Category : Network Files
Archive   : PKTD11A.ZIP
Filename : DEFS.ASM

majver equ 11 ;version number of the infrastructure.

MAX_ADDR_LEN equ 16 ;maximum number of bytes in our address.

MAX_HANDLE equ 10 ;maximum number of handles.

MAX_P_LEN equ 8 ;maximum type length

MAX_MULTICAST equ 8 ;maximum number of multicast addresses.

; Copyright, 1988-1992, 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.

HT equ 09h
CR equ 0dh
LF equ 0ah

;
; Packet Driver Error numbers
NO_ERROR equ 0 ;no error at all.
ifndef SMCINC
BAD_HANDLE equ 1 ;invalid handle number
endif
NO_CLASS equ 2 ;no interfaces of specified class found
NO_TYPE equ 3 ;no interfaces of specified type found
NO_NUMBER equ 4 ;no interfaces of specified number found
ifndef SMCINC
BAD_TYPE equ 5 ;bad packet type specified
endif
NO_MULTICAST equ 6 ;this interface does not support
;multicast
CANT_TERMINATE equ 7 ;this packet driver cannot terminate
BAD_MODE equ 8 ;an invalid receiver mode was specified
NO_SPACE equ 9 ;operation failed because of
;insufficient space
TYPE_INUSE equ 10 ;the type had previously been accessed,
;and not released.
BAD_COMMAND equ 11 ;the command was out of range, or not
;implemented
CANT_SEND equ 12 ;the packet couldn't be sent (usually
;hardware error)
CANT_SET equ 13 ;hardware address couldn't be changed
;(more than 1 handle open)
BAD_ADDRESS equ 14 ;hardware address has bad length or
;format
CANT_RESET equ 15 ;Couldn't reset interface (more than
;1 handle open).
BAD_IOCB equ 16 ;an invalid iocb was specified

;a few useful Ethernet definitions.
RUNT equ 60 ;smallest legal size packet, no fcs
GIANT equ 1514 ;largest legal size packet, no fcs
EADDR_LEN equ 6 ;Ethernet address length.
ARCADDR_LEN equ 1

BLUEBOOK equ 1
IEEE8023 equ 11

;The following two macros are used to manipulate port addresses.
;Use loadport to initialize dx. Use setport to set a specific port on
;the board. setport remembers what the current port number is, but beware!
;setport assumes that code is being executed in the same order as the
;code is presented in the source file. Whenever this assumption is violated,
;you need to enter another loadport. Some, but not all examples are:
;in a loop with multiple setports, or a backward jump over a setport, or
;a forward jump over a setport. If you have any doubt, consult the
;individual driver sources for examples of usage. If you suspect that
;you have too few loadports, define the symbol "no_confidence" to a
;one. This will force a loadport before every setport. If you wish to turn
;it off for some of your code, redefine it to a zero.

loadport macro
mov dx,io_addr
port_no = 0
endm

;change the port number from the current value to the new value.
setport macro new_port_no
ifdef no_confidence ;define if you suspect that you don't
if no_confidence
loadport ; have enough loadports, i.e. dx is
endif
endif ; set to the wrong port.
if new_port_no - port_no EQ 1
inc dx
else
if new_port_no - port_no EQ -1
dec dx
else
if new_port_no - port_no NE 0
add dx,new_port_no - port_no
endif
endif
endif
port_no = new_port_no
endm

;this macro does a "rep movsb" with a static count.
repmov macro count
rept (count) / 2
movsw
endm
rept (count) MOD 2
movsb
endm
endm

;moves a segment register into another segment register.
movseg macro to, from
push from
pop to
endm

;add a word to a dword.
add2 macro n,a ; inc a 32 bit integer
add n.offs,a ;increment the low word
adc n.segm,0 ;increment the high word
endm

;this macro writes the given character to the given row and column on
; an CGA.
to_scrn macro r, c, ch
local again
push bx
push es
mov bx,0b800h
mov es,bx
mov bx,es:[r*160+c*2]
again:
inc bh
and bh,07h
je again ;; don't use black.
mov bl,ch
mov es:[r*160+c*2],bx
pop es
pop bx
endm



segmoffs struc ; defines offs as 0, segm as 2
offs dw ?
segm dw ?
segmoffs ends

CY equ 0001h
EI equ 0200h

iocb struc ; as_send_pkt structure
buffer dd ? ; Pointer to the buffer
len dw ? ; Its length
flags db ? ; Some flags
ret_code db ? ; Completion code
upcall dd ? ; I/O completion upcall
next dd ? ; Private next pointer (queue)
resv db 4 dup (?) ; Unused private data
iocb ends

DONE equ 1 ; I/O complete flag
CALLME equ 2 ; Please upcall me flag


send_queueempty macro

; Check if send queue is empty.
; Enter with interrupts disabled.
; Exit with zr (zero) if empty, nz (not zero) if not.
; Destroys ax.
mov ax, word ptr send_head ; Queue empty?
or ax, word ptr send_head+2
endm

send_peekqueue macro
; Peek into the queue and get the next entry.
; Enter with interrupts disabled.
; Exit with es:di -> iocb.
les di, send_head ; Get head segment:offset
endm

; Bits in sys_features
SYS_MCA equ 02 ; a micro channel computer
TWO_8259 equ 40h ; 2nd 8259 exists

; Bits in flagbyte
CALLED_ETOPEN equ 1 ; have called etopen
D_OPTION equ 2 ; delayed initialization
N_OPTION equ 4 ; Novell protocol conversion
W_OPTION equ 8 ; Windows upcall checking.
U_OPTION equ 10h ; Terminate the driver.