92 lines
1.6 KiB
NASM
Executable File
92 lines
1.6 KiB
NASM
Executable File
os_start_cli:
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pusha
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call os_print_newline
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mov si, prompt
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call os_print_string
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mov ax, 20
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mov di, user_input
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call os_display_input
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; ------------------------------------------------
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os_read_cli:
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pusha
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.output_the_user_input:
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call os_print_newline
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.check_matches: ; Check if the user input matches any internal commands
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; Help
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mov si, user_input
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mov di, help_string
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call os_compare_strings
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cmp cl, 1
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je help
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; Clear screen
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mov si, user_input
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mov di, clear_string
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call os_compare_strings
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cmp cl, 1
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je clear
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; Reboot
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mov si, user_input
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mov di, reboot_string
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call os_compare_strings
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cmp cl, 1
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je power_reboot
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; Pong
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mov si, user_input
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mov di, pong_string
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call os_compare_strings
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cmp cl, 1
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je pong
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jmp .unkown
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.unkown:
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mov si, unknown_command
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call os_print_string
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mov si, user_input
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call os_print_string
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jmp .finish
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.finish:
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popa
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call os_start_cli
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clear:
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call os_set_text_mode
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call os_read_cli.finish
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help:
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mov si, help_text
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call os_print_string
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call os_read_cli.finish
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pong:
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call game_pong
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call os_read_cli.finish
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section .data
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welcome_text db 'Welcome to CrawOS, the Cwick, Real and AWsome Operating System\n', 0
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user_input times 20 db 0
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prompt_length db 20
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prompt db 'CrawOS sh> ', 0
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help_string db 'HELP', 0
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clear_string db 'CLEAR', 0
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reboot_string db 'REBOOT', 0
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cat_string db 'CAT', 0
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pong_string db 'PONG', 0
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help_text db 'This is for Cowards:\n"HELP" for this helpful text,\n"CLEAR" to clear the screen,\n"REBOOT" or esc to reboot\n', 0
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command_result_text db 'You typed: ', 0
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unknown_command db 'Error: Unkown Command.. \n', 0
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