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Rev 8725 | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
8725 rgimad 1 
;=========================================
2 
; initialized data
3 
        include_debug_strings ; for debug-fdo
4 
 
5 
        chip8_fontset db  \
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            0xF0, 0x90, 0x90, 0x90, 0xF0, \  ; 0
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            0x20, 0x60, 0x20, 0x20, 0x70, \  ; 1
8 
            0xF0, 0x10, 0xF0, 0x80, 0xF0, \  ; 2
9 
            0xF0, 0x10, 0xF0, 0x10, 0xF0, \  ; 3
10 
            0x90, 0x90, 0xF0, 0x10, 0x10, \  ; 4
11 
            0xF0, 0x80, 0xF0, 0x10, 0xF0, \  ; 5
12 
            0xF0, 0x80, 0xF0, 0x90, 0xF0, \  ; 6
13 
            0xF0, 0x10, 0x20, 0x40, 0x40, \  ; 7
14 
            0xF0, 0x90, 0xF0, 0x90, 0xF0, \  ; 8
15 
            0xF0, 0x90, 0xF0, 0x10, 0xF0, \  ; 9
16 
            0xF0, 0x90, 0xF0, 0x90, 0x90, \  ; A
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            0xE0, 0x90, 0xE0, 0x90, 0xE0, \  ; B
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            0xF0, 0x80, 0x80, 0x80, 0xF0, \  ; C
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            0xE0, 0x90, 0x90, 0x90, 0xE0, \  ; D
20 
            0xF0, 0x80, 0xF0, 0x80, 0xF0, \  ; E
21 
            0xF0, 0x80, 0xF0, 0x80, 0x80     ; F
22 
 
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        opcode  dw 0          ; operation code
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        V       db 16 dup(0)  ; 16 8-bit registers
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        I       dw 0          ; additional register (usually used for storing addresses)
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        P_C     dw 0          ; program counter
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        S_P     dw 0          ; stack pointer
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        delay_timer db 0
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        sound_timer db 0
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        stackmem    dw STACK_SIZE dup(0)  ; stack memory
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        key         db KEY_SIZE dup (0) ; keyboard
32 
        chip8_draw_flag db 0
33 
        next_rand       dd 1
34 
 
35 
        align 4
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        fread_struct:
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            .subfunction    dd 0               ; + 0
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            .offset_low     dd 0               ; + 4
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            .offset_high    dd 0               ; + 8
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            .size           dd MAX_GAME_SIZE   ; + 12
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            .buffer         dd memory + 0x200  ; + 16
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                            db 0               ; + 20
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            .filename:      dd 0               ; + 24
44 
 
45 
        sys_colors system_colors
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        main_window_title db 'CHIP-8 Emulator',0
47 
 
8734 rgimad 48 
        imgbuf_ptr  dd ? ; pointer to in-memory image buffer
49 
 
8725 rgimad 50 
;=========================================
51 
align 16
52 
_i_end:
53 
; uninitialized data
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        cmdline rb 1024 ; reserve for command line arguments
55 
 
56 
        memory  rb MEM_SIZE
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        gfx     rb GFX_SIZE
58 
 
59 
        ;tmp_buf rb 128