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https://github.com/bobbimanners/emailler.git
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5218deb352
git-svn-id: http://svn.code.sf.net/p/netboot65/code@207 93682198-c243-4bdb-bd91-e943c89aac3b
256 lines
5.4 KiB
NASM
256 lines
5.4 KiB
NASM
;NB65 API example in DASM format (http://www.atari2600.org/DASM/)
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processor 6502
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include "../inc/nb65_constants.i"
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;useful macros
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mac ldax
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lda [{1}]
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ldx [{1}]+1
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endm
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mac ldaxi
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lda #<[{1}]
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ldx #>[{1}]
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endm
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mac stax
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sta [{1}]
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stx [{1}]+1
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endm
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mac cout
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lda [{1}]
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jsr print_a
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endm
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mac print_cr
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cout #13
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jsr print_a
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endm
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mac nb65call
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ldy [{1}]
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jsr NB65_DISPATCH_VECTOR
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endm
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mac print
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ldaxi [{1}]
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ldy #NB65_PRINT_ASCIIZ
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jsr NB65_DISPATCH_VECTOR
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endm
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;some routines & zero page variables
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print_a equ $ffd2
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temp_ptr equ $FB ; scratch space in page zero
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;start of code
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;BASIC stub
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org $801
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dc.b $0b,$08,$d4,$07,$9e,$32,$30,$36,$31,$00,$00,$00
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ldaxi #NB65_CART_SIGNATURE ;where signature should be in cartridge (if cart is banked in)
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jsr look_for_signature
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bcc found_nb65_signature
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ldaxi #NB65_RAM_STUB_SIGNATURE ;where signature should be in a RAM stub
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jsr look_for_signature
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bcs nb65_signature_not_found
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jsr NB65_RAM_STUB_ACTIVATE ;we need to turn on NB65 cartridge
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jmp found_nb65_signature
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nb65_signature_not_found
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ldaxi #nb65_api_not_found_message
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jsr print_ax
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rts
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found_nb65_signature
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print #initializing
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nb65call #NB65_INITIALIZE
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bcc .init_ok
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print_cr
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print #failed
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print_cr
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jsr print_errorcode
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jmp reset_after_keypress
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.init_ok
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;if we got here, we have found the NB65 API and initialised the IP stack
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;print out the current configuration
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nb65call #NB65_PRINT_IP_CONFIG
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;now set up for the nb65callback test
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ldaxi #64 ;listen on port 64
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stax nb65_param_buffer+NB65_UDP_LISTENER_PORT
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ldaxi #udp_nb65callback
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stax nb65_param_buffer+NB65_UDP_LISTENER_CALLBACK
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ldaxi #nb65_param_buffer
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nb65call #NB65_UDP_ADD_LISTENER
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bcc .add_listener_ok
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print #failed
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jsr print_errorcode
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jmp reset_after_keypress
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.add_listener_ok
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print #listening
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.loop_forever
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jsr NB65_PERIODIC_PROCESSING_VECTOR
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jmp .loop_forever
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;here is the code that will execute whenever a UDP packet arrives on port 64
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udp_nb65callback subroutine
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ldaxi #nb65_param_buffer
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nb65call #NB65_GET_INPUT_PACKET_INFO
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print_cr
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print #recv_from
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ldaxi #nb65_param_buffer+NB65_REMOTE_IP
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nb65call #NB65_PRINT_DOTTED_QUAD
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print #port
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lda nb65_param_buffer+NB65_REMOTE_PORT+1
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nb65call #NB65_PRINT_HEX
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lda nb65_param_buffer+NB65_REMOTE_PORT
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nb65call #NB65_PRINT_HEX
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print_cr
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print #length
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lda nb65_param_buffer+NB65_PAYLOAD_LENGTH+1
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nb65call #NB65_PRINT_HEX
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lda nb65_param_buffer+NB65_PAYLOAD_LENGTH
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nb65call #NB65_PRINT_HEX
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print_cr
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print #data
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ldax nb65_param_buffer+NB65_PAYLOAD_POINTER
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stax temp_ptr
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ldx nb65_param_buffer+NB65_PAYLOAD_LENGTH ;assumes length is < 255
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ldy #0
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.next_byte
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lda (temp_ptr),y
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jsr print_a
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iny
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dex
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bpl .next_byte
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print_cr
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;make and send a reply
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ldaxi #reply_message
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stax nb65_param_buffer+NB65_PAYLOAD_POINTER
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ldaxi #reply_message_length
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stax nb65_param_buffer+NB65_PAYLOAD_LENGTH
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ldaxi #nb65_param_buffer
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nb65call #NB65_SEND_UDP_PACKET
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bcc .sent_ok
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jmp print_errorcode
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.sent_ok
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print #reply_sent
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rts
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;look for NB65 signature at location pointed at by AX
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look_for_signature subroutine
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stax temp_ptr
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ldy #3
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.check_one_byte
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lda (temp_ptr),y
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cmp nb65_signature,y
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bne .bad_match
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dey
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bpl .check_one_byte
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clc
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rts
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.bad_match
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sec
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rts
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print_ax subroutine
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stax temp_ptr
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ldy #0
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.next_char
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lda (temp_ptr),y
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beq .done
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jsr print_a
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iny
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jmp .next_char
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.done
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rts
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get_key
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jsr $ffe4
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cmp #0
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beq get_key
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rts
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reset_after_keypress
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print #press_a_key_to_continue
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jsr get_key
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jmp $fce2 ;do a cold start
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print_errorcode
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print #error_code
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nb65call #NB65_GET_LAST_ERROR
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nb65call #NB65_PRINT_HEX
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print_cr
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rts
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;constants
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nb65_api_not_found_message dc.b "ERROR - NB65 API NOT FOUND.",13,0
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nb65_signature dc.b $4E,$42,$36,$35 ; "NB65" - API signature
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initializing dc.b "INITIALIZING ",13,0
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error_code dc.b "ERROR CODE: $",0
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press_a_key_to_continue dc.b "PRESS A KEY TO CONTINUE",13,0
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failed dc.b "FAILED ", 0
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ok dc.b "OK ", 0
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recv_from dc.b"RECEIVED FROM: ",0
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listening dc.b "LISTENING ON UDP PORT 64",13,0
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reply_sent dc.b "REPLY SENT.",0
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port dc.b " PORT: $",0
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length dc.b "LENGTH: $",0
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data dc.b "DATA: ",0
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space_colon_space dc.b " : ",0
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reply_message dc.b "PONG!"
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reply_message_length equ 5
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;variables
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nb65_param_buffer DS.B $20
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;-- LICENSE FOR dasm_example.asm --
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; The contents of this file are subject to the Mozilla Public License
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; Version 1.1 (the "License"); you may not use this file except in
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; compliance with the License. You may obtain a copy of the License at
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; http://www.mozilla.org/MPL/
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;
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; Software distributed under the License is distributed on an "AS IS"
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; basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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; License for the specific language governing rights and limitations
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; under the License.
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;
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; The Original Code is ip65.
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;
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; The Initial Developer of the Original Code is Jonno Downes,
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; jonno@jamtronix.com.
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; Portions created by the Initial Developer are Copyright (C) 2009
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; Jonno Downes. All Rights Reserved.
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; -- LICENSE END --
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