Off (Muted) 1 On

Fn 19h Get Serial port parameters --------------------------------- Parameters: AH 19h DX Serial port number Returns: If AH=0, Composite parameters in AL If AH<>0, Error

Note: This service returns composite parameters identical to those used by Int 14h service 0 (Initialize).

Fn 1Ah Get Peripheral ID byte ----------------------------- Parameters: None Returns: AH Peripheral ID byte AL 0 if no peripheral installed

Note: This returns the peripheral ID code for the current terminating peripheral (See Fn 1Bh).

Fn 1Bh Set Peripheral ID byte ----------------------------- Parameters: AH 1Bh AL=0 Set Serial ID AL=1 Set Parallel ID DL Current periheral ID Returns: None

Note: There may be peripherals designed that contain circuitry that is similiar to the Serial or Parallel peripherals. In order that these peripherals may use existing BIOS services they must identify themselves as being software compatible. DL should be set to the Peripheral ID code (See Fn 1Ah).

Fn 1Ch Preset/Return Peripheral data ------------------------------------ Parameters: AH 1Ch AL=0 Preset Data values AL=1 Return Data values BH Table entry number If AL=0 BL Data value DX IO address Returns: If AL=1 BL Data value DX IO address

Note: This service is used to preset peripheral IO data in a table associating an IO address with a data value. Service 0 will actually output the data to the specified IO locations. On Power-up, the table entries will be scanned for non-zero IO address values, and the associated data will be written out. This would typically be used to restore Interrupt numbers following Power-up. The first four table entries out of 10 max are reserved.

Fn 1Eh Get/Set Clock tick speed ------------------------------- Parameters: AH 1Eh AL Subservice 0 Get speed 1 Set speed If AL=1 BX Clock tick speed 0 Tick every 128 seconds 1 Tick every second Returns: If AL=0 BX Clock tick speed 0 Tick every 128 seconds 1 Tick every second

Note: 1 sec speed uses much more power.

Fn 1Fh Get-key/NMI invoked screen refresh ----------------------------------------- Parameters: AH 1Fh AL=0 Get refresh state AL=1 Set refresh state If AL=1 DX New state Returns: If AL=0 DX Current state If AL=1 DX Old state

Note: DH Refresh on NMIs state DL Refresh on keys state DH/DL=0 Revectoring disabled DH/DL=1 Revectoring enabled

If bit 7 of the state is set, then the state is unchanged.

Fn 20h Disable revectoring of Int 9h ------------------------------------ Parameters: AH 20h AL=0 Get revectoring of Int 9h state AL=1 Set revectoring of Int 9h state If AL=1 DL=0 Disable revectoring DL=1 Enable revectoring Returns: If AL=0 DL=0 Revectoring disabled DL=1 Revectoring enabled

Note: This is used to automatically revector Int 9h to the BIOS. This prevents applications software from setting up its own Int 9h. Note that Portfolio keyboard IO address is not IBM compatible. This service is automatically invoked on a boot.

Fn 24h Get/Set ROM/CCM space state ---------------------------------- Parameters: AH 24h AL=0 Get ROM state AL=1 Set ROM state If AL=1 DL New ROM state DH New CCM state Returns: If AL=0 DL Current ROM state DH Current CCM state If AL=1 DL Old ROM state DH Old CCM state

Note: ROM state in DL is as follows: DL=0 Normal applications ROM DL=1 CCM Drive A: DL=2 CCM Drive B: DL=3 Expansion ROM

CCM state in DH is as follows:

DH=0 CCM Drives Disable(d) DH=1 CCM Drive A: Permanently enable(d) DH=2 CCM Drive B: Permanently enable(d)

CF=0 No error CF=1 Invalid option or error

Note: This service should be used with care, as it can swap either Memory cards or an extension ROM into the C000:0 to 0DFFF:F address range. This range is normally used by the internal applications ROM. Its primary use is to allow advanced users direct access extension ROMs and Memory cards.

Fn 26h Get/Set Power control ---------------------------- Parameters: AH 26h AL=0 Get Power control state AL=1 Set Power control state If AL=1 DL New state Returns: If AL=0 DL Current state If AL=1 DL Old state

Note: DL=0 Normal Power-down on low battery DL=1 Prevent Power-down but display warning DL=2 Prevent Power-down with no warning

This is used to prevent the Portfolio from powering down on a low battery. It is not recommended for use except for conditions in which a power down might be critical to an application or peripheral.

Fn 28h Get/Set Text/Keyboard language ------------------------------------- Parameters: AH 28h AL=0 Get Languages AL=1 Set Languages AL=3 Language table pointers If AL=1 DX New languages Returns: If AL=0 DX Current languages If AL=1 DX Old languages If AL=3 ES:CX Keyboard table pointer ES:DX Language table pointer

Note: DH Text language DL Keyboard language

Both DH and DL will be 0, 1 or 2, corresponding to the language in the ROM.

If bit 7 of the language/keyboard code is set, then it remains unchanged.

The tables consist of a count byte, followed by the language identification codes for the resident languages. These are as follows:

ENGLISH 0 FRENCH 1 GERMAN 2 SPANISH 3 ITALIAN 4 SWEDISH 5 DANISH 6

Fn 2Ch Get BIOS version number ------------------------------ Parameters: AH 2Ch Returns: DS:BX Address of BIOS version number

Note: The version number consists of a Major and Minor version number, followed by a '$' terminator. A typical example is: '1.050$'

Fn 2Dh Turn system off ---------------------- Parameters: AH 2Dh Returns: None

Note: This is similiar to typing OFF at the command line.

Fn 2Eh Enable/Disable system status line ---------------------------------------- Parameters: AH 2Eh AL=0 Disable status line AL=1 Enable status line DH Row number DL Column number Returns: None

Note: This is similiar to invoking the status line using the LOCK key.

Fn 30h File Transfer services ----------------------------- Parameters: AH 30h AL 0 Transmit block 1 Receive block 2 Open ports 3 Close ports 4 Wait 500mS DS:DX Start of Data buffer If AL=0 CX Bytes to Send If AL=1 CX Maximum buffer size Returns: If AL=1 CX Bytes Received DL Error Code 0 No error 1 Buffer size too small 2 Timeout on transmision 3 Checksum failure 4 Invalid sub-service 5 Peripheral not installed

Note: This is used by the File Transfer utility built into System Setup.

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