2009-07-17 02:53:46 +00:00
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;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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;NO BASIC stub! needs to be direct booted via TFTP
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org $1000
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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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lda NB65_API_VERSION
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cmp #02
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bpl .version_ok
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print incorrect_version
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jmp reset_after_keypress
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.version_ok
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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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;prompt for a hostname, then resolve to an IP address
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.get_hostname
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print #remote_host
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nb65call #NB65_INPUT_HOSTNAME
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bcc .host_entered
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;if no host entered, then bail.
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2009-07-17 13:10:44 +00:00
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rts
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2009-07-17 02:53:46 +00:00
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.host_entered
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stax nb65_param_buffer
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print_cr
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print #resolving
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ldax nb65_param_buffer
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nb65call #NB65_PRINT_ASCIIZ
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print_cr
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ldaxi #nb65_param_buffer
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nb65call #NB65_DNS_RESOLVE
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bcc .resolved_ok
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print #failed
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print_cr
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jsr print_errorcode
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jmp .get_hostname
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.resolved_ok
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.get_port
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print #remote_port
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nb65call #NB65_INPUT_PORT_NUMBER
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bcc .port_entered
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;if no port entered, then assume port 23
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ldaxi #23
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.port_entered
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stax nb65_param_buffer+NB65_TCP_PORT
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2009-07-17 05:31:54 +00:00
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print_cr
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print #char_mode_prompt
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.char_mode_input
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jsr $ffe4
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cmp #"A"
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beq .ascii_mode
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cmp #"a"
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beq .ascii_mode
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cmp #"P"
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beq .petscii_mode
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cmp #"p"
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beq .petscii_mode
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jmp .char_mode_input
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.ascii_mode
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2009-07-17 13:10:44 +00:00
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lda #14
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jsr print_a ;switch to lower case
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2009-07-17 05:31:54 +00:00
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lda #0
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jmp .character_mode_set
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.petscii_mode
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2009-07-17 13:10:44 +00:00
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lda #142
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jsr print_a ;switch to upper case
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2009-07-17 05:31:54 +00:00
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lda #1
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.character_mode_set
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sta character_mode
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2009-07-17 13:10:44 +00:00
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lda #147 ; 'CLR/HOME'
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jsr print_a
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2009-07-17 02:53:46 +00:00
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ldaxi #tcp_callback
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stax nb65_param_buffer+NB65_TCP_CALLBACK
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print #connecting
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2009-07-17 13:10:44 +00:00
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lda character_mode
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beq .a_mode
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print #petscii
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jmp .c_mode
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.a_mode
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print #ascii
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.c_mode
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print #mode
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2009-07-17 02:53:46 +00:00
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ldaxi #nb65_param_buffer
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nb65call #NB65_TCP_CONNECT
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bcc .connect_ok
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print_cr
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print #failed
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jsr print_errorcode
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jmp .get_hostname
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.connect_ok
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print #ok
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2009-07-17 05:31:54 +00:00
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print_cr
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lda #0
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sta connection_closed
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.main_polling_loop
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2009-07-17 02:53:46 +00:00
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jsr NB65_PERIODIC_PROCESSING_VECTOR
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2009-07-17 05:31:54 +00:00
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lda connection_closed
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beq .not_disconnected
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print #disconnected
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jmp .get_hostname
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.not_disconnected
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;is there anything in the input buffer?
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lda $c6 ;NDX - chars in keyboard buffer
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beq .main_polling_loop
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2009-07-17 13:10:44 +00:00
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lda #0
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sta nb65_param_buffer+NB65_TCP_PAYLOAD_LENGTH
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sta nb65_param_buffer+NB65_TCP_PAYLOAD_LENGTH+1
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.get_next_char
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jsr $ffe4 ;getkey - 0 means no input
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tax
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beq .no_more_input
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cmp #$03 ;RUN/STOP
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bne .not_runstop
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lda #0
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sta $cb ;overwrite "current key pressed" else it's seen by the tcp stack and the close aborts
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print #closing_connection
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nb65call #NB65_TCP_CLOSE_CONNECTION
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bcs .error_on_disconnect
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print #disconnected
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jmp .get_hostname
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.error_on_disconnect
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jsr print_errorcode
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print_cr
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jmp .get_hostname
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.not_runstop
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2009-07-17 05:31:54 +00:00
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lda character_mode
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bne .no_conversion_required
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lda petscii_to_ascii_table,x
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tax
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2009-07-17 13:10:44 +00:00
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.no_conversion_required
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2009-07-17 05:31:54 +00:00
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txa
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2009-07-17 13:10:44 +00:00
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ldy nb65_param_buffer+NB65_TCP_PAYLOAD_LENGTH
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2009-07-17 05:31:54 +00:00
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sta output_buffer,y
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2009-07-17 13:10:44 +00:00
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inc nb65_param_buffer+NB65_TCP_PAYLOAD_LENGTH
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jmp .get_next_char
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.no_more_input
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ldaxi #output_buffer
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stax nb65_param_buffer+NB65_TCP_PAYLOAD_POINTER
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2009-07-17 05:31:54 +00:00
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ldaxi #nb65_param_buffer
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nb65call #NB65_SEND_TCP_PACKET
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bcs .error_on_send
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jmp .main_polling_loop
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2009-07-17 02:53:46 +00:00
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2009-07-17 05:31:54 +00:00
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.error_on_send
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print #transmission_error
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jsr print_errorcode
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jmp .get_hostname
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2009-07-17 02:53:46 +00:00
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;tcp callback - will be executed whenever data arrives on the TCP connection
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tcp_callback
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2009-07-17 05:31:54 +00:00
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ldaxi #nb65_param_buffer
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nb65call #NB65_GET_INPUT_PACKET_INFO
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lda nb65_param_buffer+NB65_PAYLOAD_LENGTH+1
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cmp #$ff
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bne .not_eof
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lda #1
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sta connection_closed
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rts
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.not_eof
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ldax nb65_param_buffer+NB65_PAYLOAD_POINTER
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stax temp_ptr
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2009-07-17 13:10:44 +00:00
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lda nb65_param_buffer+NB65_PAYLOAD_LENGTH ;assumes length of inbound data is < 255
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sta buffer_length
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dec buffer_length
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2009-07-17 05:31:54 +00:00
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ldy #0
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.next_byte
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2009-07-17 13:10:44 +00:00
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; tya
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; pha
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; lda (temp_ptr),y
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; nb65call #NB65_PRINT_HEX
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; pla
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; tay
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2009-07-17 05:31:54 +00:00
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lda (temp_ptr),y
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2009-07-17 13:10:44 +00:00
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tax
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lda character_mode
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bne .no_conversion_req
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lda ascii_to_petscii_table,x
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tax
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.no_conversion_req
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tya
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pha
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txa
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2009-07-17 05:31:54 +00:00
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jsr print_a
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2009-07-17 13:10:44 +00:00
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pla
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tay
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2009-07-17 05:31:54 +00:00
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iny
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2009-07-17 13:10:44 +00:00
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dec buffer_length
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bpl .next_byte
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2009-07-17 02:53:46 +00:00
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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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incorrect_version dc.b "ERROR - NB65 API MUST BE AT LEAST VERSION 2.",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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resolving dc.b "RESOLVING ",0
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2009-07-17 13:10:44 +00:00
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closing_connection dc.b "CLOSING CONNECTION",13,0
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connecting dc.b "CONNECTING IN ",0
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ascii dc.b "ASCII",0
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petscii dc.b "PETSCII",0
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mode dc.b " MODE",13,0
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2009-07-17 05:31:54 +00:00
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disconnected dc.b 13,"CONNECTION CLOSED",13,0
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2009-07-17 02:53:46 +00:00
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remote_host dc.b "REMOTE HOST - BLANK TO QUIT",13,": ",0
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remote_port dc.b "REMOTE PORT - BLANK FOR TELNET DEFAULT",13,": ",0
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2009-07-17 13:10:44 +00:00
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char_mode_prompt dc.b "CHARACTER MODE - A=ASCII, P=PETSCII",13,0
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2009-07-17 02:53:46 +00:00
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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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2009-07-17 05:31:54 +00:00
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transmission_error dc.b "ERROR WHILE SENDING ",0
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ascii_to_petscii_table
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dc.b $00,$01,$02,$03,$04,$05,$06,$07,$14,$09,$0d,$11,$93,$0a,$0e,$0f
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dc.b $10,$0b,$12,$13,$08,$15,$16,$17,$18,$19,$1a,$1b,$1c,$1d,$1e,$1f
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dc.b $20,$21,$22,$23,$24,$25,$26,$27,$28,$29,$2a,$2b,$2c,$2d,$2e,$2f
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dc.b $30,$31,$32,$33,$34,$35,$36,$37,$38,$39,$3a,$3b,$3c,$3d,$3e,$3f
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dc.b $40,$c1,$c2,$c3,$c4,$c5,$c6,$c7,$c8,$c9,$ca,$cb,$cc,$cd,$ce,$cf
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dc.b $d0,$d1,$d2,$d3,$d4,$d5,$d6,$d7,$d8,$d9,$da,$5b,$5c,$5d,$5e,$5f
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dc.b $c0,$41,$42,$43,$44,$45,$46,$47,$48,$49,$4a,$4b,$4c,$4d,$4e,$4f
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dc.b $50,$51,$52,$53,$54,$55,$56,$57,$58,$59,$5a,$db,$dc,$dd,$de,$df
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dc.b $80,$81,$82,$83,$84,$85,$86,$87,$88,$89,$8a,$8b,$8c,$8d,$8e,$8f
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dc.b $90,$91,$92,$0c,$94,$95,$96,$97,$98,$99,$9a,$9b,$9c,$9d,$9e,$9f
|
|
|
|
dc.b $a0,$a1,$a2,$a3,$a4,$a5,$a6,$a7,$a8,$a9,$aa,$ab,$ac,$ad,$ae,$af
|
|
|
|
dc.b $b0,$b1,$b2,$b3,$b4,$b5,$b6,$b7,$b8,$b9,$ba,$bb,$bc,$bd,$be,$bf
|
|
|
|
dc.b $60,$61,$62,$63,$64,$65,$66,$67,$68,$69,$6a,$6b,$6c,$6d,$6e,$6f
|
|
|
|
dc.b $70,$71,$72,$73,$74,$75,$76,$77,$78,$79,$7a,$7b,$7c,$7d,$7e,$7f
|
|
|
|
dc.b $e0,$e1,$e2,$e3,$e4,$e5,$e6,$e7,$e8,$e9,$ea,$eb,$ec,$ed,$ee,$ef
|
|
|
|
dc.b $f0,$f1,$f2,$f3,$f4,$f5,$f6,$f7,$f8,$f9,$fa,$fb,$fc,$fd,$fe,$ff
|
|
|
|
|
|
|
|
petscii_to_ascii_table
|
|
|
|
dc.b $00,$01,$02,$03,$04,$05,$06,$07,$14,$09,$0d,$11,$93,$0a,$0e,$0f
|
|
|
|
dc.b $10,$0b,$12,$13,$08,$15,$16,$17,$18,$19,$1a,$1b,$1c,$1d,$1e,$1f
|
|
|
|
dc.b $20,$21,$22,$23,$24,$25,$26,$27,$28,$29,$2a,$2b,$2c,$2d,$2e,$2f
|
|
|
|
dc.b $30,$31,$32,$33,$34,$35,$36,$37,$38,$39,$3a,$3b,$3c,$3d,$3e,$3f
|
|
|
|
dc.b $40,$61,$62,$63,$64,$65,$66,$67,$68,$69,$6a,$6b,$6c,$6d,$6e,$6f
|
|
|
|
dc.b $70,$71,$72,$73,$74,$75,$76,$77,$78,$79,$7a,$5b,$5c,$5d,$5e,$5f
|
|
|
|
dc.b $c0,$c1,$c2,$c3,$c4,$c5,$c6,$c7,$c8,$c9,$ca,$cb,$cc,$cd,$ce,$cf
|
|
|
|
dc.b $d0,$d1,$d2,$d3,$d4,$d5,$d6,$d7,$d8,$d9,$da,$db,$dc,$dd,$de,$df
|
|
|
|
dc.b $80,$81,$82,$83,$84,$85,$86,$87,$88,$89,$8a,$8b,$8c,$8d,$8e,$8f
|
|
|
|
dc.b $90,$91,$92,$0c,$94,$95,$96,$97,$98,$99,$9a,$9b,$9c,$9d,$9e,$9f
|
|
|
|
dc.b $a0,$a1,$a2,$a3,$a4,$a5,$a6,$a7,$a8,$a9,$aa,$ab,$ac,$ad,$ae,$af
|
|
|
|
dc.b $b0,$b1,$b2,$b3,$b4,$b5,$b6,$b7,$b8,$b9,$ba,$bb,$bc,$bd,$be,$bf
|
|
|
|
dc.b $60,$41,$42,$43,$44,$45,$46,$47,$48,$49,$4a,$4b,$4c,$4d,$4e,$4f
|
|
|
|
dc.b $50,$51,$52,$53,$54,$55,$56,$57,$58,$59,$5a,$7b,$7c,$7d,$7e,$7f
|
|
|
|
dc.b $a0,$a1,$a2,$a3,$a4,$a5,$a6,$a7,$a8,$a9,$aa,$ab,$ac,$ad,$ae,$af
|
|
|
|
dc.b $b0,$b1,$b2,$b3,$b4,$b5,$b6,$b7,$b8,$b9,$ba,$bb,$bc,$bd,$be,$bf
|
|
|
|
|
2009-07-17 02:53:46 +00:00
|
|
|
|
|
|
|
;variables
|
2009-07-17 05:31:54 +00:00
|
|
|
connection_closed ds.b 1
|
|
|
|
character_mode ds.b 1
|
2009-07-17 13:10:44 +00:00
|
|
|
buffer_offset: ds.b 1
|
2009-07-17 02:53:46 +00:00
|
|
|
nb65_param_buffer DS.B $20
|
2009-07-17 13:10:44 +00:00
|
|
|
buffer_length: ds.b 2
|
|
|
|
|
2009-07-17 05:31:54 +00:00
|
|
|
output_buffer: DS.B $100
|