<P> The original PC 's maximum memory using IBM parts was 256 kB , achievable through the installation of 64 kB on the motherboard and three 64 kB expansion cards . The processor was an Intel 8088 running at 4.77 MHz , 4 / 3 the standard NTSC color burst frequency of 315 / 88 = 3.579 54 MHz . ( In early units , the Intel 8088 used was a 1978 version , later were 1978 / 81 / 2 versions of the Intel chip ; second - sourced AMDs were used after 1983 ) . Some owners replaced the 8088 with an NEC V20 for a slight increase in processing speed and support for real mode 80186 instructions . The V20 gained its speed increase through the use of a hardware multiplier which the 8088 lacked . An Intel 8087 coprocessor could also be added for hardware floating - point arithmetic . </P>
<P> The original PC 's maximum memory using IBM parts was 256 kB , achievable through the installation of 64 kB on the motherboard and three 64 kB expansion cards . The processor was an Intel 8088 running at 4.77 MHz , 4 / 3 the standard NTSC color burst frequency of 315 / 88 = 3.579 54 MHz . ( In early units , the Intel 8088 used was a 1978 version , later were 1978 / 81 / 2 versions of the Intel chip ; second - sourced AMDs were used after 1983 ) . Some owners replaced the 8088 with an NEC V20 for a slight increase in processing speed and support for real mode 80186 instructions . The V20 gained its speed increase through the use of a hardware multiplier which the 8088 lacked . An Intel 8087 coprocessor could also be added for hardware floating - point arithmetic . </P>
which processor was released in the first ibm pc
which processor was released in the first ibm pc
an Intel 8088
an Intel 8088