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The 65xx family of microprocessors, consisting of the MOS Technology 6502 and its derivatives, the WDC 65C02, WDC 65C802 and WDC 65C816, and CSG 65CE02, all handle interrupts in a similar fashion. There are three hardware interrupt signals common to all 65xx processors and one software interrupt, the BRK instruction.
More importantly, the style of access changed. In the 6800, IX held a 16-bit address which was offset by an 8-bit number stored with the instruction and added to the address. In the 6502 (and most other contemporary designs), the 16-bit base address was stored in the instruction, and the 8-bit X or Y was added to it. [44]
The CSG 65CE02 is an 8/16-bit microprocessor developed by Commodore Semiconductor Group in 1988. [1] It is a member of the MOS Technology 6502 family, developed from the CMOS WDC 65C02 released by the Western Design Center in 1983.
Download as PDF; Printable version; ... Instruction set: MOS 6502: Physical specifications ... The primary change from the 6502 is the addition of an 8-bit general ...
The Mitsubishi 740, also known as MELPS 740, is a series of 8-bit CMOS microcontrollers and microprocessors with an enhanced MOS Technology 6502 compatible core based on the expanded WDC 65C02. The ICs were manufactured by Mitsubishi Electric during the 1980s and 1990s.
The Mensch Computer is a personal computer system produced by the Western Design Center (WDC). It is based on the WDC 65C265 microcontroller, which implements the instruction sets of two microprocessors: the 16-bit W65C816/65816, and the 8-bit 6502. [1]
In 6502 assembly language, the above two instructions both accomplish the same thing: they load the value of memory location $12 into the .A (accumulator) register ($ is Motorola/MOS Technology assembly language notation for a hexadecimal number). However, the first instruction is only two bytes long and requires three clock cycles to complete.
The category of 65xx microprocessors consists of articles about MOS Technology's venerable 65xx family of 8-bit processors, as well as compatible 8/16-bit developments of the architecture by other companies.