mirror of
https://github.com/xcat2/xNBA.git
synced 2024-11-25 19:08:35 +00:00
163 lines
3.2 KiB
ArmAsm
163 lines
3.2 KiB
ArmAsm
#if !defined(USE_NASM) && !defined(USE_AS86)
|
|
#define USE_AS86
|
|
#endif
|
|
|
|
#ifdef USE_AS86
|
|
#define CON(x) *x
|
|
#define BCON(x) *x
|
|
#define WCON(x) *x
|
|
#define LOC(x) x
|
|
#define BLOC(x) byte ptr x
|
|
#define WLOC(x) word ptr x
|
|
#define JMP(x) jmp x
|
|
#define STRDECL(s) .ascii s
|
|
#define SEGCS seg cs
|
|
#define SEGES seg es
|
|
#define ALIGN(x) .align x
|
|
#define SPACE(x) .space x
|
|
#endif
|
|
|
|
#ifdef USE_NASM
|
|
#define CON(x) x
|
|
#define BCON(x) byte x
|
|
#define WCON(x) word x
|
|
#define LOC(x) [x]
|
|
#define BLOC(x) byte [x]
|
|
#define WLOC(x) word [x]
|
|
#define JMP(x) jmp short x
|
|
#define STRDECL(s) db s
|
|
#define SEGCS cs
|
|
#define SEGES es
|
|
#define ALIGN(x) align x, db 0
|
|
#define SPACE(x) times x db 0
|
|
#endif
|
|
|
|
ROMLOAD equ 0x5000
|
|
|
|
start:
|
|
cli
|
|
xor ax, ax
|
|
mov ss, ax
|
|
mov sp, CON(0x7C00)
|
|
mov si, sp
|
|
mov es, ax
|
|
mov ds, ax
|
|
sti
|
|
cld
|
|
mov di, CON(0x600)
|
|
mov cx, CON(0x100)
|
|
rep
|
|
movsw
|
|
db 0xEA
|
|
dw jump
|
|
dw 0
|
|
jump:
|
|
mov si, CON(Hlaska)
|
|
call print
|
|
|
|
; rozmery prvniho HD
|
|
mov ah, CON(8)
|
|
mov dl, CON(0x80)
|
|
int 0x13
|
|
jc chyba
|
|
; dh - H, cx - CS
|
|
|
|
; prvi stopa obsahuje bootrom, tak ji natahneme do RAM
|
|
mov ah, CON(2)
|
|
mov al, cl
|
|
and al, CON(0x3F)
|
|
dec al
|
|
mov dx, CON(0x80)
|
|
mov cx, CON(2)
|
|
mov bx, CON(ROMLOAD)
|
|
mov es, bx
|
|
xor bx, bx
|
|
int 0x13
|
|
jc chyba
|
|
|
|
; hromada kodu podle zdrojaku netboot
|
|
xor di, di
|
|
mov es, di
|
|
mov di, CON(0x380)
|
|
push di
|
|
mov cx, CON(10)
|
|
cld
|
|
rep
|
|
stosw
|
|
pop di
|
|
#ifdef USE_AS86
|
|
mov word ptr [ di ], CON(0x5a5a)
|
|
mov byte ptr [ di + 2 ], CON(0x50)
|
|
mov word ptr [ di + 0x10 ], CON(0xFFFF)
|
|
mov word ptr [ di + 0x12 ], CON(0xFFFF)
|
|
#endif
|
|
#ifdef USE_NASM
|
|
mov word [ di ], CON(0x5a5a)
|
|
mov byte [ di + 2 ], CON(0x50)
|
|
mov word [ di + 10h ], CON(0xFFFF)
|
|
mov word [ di + 12h ], CON(0xFFFF)
|
|
#endif
|
|
|
|
; navratova adresa, kdyby nezabrala ROM
|
|
SEGCS
|
|
mov WLOC(OfsErr), CON(RomErr)
|
|
push cs
|
|
push WCON(chyba)
|
|
mov ax, CON(ROMLOAD)
|
|
mov es, ax
|
|
push es
|
|
; kouzelny jump....
|
|
SEGES
|
|
mov si, [ 0x1a ]
|
|
SEGES
|
|
#ifdef USE_AS86
|
|
push word ptr [ si + 0x1a ] ; ...do bootrom v RAM
|
|
#endif
|
|
#ifdef USE_NASM
|
|
push word [ si + 0x1a ] ; ...do bootrom v RAM
|
|
#endif
|
|
retf
|
|
|
|
chyba:
|
|
SEGCS
|
|
mov si, LOC(OfsErr)
|
|
call print
|
|
mov si, CON(CRLF)
|
|
call print
|
|
JMP(chyba)
|
|
|
|
print:
|
|
lodsb
|
|
cmp al,CON(0)
|
|
je navrat
|
|
push si
|
|
mov bx,CON(7)
|
|
mov ah,CON(0x0E)
|
|
int 0x10
|
|
pop si
|
|
JMP(print)
|
|
|
|
navrat:
|
|
ret
|
|
|
|
Hlaska: db 13, 10
|
|
STRDECL('HD Net Loader v1.0 (c) poli 1999')
|
|
db 13, 10, 0
|
|
CRLF: db 13, 10, 0
|
|
OfsErr: dw Error
|
|
Error: STRDECL('Error load from HD !')
|
|
db 0
|
|
RomErr: STRDECL('ROM Error !')
|
|
db 0
|
|
|
|
mbrend:
|
|
ret
|
|
|
|
#ifdef USE_AS86
|
|
org 510
|
|
#endif
|
|
#ifdef USE_NASM
|
|
times 510-($-$$) db 0
|
|
#endif
|
|
dw 0xAA55
|