WebSVN – Kolibri OS – Diff – /kernel/trunk/boot/bootcode.inc



;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;                                                              ;;
;; Copyright (C) KolibriOS team 2004-2024. All rights reserved. ;;
;; Copyright (C) MenuetOS 2000-2004 Ville Mikael Turjanmaa      ;;
;; Distributed under terms of the GNU General Public License    ;;
;;                                                              ;;
;;  BOOTCODE.INC                                                ;;
;;                                                              ;;
;;  KolibriOS 16-bit loader,                                    ;;
;;                        based on bootcode for MenuetOS        ;;
;;                                                              ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

 
 

 
 
;==========================================================================
;

        push    word [es:bp+2]
        pop     word [y_save]
        push    word [es:bp+6]
        pop     word [number_vm]
        mov     word [preboot_graph], bp          ;save choose
 
        jmp     .d

 
.change_b:                      ; b) preboot_biosdisk  = use BIOS disks through V86 emulation?
;        _setcursor 16,0

        mov     al, [preboot_debug]
        mov     [es:BOOT_LO.debug_print], al       ;// 0x901E

 
; Start the first app (right now it's LAUNCHER) after kernel is loaded?
        mov     al, [preboot_launcher]

        mov     [es:BOOT_LO.launcher_start], al    ;// 0x901D

 
; BOOT DEVICE

        mov     bx, 0xB000

 
; and copy them to extended memory
        mov     si, movedesc
        mov     [si+8*2+3], bh          ; from
 
        mov     ax, word [BPB_BytsPerSec]
        shr     ax, 1                   ; words per sector
        mov     cx, word [BPB_RsvdSecCnt]
        add     cx, word [BPB_FATSz16]
        mul     cx
        push    ax                      ; save to stack count of words in boot+FAT
        xchg    ax, cx
 
        push    es
        push    ds
        pop     es
        mov     ah, 0x87

 
; copy first FAT to second copy
; TODO: BPB_NumFATs !!!!!
        add     bx, word [BPB_BytsPerSec]       ; !!! TODO: may be need multiply by BPB_RsvdSecCnt !!!
        mov     byte [si+8*2+3], bh     ; bx - begin of FAT
 
        mov     ax, word [BPB_BytsPerSec]
        shr     ax, 1                   ; words per sector
        mov     cx, word [BPB_FATSz16]
        mul     cx

        mov     ah, 0x87
        int     0x15
        pop     es
        test    ah, ah
        jnz     sayerr_floppy
 
        mov     ax, cx
        shl     ax, 1
        and     eax, 0ffffh             ; ax - count of bytes in FAT
        add     dword [si+8*3+2], eax
 
; reading RootDir
; TODO: BPB_NumFATs
        add     bx, ax
        add     bx, 100h
        and     bx, 0ff00h                      ; bx - place in buffer to write RootDir

 
        mov     word [FirstDataSector], ax
        pop     bx
        push    bx
        add     word [FirstDataSector], bx      ; Begin of data region of floppy
 
; read RootDir
        call    conv_abs_to_THS
        pop     ax
        pop     bx                              ; place in buffer to write

Rev 9958	Rev 10051
Line 1...	Line 1...
1	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;	1	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
2	;; ;;	2	;; ;;
3	;; Copyright (C) KolibriOS team 2004-2015. All rights reserved. ;;	3	;; Copyright (C) KolibriOS team 2004-2024. All rights reserved. ;;
4	;; Copyright (C) MenuetOS 2000-2004 Ville Mikael Turjanmaa ;;	4	;; Copyright (C) MenuetOS 2000-2004 Ville Mikael Turjanmaa ;;
5	;; Distributed under terms of the GNU General Public License ;;	5	;; Distributed under terms of the GNU General Public License ;;
6	;; ;;	6	;; ;;
7	;; BOOTCODE.INC ;;	7	;; BOOTCODE.INC ;;
8	;; ;;	8	;; ;;
9	;; KolibriOS 16-bit loader, ;;	9	;; KolibriOS 16-bit loader, ;;
10	;; based on bootcode for MenuetOS ;;	10	;; based on bootcode for MenuetOS ;;
11	;; ;;	11	;; ;;
12	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;	12	;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
Line 13...	Line -...
13		-
14	$Revision: 9958 $	-
Line 15...	Line 13...
15		13
16		14
17	;==========================================================================	15	;==========================================================================
18	;	16	;
Line 803...	Line 801...
803	push word [es:bp+2]	801	push word [es:bp+2]
804	pop word [y_save]	802	pop word [y_save]
805	push word [es:bp+6]	803	push word [es:bp+6]
806	pop word [number_vm]	804	pop word [number_vm]
807	mov word [preboot_graph], bp ;save choose	805	mov word [preboot_graph], bp ;save choose
808		806
809	jmp .d	807	jmp .d
Line 810...	Line 808...
810		808
811	.change_b: ; b) preboot_biosdisk = use BIOS disks through V86 emulation?	809	.change_b: ; b) preboot_biosdisk = use BIOS disks through V86 emulation?
812	; _setcursor 16,0	810	; _setcursor 16,0
Line 1010...	Line 1008...
1010	mov al, [preboot_debug]	1008	mov al, [preboot_debug]
1011	mov [es:BOOT_LO.debug_print], al ;// 0x901E	1009	mov [es:BOOT_LO.debug_print], al ;// 0x901E
Line 1012...	Line 1010...
1012		1010
1013	; Start the first app (right now it's LAUNCHER) after kernel is loaded?	1011	; Start the first app (right now it's LAUNCHER) after kernel is loaded?
1014	mov al, [preboot_launcher]	1012	mov al, [preboot_launcher]
Line 1015...	Line 1013...
1015	mov [es:BOOT_LO.launcher_start], al ;// 0x901D	1013	mov [es:BOOT_LO.launcher_start], al ;// 0x901D
Line 1016...	Line 1014...
1016		1014
1017	; BOOT DEVICE	1015	; BOOT DEVICE
Line 1166...	Line 1164...
1166	mov bx, 0xB000	1164	mov bx, 0xB000
Line 1167...	Line 1165...
1167		1165
1168	; and copy them to extended memory	1166	; and copy them to extended memory
1169	mov si, movedesc	1167	mov si, movedesc
1170	mov [si+8*2+3], bh ; from	1168	mov [si+8*2+3], bh ; from
1171		1169
1172	mov ax, word [BPB_BytsPerSec]	1170	mov ax, word [BPB_BytsPerSec]
1173	shr ax, 1 ; words per sector	1171	shr ax, 1 ; words per sector
1174	mov cx, word [BPB_RsvdSecCnt]	1172	mov cx, word [BPB_RsvdSecCnt]
1175	add cx, word [BPB_FATSz16]	1173	add cx, word [BPB_FATSz16]
1176	mul cx	1174	mul cx
1177	push ax ; save to stack count of words in boot+FAT	1175	push ax ; save to stack count of words in boot+FAT
1178	xchg ax, cx	1176	xchg ax, cx
1179		1177
1180	push es	1178	push es
1181	push ds	1179	push ds
1182	pop es	1180	pop es
1183	mov ah, 0x87	1181	mov ah, 0x87
Line 1200...	Line 1198...
1200		1198
1201	; copy first FAT to second copy	1199	; copy first FAT to second copy
1202	; TODO: BPB_NumFATs !!!!!	1200	; TODO: BPB_NumFATs !!!!!
1203	add bx, word [BPB_BytsPerSec] ; !!! TODO: may be need multiply by BPB_RsvdSecCnt !!!	1201	add bx, word [BPB_BytsPerSec] ; !!! TODO: may be need multiply by BPB_RsvdSecCnt !!!
1204	mov byte [si+8*2+3], bh ; bx - begin of FAT	1202	mov byte [si+8*2+3], bh ; bx - begin of FAT
1205		1203
1206	mov ax, word [BPB_BytsPerSec]	1204	mov ax, word [BPB_BytsPerSec]
1207	shr ax, 1 ; words per sector	1205	shr ax, 1 ; words per sector
1208	mov cx, word [BPB_FATSz16]	1206	mov cx, word [BPB_FATSz16]
1209	mul cx	1207	mul cx
Line 1215...	Line 1213...
1215	mov ah, 0x87	1213	mov ah, 0x87
1216	int 0x15	1214	int 0x15
1217	pop es	1215	pop es
1218	test ah, ah	1216	test ah, ah
1219	jnz sayerr_floppy	1217	jnz sayerr_floppy
1220		1218
1221	mov ax, cx	1219	mov ax, cx
1222	shl ax, 1	1220	shl ax, 1
1223	and eax, 0ffffh ; ax - count of bytes in FAT	1221	and eax, 0ffffh ; ax - count of bytes in FAT
1224	add dword [si+8*3+2], eax	1222	add dword [si+8*3+2], eax
1225		1223
1226	; reading RootDir	1224	; reading RootDir
1227	; TODO: BPB_NumFATs	1225	; TODO: BPB_NumFATs
1228	add bx, ax	1226	add bx, ax
1229	add bx, 100h	1227	add bx, 100h
1230	and bx, 0ff00h ; bx - place in buffer to write RootDir	1228	and bx, 0ff00h ; bx - place in buffer to write RootDir
Line 1245...	Line 1243...
1245		1243
1246	mov word [FirstDataSector], ax	1244	mov word [FirstDataSector], ax
1247	pop bx	1245	pop bx
1248	push bx	1246	push bx
1249	add word [FirstDataSector], bx ; Begin of data region of floppy	1247	add word [FirstDataSector], bx ; Begin of data region of floppy
1250		1248
1251	; read RootDir	1249	; read RootDir
1252	call conv_abs_to_THS	1250	call conv_abs_to_THS
1253	pop ax	1251	pop ax
1254	pop bx ; place in buffer to write	1252	pop bx ; place in buffer to write

Subversion Repositories Kolibri OS

(root)/kernel/trunk/boot/bootcode.inc @ 3539 – Rev 9958 → 10051