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AH = 3Fh BX = handle for character device "$IPCUST" CX = number of bytes to read DS:DX -> buffer for configuration data (see #01411)
Return:
CF clear if successful AX = number of bytes actually read CF set on error AX = error code (05h,06h) (see #01680 at AH=59h/BX=0000h)
Notes: If less than the entire data is read or written, the next read/write continues where the previous one ended; IOCTL calls AX=4402h and AX=4403h both reset the location at which the next operation starts to zero. The data pointer is also reset to zero if the previous read or write reached or exceeded the end of the data, when the current function is read and the previous was write, or vice versa. V2.1+ uses a new configuration method, but allows the installation of IPCUST.SYS for backward compatibility with other software which must read the PC/TCP configuration
See Also: AH=40h"IPCUST" - AX=4402h"IPCUST" - AX=4402h"FTPSOFT"
Format of PC/TCP configuration data: Offset Size Description (Table 01411) 00h 12 BYTEs IPCUST.SYS device driver header (see #01646) 12h BYTE ??? 13h BYTE ??? 14h WORD ??? 16h BYTE bit flags
bit 0:
Send BS rather than DEL for BackSpace keybit 1:
Wrap long lines 17h BYTE ??? 18h 64 BYTEs ASCIZ hostname 58h 64 BYTEs ASCIZ domain name (fully qualified domain name is hostname.domain-name) 98h 16 BYTEs ASCIZ username A8h 64 BYTEs ASCIZ full name E8h 64 BYTEs ASCIZ office address 128h 32 BYTEs ASCIZ phone number 148h WORD offset from GMT in minutes 14Ah 4 BYTEs ASCIZ timezone name 14Eh WORD number of time servers 150h ? DWORDs (big-endian) IP addresses for time servers. ??? 164h WORD number of old-style name servers 166h 3 DWORDs (big-endian) IP addresses for name servers 172h WORD number of domain name servers 174h 3 DWORDs (big-endian) IP addresses for domain name servers 180h DWORD (big-endian) IP address of default gateway 184h DWORD (big-endian) IP address of log server 188h DWORD (big-endian) IP address of cookie server 18Ch DWORD (big-endian) IP address of lpr server 190h DWORD (big-endian) IP address of imagen print server 194h 54 BYTEs ??? 1E8h WORD TCP default window size in bytes 1EAh WORD TCP low window size 1ECh 64 BYTEs ASCIZ host tabel filename 22Ch 2 BYTEs ??? 22Eh 80 BYTEs ASCIZ mail relay host name 27Eh BYTE ??? 27Fh BYTE ??? bit flags 280h 44 BYTEs ??? 2ACh WORD ??? 2AEh 202 BYTEs ???
Category: Network - Int 21h - P
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