; Variabels ;\r
;--------------;\r
\r
-prompt db 'BOS kernel>', 0\r
-cmd_buffer: times 255 db 0 ; 255 char command buffer\r
+ prompt db 'BOS kernel>', 0\r
+ cmd_buffer: times 255 db 0 ; 255 char command buffer\r
\r
\r
\r
; print the prompt for the first time.. :-) ;\r
;----------------------------------------------;\r
init_cmd:\r
- mov byte [kbd_status], 0 ; reset LEDs to 0..\r
- call update_leds\r
+ mov byte [kbd_status], 0 ; reset LEDs to 0..\r
+ call update_leds\r
\r
- mov esi, prompt\r
- mov bl, 0x0E\r
- call print\r
+ mov esi, prompt\r
+ mov bl, 0x0E\r
+ call print\r
\r
- mov edi, cmd_buffer\r
-\r
- ret\r
+ mov edi, cmd_buffer\r
+ ret\r
\r
\r
\r
; Main shell function & loop ;\r
;-------------------------------;\r
shell:\r
- mov cx, 0 ; max 254 chars in command\r
- .loop: ; no. 255 is always a 0\r
+ mov cx, 0 ; max 254 chars in command\r
+ .loop: ; no. 255 is always a 0\r
\r
- push cx ; better be sure it´s safe..\r
- push edi\r
+ push cx ; better be sure it´s safe..\r
+ push edi\r
\r
- call getc ; keyboard.inc\r
+ call getc ; keyboard.inc\r
\r
- pop edi\r
- pop cx\r
+ pop edi\r
+ pop cx\r
\r
- cmp ah, 28 ; enter\r
- je .enter\r
+ cmp ah, 28 ; enter\r
+ je .enter\r
\r
- cmp ah, 14 ; backspace\r
- je .backspace\r
+ cmp ah, 14 ; backspace\r
+ je .backspace\r
\r
- cmp al, 0 ; no normal key\r
- je .loop ; exceptions above..\r
+ cmp al, 0 ; no normal key\r
+ je .loop ; exceptions above..\r
\r
- cmp cx, 254\r
- jae .loop\r
+ cmp cx, 254\r
+ jae .loop\r
\r
- stosb ; store char in buffer\r
- inc cx\r
+ stosb ; store char in buffer\r
+ inc cx\r
\r
- mov bl, al ; print it..\r
- mov bh, 0x07\r
- call print_char\r
+ mov bl, al ; print it..\r
+ mov bh, 0x07\r
+ call print_char\r
\r
- jmp .loop\r
+ jmp .loop\r
\r
.enter:\r
- mov al, 0 ; the command buffer is\r
- stosb ; in ASCIIZ format..\r
- jmp chk_cmd\r
+ mov al, 0 ; the command buffer is\r
+ stosb ; in ASCIIZ format..\r
+ jmp chk_cmd\r
\r
.backspace:\r
- cmp cx, 0 ; can´t delete the prompt.. ;-)\r
- je .loop\r
- dec edi ; "remove" one char from buffer\r
- call backspace ; do backspace on screen\r
- dec cx ; decrease buffer counter\r
- jmp .loop\r
- jmp $\r
- ret\r
+ cmp cx, 0 ; can´t delete the prompt.. ;-)\r
+ je .loop\r
+ dec edi ; "remove" one char from buffer\r
+ call backspace ; do backspace on screen\r
+ dec cx ; decrease buffer counter\r
+ jmp .loop\r
+ jmp $\r
+ ret\r
\r
\r
\r
;---------------------------------;\r
chk_cmd:\r
\r
- mov esi, commands\r
- mov edi, cmd_buffer\r
- mov ebp, 0 ; command-table counter\r
-\r
- ;------------------------------------------;\r
- ; big loop, for each command in table ;\r
- ;------------------------------------------;\r
- .l1:\r
- mov ecx, 0 ; char counter\r
-\r
- cmp byte [esi], 0xFF\r
- je .no_valid_cmd\r
-\r
- ;------------------------------------------;\r
- ; smaller loop for each char in command ;\r
- ;------------------------------------------;\r
- .l2:\r
- cmp byte [edi], ' ' ; space or zero\r
- je .l_chk ; both indicate\r
- cmp byte [edi], 0 ; "end of command"\r
- je .l_chk\r
- jmp .l_cont\r
+ mov esi, commands\r
+ mov edi, cmd_buffer\r
+ mov ebp, 0 ; command-table counter\r
+\r
+ ;------------------------------------------;\r
+ ; big loop, for each command in table ;\r
+ ;------------------------------------------;\r
+ .l1:\r
+ mov ecx, 0 ; char counter\r
+\r
+ cmp byte [esi], 0xFF\r
+ je .no_valid_cmd\r
+\r
+ ;------------------------------------------;\r
+ ; smaller loop for each char in command ;\r
+ ;------------------------------------------;\r
+ .l2:\r
+ cmp byte [edi], ' ' ; space or zero\r
+ je .l_chk ; both indicate\r
+ cmp byte [edi], 0 ; "end of command"\r
+ je .l_chk\r
+ jmp .l_cont\r
\r
.l_chk:\r
- cmp byte [esi], 0 ; commands are equal, but\r
- jne .new_cmd ; do not match in size..\r
- jmp .done\r
+ cmp byte [esi], 0 ; commands are equal, but\r
+ jne .new_cmd ; do not match in size..\r
+ jmp .done\r
\r
.l_cont:\r
- cmp byte [esi], 0 ; commands are equal, but\r
- je .new_cmd ; do not match in size..\r
-\r
- mov al, [esi]\r
- cmp al, [edi]\r
- jne .new_cmd\r
-\r
- inc esi\r
- inc edi\r
- inc ecx ; inc char counter\r
- jmp .l2\r
- ;----------------------;\r
- ; end of small loop ;\r
- ;----------------------;\r
-\r
- .new_cmd:\r
- inc ebp ; inc command counter\r
- mov edi, cmd_buffer ; remember to point to the right place.. ;-)\r
- .l3:\r
- inc esi\r
- cmp byte [esi], 0 ; loop until end of command\r
- jne .l3\r
-\r
- inc esi\r
- jmp .l1\r
- ;----------------------;\r
- ; end of big loop ;\r
- ;----------------------;\r
-\r
-\r
-\r
- ;--------------------------;\r
- ; done. command found ;\r
- ;--------------------------;\r
- .done:\r
- cmp ecx, 0 ; make sure it´s more\r
- je .d_quit ; then 0 chars..\r
-\r
- shl ebp, 2\r
- call dword [ebp+call_table]\r
-\r
- .d_quit:\r
- jmp .cont ; then go back to the shell\r
-\r
-\r
- ;--------------------------;\r
- ; command not found ;\r
- ;--------------------------;\r
- .no_valid_cmd:\r
-\r
- ; call search_current_directory_for_file.... :-)\r
-\r
- call no_such_cmd ; print error..\r
- jmp .cont ; then go back to the shell\r
-\r
- ;---------------------------------;\r
- ; make the prompt appear again ;\r
- ;---------------------------------;\r
- .cont:\r
- call new_line\r
- call new_line\r
- mov esi, prompt\r
- mov bl, 0x0E\r
- call print\r
- mov edi, cmd_buffer\r
- jmp shell\r
-\r
- ret\r
+ cmp byte [esi], 0 ; commands are equal, but\r
+ je .new_cmd ; do not match in size..\r
+\r
+ mov al, [esi]\r
+ cmp al, [edi]\r
+ jne .new_cmd\r
+\r
+ inc esi\r
+ inc edi\r
+ inc ecx ; inc char counter\r
+ jmp .l2\r
+ ;----------------------;\r
+ ; end of small loop ;\r
+ ;----------------------;\r
+\r
+ .new_cmd:\r
+ inc ebp ; inc command counter\r
+ mov edi, cmd_buffer ; remember to point to the right place.. ;-)\r
+ .l3:\r
+ inc esi\r
+ cmp byte [esi], 0 ; loop until end of command\r
+ jne .l3\r
+\r
+ inc esi\r
+ jmp .l1\r
+ ;----------------------;\r
+ ; end of big loop ;\r
+ ;----------------------;\r
+\r
+\r
+\r
+ ;--------------------------;\r
+ ; done. command found ;\r
+ ;--------------------------;\r
+ .done:\r
+ cmp ecx, 0 ; make sure it´s more\r
+ je .d_quit ; then 0 chars..\r
+\r
+ shl ebp, 2\r
+ call dword [ebp+call_table]\r
+\r
+ .d_quit:\r
+ jmp .cont ; then go back to the shell\r
+\r
+\r
+ ;--------------------------;\r
+ ; command not found ;\r
+ ;--------------------------;\r
+ .no_valid_cmd:\r
+\r
+ ; call search_current_directory_for_file.... :-)\r
+\r
+ call no_such_cmd ; print error..\r
+ jmp .cont ; then go back to the shell\r
+\r
+ ;---------------------------------;\r
+ ; make the prompt appear again ;\r
+ ;---------------------------------;\r
+ .cont:\r
+ call new_line\r
+ call new_line\r
+ mov esi, prompt\r
+ mov bl, 0x0E\r
+ call print\r
+ mov edi, cmd_buffer\r
+ jmp shell\r
+\r
+ ret\r
projects / BOS.git / blobdiff