The 65xx microprocessor was produced in a surprising number of variants, the smaller versions traded address space against interrupts and other functions. Today, only the basic design, the 6502 is remembered.
Two series were produced, the 650x, which had a clock on the chip and the 651x series, which had an external clock. This latter was intended for use in multi chip applications where accurate synchronisation was important.
What is interesting, is that it was considered worthwhile at
the time to produce so many variants in each series to reduce the
cost of the final product. The designers could have had little
insight then into the enormous price reductions that were soon to
come.
Processor | Pins | Address Space | Features |
---|---|---|---|
6502 | 40 | 64K |
|
6503 | 28 | 4K |
|
6504 | 28 | 8K |
|
6505 | 28 | 4K |
|
6506 | 28 | 4K |
|
6512 | 40 | 64K |
|
6513 | 28 | 4K |
|
6514 | 28 | 8K |
|
6515 | 28 | 4K |
|