File : drivers/vic20-rr-net.s

 RR-Net driver, as seen on a VIC-20 (i.e. using a MasC=uerade adapter)

functions

initialise Retro Replay so we can access the network adapter
inputs: none
outputs: none

constants

implementation

; 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 --