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- version equ 2
-
- ; Copyright, 1989-1992, Russell Nelson, Crynwr Software
-
- ; This program is free software; you can redistribute it and/or modify
- ; it under the terms of the GNU General Public License as published by
- ; the Free Software Foundation, version 1.
- ;
- ; This program is distributed in the hope that it will be useful,
- ; but WITHOUT ANY WARRANTY; without even the implied warranty of
- ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- ; GNU General Public License for more details.
- ;
- ; You should have received a copy of the GNU General Public License
- ; along with this program; if not, write to the Free Software
- ; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
- include defs.asm
-
- code segment word public
- assume cs:code, ds:code
-
- org 80h
- phd_dioa label byte
-
- org 100h
- start:
- jmp start_1
-
- copyleft_msg label byte
- db "Packet mode version ",'0'+(majver / 10),'0'+(majver mod 10),".",'0'+version," copyright 1990, Russell Nelson.",CR,LF
- db "This program is free software; see the file COPYING for details.",CR,LF
- db "NO WARRANTY; see the file COPYING for details.",CR,LF
- crlf_msg db CR,LF,'$'
-
- their_isr dd ?
- entry_point db ?,?,?,?
- packet_mode dw -1,?
-
- handle dw 0
- this_mode dw ?
- bogus_type db 0,0 ;totally bogus type code.
-
- signature db 'PKT DRVR',0
- signature_len equ $-signature
- no_signature_msg db "No packet driver at that address",'$'
- usage_msg db "usage: pktmode <packet_int_no> [<mode>]",'$'
- bad_handle_msg db "Bad handle error",'$'
- bad_mode_msg db "Bad mode error",'$'
- bad_error_msg db "Unknown error",'$'
-
- not_implemented db "no ",'$'
- current_mode db "current ",'$'
- two_spaces db "yes ",'$'
-
- mode_names dw mode_1_msg,mode_2_msg,mode_3_msg,mode_4_msg
- dw mode_5_msg,mode_6_msg,mode_7_msg
-
- mode_1_msg db "1) Turn off receiver",CR,LF,'$'
- mode_2_msg db "2) Receive only packets sent to this interface",CR,LF,'$'
- mode_3_msg db "3) Mode 2 plus broadcast",CR,LF,'$'
- mode_4_msg db "4) Mode 3 plus limited multicast",CR,LF,'$'
- mode_5_msg db "5) Mode 3 plus all multicast",CR,LF,'$'
- mode_6_msg db "6) All packets",CR,LF,'$'
- mode_7_msg db "7) Raw mode",CR,LF,'$'
-
-
- usage_error:
- mov dx,offset usage_msg
- error:
- mov ah,9
- int 21h
- jmp all_done
-
- start_1:
- cld
-
- mov dx,offset copyleft_msg
- mov ah,9
- int 21h
-
- mov si,offset phd_dioa+1
- cmp byte ptr [si],CR ;end of line?
- je usage_error
-
- mov di,offset entry_point
- call get_number
- mov di,offset packet_mode
- call get_number
-
- mov ah,35h ;get their packet interrupt.
- mov al,entry_point
- int 21h
- mov their_isr.offs,bx
- mov their_isr.segm,es
-
- lea di,3[bx]
- mov si,offset signature
- mov cx,signature_len
- repe cmpsb
- je signature_ok
- mov dx,offset no_signature_msg
- jmp error
- bad_j_1:
- jmp bad
- signature_ok:
-
- mov ax,1ffh ;driver_info
- call int_pkt
- call fatal_error
-
- mov ah,2 ;access all packets.
- mov al,ch ;their class from driver_info().
- mov bx,dx ;their type from driver_info().
- mov dl,cl ;their number from driver_info().
- mov cx,2 ;use a type length of 2.
- mov si,offset bogus_type
- movseg es,cs
- mov di,offset our_recv
- call int_pkt
- call fatal_error
- mov handle,ax
-
- mov cx,packet_mode
- cmp cx,-1
- je get_mode
-
- mov ah,20 ;set the receive mode.
- mov bx,handle
- call int_pkt
- jc bad_j_1
-
- mov bx,cx ;print the name of this mode.
- shl bx,1
- mov ah,9
- mov dx,mode_names[bx-2]
- int 21h
-
- jmp okay
- ;now print the current mode.
-
- get_mode:
- mov ah,21 ;get the receive mode.
- mov bx,handle
- call int_pkt
- jc bad
- mov packet_mode,ax
-
- mov this_mode,1 ;start trying with mode 1.
- try_mode:
- cmp this_mode,6 ;have we hit the last mode?
- ja no_more_modes ;yes.
-
- mov ah,20 ;set the receive mode.
- mov bx,handle
- mov cx,this_mode
- call int_pkt
- mov dx,offset not_implemented
- jc tried_mode ;we tried it, and it didn't work.
- mov dx,offset current_mode
- mov cx,this_mode ;is this the current mode?
- cmp packet_mode,cx
- je tried_mode
- mov dx,offset two_spaces
- tried_mode:
- mov ah,9 ;print either " ", "xx", or "->"
- int 21h
-
- mov bx,this_mode ;print the name of this mode.
- shl bx,1
- mov ah,9
- mov dx,mode_names[bx-2]
- int 21h
-
- inc this_mode ;try the next mode.
- jmp try_mode
-
- no_more_modes:
-
- mov ah,20 ;set the receive mode.
- mov bx,handle
- mov cx,packet_mode
- call int_pkt
-
- all_done:
- xor bx,bx ;only release the handle once.
- xchg bx,handle
- or bx,bx
- je all_done_1 ;we've already released it.
- mov ah,3 ;release_type
- call int_pkt
- jc bad
- all_done_1:
- int 20h
-
- bad:
- call print_error
- okay:
- jmp all_done
-
-
- our_recv:
- or ax,ax ;first or second call?
- jne our_recv_1 ;second -- we ignore the packet
- movseg es,cs
- mov di,offset our_buffer
- our_recv_1:
- retf
-
-
- int_pkt:
- push ds
- push es
- pushf
- cli
- call their_isr
- pop es
- pop ds
- ret
-
- include getnum.asm
- include skipblk.asm
- include getdig.asm
- include pkterr.asm
- include chrout.asm
-
- align 4
- our_buffer label byte
-
- code ends
-
- end start
-