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added NB65_UNHOOK_VBL_IRQ function
git-svn-id: http://svn.code.sf.net/p/netboot65/code@80 93682198-c243-4bdb-bd91-e943c89aac3b
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@ -3,8 +3,16 @@
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NB65_API_VERSION=$0001
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NB65_DISPATCH_VECTOR = $800d
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NB65_PERIODIC_PROCESSING_VECTOR =$8010
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NB65_VBL_VECTOR =$8013
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NB65_PERIODIC_PROCESSING_VECTOR = $8010
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NB65_VBL_VECTOR = $8013
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;offsets in IP packet of various interesting bits:
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NB65_IP_SRC = 12 ;offset of "source address" field in an IP packet header
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NB65_IP_DEST = 16 ;offset of "destination address" field in an IP packet header
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NB65_UDP_SRC_PORT = 20 ;offset of udp source port field in ip packet
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NB65_UDP_DEST_PORT = 22 ;offset of udp source port field in ip packet
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NB65_UDP_DATA_LENGTH = 24 ;offset of length field in udp packet
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NB65_UDP_DATA = 28 ;offset of data in udp packet
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;offsets in NB65 configuration structure
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NB65_CFG_MAC = $00 ;6 byte MAC address
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@ -46,7 +54,8 @@ NB65_TFTP_DOWNLOAD =$06 ;inputs: AX points to a TFTP parameter struct
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NB65_DNS_RESOLVE_HOSTNAME =$07 ;inputs: AX points to a DNS parameter structure, outputs: DNS param structure updated with
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;NB65_DNS_HOSTNAME_IP updated with IP address corresponding to hostname.
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NB65_UDP_ADD_LISTENER =$08 ;inputs: AX points to a UDP listener parameter structure, outputs: none
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NB65_GET_INPUT_PACKET_PTR =$09 ;inputs: none, outputs: AX contains address of start of IP packet
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NB65_UNHOOK_VBL_IRQ =$0A ;inputs: none, outputs: none (removes call to NB65_VBL_VECTOR on IRQ chain)
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NB65_GET_LAST_ERROR =$FF ;no inputs, outputs A = error code (from last function that set the global error value, not necessarily the
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;last function that was called)
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@ -23,6 +23,9 @@
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.import dns_ip
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.import dns_resolve
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.import dns_set_hostname
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.import udp_callback
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.import udp_add_listener
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.import ip_inp
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.zeropage
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nb65_params: .res 2
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@ -177,10 +180,19 @@ irq_handler_installed:
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lda (nb65_params),y
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tax
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dey
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lda (nb65_params),y
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jmp udp_add_listener
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:
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cpy #NB65_GET_INPUT_PACKET_PTR
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bne :+
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ldax #ip_inp
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clc
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rts
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:
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cpy #NB65_GET_LAST_ERROR
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bne :+
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lda ip65_error
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@ -188,6 +200,16 @@ irq_handler_installed:
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rts
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:
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cpy #NB65_UNHOOK_VBL_IRQ
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bne :+
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ldax jmp_old_irq+1
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sei ;don't want any interrupts while we fiddle with the vector
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stax $314 ;previous IRQ handler
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cli
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clc
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rts
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:
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;default function handler
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lda #NB65_ERROR_FUNCTION_NOT_SUPPORTED
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sta ip65_error
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