3 ms·
The main difference was that the 8086 had a 16-bit data bus while the 8088 had an 8-bit data bus, requiring two cycles to transfer 16 bits and therefore slowing
by timbit42 3y ago
The main difference was that the 8086 had a 16-bit data bus while the 8088 had an 8-bit data bus, requiring two cycles to transfer 16 bits and therefore slowing it down. This also has to do with why the IBM PC and IBM PC XT had an 8-bit expansion bus. The 16-bit ISA bus came with the IBM PC AT.