287 lines
7.3 KiB
NASM
287 lines
7.3 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: 0xFF674764
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const TEXT_COLOR: 0xFFFFFFFF
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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 audio playback
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mov r0, 0x80000600
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out r0, 0
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; clear the interrupt vector for interrupt 0xFE - audio buffer switch
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mov [0x000003F8], 0x00000000
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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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call enable_cursor
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mov r0, BACKGROUND_COLOR
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call fill_background
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call enable_menu_bar
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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, startup_str
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mov r1, 16
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mov r2, 464
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mov r3, TEXT_COLOR
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mov r4, 0x00000000
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mov r10, FOX32ROM_VERSION_MAJOR
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mov r11, FOX32ROM_VERSION_MINOR
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mov r12, FOX32ROM_VERSION_PATCH
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call draw_format_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, EVENT_TYPE_MOUSE_CLICK
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;ifz call mouse_click_event
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; was the mouse released?
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cmp r0, EVENT_TYPE_MOUSE_RELEASE
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;ifz call mouse_release_event
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; did the user click the menu bar?
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cmp r0, EVENT_TYPE_MENU_BAR_CLICK
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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, EVENT_TYPE_MENU_UPDATE
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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, EVENT_TYPE_MENU_CLICK
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ifz call menu_click_event
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; check if a disk is inserted as disk 0
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; if port 0x8000100n returns a non-zero value, then a disk is inserted 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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; insert disk
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cmp r3, 0
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ifz jmp insert_boot_disk
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; shutdown
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cmp r3, 1
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ifz icl
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ifz halt
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ret
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insert_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 "audio.asm"
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#include "background.asm"
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#include "boot.asm"
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#include "cursor.asm"
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#include "debug.asm"
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#include "disk.asm"
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#include "draw_pixel.asm"
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#include "draw_rectangle.asm"
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#include "draw_text.asm"
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#include "draw_tile.asm"
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#include "event.asm"
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#include "integer.asm"
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#include "keyboard.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 "monitor/monitor.asm"
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#include "mouse.asm"
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#include "overlay.asm"
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#include "panic.asm"
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#include "ryfs.asm"
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#include "string.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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data.32 panic
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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_format_str_generic
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data.32 draw_decimal_generic
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data.32 draw_hex_generic
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data.32 draw_font_tile_generic
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data.32 draw_tile_generic
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data.32 set_tilemap
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data.32 draw_pixel_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_format_str_to_background
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data.32 draw_decimal_to_background
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data.32 draw_hex_to_background
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data.32 draw_font_tile_to_background
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data.32 draw_tile_to_background
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data.32 draw_pixel_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_format_str_to_overlay
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data.32 draw_decimal_to_overlay
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data.32 draw_hex_to_overlay
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data.32 draw_font_tile_to_overlay
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data.32 draw_tile_to_overlay
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data.32 draw_pixel_to_overlay
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data.32 draw_filled_rectangle_to_overlay
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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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data.32 enable_overlay
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data.32 disable_overlay
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data.32 move_overlay
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data.32 resize_overlay
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data.32 set_overlay_framebuffer_pointer
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; menu bar jump table
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org.pad 0xF0044000
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data.32 enable_menu_bar
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data.32 disable_menu_bar
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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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data.32 menu_update_event
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; disk jump table
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org.pad 0xF0045000
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data.32 read_sector
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data.32 write_sector
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data.32 ryfs_open
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data.32 ryfs_seek
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data.32 ryfs_read
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data.32 ryfs_read_whole_file
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data.32 ryfs_get_size
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; memory copy/compare jump table
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org.pad 0xF0046000
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data.32 copy_memory_bytes
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data.32 copy_memory_words
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data.32 copy_string
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data.32 compare_memory_bytes
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data.32 compare_memory_words
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data.32 compare_string
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data.32 string_length
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; integer jump table
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org.pad 0xF0047000
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data.32 string_to_int
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; audio jump table
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org.pad 0xF0048000
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data.32 play_audio
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data.32 stop_audio
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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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const CURSOR_WIDTH: 8
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const CURSOR_HEIGHT: 12
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const CURSOR_FRAMEBUFFER_PTR: 0x0214C000
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; menu bar overlay struct:
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const MENU_BAR_WIDTH: 640
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const MENU_BAR_HEIGHT: 16
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const MENU_BAR_POSITION_X: 0
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const MENU_BAR_POSITION_Y: 0
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const MENU_BAR_FRAMEBUFFER_PTR: 0x0214C180
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; menu overlay struct:
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; this struct must be writable, so these are hard-coded addresses in ram
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const MENU_WIDTH: 0x02137180 ; 2 bytes
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const MENU_HEIGHT: 0x02137182 ; 2 bytes
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const MENU_POSITION_X: 0x02137184 ; 2 bytes
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const MENU_POSITION_Y: 0x02137186 ; 2 bytes
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const MENU_FRAMEBUFFER_PTR: 0x0213718A ; 4 bytes
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const MENU_FRAMEBUFFER: 0x0213718E
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startup_str: data.str "fox32 - ROM version %u.%u.%u - insert boot disk - F12 for monitor" data.8 0
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boot_str: data.str "fox32 - ROM version %u.%u.%u - booting..." data.8 0
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boot_error_str: data.str "fox32 - ROM version %u.%u.%u - system.bin not found! - F12 for monitor" 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 2 ; number of items
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data.8 13 ; menu width (usually longest item + 2)
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data.8 11 data.str "Insert Disk" data.8 0x00 ; text length, text, null-terminator
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data.8 9 data.str "Shut Down" 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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