==== FPGA internal RAM size ====
It's to know that a FPGA chip contain 96KB internal RAM so you can't insert a dsk inside. This internal RAM is already used in part be T80 (z80 from opencores), the soundchip, and special RAM asynchronous '''ramb16_s16_s16''' (RAM with two different speed one for writing another for reading, in fact two RAM with a common part) that I use for VGA mode.
==== VHDL components size ====
T80 (z80 processor) take 100kgates