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163 lines
3.1 KiB
ArmAsm
163 lines
3.1 KiB
ArmAsm
;#############
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;
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; This will boot a C64 with RR-NET from the network
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; requires
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; 1) a DHCP server, and
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; 2) a TFTP server that responds to requests on the broadcast address (255.255.255.255) and that will serve a file called 'BOOTC64.PRG'.
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; the prg file can be either BASIC or M/L, and up to 30K in length.
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;
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; jonno@jamtronix.com - January 2009
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;
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.include "../inc/common.i"
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.include "../inc/commonprint.i"
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.include "../inc/net.i"
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.importzp tftp_filename
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.import tftp_load_address
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.import tftp_ip
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.import tftp_download
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.import cfg_tftp_server
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.import copymem
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.importzp copy_src
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.importzp copy_dest
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.import __DATA_LOAD__
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.import __DATA_RUN__
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.import __DATA_SIZE__
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.bss
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temp_bin: .res 1
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temp_bcd: .res 2
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bin_file_jmp: .res 3
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.segment "CARTRIDGE_HEADER"
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.word init ;cold start vector
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.word init ;warm start vector
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.byte $C3,$C2,$CD,$38,$30 ; "CBM80"
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.code
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init:
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;first let the kernal do a normal startup
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sei
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jsr $fda3 ;initialize CIA I/O
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jsr $fd50 ;RAM test, set pointers
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jsr $fd15 ;set vectors for KERNAL
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jsr $ff5B ;init. VIC
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cli ;KERNAL init. finished
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jsr $e453 ;set BASIC vectors
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jsr $e3bf ;initialize zero page
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ldax #startup_msg
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jsr print
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;relocate our r/w data
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ldax #__DATA_LOAD__
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stax copy_src
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ldax #__DATA_RUN__
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stax copy_dest
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ldax #__DATA_SIZE__
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jsr copymem
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init_ip_via_dhcp
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jsr print_ip_config
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ldx #3
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:
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lda cfg_tftp_server,x
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sta tftp_ip,x
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dex
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bpl :-
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ldax #$0000 ;load address will be first 2 bytes of file we dowload (LO/HI order)
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stax tftp_load_address
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ldax #downloading_msg
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jsr print
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ldax #tftp_file
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jsr download
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bcc @file_downloaded_ok
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jmp bad_boot
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@file_downloaded_ok:
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;check whether the file we just downloaded was a BASIC prg
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lda tftp_load_address
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cmp #01
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bne @not_a_basic_file
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lda tftp_load_address+1
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cmp #$08
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bne @not_a_basic_file
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jsr $e453 ;set BASIC vectors
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jsr $e3bf ;initialize BASIC
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jsr $a86e
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jsr $a533 ; re-bind BASIC lines
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ldx $22 ;load end-of-BASIC pointer (lo byte)
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ldy $23 ;load end-of-BASIC pointer (hi byte)
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stx $2d ;save end-of-BASIC pointer (lo byte)
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sty $2e ;save end-of-BASIC pointer (hi byte)
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jsr $a659 ; CLR (reset variables)
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jmp $a7ae ; jump to BASIC interpreter loop
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@not_a_basic_file:
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lda #$4C ;opcode for JMP
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sta bin_file_jmp
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ldax tftp_load_address
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stax bin_file_jmp+1
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jsr bin_file_jmp
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rts
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bad_boot:
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jmp bad_boot
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download:
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stax tftp_filename
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jsr print
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jsr print_cr
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jsr tftp_download
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bcc :+
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ldax #tftp_download_fail_msg
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jsr print
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sec
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rts
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:
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ldax #tftp_download_ok_msg
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jsr print
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clc
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rts
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.rodata
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startup_msg: .byte "RR-NET NETWORK BOOK CLIENT V0.1",13,0
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downloading_msg: .asciiz "DOWNLOADING "
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tftp_file:
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.asciiz "BOOTC64.PRG"
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tftp_download_fail_msg:
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.byte "DOWNLOAD FAILED", 13, 0
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tftp_download_ok_msg:
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.byte "DOWNLOAD OK", 13, 0
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