without valid/invalid bit
page table entry size is 11 bits to address..page frames...11 bits means 2^11 frames available...
no. of frames = physical address space/frame size
frame size is same as page size
physical address space = no. of frames* frame size
= 211* 512 byte = 220 B
valid/invalid bit included...10 bits are remaining...for addressing ...page frames..1bit to identify..page is valid or invalid...
physical address space = 210 * 512 byte = 219 byte....