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Rev Author Line No. Line
8725 rgimad 1 
; 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:
8734 rgimad 21 
        mcall   68, 11
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        mcall   68, 12, IMGBUF_SIZE
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        mov     dword [imgbuf_ptr], eax
8725 rgimad 24 
 
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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:
8734 rgimad 52 
        mcall   23, CLOCK_RATE ; wait for event with CLOCK_RATE timeout
8725 rgimad 53 
        ;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: