3b1emu / file diff

diff: src/main.c

src/main.c

changeset 111
4c85846b09cd
parent 107
566cfc70ef33
child 112
a392eb8f9806
     1.1 --- a/src/main.c	Thu Dec 08 23:44:19 2011 +0000
     1.2 +++ b/src/main.c	Sat Nov 17 19:13:08 2012 +0000
     1.3 @@ -19,6 +19,26 @@
     1.4  	exit(EXIT_FAILURE);
     1.5  }
     1.6  
     1.7 +static int load_fd()
     1.8 +{
     1.9 +
    1.10 +	int writeable = 1;
    1.11 +	state.fdc_disc = fopen("discim", "r+b");
    1.12 +	if (!state.fdc_disc){
    1.13 +		writeable = 0;
    1.14 +		state.fdc_disc = fopen("discim", "rb");
    1.15 +	}
    1.16 +	if (!state.fdc_disc){
    1.17 +		fprintf(stderr, "ERROR loading disc image 'discim'.\n");
    1.18 +		state.fdc_disc = NULL;
    1.19 +		return (0);
    1.20 +	}else{
    1.21 +		wd2797_load(&state.fdc_ctx, state.fdc_disc, 512, 10, 2, writeable);
    1.22 +		fprintf(stderr, "Disc image loaded.\n");
    1.23 +		return (1);
    1.24 +	}
    1.25 +}
    1.26 +
    1.27  /**
    1.28   * @brief Set the pixel at (x, y) to the given value
    1.29   * @note The surface must be locked before calling this!
    1.30 @@ -140,14 +160,7 @@
    1.31  							state.fdc_disc = NULL;
    1.32  							fprintf(stderr, "Disc image unloaded.\n");
    1.33  						} else {
    1.34 -							state.fdc_disc = fopen("discim", "rb");
    1.35 -							if (!state.fdc_disc) {
    1.36 -								fprintf(stderr, "ERROR loading disc image 'discim'.\n");
    1.37 -								state.fdc_disc = NULL;
    1.38 -							} else {
    1.39 -								wd2797_load(&state.fdc_ctx, state.fdc_disc, 512, 10, 2);
    1.40 -								fprintf(stderr, "Disc image loaded.\n");
    1.41 -							}
    1.42 +							load_fd();
    1.43  						}
    1.44  						break;
    1.45  					case SDLK_F12:
    1.46 @@ -214,12 +227,7 @@
    1.47  	SDL_WM_SetCaption("FreeBee 3B1 emulator", "FreeBee");
    1.48  
    1.49  	// Load a disc image
    1.50 -	state.fdc_disc = fopen("discim", "rb");
    1.51 -	if (!state.fdc_disc) {
    1.52 -		fprintf(stderr, "ERROR loading disc image 'discim'.\n");
    1.53 -		return -4;
    1.54 -	}
    1.55 -	wd2797_load(&state.fdc_ctx, state.fdc_disc, 512, 10, 2);
    1.56 +	load_fd();
    1.57  
    1.58  	/***
    1.59  	 * The 3B1 CPU runs at 10MHz, with DMA running at 1MHz and video refreshing at
    1.60 @@ -345,8 +353,11 @@
    1.61  //				state.dma_count = 0;
    1.62  				state.dmaen = false;
    1.63  			}
    1.64 +		}else if (wd2797_get_drq(&state.fdc_ctx)){
    1.65 +			wd2797_dma_miss(&state.fdc_ctx);
    1.66  		}
    1.67  
    1.68 +
    1.69  		// Any interrupts? --> TODO: masking
    1.70  /*		if (!lastirq_fdc) {
    1.71  			if (wd2797_get_irq(&state.fdc_ctx)) {
    1.72 @@ -354,12 +365,13 @@
    1.73  				m68k_set_irq(2);
    1.74  			}
    1.75  */
    1.76 -		if (keyboard_get_irq(&state.kbd)) {
    1.77 +		if (wd2797_get_irq(&state.fdc_ctx)){
    1.78 +			m68k_set_irq(2);
    1.79 +		}else if (keyboard_get_irq(&state.kbd)) {
    1.80  			m68k_set_irq(3);
    1.81  		} else {
    1.82 -			lastirq_fdc = wd2797_get_irq(&state.fdc_ctx);
    1.83  //			if (!state.timer_asserted){
    1.84 -//				m68k_set_irq(0);
    1.85 +				m68k_set_irq(0);
    1.86  //			}
    1.87  		}
    1.88