fox32rom: Start working on a ROM monitor
This commit is contained in:
Ry
parent
06be1034f9
commit
92f23e91a6
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@ -8,6 +8,10 @@ keyboard_update:
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cmp r0, 0
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ifz jmp keyboard_update_end
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; invoke the debug monitor if F12 was pressed
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cmp r0, 0x58
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ifz call invoke_monitor
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; check if this is a make or break scancode
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bts r0, 7
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ifnz jmp keyboard_update_break_scancode
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3
main.asm
3
main.asm
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@ -150,6 +150,7 @@ get_rom_version:
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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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@ -261,7 +262,7 @@ 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" data.8 0
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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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menu_items_root:
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data.8 1 ; number of menus
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243
monitor/console.asm
Normal file
243
monitor/console.asm
Normal file
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@ -0,0 +1,243 @@
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; debug monitor console routines
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; print a string to the monitor
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; inputs:
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; r0: pointer to null-terminated string
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; r1: foreground color
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; r2: background color
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; outputs:
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print_string_to_monitor:
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push r0
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push r3
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mov r3, r0
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print_string_to_monitor_loop:
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movz.8 r0, [r3]
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call print_character_to_monitor
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inc r3
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cmp.8 [r3], 0x00
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ifnz jmp print_string_to_monitor_loop
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pop r3
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pop r0
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ret
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; print a single character to the monitor
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; inputs:
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; r0: character
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; r1: foreground color
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; r2: background color
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; outputs:
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; none
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print_character_to_monitor:
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push r0
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push r1
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push r2
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push r3
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push r4
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push r5
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mov r3, r1
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mov r4, r2
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cmp.8 r0, 0 ; null
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ifz jmp print_character_to_monitor_end
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cmp.8 r0, 13 ; carriage return
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ifz jmp print_character_to_monitor_cr
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cmp.8 r0, 10 ; line feed
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ifz jmp print_character_to_monitor_lf
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; check if we are at the end of this line
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cmp.8 [MONITOR_CONSOLE_X], MONITOR_CONSOLE_X_SIZE
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; if so, increment to the next line
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ifgteq mov.8 [MONITOR_CONSOLE_X], 0
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ifgteq inc.8 [MONITOR_CONSOLE_Y]
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; check if we need to scroll the display
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cmp.8 [MONITOR_CONSOLE_Y], MONITOR_CONSOLE_Y_SIZE
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ifgteq call scroll_monitor_console
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; calculate coords for character...
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movz.8 r1, [MONITOR_CONSOLE_X]
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movz.8 r2, [MONITOR_CONSOLE_Y]
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mul r2, MONITOR_CONSOLE_X_SIZE
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add r1, r2
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add r1, MONITOR_CONSOLE_TEXT_BUF
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; ...and print!!
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mov.8 [r1], r0
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inc.8 [MONITOR_CONSOLE_X]
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jmp print_character_to_monitor_end
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print_character_to_monitor_cr:
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; return to the beginning of the line
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mov.8 [MONITOR_CONSOLE_X], 0
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call redraw_monitor_console
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jmp print_character_to_monitor_end
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print_character_to_monitor_lf:
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; return to the beginning of the line and increment the line
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mov.8 [MONITOR_CONSOLE_X], 0
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inc.8 [MONITOR_CONSOLE_Y]
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; scroll the display if needed
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cmp.8 [MONITOR_CONSOLE_Y], MONITOR_CONSOLE_Y_SIZE
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ifgteq call scroll_monitor_console
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call redraw_monitor_console
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print_character_to_monitor_end:
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pop r5
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pop r4
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pop r3
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pop r2
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pop r1
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pop r0
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ret
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; scroll the console
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; inputs:
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; none
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; outputs:
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; none
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; FIXME: this shouldnt have hard coded values
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; also this is extremely slow and bad
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scroll_monitor_console:
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push r0
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push r1
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push r2
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push r31
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; source
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mov r0, MONITOR_CONSOLE_TEXT_BUF
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add r0, MONITOR_CONSOLE_X_SIZE
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; destination
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mov r1, MONITOR_CONSOLE_TEXT_BUF
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; size
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mov r2, MONITOR_CONSOLE_X_SIZE
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mul r2, 28
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call copy_memory_bytes
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mov.8 [MONITOR_CONSOLE_X], 0
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mov.8 [MONITOR_CONSOLE_Y], 28
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; clear the last line
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mov r0, MONITOR_CONSOLE_TEXT_BUF
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add r0, 2240 ; 80 * 28
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mov r31, MONITOR_CONSOLE_X_SIZE
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scroll_monitor_console_clear_loop:
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mov.8 [r0], 0
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inc r0
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loop scroll_monitor_console_clear_loop
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; redraw the screen
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call redraw_monitor_console
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pop r31
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pop r2
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pop r1
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pop r0
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ret
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; redraw the whole console
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; inputs:
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; none
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; outputs:
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; none
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redraw_monitor_console:
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push r0
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push r1
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push r2
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push r3
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push r4
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push r5
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push r6
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push r31
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mov r0, MONITOR_CONSOLE_TEXT_BUF
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mov r1, 0
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mov r2, 16
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mov r3, TEXT_COLOR
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mov r4, MONITOR_BACKGROUND_COLOR
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mov r5, 31
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mov r31, MONITOR_CONSOLE_Y_SIZE
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redraw_monitor_console_loop_y:
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push r31
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mov r1, 0
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mov r31, MONITOR_CONSOLE_X_SIZE
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redraw_monitor_console_loop_x:
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push r0
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movz.8 r0, [r0]
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call draw_font_tile_to_overlay
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movz.8 r0, [standard_font_width]
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add r1, r0
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pop r0
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inc r0
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loop redraw_monitor_console_loop_x
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pop r31
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movz.8 r6, [standard_font_height]
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add r2, r6
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loop redraw_monitor_console_loop_y
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pop r31
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pop r6
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pop r5
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pop r4
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pop r3
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pop r2
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pop r1
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pop r0
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ret
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; redraw only the current line
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; inputs:
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; none
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; outputs:
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; none
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redraw_monitor_console_line:
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push r0
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push r1
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push r2
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push r3
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push r4
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push r5
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push r6
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push r31
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movz.8 r0, [MONITOR_CONSOLE_Y]
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mul r0, MONITOR_CONSOLE_X_SIZE
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add r0, MONITOR_CONSOLE_TEXT_BUF
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movz.8 r1, [MONITOR_CONSOLE_Y]
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mov r2, 16
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mul r2, r1
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add r2, 16
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mov r1, 0
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mov r3, TEXT_COLOR
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mov r4, MONITOR_BACKGROUND_COLOR
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mov r5, 31
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mov r1, 0
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mov r31, MONITOR_CONSOLE_X_SIZE
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redraw_monitor_console_line_loop_x:
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push r0
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movz.8 r0, [r0]
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call draw_font_tile_to_overlay
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movz.8 r0, [standard_font_width]
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add r1, r0
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pop r0
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inc r0
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loop redraw_monitor_console_line_loop_x
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pop r31
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pop r6
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pop r5
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pop r4
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pop r3
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pop r2
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pop r1
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pop r0
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ret
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const MONITOR_CONSOLE_X: 0x03ED3FDB ; 1 byte
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const MONITOR_CONSOLE_Y: 0x03ED3FDA ; 1 byte
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const MONITOR_CONSOLE_TEXT_BUF: 0x03ED36CA ; 2320 bytes (80x29)
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const MONITOR_CONSOLE_X_SIZE: 80
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const MONITOR_CONSOLE_Y_SIZE: 29
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62
monitor/keyboard.asm
Normal file
62
monitor/keyboard.asm
Normal file
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@ -0,0 +1,62 @@
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; debug monitor keyboard routines
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; convert a make scancode to an ASCII character
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; inputs:
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; r0: make scancode
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; outputs:
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; r0: ASCII character
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scancode_to_ascii:
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add r0, scancode_table
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movz.8 r0, [r0]
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ret
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; scancode set 1:
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; https://wiki.osdev.org/PS/2_Keyboard#Scan_Code_Set_1
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const LSHIFT_PRESS: 0x2A
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const LSHIFT_RELEASE: 0xAA
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const RSHIFT_PRESS: 0x36
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const RSHIFT_RELEASE: 0xB6
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const CAPS_PRESS: 0x3A
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const CAPS_RELEASE: 0xBA
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scancode_table:
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data.8 0 data.8 27 data.str "1234567890-=" data.8 8
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data.8 9 data.str "qwertyuiop[]" data.8 10 data.8 0
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data.str "asdfghjkl;'`" data.8 0 data.8 92
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data.str "zxcvbnm,./" data.8 0 data.str "*" data.8 0 data.str " "
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data.8 0 data.8 0 data.8 0 data.8 0
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data.8 0 data.8 0 data.8 0 data.8 0
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data.8 0 data.8 0 data.8 0 data.8 0
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data.8 0 data.8 0 data.8 0 data.8 0
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data.str "-" data.8 0 data.8 0 data.8 0 data.str "+"
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data.8 0 data.8 0 data.8 0 data.8 0
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data.8 0 data.8 0 data.8 0 data.8 0
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data.8 0 data.8 0 data.8 0
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scancode_table_shift:
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data.8 0 data.8 27 data.str "!@#$%^&*()_+" data.8 8
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data.8 9 data.str "QWERTYUIOP{}" data.8 10 data.8 0
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data.str "ASDFGHJKL:" data.8 34 data.str "~" data.8 0 data.str "|"
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data.str "ZXCVBNM<>?" data.8 0 data.str "*" data.8 0 data.str " "
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data.8 0 data.8 0 data.8 0 data.8 0
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data.8 0 data.8 0 data.8 0 data.8 0
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data.8 0 data.8 0 data.8 0 data.8 0
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data.8 0 data.8 0 data.8 0 data.8 0
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data.str "-" data.8 0 data.8 0 data.8 0 data.str "+"
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data.8 0 data.8 0 data.8 0 data.8 0
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data.8 0 data.8 0 data.8 0 data.8 0
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data.8 0 data.8 0 data.8 0
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scancode_table_caps:
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data.8 0 data.8 27 data.str "1234567890-=" data.8 8
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data.8 9 data.str "QWERTYUIOP[]" data.8 10 data.8 0
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data.str "ASDFGHJKL;'`" data.8 0 data.8 92
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data.str "ZXCVBNM,./" data.8 0 data.str "*" data.8 0 data.str " "
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data.8 0 data.8 0 data.8 0 data.8 0
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data.8 0 data.8 0 data.8 0 data.8 0
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data.8 0 data.8 0 data.8 0 data.8 0
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data.8 0 data.8 0 data.8 0 data.8 0
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data.str "-" data.8 0 data.8 0 data.8 0 data.str "+"
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data.8 0 data.8 0 data.8 0 data.8 0
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data.8 0 data.8 0 data.8 0 data.8 0
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data.8 0 data.8 0 data.8 0
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const MONITOR_MODIFIER_BITMAP: 0x03ED3FDB ; 1 byte
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85
monitor/monitor.asm
Normal file
85
monitor/monitor.asm
Normal file
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@ -0,0 +1,85 @@
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; debug monitor
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invoke_monitor:
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; set the vsync handler to our own and reenable interrupts
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; TODO: save the old vsync handler for when the monitor exits!!!
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mov [0x000003FC], monitor_vsync_handler
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ise
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; set text buffer poinrer to the start of the text buffer
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mov [MONITOR_TEXT_BUF_PTR], MONITOR_TEXT_BUF_BOTTOM
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; set the X and Y coords of the console text
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mov.8 [MONITOR_CONSOLE_X], 0
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mov.8 [MONITOR_CONSOLE_Y], MONITOR_CONSOLE_Y_SIZE
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dec.8 [MONITOR_CONSOLE_Y]
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; set properties of overlay 31
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mov r0, 0x8000001F ; overlay 31: position
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mov.16 r1, MONITOR_POSITION_Y
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sla r1, 16
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mov.16 r1, MONITOR_POSITION_X
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out r0, r1
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mov r0, 0x8000011F ; overlay 31: size
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mov.16 r1, MONITOR_HEIGHT
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sla r1, 16
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mov.16 r1, MONITOR_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, MONITOR_FRAMEBUFFER_PTR
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out r0, r1
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mov r0, MONITOR_BACKGROUND_COLOR
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mov r1, 31
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call fill_overlay
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mov r0, info_str
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mov r1, 256
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mov r2, 0
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mov r3, TEXT_COLOR
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mov r4, 0x00000000
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mov r5, 31
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call draw_str_to_overlay
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mov r0, 0
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mov r1, 15
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mov r2, 640
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mov r3, 1
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mov r4, TEXT_COLOR
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mov r5, 31
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call draw_filled_rectangle_to_overlay
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monitor_event_loop:
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call get_next_event
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; was a key pressed?
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cmp r0, EVENT_TYPE_KEY_DOWN
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ifz call key_down_event
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jmp monitor_event_loop
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key_down_event:
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mov r0, r1
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call scancode_to_ascii
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mov r1, TEXT_COLOR
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mov r2, 0x00000000
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call print_character_to_monitor
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call redraw_monitor_console_line
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ret
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info_str: data.str "fox32rom monitor" data.8 0x00
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#include "monitor/console.asm"
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#include "monitor/keyboard.asm"
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#include "monitor/vsync.asm"
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const MONITOR_TEXT_BUF_BOTTOM: 0x03ED3FE0 ; 32 characters
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const MONITOR_TEXT_BUF_PTR: 0x03ED3FDC ; 4 bytes
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const MONITOR_BACKGROUND_COLOR: 0xFF282828
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const MONITOR_WIDTH: 640
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const MONITOR_HEIGHT: 480
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const MONITOR_POSITION_X: 0
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const MONITOR_POSITION_Y: 0
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const MONITOR_FRAMEBUFFER_PTR: 0x03ED4000
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23
monitor/vsync.asm
Normal file
23
monitor/vsync.asm
Normal file
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@ -0,0 +1,23 @@
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; debug monitor vsync routine
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monitor_vsync_handler:
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push r0
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push r1
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push r2
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push r3
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push r4
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push r5
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push r6
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push r7
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call keyboard_update
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pop r7
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pop r6
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pop r5
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pop r4
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pop r3
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pop r2
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pop r1
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pop r0
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reti
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