Add an out-of-memory error dialog to shell
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parent
144a8c0bb1
commit
faf66bbdb8
146
shell.asm
146
shell.asm
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@ -8,6 +8,8 @@ struc window
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.y resw 1
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.data resw 1
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.icon resb 1
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.visible resb 1
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.resizable resb 1
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.mouse_released_inside resb 1
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.status resb 1
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.res_x resw 1
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@ -17,6 +19,7 @@ endstruc
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WINDOW_ID_ICON equ 0
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WINDOW_ID_FILE_WINDOW equ 1
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WINDOW_ID_OOM_ERROR equ 2
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WINDOW_MOVE equ 1
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WINDOW_RESIZE equ 2
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@ -58,16 +61,16 @@ initialize:
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call set_wallpaper
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; Create icon for the disk on the desktop
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mov ax, cs
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add ax, WINDOW_ID_ICON
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xchg [es:GLOBAL_WINDOW_CHAIN_HEAD], ax
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mov [windows + WINDOW_ID_ICON*window.size + window.next], ax
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mov word [windows + WINDOW_ID_ICON*window.size + window.width], 5
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mov word [windows + WINDOW_ID_ICON*window.size + window.height], 3
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mov word [windows + WINDOW_ID_ICON*window.size + window.x], 1
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mov word [windows + WINDOW_ID_ICON*window.size + window.y], 1
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mov word [windows + WINDOW_ID_ICON*window.size + window.data], disk_icon
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mov byte [windows + WINDOW_ID_ICON*window.size + window.icon], 1
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mov ax, cs
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add ax, WINDOW_ID_ICON
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mov si, windows + WINDOW_ID_ICON*window.size
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call show_window
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; Initialize file window but don't show it
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mov word [windows + WINDOW_ID_FILE_WINDOW*window.size + window.width], 40
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@ -75,8 +78,14 @@ initialize:
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mov word [windows + WINDOW_ID_FILE_WINDOW*window.size + window.x], 10
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mov word [windows + WINDOW_ID_FILE_WINDOW*window.size + window.y], 4
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mov word [windows + WINDOW_ID_FILE_WINDOW*window.size + window.data], file_window
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mov byte [windows + WINDOW_ID_FILE_WINDOW*window.size + window.icon], 0
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mov byte [windows + WINDOW_ID_FILE_WINDOW*window.size + window.mouse_released_inside], 0
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mov byte [windows + WINDOW_ID_FILE_WINDOW*window.size + window.resizable], 1
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; Initialize error dialogs
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mov word [windows + WINDOW_ID_OOM_ERROR*window.size + window.width], 13
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mov word [windows + WINDOW_ID_OOM_ERROR*window.size + window.height], 2
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mov word [windows + WINDOW_ID_OOM_ERROR*window.size + window.x], 30
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mov word [windows + WINDOW_ID_OOM_ERROR*window.size + window.y], 10
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mov word [windows + WINDOW_ID_OOM_ERROR*window.size + window.data], oom_error_dialog
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call request_redraw
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@ -300,19 +309,30 @@ click:
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cmp byte [si + window.icon], 0
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je .file_window
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.icon:
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call show_file_window
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mov ax, cs
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add ax, WINDOW_ID_FILE_WINDOW
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mov si, windows + WINDOW_ID_FILE_WINDOW*window.size
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call show_window
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call render_file_window
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jmp .end
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.file_window:
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call raise_window
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; Save window ID
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mov bp, ax
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cmp bx, [si + window.y]
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jne .not_title_bar
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; If clicked the window close button
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; Resize button
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mov ax, [si + window.x]
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cmp byte [si + window.resizable], 0
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je .not_resizable
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cmp ax, cx
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je .resize
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.not_resizable:
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; Window close button
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add ax, [si + window.width]
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dec ax
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cmp ax, cx
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@ -332,7 +352,7 @@ click:
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jmp .end
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.close:
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call hide_file_window
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call hide_window
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jmp .end
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@ -495,43 +515,6 @@ move:
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pop dx
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ret
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show_file_window:
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cmp byte [file_window_visible], 0
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jne .already_visible
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push ax
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mov ax, PONYDOS_SEG
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mov es, ax
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mov ax, cs
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add ax, WINDOW_ID_FILE_WINDOW
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xchg [es:GLOBAL_WINDOW_CHAIN_HEAD], ax
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mov si, windows + WINDOW_ID_FILE_WINDOW*window.size
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mov [si + window.next], ax
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; Populate file window contents
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call render_file_window
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pop ax
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mov byte [file_window_visible], 1
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call request_redraw
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.already_visible:
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ret
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hide_file_window:
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mov cx, cs
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add cx, WINDOW_ID_FILE_WINDOW
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call unhook_window
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mov byte [file_window_visible], 0
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call request_redraw
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ret
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; out:
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; clobbers everything
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launch:
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@ -591,7 +574,11 @@ launch:
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jz .found_free_segment
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inc si
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loop .find_free_segment
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; TODO: Display an alert on OOM error
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; Display an error dialog if we can't allocate a segment
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mov ax, cs
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add ax, WINDOW_ID_OOM_ERROR
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mov si, windows + WINDOW_ID_OOM_ERROR*window.size
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call show_window
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pop cx
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pop ax
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jmp .end
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@ -673,7 +660,7 @@ forward_event:
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; in:
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; bx = valid window id for this process
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; out:
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; si = pointer to window's data block
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; si = pointer to window structure
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get_window:
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push bx
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@ -693,6 +680,62 @@ get_window:
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pop bx
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ret
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; in:
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; ax = window ID
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; si = pointer to window structure
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show_window:
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push ax
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cmp byte [si + window.visible], 0
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je .not_yet_visible
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call raise_window
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jmp .end
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.not_yet_visible:
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call hook_window
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mov [si + window.next], ax
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mov byte [si + window.visible], 1
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call request_redraw
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.end:
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pop ax
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ret
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; in:
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; bp = window ID
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; si = pointer to window structure
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hide_window:
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push cx
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mov cx, bp
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call unhook_window
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mov byte [windows + WINDOW_ID_FILE_WINDOW*window.size + window.visible], 0
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call request_redraw
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pop cx
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ret
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; in:
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; ax = window ID to hook
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; out:
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; ax = next window ID
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hook_window:
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push bp
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push es
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mov bp, PONYDOS_SEG
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mov es, bp
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xchg [es:GLOBAL_WINDOW_CHAIN_HEAD], ax
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pop es
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pop bp
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ret
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; in:
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; cx = window ID to unhook
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unhook_window:
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@ -1025,9 +1068,16 @@ disk_icon:
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db 0x00, 0x0f, 0x00, 0x0f, 0x09, 0x0f, 0x00, 0x0f, 0x00, 0x0f
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db 0x00, 0x0f, 0x00, 0x0f, '|', 0x0f, 0x00, 0x0f, 0x00, 0x0f
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oom_error_dialog:
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db 'E', 0x0f, 'r', 0x0f, 'r', 0x0f, 'o', 0x0f, 'r', 0x0f
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times 13-5-1 db 0x00, 0x0f
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db 'x', 0x0f
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db 'O', 0xf0, 'u', 0xf0, 't', 0xf0, ' ', 0xf0, 'o', 0xf0, 'f', 0xf0, ' ', 0xf0, 'm', 0xf0, 'e', 0xf0, 'm', 0xf0, 'o', 0xf0, 'r', 0xf0, 'y', 0xf0
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windows:
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times window.size db 0
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times window.size db 0
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times window.size db 0
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launch_filename times FS_DIRENT_NAME_SIZE db 0
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