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11-s016.asm
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11-s016.asm
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;
; 11-s016.asm - stage two of boot loader for ardungeon
;
; This source code is copyright (c) 2008 Jason Duerstock
;
; The original program is copyright (c) 1987 Intellicreations Inc.
;
; This file is part of the ardungeon project which is an attempt to
; reverse engineer "Alternate Reality: The Dungeon" for the Atari 8-bit
; computer.
;
; ardungeon is free software; you can redistribute it and/or modify
; it under the terms of the GNU General Public License version 2
; as published by the Free Software Foundation.
;
; ardungeon is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
; GNU General Public License for more details.
;
; You should have received a copy of the GNU General Public License
; along with ardungeon; if not, write to the
; Free Software Foundation, Inc.
; 51 Franklin Street, Fifth Floor
; Boston, MA 02110-1301 USA
;
.include "equates.inc"
.include "macros.inc"
.SEGMENT "BOOTCONT"
byte_600 = $600
loc_2000 = $2000
byte_BD80 = $BD80
; .ORG $B000
loc_B000:
LDX loc_B000-1
LDA byte_B043,X
STA DAUX
dldi DBUF, byte_BD80
LDA #5
STA $80
JSR sub_B045
dldi SDLST, byte_B060
LDA $14
loc_B026: ; CODE XREF: RAM:B028vj
CMP $14
BEQ loc_B026
LDA #17
STA DAUX
dldi DBUF, byte_600
LDA #188
STA $80
JSR sub_B045
JMP $2000
; ---------------------------------------------------------------------------
byte_B043: .BYTE 11 ; DATA XREF: RAM:B003^r
.BYTE 6
; --------------- S U B R O U T I N E ---------------------------------------
sub_B045: ; CODE XREF: RAM:B017^p RAM:B03D^p ...
JSR DSKINV
BMI sub_B045
CLC
LDA DBUF
ADC #128
STA DBUF
BCC loc_B058
INC DBUF+1
loc_B058: ; CODE XREF: sub_B045+E^j
INC DAUX
DEC $80
BNE sub_B045
RTS
; End of function sub_B045
; ---------------------------------------------------------------------------
byte_B060: .BYTE $70 ; DATA XREF: RAM:B07Dvo
.BYTE $70 ; p
.BYTE $70 ; p
.BYTE $70 ; p
.BYTE $70 ; p
.BYTE $42
.WORD byte_BD80
.BYTE $70 ; p
.BYTE $70 ; p
.BYTE 2
.BYTE 2
.BYTE 2
.BYTE 2
.BYTE 2
.BYTE $70 ; p
.BYTE 2
.BYTE 2
.BYTE 2
.BYTE $70 ; p
.BYTE 2
.BYTE 2
.BYTE 2
.BYTE $70 ; p
.BYTE 2
.BYTE 2
.BYTE 2
.BYTE 2
.BYTE $41
.WORD byte_B060
.BYTE 0
; end of 'RAM'
.END