;this is some very quick and dirty glue to make the most useful IP65 functions available via a single entry point. ;this allows user applications to be developed that don't link ip65 in directly, rather they use an instance of ip65 that is preloaded (or in a cartridge/ROM) ;this whole file could (and should) be greatly optimised by making it all table driven, but since this file is probably only going to be used in a bankswitched ROM where ;space is not at such a premium, I'll go with the gross hack for now. .ifndef NB65_API_VERSION_NUMBER .define EQU = .include "../inc/nb65_constants.i" .endif .include "../inc/common.i" .include "../inc/commonprint.i" .export nb65_dispatcher .import ip65_init .import dhcp_init .import cfg_get_configuration_ptr .import tftp_load_address .importzp tftp_filename .import tftp_ip .import tftp_directory_listing .import ip65_error .import tftp_clear_callbacks .import tftp_download .import tftp_upload .import tftp_set_callback_vector .import tftp_filesize .import dns_ip .import dns_resolve .import dns_set_hostname .import udp_callback .import udp_add_listener .import ip_inp .import udp_inp .import udp_send .import udp_send_src .import udp_send_src_port .import udp_send_dest .import udp_send_dest_port .import udp_send_len .import copymem .import cfg_mac .importzp copy_src .importzp copy_dest ;reuse the copy_src zero page location nb65_params = copy_src .data jmp_old_irq: jmp $0000 irq_handler_installed_flag: .byte 0 .code irq_handler: jsr NB65_VBL_VECTOR jmp jmp_old_irq set_tftp_params: ldy #NB65_TFTP_IP lda (nb65_params),y sta tftp_ip iny lda (nb65_params),y sta tftp_ip+1 iny lda (nb65_params),y sta tftp_ip+2 iny lda (nb65_params),y sta tftp_ip+3 ldy #NB65_TFTP_FILENAME lda (nb65_params),y sta tftp_filename iny lda (nb65_params),y sta tftp_filename+1 ldy #NB65_TFTP_POINTER lda (nb65_params),y sta tftp_load_address iny lda (nb65_params),y sta tftp_load_address+1 jsr tftp_clear_callbacks rts set_tftp_callback_vector: ldy #NB65_TFTP_POINTER+1 lda (nb65_params),y tax dey lda (nb65_params),y jmp tftp_set_callback_vector nb65_dispatcher: stax nb65_params cpy #NB65_INITIALIZE bne :+ lda irq_handler_installed_flag bne irq_handler_installed jsr ip65_init bcs init_failed ;install our IRQ handler ldax $314 ;previous IRQ handler stax jmp_old_irq+1 sei ;don't want any interrupts while we fiddle with the vector ldax #irq_handler stax $314 ;previous IRQ handler sta irq_handler_installed_flag cli jsr dhcp_init bcc dhcp_ok jsr ip65_init ;if DHCP failed, then reinit the IP stack (which will reset IP address etc to cartridge default values) dhcp_ok: irq_handler_installed: clc init_failed: rts : cpy #NB65_GET_IP_CONFIG bne :+ ldax #cfg_mac clc rts : cpy #NB65_DNS_RESOLVE bne :+ phax ldy #NB65_DNS_HOSTNAME+1 lda (nb65_params),y tax dey lda (nb65_params),y jsr dns_set_hostname bcs @dns_error jsr dns_resolve bcs @dns_error ldy #NB65_DNS_HOSTNAME_IP ldx #4 plax stax nb65_params @copy_dns_ip: lda dns_ip,y sta (nb65_params),y iny dex bne @copy_dns_ip rts @dns_error: plax rts : cpy #NB65_UDP_ADD_LISTENER bne :+ ldy #NB65_UDP_LISTENER_CALLBACK lda (nb65_params),y sta udp_callback iny lda (nb65_params),y sta udp_callback+1 ldy #NB65_UDP_LISTENER_PORT+1 lda (nb65_params),y tax dey lda (nb65_params),y jmp udp_add_listener : cpy #NB65_GET_INPUT_PACKET_INFO bne :+ ldy #3 @copy_src_ip: lda ip_inp+12,y ;src IP sta (nb65_params),y dey bpl @copy_src_ip ldy #NB65_REMOTE_PORT lda udp_inp+1 ;src port (lo byte) sta (nb65_params),y iny lda udp_inp+0 ;src port (high byte) sta (nb65_params),y iny lda udp_inp+3 ;dest port (lo byte) sta (nb65_params),y iny lda udp_inp+2 ;dest port (high byte) sta (nb65_params),y iny sec lda udp_inp+5 ;payload length (lo byte) sbc #8 ;to remove length of header sta (nb65_params),y iny lda udp_inp+4 ;payload length (hi byte) sbc #0 ;in case there was a carry from the lo byte sta (nb65_params),y iny lda #<(udp_inp+8) ;payload ptr (lo byte) sta (nb65_params),y iny lda #>(udp_inp+8) ;payload ptr (hi byte) sta (nb65_params),y clc rts : cpy #NB65_SEND_UDP_PACKET bne :+ ldy #3 @copy_dest_ip: lda (nb65_params),y sta udp_send_dest,y dey bpl @copy_dest_ip ldy #NB65_REMOTE_PORT lda (nb65_params),y sta udp_send_dest_port iny lda (nb65_params),y sta udp_send_dest_port+1 iny lda (nb65_params),y sta udp_send_src_port iny lda (nb65_params),y sta udp_send_src_port+1 iny lda (nb65_params),y sta udp_send_len iny lda (nb65_params),y sta udp_send_len+1 iny ;AX should point at data to send lda (nb65_params),y pha iny lda (nb65_params),y tax pla jmp udp_send : cpy #NB65_DEACTIVATE bne :+ ldax jmp_old_irq+1 sei ;don't want any interrupts while we fiddle with the vector stax $314 ;previous IRQ handler cli clc rts : cpy #NB65_TFTP_DIRECTORY_LISTING bne :+ phax jsr set_tftp_params jsr tftp_directory_listing @after_tftp_call: ;write the current load address back to the param buffer (so if $0000 was passed in, the caller can find out the actual value used) plax bcs @tftp_error stax nb65_params ldy #NB65_TFTP_POINTER lda tftp_load_address sta (nb65_params),y iny lda tftp_load_address+1 sta (nb65_params),y ldy #NB65_TFTP_FILESIZE lda tftp_filesize sta (nb65_params),y iny lda tftp_filesize+1 sta (nb65_params),y clc @tftp_error: rts : cpy #NB65_TFTP_DOWNLOAD bne :+ phax jsr set_tftp_params jsr tftp_download jmp @after_tftp_call : cpy #NB65_TFTP_CALLBACK_DOWNLOAD bne :+ phax jsr set_tftp_params jsr set_tftp_callback_vector jsr tftp_download jmp @after_tftp_call : cpy #NB65_TFTP_UPLOAD bne :+ phax jsr set_tftp_params ldy #NB65_TFTP_POINTER lda (nb65_params),y sta tftp_filesize iny lda (nb65_params),y sta tftp_filesize+1 jsr tftp_download jmp @after_tftp_call : cpy #NB65_TFTP_CALLBACK_UPLOAD bne :+ jsr set_tftp_params jsr set_tftp_callback_vector jmp tftp_upload : cpy #NB65_PRINT_ASCIIZ bne :+ jsr print clc rts : cpy #NB65_PRINT_HEX bne :+ jsr print_hex clc rts : cpy #NB65_PRINT_DOTTED_QUAD bne :+ jsr print_dotted_quad clc rts : cpy #NB65_PRINT_IP_CONFIG bne :+ jsr print_ip_config clc rts : cpy #NB65_GET_LAST_ERROR bne :+ lda ip65_error clc rts : ;default function handler lda #NB65_ERROR_FUNCTION_NOT_SUPPORTED sta ip65_error sec ;carry flag set = error rts