<Table> Commodore 64 <Tr> <Td_colspan="2"> </Td> </Tr> <Tr> <Th> Manufacturer </Th> <Td> Commodore Business Machines (CBM) </Td> </Tr> <Tr> <Th> Type </Th> <Td> Home computer </Td> </Tr> <Tr> <Th> Release date </Th> <Td> August 1982 </Td> </Tr> <Tr> <Th> Introductory price </Th> <Td> US $595 (equivalent to $1,477 in 2016) </Td> </Tr> <Tr> <Th> Discontinued </Th> <Td> April 1994; 23 years ago (1994 - 04) </Td> </Tr> <Tr> <Th> Units sold </Th> <Td> 12.5--17 million </Td> </Tr> <Tr> <Th> Operating system </Th> <Td> Commodore KERNAL / Commodore BASIC 2.0 GEOS (optionally) </Td> </Tr> <Tr> <Th> CPU </Th> <Td> MOS Technology 6510 / 8500 @ 1.023 MHz (NTSC version) @ 0.985 MHz (PAL version) </Td> </Tr> <Tr> <Th> Memory </Th> <Td> 64 KB RAM + 20 KB ROM </Td> </Tr> <Tr> <Th> Graphics </Th> <Td> VIC - II (320 × 200, 16 colors, sprites, raster interrupt) </Td> </Tr> <Tr> <Th> Sound </Th> <Td> SID 6581 / 8580 (3 × osc, 4 × wave, filter, ADSR, ring) </Td> </Tr> <Tr> <Th> Connectivity </Th> <Td> 2 × CIA 6526 joystick, Power, ROM cartridge, RF, A / V, CBM - 488 floppy - printer, digital tape, GPIO / RS - 232 </Td> </Tr> <Tr> <Th> Predecessor </Th> <Td> Commodore VIC - 20 Commodore MAX Machine </Td> </Tr> <Tr> <Th> Successor </Th> <Td> Commodore 128 </Td> </Tr> </Table> <Tr> <Th> Manufacturer </Th> <Td> Commodore Business Machines (CBM) </Td> </Tr>

How much ram memory did the commodore 64 have