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- Function 0: Boot -- Miscellaneous Functions --
- Function 12: Return CP/M Version Number
- Function 48: Return Enhanced DOS Version
- Function 98: Get System Time
- Function 99: Set System Time
- Function 100: Get ZSDOS Flags
- Function 101: Set ZSDOS Flags
- Function 102: Get File Stamp
- Function 103: Set File Stamp
- Time/Date Codes
- :
-
- +---------------------------------------------------------------+
- | FUNCTION 0 -- BOOT |
- +------------------------------+--------------------------------+
- | Entry: C = 0 (00h) | Exit: None |
- | | |
- | | |
- +------------------------------+--------------------------------+
-
- Rarely used, but provides a clean termination of program: removable disks
- are reset, the DMA address is set to the default 80h, and the CCP is
- reloaded.
-
- The same results are obtained if the terminating program jumps to location
- 00h.
-
- It is usually more desirable to terminate an program by returning (RET) to
- the CCP, if it has not been overwritten.
- :
-
- +---------------------------------------------------------------+
- | FUNCTION 12 -- RETURN CP/M VERSION NUMBER |
- +------------------------------+--------------------------------+
- | Entry: C = 12 (0Ch) | Exit: HL = 22h |
- | | |
- | | |
- +------------------------------+--------------------------------+
-
- Returns 22h to indicate compatibility with CP/M 2.2. To confirm the ZSDOS
- version use Function 48.
-
- For compatibility with older programs written for Plu*Perfect DateStamper,
- if DateStamper file date stamping is running, the function also returns the
- address of the DateStamper clock routine in DE, if "D" (44h) is passed in E
- when the function is called.
- :
-
- +---------------------------------------------------------------+
- | FUNCTION 48 -- RETURN ENHANCED DOS VERSION |
- +-------------------------------+-------------------------------+
- | Entry: C = 48 (30h) | Exit: A = Version number |
- | | H = DOS identifier |
- | | L = Same as A |
- +-------------------------------+-------------------------------+
-
- Returns the current ZSDOS version number in both A and L. In addition, an
- indentifier is returned in H to allow differentiation between the various
- enhanced DOS's.
-
- CP/M returns zero (not implemented) in A and L. Only three DOS identifiers
- are currently in use:
- 0 ZRDOS
- 'D' (44h) ZDDOS
- 'S' (53h) ZSDOS
- :
-
- +---------------------------------------------------------------+
- | FUNCTION 98 -- GET TIME |
- +-------------------------------+-------------------------------+
- | Entry: C = 98 (62h) | Exit: A = Time/date code |
- | DE = Address of buffer | |
- | | |
- +-------------------------------+-------------------------------+
-
- Puts system time as a 6-byte BCD date specification into the buffer whose
- address is passed in DE.
-
- Returns an error if the clock cannot be read or if no clock driver is
- installed.
- :
-
- +---------------------------------------------------------------+
- | FUNCTION 99 -- SET TIME |
- +-------------------------------+-------------------------------+
- | Entry: C = 99 (63h) | Exit: A = Time/date code |
- | DE = Address of buffer | |
- | | |
- +-------------------------------+-------------------------------+
-
- Sets the system time from a 6-byte BCD date specification in the buffer
- whose address is passed in DE.
-
- Returns an error if the clock cannot be set or if no clock drive is
- installed.
- :
-
- +---------------------------------------------------------------+
- | FUNCTION 100 -- GET FLAGS |
- +-------------------------------+-------------------------------+
- | Entry: C = 100 (64h) | Exit: HL = Flags |
- | | |
- | | |
- +-------------------------------+-------------------------------+
-
- Returns current ZSDOS configuration flags in L. For future compatibility H
- is set to zero.
-
- Bit flags in L (1=enable, 0=disable):
- b0 = allow public files using public attribute
- b1 = allow writing to public files or along path
- b2 = preserve write-protect vector across warm boots
- b3 = allow fast fixed disk relog
- b4 = issue warning of disk change
- b5 = use ZCPR path to open system files (not used by ZDDOS)
- b6 = allow opening non-system files on path (if b5 is set)
- b7 = reserved
- :
-
- +---------------------------------------------------------------+
- | FUNCTION 101 -- SET FLAGS |
- +-------------------------------+-------------------------------+
- | Entry: C = 101 (65h) | Exit: None |
- | DE = Flags | |
- | | |
- +-------------------------------+-------------------------------+
-
- Sets current ZSDOS configuration flags from the value passed in E. For
- future compatibility D should be set to zero, although it is currently
- ignored by this function.
-
- Bit flags in E (1=enable, 0=disable):
- b0 = allow public files using public attribute
- b1 = allow writing to public files or along path
- b2 = preserve write-protect vector across warm boots
- b3 = allow fast fixed disk relog
- b4 = issue warning of disk change
- b5 = use ZCPR path to open system files (not used by ZDDOS)
- b6 = allow opening non-system files on path (if b5 is set)
- b7 = reserved
- :
-
- +---------------------------------------------------------------+
- | FUNCTION 102 -- GET STAMP |
- +-------------------------------+-------------------------------+
- | Entry: C = 102 (66h) | Exit: A = Time/date code |
- | DE = Address of FCB | |
- | | |
- +-------------------------------+-------------------------------+
-
- Puts the BCD file stamp for the file in the file control block (FCB) in the
- first 15 bytes of the current DMA buffer. The buffer length must be at
- least 128 bytes.
-
- Returns an error if the stamp could not be read or if no driver is
- installed.
-
- The extent (FCB+12) and data module (FCB+14) bytes in the FCB must be zero,
- and the correct user number for the file must be set via Functions 32 or
- 45.
- :
-
- +---------------------------------------------------------------+
- | FUNCTION 103 -- SET STAMP |
- +-------------------------------+-------------------------------+
- | Entry: C = 103 (67h) | Exit: A = Time/date code |
- | DE = Address of FCB | |
- | | |
- +-------------------------------+-------------------------------+
-
- Gets the BCD file stamp for the file in the file control block (FCB) from
- the first 15 bytes of the current DMA buffer and records it on disk. The
- buffer length must be at least 128 bytes.
-
- Returns an error if the stamp could not be written or if no driver is
- installed. No stamp will be written if the disk is write protected.
-
- The extent (FCB+12) and data module (FCB+14) bytes in the FCB must be zero,
- and the correct user number for the file must be set via either Functions
- 32 or 45.
- :
-
-
- TIME/DATE CODES
-
- (Returned by Functions 98, 99, 102, and 103)
-
- A = 1 no error
- A = FFh error