283 lines
6.9 KiB
NASM
283 lines
6.9 KiB
NASM
; entry point
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; fox32 starts here on reset
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org 0xF0000000
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const FOX32ROM_VERSION_MAJOR: 0
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const FOX32ROM_VERSION_MINOR: 1
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const FOX32ROM_VERSION_PATCH: 0
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const SYSTEM_STACK: 0x01FFF800
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const BACKGROUND_COLOR: 0xFF414C50
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; initialization code
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entry:
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mov rsp, SYSTEM_STACK
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mov [0x000003FC], system_vsync_handler
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; disable all overlays
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mov r31, 0x1F
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mov r0, 0x80000300
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disable_all_overlays_loop:
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out r0, 0
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inc r0
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loop disable_all_overlays_loop
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; write the cursor bitmap to the overlay framebuffer
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mov r0, [overlay_31_framebuffer_ptr]
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mov r1, mouse_cursor
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mov r31, 96 ; 8x12
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cursor_overlay_loop:
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mov [r0], [r1]
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add r0, 4
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add r1, 4
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loop cursor_overlay_loop
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cursor_enable:
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; set properties of overlay 31
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mov r0, 0x8000011F ; overlay 31: size
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mov.16 r1, [overlay_31_height]
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sla r1, 16
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mov.16 r1, [overlay_31_width]
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out r0, r1
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mov r0, 0x8000021F ; overlay 31: framebuffer pointer
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mov r1, [overlay_31_framebuffer_ptr]
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out r0, r1
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; enable overlay 31 (cursor)
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mov r0, 0x8000031F
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out r0, 1
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mov r0, BACKGROUND_COLOR
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call fill_background
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menu_bar_enable:
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; set properties of overlay 30
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mov r0, 0x8000001E ; overlay 30: position
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mov.16 r1, [overlay_30_position_y]
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sla r1, 16
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mov.16 r1, [overlay_30_position_x]
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out r0, r1
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mov r0, 0x8000011E ; overlay 30: size
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mov.16 r1, [overlay_30_height]
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sla r1, 16
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mov.16 r1, [overlay_30_width]
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out r0, r1
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mov r0, 0x8000021E ; overlay 30: framebuffer pointer
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mov r1, [overlay_30_framebuffer_ptr]
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out r0, r1
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; enable overlay 30 (menu bar)
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mov r0, 0x8000031E
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out r0, 1
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call clear_menu_bar
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mov r0, menu_items_root
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mov r1, 0xFFFFFFFF
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call draw_menu_bar_root_items
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draw_startup_text:
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mov r0, 252
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mov r1, 229
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mov r2, 136
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mov r3, 40
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mov r4, 0xFF505C60
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;mov r4, 0xFFFFFFFF
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call draw_filled_rectangle_to_background
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mov r0, 253
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mov r1, 230
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mov r2, 134
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mov r3, 38
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mov r4, 0xFFFFFFFF
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;mov r4, 0xFF000000
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call draw_filled_rectangle_to_background
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mov r0, 254
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mov r1, 231
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mov r2, 132
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mov r3, 36
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mov r4, 0xFF505C60
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;mov r4, 0xFFFFFFFF
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call draw_filled_rectangle_to_background
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mov r0, startup_str_1
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mov r1, 256
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mov r2, 232
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mov r3, 0xFFFFFFFF
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mov r4, 0x00000000
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call draw_str_to_background
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mov r0, startup_str_2
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mov r1, 256
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mov r2, 248
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call draw_str_to_background
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ise
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event_loop:
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call get_next_event
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; was the mouse clicked?
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cmp r0, MOUSE_CLICK_EVENT_TYPE
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;ifz call mouse_click_event
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; did the user click the menu bar?
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cmp r0, MENU_BAR_CLICK_EVENT_TYPE
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ifz mov r0, menu_items_root
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ifz call menu_bar_click_event
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; is the user in a menu?
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cmp r0, MENU_UPDATE_EVENT_TYPE
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ifz call menu_update_event
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; did the user click a menu item?
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cmp r0, MENU_CLICK_EVENT_TYPE
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ifz call menu_click_event
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; check if a disk is mounted as disk 0
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; if port 0x8000100n returns a non-zero value, then a disk is mounted as disk n
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in r0, 0x80001000
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cmp r0, 0
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ifnz call start_boot_process
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jmp event_loop
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menu_click_event:
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; r3 contains the clicked menu item
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; about
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cmp r3, 0
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;
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; mount disk
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cmp r3, 1
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ifz jmp mount_boot_disk
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; halt
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cmp r3, 2
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ifz icl
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ifz halt
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ret
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mount_boot_disk:
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mov r0, 0x80001000
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out r0, 0
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ret
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get_rom_version:
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mov r0, FOX32ROM_VERSION_MAJOR
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mov r1, FOX32ROM_VERSION_MINOR
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mov r2, FOX32ROM_VERSION_PATCH
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ret
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; code
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#include "background.asm"
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#include "boot.asm"
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#include "debug.asm"
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#include "draw_rectangle.asm"
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#include "draw_text.asm"
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#include "event.asm"
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#include "memory.asm"
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#include "menu.asm"
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#include "menu_bar.asm"
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#include "mouse.asm"
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#include "overlay.asm"
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#include "vsync.asm"
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; data
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; system jump table
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org.pad 0xF0040000
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data.32 get_rom_version
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data.32 system_vsync_handler
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data.32 get_mouse_position
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data.32 new_event
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data.32 wait_for_event
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data.32 get_next_event
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; generic drawing jump table
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org.pad 0xF0041000
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data.32 draw_str_generic
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data.32 draw_font_tile_generic
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data.32 draw_filled_rectangle_generic
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; background jump table
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org.pad 0xF0042000
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data.32 fill_background
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data.32 draw_str_to_background
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data.32 draw_font_tile_to_background
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data.32 draw_filled_rectangle_to_background
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; overlay jump table
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org.pad 0xF0043000
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data.32 fill_overlay
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data.32 draw_str_to_overlay
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data.32 draw_font_tile_to_overlay
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data.32 draw_filled_rectangle_to_overlay
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data.32 find_overlay_covering_position
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data.32 check_if_overlay_covers_position
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data.32 check_if_enabled_overlay_covers_position
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; menu bar jump table
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org.pad 0xF0044000
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data.32 menu_bar_click_event
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data.32 clear_menu_bar
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data.32 draw_menu_bar_root_items
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data.32 draw_menu_items
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data.32 close_menu
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org.pad 0xF004F000
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standard_font_width:
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data.16 8
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standard_font_height:
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data.16 16
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standard_font_data:
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#include_bin "font/unifont-thin.raw"
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mouse_cursor:
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#include_bin "font/cursor2.raw"
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; cursor overlay struct:
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overlay_31_width: data.16 8
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overlay_31_height: data.16 12
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overlay_31_position_x: data.16 0
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overlay_31_position_y: data.16 0
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overlay_31_framebuffer_ptr: data.32 0x8012D000
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; menu bar overlay struct:
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overlay_30_width: data.16 640
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overlay_30_height: data.16 16
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overlay_30_position_x: data.16 0
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overlay_30_position_y: data.16 0
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overlay_30_framebuffer_ptr: data.32 0x8012D180
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; menu overlay struct:
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; this struct must be writable, so these are hard-coded addresses in shared memory
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const OVERLAY_29_WIDTH: 0x80137180 ; 2 bytes
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const OVERLAY_29_HEIGHT: 0x80137182 ; 2 bytes
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const OVERLAY_29_POSITION_X: 0x80137184 ; 2 bytes
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const OVERLAY_29_POSITION_Y: 0x80137186 ; 2 bytes
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const OVERLAY_29_FRAMEBUFFER_PTR: 0x8013718A ; 4 bytes
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const OVERLAY_29_FRAMEBUFFER: 0x8013718E
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startup_str_1: data.str "Welcome to fox32" data.8 0
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startup_str_2: data.str "Insert boot disk" data.8 0
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menu_items_root:
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data.8 1 ; number of menus
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data.32 menu_items_system_list data.32 menu_items_system_name ; pointer to menu list, pointer to menu name
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menu_items_system_name:
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data.8 6 data.str "System" data.8 0x00 ; text length, text, null-terminator
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menu_items_system_list:
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data.8 3 ; number of items
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data.8 12 ; menu width (usually longest item + 2)
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data.8 5 data.str "About" data.8 0x00 ; text length, text, null-terminator
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data.8 10 data.str "Mount Disk" data.8 0x00 ; text length, text, null-terminator
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data.8 4 data.str "Halt" data.8 0x00 ; text length, text, null-terminator
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; pad out to 512 KiB
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org.pad 0xF0080000
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