forked from KolibriOS/kolibrios
115 lines
2.7 KiB
NASM
115 lines
2.7 KiB
NASM
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; Author: rgimad (2021)
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; License: GNU GPL v2
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format binary as ""
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use32
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org 0
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db 'MENUET01' ; signature
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dd 1 ; header version
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dd start ; entry point
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dd _i_end ; end of image
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dd _mem ; required memory size
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dd _stacktop ; address of stack top
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dd cmdline ; buffer for command line arguments
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dd 0 ; buffer for path
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include 'constants.inc'
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; application's entry point
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align 4
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start:
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stdcall chip8_init ; initialize
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DEBUGF DBG_INFO, "app started, args = %s\n", cmdline
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DEBUGF DBG_INFO, "MAX_GAME_SIZE = %x = %u\n", MAX_GAME_SIZE, MAX_GAME_SIZE
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; xor ecx, ecx
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; @@:
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; mov al, byte [chip8_fontset + ecx]
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; DEBUGF DBG_INFO, "%x ", al
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; cmp ecx, 79
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; je @f
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; inc ecx
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; jmp @b
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; @@:
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mov dword [fread_struct.filename], cmdline
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stdcall chip8_loadgame, fread_struct
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jz .file_not_found
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DEBUGF DBG_INFO, "file was read. bytes: %x %x %x..\n", [memory + 0x200], [memory + 0x200 + 4], [memory + 0x200 + 8]
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; mov byte [gfx + 5], 1
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; mov byte [gfx + 64], 1
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; mov byte [gfx + 65], 1
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; mov byte [gfx + 64*2 + 3], 1
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.event_loop:
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mcall 23, CLOCK_RATE ; wait for event with CLOCK_RATE timeout
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;DEBUGF DBG_INFO, "evenp loop iter i\n"
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cmp eax, 1
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je .event_redraw
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cmp eax, 2
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je .event_key
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cmp eax, 3
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je .event_button
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jmp .event_default
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.event_redraw:
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stdcall draw_main_window
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jmp .event_default
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.event_key:
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mcall 2
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stdcall keyboard_update, eax
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DEBUGF DBG_INFO, "key scancode %x\n", eax:4
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jmp .event_default
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.event_button:
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mcall 17
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cmp ah, 1
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jne .event_default
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mcall -1
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.event_default:
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stdcall chip8_emulatecycle
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cmp byte [chip8_draw_flag], 0
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jz @f
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; mov byte [gfx + 64*2 + 3], 1 ; DBG
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stdcall draw_screen
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mov byte [chip8_draw_flag], 0
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@@:
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stdcall chip8_tick
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jmp .event_loop
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.file_not_found:
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DEBUGF DBG_ERR, "Unable to open game file! eax = %u\n", eax
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jmp .exit
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.exit:
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mov eax, -1
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int 0x40
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;;;;;;;;;;;;;;;;;;;;;;;
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include 'gui.inc'
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include 'emu.inc'
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include 'utils.inc'
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include 'data.inc'
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rb 4096 ; reserve for main thread stack
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align 16
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_stacktop:
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_mem:
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