emailler/drivers/vic20-rr-net.s

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2013-12-13 21:24:03 +00:00
; RR-Net driver, as seen on a VIC-20 (i.e. using a MasC=uerade adapter)
.export cs_init
.export cs_packet_page
.export cs_packet_data
.export cs_rxtx_data
.export cs_tx_cmd
.export cs_tx_len
.export eth_driver_name
.export eth_driver_io_base
rr_ctl = $9801 ;address of 'control' port on Retro-Replay
cs_packet_page = $9802 ;address of 'packet page' port on RR-Net
cs_packet_data = $9804;address of 'packet data' port on RR-Net
cs_rxtx_data = $9808 ;address of 'recieve/transmit data' port on RR-Net
cs_tx_cmd = $980c;address of 'transmit command' port on RR-Net
cs_tx_len = $980e;address of 'transmission length' port on RR-Net
.code
;initialise Retro Replay so we can access the network adapter
;inputs: none
;outputs: none
cs_init:
lda rr_ctl
ora #1
sta rr_ctl
rts
.rodata
eth_driver_name:
.asciiz "VIC20 RR-NET"
eth_driver_io_base:
.word rr_ctl-1
;-- LICENSE FOR vic20-rr-net.s --
; The contents of this file are subject to the Mozilla Public License
; Version 1.1 (the "License"); you may not use this file except in
; compliance with the License. You may obtain a copy of the License at
; http://www.mozilla.org/MPL/
;
; Software distributed under the License is distributed on an "AS IS"
; basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
; License for the specific language governing rights and limitations
; under the License.
;
; The Original Code is ip65.
;
; The Initial Developer of the Original Code is Jonno Downes,
; jonno@jamtronix.com.
; Portions created by the Initial Developer are Copyright (C) 2009
; Jonno Downes. All Rights Reserved.
; -- LICENSE END --