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X-BOOT 3.1 - converts Atari 8-bit executables to bootable disk images.
This commit is contained in:
Piotr Fusik
parent
e496cc76f5
commit
35bf3f192d
195
xboot.asm
Normal file
195
xboot.asm
Normal file
@ -0,0 +1,195 @@
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; ><-B00T III b. Fox
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IDEAL
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P386
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MODEL TINY
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CODESEG
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ORG 100h
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include 'fox.mak'
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blen = 60*1024
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start:
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db 1024 dup(0) ;for COMpack
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print hello
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mov di, 81h
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movzx cx, [di-1]
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jcxz usg
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mov al, '?'
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repne scasb
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jne nousg
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usg: mov dx, offset usgtxt
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panic: print
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dos 4c01h
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getfil: mov ch, -1
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mov al, ' '
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repe scasb
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mov dx, offset fname
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lea si, [di-1]
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cmp [byte si], 0dh
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je usg
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mov di, dx
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movfn1: movsb
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cmp [si], al
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ja movfn1
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mov bx, di
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srchex: dec bx
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cmp [byte bx], '\'
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je addext
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cmp [byte bx], '.'
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je extexs
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cmp bx, dx
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ja srchex
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addext: xchg eax, ebp
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stosd
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extexs: mov [byte di], 0
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rts: ret
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smartdisk
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badf: mov dx, offset badtxt
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jmp panic
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nousg: mov ch, -1
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mov di, 81h
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mov al, ' '
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repe scasb
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mov ax, [di-1]
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inc di
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or ah, 20h
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cmp ax, 'p/'
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je romsw
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dec [romfl]
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mov di, 81h
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romsw: mov ebp, 'moc.'
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call getfil
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push si
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fopen
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mov cx, blen
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fread bufr
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mov dx, offset lontxt
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cmp ax, blen
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jnb panic
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mov [len], ax
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fclose
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mov si, offset bufr
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mov di, si
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lodsw
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cmp ax, -1
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jne badf
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mov ax, [si]
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mov [l1runl], al
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mov [l2runl], al
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mov [l1runh], ah
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mov [l2runh], ah
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cutf1: lodsw
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cmp ax, -1
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je cutf1
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stosw
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sta bx
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lodsw
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stosw
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sub ax, bx
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jb badf
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inc ax
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sta cx
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rep movsb
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cutfn: mov ax, si
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sub ax, offset bufr
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cmp ax, [len]
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jb cutf1
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mov si, offset endseq1
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cmp [romfl], 0
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jz stdld
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push di
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mov si, offset romlod
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mov di, offset sect
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mov cx, 64
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rep movsw
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pop di
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mov si, offset endseq2
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stdld: mov cx, endlen
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rep movsb
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mov cx, offset sect
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sub cx, di
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and cx, 7fh
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xor al, al
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rep stosb
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sub di, offset begin
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mov [len], di
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shr di, 4
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dec di
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mov [paras], di
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pop di
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mov ebp, 'rta.'
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call getfil
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fcreate
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mov cx, [len]
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mov dx, offset begin
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fwrite
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fclose
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print oktxt
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dos 4c00h
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; Poetry
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hello db 'X-BOOT 3.1 by Fox/Taquart',eot
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usgtxt db 'Converts Atari 8-bit executable into .ATR disk image.',eol
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db 'Usage: XBOOT [/p] comfile atrfile',eol
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db 'Use /p switch to write professional loader rather than standard.',eot
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oktxt db 'O.K.',eot
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badtxt db 'Bad format of file!',eot
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lontxt db 'File too long',eot
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smarterr
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romfl db 1
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; Ending Header for loader #1
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endseq1 db 233,7,235,7,108,224,2
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; Ending Header for loader #2
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endseq2 db 244,4,246,4,108,224,2
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endlen = $-endseq2
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; Loader #2 (rom)
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romlod: db 96,1,128,4,119,228,169,0,141,47,2
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db 169,82,141,200,2,165,20,197,20,240,252,169
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l2runl db 128,141,224,2,169
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l2runh db 4,141,225,2,160,254,169,128,141,226,2,169,4,141,227,2,162,251,149
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db 72,232,134,67,76,188,4,230,68,208,2,230,69,200,16,32,238,10
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db 3,208,3,238,11,3,169,255,141,1,211,78,14,212,88,32,83,228
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db 56,48,170,160,0,120,140,14,212,206,1,211,185,0,4,166,67,208
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db 200,129,68,165,68,197,70,208,200,165,69,197,71,208,194,152,72,32
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db 253,4,104,168,16,165,108,226,2
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; ATR Header
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begin dw 296h
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paras dw 0
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dw 80h,5 dup(0)
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; Atari Boot Sector(s)
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sect:
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; Loader #1 (std)
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db 96,1,128,7,119,228,160,215,185,30,7
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db 145,88,200,192,226,144,246,169
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l1runl db 128,141,224,2,169
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l1runh db 7,141,225,2,169
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db 7,141,5,3,160,255,140,1,211,136,169,128,141,226,2,169,7,141
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db 227,2,162,251,149,72,232,134,67,76,193,7,230,68,208,2,230,69
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db 200,16,16,238,10,3,208,3,238,11,3,32,83,228,56,48,174,160
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db 0,185,0,7,166,67,208,216,129,68,165,68,197,70,208,216,165,69
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db 197,71,208,210,152,72,32,242,7,104,168,16,181,108,226,2,44,111
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db 97,100,105,110,103,14,14,14,0
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beglen = $-begin
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bufr db blen dup(?)
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len dw ?
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fname db 128 dup(?)
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ENDS
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END start
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12
xboot.txt
Normal file
12
xboot.txt
Normal file
@ -0,0 +1,12 @@
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X-Boot 3.1 by Fox/Taquart
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Some (un)important notes
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-------------------------
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This tool converts Atari executable (.COM) into Atari disk image (.ATR).
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Produced ATR is single density and as short as possible. It has a loader
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in one boot sector. You can choose one of two built-in loaders:
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standard and professional. Professional loader allows you to load code/data
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under ROM and disables ROM and interrupts while starting program.
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Both loaders disable Atari Basic. For details, view sources of loaders.
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X-Boot does not write your program in ATR as Atari file, you can only run it
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by booting.
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---
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79
xbootpro.asx
Normal file
79
xbootpro.asx
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@ -0,0 +1,79 @@
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* Boot executable file loader coded by Fox/Taquart
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* Version for professionals - can load file under ROM.
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* Note interrupts and ROM are disabled when running loaded program.
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org $480
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bufr equ $400
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tp equ $43
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vc equ $44
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* Boot header
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boot equ *
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rts rts
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dta b(1),a(boot,$e477)
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* Nice blank screen
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lda #0
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sta $22f
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lda #$52
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sta $2c8
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lda 20
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cmp 20
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beq *-2
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* Init run vector
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lda <rts
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sta $2e0
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lda >rts
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sta $2e1
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ldy #$fe
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* Load header
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lhead lda <rts
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sta $2e2
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lda >rts
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sta $2e3
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ldx <-5
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* Store byte of header
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hput sta vc+4,x
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inx
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stx tp
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jmp get
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next inw vc
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get iny
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bpl getx
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inw $30a
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lda #$ff
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sta ^31
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lsr ^4e
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cli
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jsr $e453
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sec
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bmi rts
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ldy #0
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sei
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sty ^4e
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dec ^31
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getx lda bufr,y
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ldx tp
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bne hput
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sta (vc,x)
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lda vc
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cmp vc+2
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bne next
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lda vc+1
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cmp vc+3
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bne next
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endseq tya
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pha
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jsr init
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pla
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tay
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bpl lhead !
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init jmp ($2e2)
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* This will be added at the end of loaded file
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org endseq
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jmp ($2e0)
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end
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78
xbootstd.asx
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78
xbootstd.asx
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@ -0,0 +1,78 @@
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* Boot executable file loader coded by Fox/Taquart
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* Standard loader - ROM and interrupts enabled.
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org $780
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bufr equ $700
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tp equ $43
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vc equ $44
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* Boot header
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boot equ *
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rts rts
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dta b(1),a(boot,$e477)
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* Print text
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txtpos equ 215
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ldy #txtpos
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print lda text-txtpos,y
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sta ($58),y
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iny
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cpy #txtpos+txtlen
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bcc print
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* Init run vector
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lda <rts
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sta $2e0
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lda >rts
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sta $2e1
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lda >bufr
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sta $305
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ldy #$ff
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sty ^31
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dey #$fe
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* Load header
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lhead lda <rts
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sta $2e2
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lda >rts
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sta $2e3
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ldx <-5
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* Store byte of header
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hput sta vc+4,x
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inx
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stx tp
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jmp get
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next inw vc
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get iny
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bpl getx
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inw $30a
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jsr $e453
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sec
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bmi rts
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ldy #0
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getx lda bufr,y
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ldx tp
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bne hput
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sta (vc,x)
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lda vc
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cmp vc+2
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bne next
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lda vc+1
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cmp vc+3
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bne next
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endseq tya
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pha
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jsr init
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pla
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tay
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bpl lhead !
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init jmp ($2e2)
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text dta d'Loading... '
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txtlen equ *-text
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* This will be added at the end of loaded file
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org endseq
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jmp ($2e0)
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end
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