diff options
Diffstat (limited to 'vdp.c')
| -rw-r--r-- | vdp.c | 9 |
1 files changed, 8 insertions, 1 deletions
@@ -892,14 +892,21 @@ void vdp_control_port_write(vdp_context * context, uint16_t value) if (context->flags & FLAG_PENDING) { context->address = (context->address & 0x3FFF) | (value << 14); context->cd = (context->cd & 0x3) | ((value >> 2) & 0x3C); + if (context->cd & 0x30) { + puts("attempt to use DMA detected!"); + } + //printf("New Address: %X, New CD: %X\n", context->address, context->cd); context->flags &= ~FLAG_PENDING; } else { if ((value & 0xC000) == 0x8000) { //Register write uint8_t reg = (value >> 8) & 0x1F; if (reg < VDP_REGS) { - //printf("register %d set to %X\n", reg, value); + //printf("register %d set to %X\n", reg, value & 0xFF); context->regs[reg] = value; + /*if (reg == REG_MODE_2) { + printf("Display is now %s\n", (context->regs[REG_MODE_2] & DISPLAY_ENABLE) ? "enabled" : "disabled"); + }*/ } } else { context->flags |= FLAG_PENDING; |