The 6507 is an 8-bit microprocessor from MOS Technology, Inc. It is a "cut down" version of their popular 6502. To reduce costs the 6507 included only thirteen address pins instead of the 6502's sixteen. This allowed the 6507 to address 8 KB of memory, which at the time (1975) was considered to be a lot. The omission of these lines allowed the 6507 to come in a smaller 28-pin package, instead of the 40 pins of the 6502.
In addition to the reduced...
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The 6507 is an 8-bit microprocessor from MOS Technology, Inc. It is a "cut down" version of their popular 6502. To reduce costs the 6507 included only thirteen address pins instead of the 6502's sixteen. This allowed the 6507 to address 8 KB of memory, which at the time (1975) was considered to be a lot. The omission of these lines allowed the 6507 to come in a smaller 28-pin package, instead of the 40 pins of the 6502.
In addition to the reduced address bus, the 6507 is also unable to service external interrupts, but is otherwise identical to the 6502. The 6507 was only widely used in two applications, the bestselling Atari 2600 video game console and the Atari 8-bit family floppy disk controllers for the 810 and 1050 drives. In the 2600, the system was further limited by the design of the cartridge slot, which allowed for only 4KB of external memory to be addressed (the other 4KB was reserved for the internal RAM and I/O chip). Most other machines, notably home computers based on...
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