86 lines
2.1 KiB
NASM
86 lines
2.1 KiB
NASM
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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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