s_ioport_ctrl = cpu_register_io_memory(vga_mm_read_ctrl, vga_mm_write_ctrl, s);
vga_io_memory = cpu_register_io_memory(vga_mem_read, vga_mem_write, s);
- vmstate_register(0, &vmstate_vga_common, s);
+ vmstate_register(NULL, 0, &vmstate_vga_common, s);
cpu_register_physical_memory(ctrl_base, 0x100000, s_ioport_ctrl);
s->vga.bank_offset = 0;