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Jørn Guldberg committed 2019-09-06 21:57:00 +02:00
commit 62e1d36c38
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%macro print_format 1
lea si, [%1]
call _print_format
%endmacro
%macro print_format 2
lea si, [%1]
push %2
call _print_format
add sp, 2
%endmacro
%macro print_format 3
lea si, [%1]
push %3
push %2
call _print_format
add sp, 4
%endmacro
%macro print_format 4
lea si, [%1]
push %4
push %3
push %2
call _print_format
add sp, 6
%endmacro
%macro print_format 5
lea si, [%1]
push %5
push %4
push %3
push %2
call _print_format
add sp, 8
%endmacro
%macro print_format 6
lea si, [%1]
push %6
push %5
push %4
push %3
push %2
call _print_format
add sp, 10
%endmacro
%macro print_format 7
lea si, [%1]
push %7
push %6
push %5
push %4
push %3
push %2
call _print_format
add sp, 12
%endmacro
BITS 16
dumpmem_hardcoded_args:
mov si, sp
mov si, [si]
mov cx, 400
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
dumpmem:
; Dumps memory
; IN 'si': Start address to dump from
; IN 'cx': Number of bytes do dump
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
pusha
xor edx, edx
.loop:
mov ax, word [esi + 2*edx]
inc edx
call dumpax
mov ax, (0xE<<8)|' ' ; print space
int 0x10
loop .loop
.end:
popa
ret
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
dumpax:
; Prints the contens of ax as a hexadecimal number
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
pusha ; save registers
mov dx, ax
mov ah, 0xE ; Teletype output
mov cx, 4 ; 4 nibbles in a 16 bit word
.print_loop:
rol dx, 4 ; rotate to next nibble
mov al, dl ; we copy to al because we need to mask only the low 4 bits
and al, 0xF ; Do the masking
add al, '0' ; convert to ASCII
; If we are greater than 9 ascii...
cmp al, '9'
jbe .skip_diff_to_ascii_A
add al, 'A'-('9'+1) ; ...add 7 to make digits 10 to 15 be represented as 'A' to 'F'
.skip_diff_to_ascii_A:
int 0x10 ; BIOS call 'output'
loop .print_loop
popa ; restore registers
ret
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
dumpax10:
; Prints the contens of ax as a decimal number
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
pusha
mov bx, 10 ; Divisor
xor cx, cx ; Digit count starts at 0
.loop_divide: ; finds digits and pushes them to stack
test ax, ax
jz .break_loop_divide
xor dx, dx
div bx ; dx = (dx:ax)%bx, ax = (dx:ax)/bx
push dx
inc cx ; Increase digit count
jmp .loop_divide
.break_loop_divide:
.loop_print:
pop ax
add al, '0' ; Convert to ascii
mov ah, 0xE
int 0x10
loop .loop_print
popa
ret
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
dumpax_char:
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
mov ah, 0xE
int 0x10
ret
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
keyprint:
; Enters a loop where the keycode of each pressed key is printed
; [ESC] exits the loop
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
pusha
mov si, .f_info
call print
.keyprint_loop:
mov ax, 0x1000 ; BIOS call to wait for key
int 0x16
mov bx, ax ; Save KeyCode in bx
print_format .f, ax, ax
cmp bx, 0x011B ; ESC key
je .break_keyprint_loop
jmp .keyprint_loop
.break_keyprint_loop:
popa
ret
.f_info: db 13, 10, "Press keys to see their keycodes.",13,10,"Press [ESC] to exit.", 13, 10, 0
.f: db "(%c: %x)", 13, 10, 0
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
dump_stack_registers:
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
push si
print_format .format_string, sp, bp
pop si
ret
.format_string: db "StackRegisters(SP:%x BP:%x)", 0
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
dump_general_registers:
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
push si
print_format .format_string, ax, cx, dx, bx, si, di
pop si
ret
.format_string: db "GeneralRegisters(ax:%x cx:%x dx:%x bx:%x si:%x di:%x)", 0
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
dump_segment_registers:
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
push si
print_format .format_string, ss, cs, ds, es, fs, gs
pop si
ret
.format_string: db "SegmentRegisters(Stack:%x Code:%x Data:%x Extra:%x F:%x G:%x)", 0
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
_print_format:
; IN: variable number of 16-bit numbers on stack
; IN: 'si' points to beginning of format string with the following format:
; %x in string replaced with hexadecimal representation
; %d in string replaced with decimal representation
; %% in string replaced with literal % sign
;
; EXAMPLE call:
; push word 1337
; push word 0xbeef
; push word 0xdead
; lea si, [.FORMAT]
; call print_format ; output: "(DEAD-BEEF){1337} 100%"
; add sp, 6
; (...)
; .FORMAT: db "(%x-%x){%d} 100%%",0
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
push bp
mov bp, sp
pushf
pusha
lea bp, [bp+4]
.outer_loop:
mov ah, 0xE ; Specify 'int 0x10' 'teletype output' function
.print_loop:
lodsb ; al = *si++
cmp al, '%'
je .break_print
test al, al
jz .break_outer
int 0x10
jmp .print_loop
.break_print:
lodsb
cmp al, 'x'
je .format_hex
cmp al, 'd'
je .format_dec
cmp al, 'c'
je .format_char
cmp al, '%'
je .print_literal_percent
.format_hex:
lea cx, [dumpax]
jmp .print_ax
.format_dec:
lea cx, [dumpax10]
jmp .print_ax
.format_char:
lea cx, [dumpax_char]
.print_ax:
mov ax, [bp]
lea bp, [bp+2]
call cx
jmp .outer_loop
.print_literal_percent:
mov ax, (0xE<<8)|'%'
int 0x10
jmp .outer_loop
.break_outer:
popa
popf
pop bp
ret
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
dump_dx_as_two_chars:
; IN dh: first char
; IN dl: second char
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
push ax
mov ah, 0xE
mov al, dh
int 0x10
mov al, dl
int 0x10
pop ax
ret
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
dump_status_flags:
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
pushf
push si
push ax
push bx
lahf
mov bl, ah
lea si, [.flags_string]
mov ah, 0xE ; Specify 'int 0x10' 'teletype output' function
.outer_loop:
; [AL = Character, BH = Page Number, BL = Colour (in graphics mode)]
.print_loop:
lodsb ; Load byte at address SI into AL, and increment SI
cmp al, '%'
je .break_print_loop ; If the character is zero (NUL), stop writing the string
test al, al
jz .break_outer_loop
int 0x10 ; Otherwise, print the character via 'int 0x10'
jmp .print_loop ; Repeat for the next character
.break_print_loop:
ror bl, 1
mov al, bl
and al, 1
add al, '0'
int 0x10
jmp .outer_loop
.break_outer_loop:
pop bx
pop ax
pop si
popf
ret
.flags_string: db "Flags(Sign:% Zero:% ?:% Adjust:% ?:% Parity:% ?:% Carry:%)", 0
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BITS 16
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
print:
; Prints string in si
; IN si: zero terminated string to print
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
mov ah, 0xE ; Specify 'int 0x10' 'teletype output' function
; [AL = Character, BH = Page Number, BL = Colour (in graphics mode)]
.printchar:
lodsb ; Load byte at address SI into AL, and increment SI
test al, al
jz .done ; If the character is zero (NUL), stop writing the string
int 0x10 ; Otherwise, print the character via 'int 0x10'
jmp .printchar ; Repeat for the next character
.done:
ret
printCRLF:
mov ah, 0xE
mov al, 13
int 0x10
mov al, 10
int 0x10
ret
printSpace:
mov ax, 0xE20
int 0x10
ret
printALChar:
mov ah, 0xE
mov bl, 0x02 ;color
int 0x10
ret
; Changing the screen the user i looking at.
; value in 'al' is the screen we want to switch to.
; starting from 0x00
os_change_screen:
; Here the addresses for the screens stack
; and base pointer has to be set.
mov ah, 0x05
int 0x10
ret
os_clear_screen:
pusha
; move cursor to the bootom
xor ax, ax
xor bx, bx
mov ah, 0x02
mov bh, 0x00 ; page number 0
mov dh, 0x18 ; row zero
mov dl, 0x00 ; coloumn zero
int 0x10
xor cx, cx
.loop:
call printCRLF
add cx, 1
cmp cx, 0x19 ; until blank screen
jne .loop
; Move curser back to the top of the screen
mov ah, 0x02
mov bh, 0x00 ; page number 0
mov dh, 0x00 ; row zero
mov dl, 0x00 ; coloumn zero
int 0x10
popa
ret
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BITS 16
; THIS LIBARY IS IN REALLY BAD SHAPE
; Power_off is okay to use
power_check:
;perform an installation check
mov ah,53h ;this is an APM command
mov al,00h ;installation check command
xor bx,bx ;device id (0 = APM BIOS)
int 15h ;call the BIOS function through interrupt 15h
call printCRLF
call dumpax
;jc APM_error ;if the carry flag is set there was an error
;the function was successful
;AX = APM version number
;AH = Major revision number (in BCD format)
;AL = Minor revision number (also BCD format)
;BX = ASCII characters "P" (in BH) and "M" (in BL)
;CX = APM flags (see the official documentation for more details)
ret
power_enable:
;Enable power management for all devices
mov ah,53h ;this is an APM command
mov al,08h ;Change the state of power management...
mov bx,0001h ;...on all devices to...
mov cx,0001h ;...power management on.
int 15h ;call the BIOS function through interrupt 15h
;jc APM_error ;if the carry flag is set there was an error
ret
power_off:
;actual shutdown command
mov ah, 0x53
mov al, 0x07
mov bx, 0x1
mov cx, 0x3
int 0x15
ret
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BITS 16
; Compares two strings
; IN si: the first (zero terminated) string
; IN di: the second (zero terminated) string
; OUT SF and ZF (same semantics as cmp)
stringcompare:
push bx
push si
push di
.loop:
mov bl, [si]
mov bh, [di]
cmp bl, bh
jne .end
test bl, bl ; bl and bh are the same, so bl = 0 => dl = 0
jz .end
inc si
inc di
jmp .loop
.end:
pop di
pop si
pop bx
ret
zstring_to_integer:
;IN: si Pointer to string
;OUT: ax result in binary
push bx
push si
push cx
push dx
xor ax, ax
xor bx, bx
xor cx, cx
xor dx, dx
mov bx, 10
.loop:
mov cl, [si]
cmp cl, 0
je .end
sub cl,'0'
cmp cl, 9
ja .end ; next number is not a number, or its a zero, and then we are done
; multiply by 10, and add the new number.
mul bx
add ax, cx
inc si
jmp .loop
.end:
pop dx
pop cx
pop si
pop bx
ret
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BITS 16
svim:
pusha ; save state before program
;mov si, .os_clear_screen_str
;call print
xor bx, bx
call os_clear_screen
;xor cx, cx ; Upper and left coordinate
;mov bh, 0x0a ; color for new screen 0 = black a = light green
;mov dh, 0xff ; Select all screen
;mov dl, 0xff ; Select all screen
;mov ah, 0x07 ; scrool down
;mov al, 0x00 ; scrool 0 lines (means blank screen )
;int 0x10
mov ah, 0x02
mov bh, 0x00 ; page number 0
mov dh, 0x00 ; row zero
mov dl, 0x17 ; coloumn zero
int 0x10
mov si, .welcome_svim_select_file
call print
call printCRLF
mov si, .seperate_line
call print
call vsfs_list_files_command
; move cursor to the bootom
xor ax, ax
xor bx, bx
mov ah, 0x02
mov bh, 0x00 ; page number 0
mov dh, 0x17 ; row zero
mov dl, 0x00 ; coloumn zero
int 0x10
mov si, .welcome_svim
call print
call printCRLF
mov si, .welcome_svim_enter_fileindex
call print
; Ask the user for the filename
xor bx, bx
xor cx, cx ; are going to be the counter
xor dx, dx
.enter_fileindex_loop:
push cx
.loop_no_push:
mov ax, 0x10 ; BIOS call to wait for key
int 0x16
cmp ax, 0x1c0d ; enter key
je .fileindex_done
cmp ax, 0x0e08 ; backspace
jne .no_enter_fileindex
cmp cx, 0
je .loop_no_push
pop cx
sub cx, 1
mov bx, .buffer_for_svim
add bx, cx
mov BYTE [bx], 0
; Go back one space
mov ax, 0x0e08 ; ah=0x0e means teletype output. al=0x08 means backspace character.
int 0x10
; Place a NULL
mov al, 0x0 ; NULL
int 0x10
; Go back one space again as the above print of NULL pushes the cursor forward again.
mov ax, 0x0e08
int 0x10
jmp .enter_fileindex_loop
.no_enter_fileindex:
mov bh, 0x00
mov bl, 0x02
mov ah, 0x0E
int 0x10 ; print char
pop cx
mov bx, .buffer_for_svim
add bx, cx
mov [bx], al
add cx, 1
; fileindex must only be 120 chars
cmp cx, 120
jae .fileindex_done
jmp .enter_fileindex_loop
.fileindex_done:
pop cx ; Cleanup, and now contain filename size
mov ax, cx
add ax, .buffer_for_svim
mov bx, ax
mov BYTE [bx], 0
mov si, .buffer_for_svim
call zstring_to_integer ; ax now contain the interger index for the file
mov [.fileindex_for_open_file], ax ; save the file index
call os_clear_screen
; move cursor to the bootom
xor ax, ax
xor bx, bx
mov ah, 0x02
mov bh, 0x00 ; page number 0
mov dh, 0x17 ; row zero
mov dl, 0x00 ; coloumn zero
int 0x10
mov si, .seperate_line
call print
mov si, .welcome_svim
call print
; move cursor to the top
xor ax, ax
xor bx, bx
mov ah, 0x02
mov bh, 0x00 ; page number 0
mov dh, 0x00 ; row zero
mov dl, 0x00 ; coloumn zero
int 0x10
; Load from disk and, enter it, into the buffer
mov si, .welcome_svim_select_file
call print
mov ax, [.fileindex_for_open_file]
call dumpax10
call printCRLF
mov si, .seperate_line
call print
mov ax, [.fileindex_for_open_file]
mov ch, al ; move the fileindex in the ch
mov bx, ds
mov es, bx
xor bx, bx
mov bx, .buffer_for_svim
xor ax, ax
mov ah, 0x02 ;Read sectors from drive
mov al, 0x04 ;Number of sectors to read (8 * 512 = 4096 bytes)
mov cl, 0x01 ;First sector to read (bits 0-5), upper bits of cylinder (bits 6-7)
mov dh, 0x00 ;Head number
mov dl, [global_disk_identifier] ;Drive number
int 0x13
mov bx, .buffer_for_svim
add bx, 2046
mov ax, [bx]
mov [.buffer_counter_svim], ax
; print buffer
mov si, .buffer_for_svim
mov es, si
call print
.svim_loop:
xor bx, bx
xor cx, cx
xor dx, dx
mov ax, 0x1000 ; BIOS call to wait for key
int 0x16
cmp ax, 0x1c0d ; enter key
jne .no_enter
mov bx, .buffer_for_svim
add bx, [.buffer_counter_svim]
mov BYTE [bx], 13 ; put char in the buffer
mov BYTE [bx + 1], 10 ; put char in the buffer
mov bx, [.buffer_counter_svim]
add bx, 0x02
mov [.buffer_counter_svim], bx
xor bx, bx
xor cx, cx
xor dx, dx
mov ax, 0x0e0d
int 0x10
mov ax, 0x0e0a
int 0x10
jmp .svim_loop
.no_enter:
cmp ax, 0x11b ; ESC key
je .end_svim
;cmp ax, 0x3c00 ; f2 key
;je .f_key_pushed
cmp ax, 0x0e08 ; backspace
je .backspace_pushed
mov bx, ax
mov ax, 0xe20
mov al, bl
mov bx, .buffer_for_svim
add bx, [.buffer_counter_svim]
mov [bx], al ; put char in the buffer
mov bx, [.buffer_counter_svim]
add bx, 0x01
mov [.buffer_counter_svim], bx
int 0x10 ; print char
jmp .svim_loop
.end_svim:
; save the written buffer
;AH 03h
;AL Sectors To Write Count
;CH Track
;CL Sector
;DH Head
;DL Drive
;ES:BX Buffer Address Pointer
mov ax, [.buffer_counter_svim]
mov bx, .buffer_for_svim
add bx, 2046
mov [bx], ax
mov bx, ds
mov es, bx
mov bx, .buffer_for_svim
mov ax, [.fileindex_for_open_file]
mov ch, al ; move the fileindex in the ch
mov ah, 0x03 ;Write sectors to drive
mov al, 0x04 ;Number of sectors to write (8 * 512 = 4096 bytes)
mov cl, 0x01 ;First sector to read (bits 0-5), upper bits of cylinder (bits 6-7)
mov dh, 0x00 ;Head number
mov dl, [global_disk_identifier] ;Drive number
int 0x13 ;Low level disk services
; clean up swim
;xor bx, bx
;xor cx, cx ; Upper and left coordinate
;mov bh, 0x0f ; color for new screen 0 = black f = white
;mov dh, 0xff ; Select all screen
;mov dl, 0xff ; Select all screen
;mov ah, 0x07 ; scrool down
;mov al, 0x00 ; scrool 0 lines (means blank screen )
;int 0x10
call os_clear_screen
popa
ret
.backspace_pushed:
mov bx, [.buffer_counter_svim]
cmp bx, 0
je .svim_loop
;print_format .debug_buffer_counter, bx
mov cx, bx
sub cx, 1
mov bx, .buffer_for_svim
add bx, cx
mov BYTE [bx], 0
mov [.buffer_counter_svim], cx
;print_format .debug_buffer_counter, cx
; Go back one space
mov ax, 0x0e08 ; ah=0x0e means teletype output. al=0x08 means backspace character.
int 0x10
; Place a NULL
mov al, 0x0 ; NULL
int 0x10
; Go back one space again as the above print of NULL pushes the cursor forward again.
mov ax, 0x0e08
int 0x10
jmp .svim_loop
;.f_key_pushed:
;mov al, 0x01 ;arg: index 1
;call os_change_screen
;jmp .svim_loop
;.load_buffer_svim:
.debug_buffer_counter db 'Buffer count: %d', 13, 10, 0
.welcome_svim db 'Vim like text editor for SingOS, ESC to exit', 0
.welcome_svim_select_file db 'svim - Open file: ', 0
.welcome_svim_enter_fileindex db 'Enter fileindex: ', 0
.seperate_line db '________________________________________________________________________________', 0
.fileindex_for_open_file dw 0
.buffer_for_svim times 2048 db 0 ; db 'this is the buffer', 0, times 32 db 0
.buffer_counter_svim dw 0