Start to use this repo as submodule

notes.txt

@@ -11,11 +11,18 @@
 0x0017: mov cx, 0x200
 0x001a: rep movsb byte ptr es:[di], byte ptr [si]
 0x001c: ljmp 0:0x621
+
 0x0021: mov si, 0x7be
+
+
 0x0024: cmp byte ptr [si], al
 0x0026: jne 0x33
+
+
 0x0028: add si, 0x10
 0x002b: cmp si, 0x7fe
+
+
 0x002f: jne 0x24
 0x0031: jmp 0x49
 0x0033: mov ah, 2
@@ -27,3 +34,7 @@
 0x0042: int 0x13
 0x0044: ljmp 0:0x7c00
 0x0049: jmp 0x49
+
+// This is test for workshop.
+
+

slrboot.nasm

@@ -3,25 +3,28 @@ BITS 16
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ; SLRboot
 ; Bootloader for SingOS
-; version 0.2.0.0-exp
+; version 0.2.0.3-exp
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 cli
-mov [disk_identifier], dl
+jmp long 0x0000:start
+
+start:
 mov ax, 0x1000
 mov ss, ax
 mov sp, 0xb000
 mov ax, 0
 mov ds, ax
 mov es, ax
+mov [disk_identifier], dl
 sti
 mov si, 0x7c00
 mov di, 0x600
-mov cx, 0x200
+mov cx, 0x100
-rep movsb 
+rep movsw
 mov bx, relocated
 sub bx, 0x7600 ; Calculate the offset.
 push bx
-retf ; Return far
+ret ; Return far
 ;jmp long 0:bx
 
 relocated:
@@ -29,34 +32,29 @@ relocated:
 mov si, message ; Put address of the null-terminated string to output into 'si'
 call print      ; Call our string-printing routine
 
-;mov ax, 0x0050 
+mov bx, [partition_1.start_LBA]
-;mov es, ax                  ;Section to write into
+mov WORD [DAPACK.lba_addr_dw_low], bx
-;mov ah, 0x2                 ;Read sectors from drive
+mov bx, [partition_1.start_LBA + 1]
-;mov al, 0x08                ;Number of sectors to read (31 * 512 = 15872 bytes)
+mov WORD [DAPACK.lba_addr_dw_low + 1], bx
-;mov ch, 0x0                 ;Low 8 bits of cylinder
+mov bx, [partition_1.start_LBA + 2]
-;mov cl, 0x11                ;First sector to read (bits 0-5), upper bits of cylinder (bits 6-7)
+mov WORD [DAPACK.lba_addr_dw_low + 2], bx
-;mov dh, 0x0                 ;Head number
+mov bx, [partition_1.start_LBA + 3]
-;mov dl, [disk_identifier]   ;Drive number
+mov WORD [DAPACK.lba_addr_dw_low + 3], bx
-;mov bx, 0x0000               ;Offset into section
+mov WORD [DAPACK.blkcnt],          0x01  
-;int 0x13                    ;Low level disk services
+mov WORD [DAPACK.db_addr_segment], 0x0000
-mov ah, 2
+mov WORD [DAPACK.db_addr_offset],  0x7c00
-mov al, 0x08
+mov si, DAPACK                          ; address of "disk address packet"
-mov bx, 0x7c00
+mov ah, 0x42                            ; READ
-mov BYTE dl, [disk_identifier]
+mov dl, [disk_identifier] 
-mov BYTE dh, [partition_2.start_CHS + 1] ;byte [si + 1]
-mov BYTE cl, [partition_2.start_CHS + 2]
-mov BYTE ch, [partition_2.start_CHS]               ;First sector to read (bits 0-5), upper bits of cylinder (bits 6-7)
 int 0x13
-;mov ax, 0x0
+
-;mov ds, ax
-mov ax, 89 ; lba adress
 jmp long 0x0:0x7c00
 
 cli 
 hlt
 
 
-%IF 1
+%IF 0
 cli
 jmp long 0x0000:start
 
@@ -144,6 +142,15 @@ hlt
 
 .welcome_debug db 'This is debug mode', 0
 
+printCRLF:
+mov ah, 0xE
+mov al, 13
+int 0x10
+mov al, 10
+int 0x10
+ret
+%ENDIF
+
 ;Routine for printing a 'ax' as hex
 dumpax:
 pusha           ; save registers
@@ -166,14 +173,6 @@ loop .loop
 popa            ; restore registers
 ret
 
-printCRLF:
-mov ah, 0xE
-mov al, 13
-int 0x10
-mov al, 10
-int 0x10
-ret
-%ENDIF
 ; Routine for outputting string in 'si' register to screen
 print:
 mov ah, 0xE     ; Specify 'int 0x10' 'teletype output' function
@@ -188,27 +187,37 @@ jmp .printchar  ; Repeat for the next character
 ret
 
 data:
-message db 'SLRboot for SingOS! v0.2.0.0-exp',13,10,0
+message db 'SLRboot for SingOS! v0.2.0.3-exp',13,10,0
-enter_debug_mode db 'Press d to enter bootloader debug mode',13,10,0
+;enter_debug_mode db 'Press d to enter bootloader debug mode',13,10,0
-enter_system_check db 'Performing system check:',13,10,0
+;enter_system_check db 'Performing system check:',13,10,0
-sys_check_ok db 'System check ok', 13, 10, 0
+;sys_check_ok db 'System check ok', 13, 10, 0
-boot_system db 'Read SingOS from disk', 13, 10, 0
+;boot_system db 'Read SingOS from disk', 13, 10, 0
-error_str db 'Error', 0
+;error_str db 'Error', 0
-success_str db 'Success', 0
+;success_str db 'Success', 0
 disk_identifier db 0
 
+DAPACK:
+  .dap_Size:         db  0x10   ; This is always 16 bytes (0x10)
+  .rev_byte:         db  0x0    ; reserved byte, should always be zero
+  .blkcnt:           dw  0x0    ; int 13 resets this to # of blocks actually read/written
+  .db_addr_offset:   dw  0x0    ; memory buffer destination address (0:7c00)
+  .db_addr_segment:  dw  0x0    ; in memory page zero
+  .lba_addr_dw_low:  dd  0x0    ; put the lba to read in this spot
+  .lba_addr_dw_high: dd  0x0    ; more storage bytes only for big lba's ( > 4 bytes ) 
+
+
 ; Pad to 510 bytes (boot sector size minus 2) with 0s, and finish with the two-byte standard boot signature
 times 446-($-$$) db 0 ; First partion entry
 partition_1:
-.active_partition db 0x00 
+.active_partition db 0x80 
 .start_CHS db 0x00, 0x00, 0x11;0x20, 0x21, 0x00 
 .disk_type db 0x83 
 .end_CHS db 0x8C, 0x3D, 0x0F 
-.start_LBA db 0x00, 0x08, 0x00, 0x00 
+.start_LBA db 0x10, 0x00, 0x00, 0x00 
 .size db 0x00, 0xC8, 0x03, 0x00  
 
 partition_2:
-.active_partition db 0x80 
+.active_partition db 0x00 
 .start_CHS db 0x8C, 0x3E, 0x0F 
 .disk_type db 0x83 
 .end_CHS db 0xFF, 0xFF, 0xFF