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comparison vdp.c @ 1428:2540c05520f2

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New savestates are working. New config file option for selecting format states will be saved in. Mostly complete, needs a little more work before release
author Michael Pavone <pavone@retrodev.com>
date Wed, 09 Aug 2017 23:26:51 -0700
parents 4e5797b3935a
children 030b40139de9
comparison
equal deleted inserted replaced
1427:4e5797b3935a 1428:2540c05520f2
772 #define VSRAM_DIRTY_BITS 0xF800 772 #define VSRAM_DIRTY_BITS 0xF800
773 773
774 //rough estimate of slot number at which border display starts 774 //rough estimate of slot number at which border display starts
775 #define BG_START_SLOT 6 775 #define BG_START_SLOT 6
776 776
777 void write_cram(vdp_context * context, uint16_t address, uint16_t value) 777 void write_cram_internal(vdp_context * context, uint16_t addr, uint16_t value)
778 { 778 {
779 uint16_t addr;
780 if (context->regs[REG_MODE_2] & BIT_MODE_5) {
781 addr = (address/2) & (CRAM_SIZE-1);
782 } else {
783 addr = address & 0x1F;
784 value = (value << 1 & 0xE) | (value << 2 & 0xE0) | (value & 0xE00);
785 }
786 context->cram[addr] = value; 779 context->cram[addr] = value;
787 context->colors[addr] = color_map[value & CRAM_BITS]; 780 context->colors[addr] = color_map[value & CRAM_BITS];
788 context->colors[addr + CRAM_SIZE] = color_map[(value & CRAM_BITS) | FBUF_SHADOW]; 781 context->colors[addr + CRAM_SIZE] = color_map[(value & CRAM_BITS) | FBUF_SHADOW];
789 context->colors[addr + CRAM_SIZE*2] = color_map[(value & CRAM_BITS) | FBUF_HILIGHT]; 782 context->colors[addr + CRAM_SIZE*2] = color_map[(value & CRAM_BITS) | FBUF_HILIGHT];
790 context->colors[addr + CRAM_SIZE*3] = color_map[(value & CRAM_BITS) | FBUF_MODE4]; 783 context->colors[addr + CRAM_SIZE*3] = color_map[(value & CRAM_BITS) | FBUF_MODE4];
784 }
785
786 static void write_cram(vdp_context * context, uint16_t address, uint16_t value)
787 {
788 uint16_t addr;
789 if (context->regs[REG_MODE_2] & BIT_MODE_5) {
790 addr = (address/2) & (CRAM_SIZE-1);
791 } else {
792 addr = address & 0x1F;
793 value = (value << 1 & 0xE) | (value << 2 & 0xE0) | (value & 0xE00);
794 }
795 write_cram_internal(context, addr, value);
791 796
792 if (context->hslot >= BG_START_SLOT && ( 797 if (context->hslot >= BG_START_SLOT && (
793 context->vcounter < context->inactive_start + context->border_bot 798 context->vcounter < context->inactive_start + context->border_bot
794 || context->vcounter > 0x200 - context->border_top 799 || context->vcounter > 0x200 - context->border_top
795 )) { 800 )) {