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comparison vdp.c @ 63:a6dd5b7a971b

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Add FPS counter to console output
author Mike Pavone <pavone@retrodev.com>
date Wed, 19 Dec 2012 20:53:59 -0800
parents a6a19c45d358
children aef6302770c2
comparison
equal deleted inserted replaced
62:b37cb596bc21 63:a6dd5b7a971b
890 { 890 {
891 //printf("control port write: %X\n", value); 891 //printf("control port write: %X\n", value);
892 if (context->flags & FLAG_PENDING) { 892 if (context->flags & FLAG_PENDING) {
893 context->address = (context->address & 0x3FFF) | (value << 14); 893 context->address = (context->address & 0x3FFF) | (value << 14);
894 context->cd = (context->cd & 0x3) | ((value >> 2) & 0x3C); 894 context->cd = (context->cd & 0x3) | ((value >> 2) & 0x3C);
895 if (context->cd & 0x30) {
896 puts("attempt to use DMA detected!");
897 }
898 //printf("New Address: %X, New CD: %X\n", context->address, context->cd);
895 context->flags &= ~FLAG_PENDING; 899 context->flags &= ~FLAG_PENDING;
896 } else { 900 } else {
897 if ((value & 0xC000) == 0x8000) { 901 if ((value & 0xC000) == 0x8000) {
898 //Register write 902 //Register write
899 uint8_t reg = (value >> 8) & 0x1F; 903 uint8_t reg = (value >> 8) & 0x1F;
900 if (reg < VDP_REGS) { 904 if (reg < VDP_REGS) {
901 //printf("register %d set to %X\n", reg, value); 905 //printf("register %d set to %X\n", reg, value & 0xFF);
902 context->regs[reg] = value; 906 context->regs[reg] = value;
907 /*if (reg == REG_MODE_2) {
908 printf("Display is now %s\n", (context->regs[REG_MODE_2] & DISPLAY_ENABLE) ? "enabled" : "disabled");
909 }*/
903 } 910 }
904 } else { 911 } else {
905 context->flags |= FLAG_PENDING; 912 context->flags |= FLAG_PENDING;
906 context->address = (context->address &0xC000) | (value & 0x3FFF); 913 context->address = (context->address &0xC000) | (value & 0x3FFF);
907 context->cd = (context->cd &0x3C) | (value >> 14); 914 context->cd = (context->cd &0x3C) | (value >> 14);