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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.
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.
6502 A 1 MHz chip used in KIM-1 and other single board computers in the mid-1970s. 6502A A 1.5 MHz chip used in Asteroids Deluxe and at 2 MHz in the BBC Micro: 6502B Version of the 6502 capable of running at a maximum speed of 3 MHz instead of 2 MHz. The B was used in both the Apple III and early Atari 8-bit computers, each running at ~1.8 MHz. [c]
WDC added new addressing modes to the BIT instruction that was present in the 6502, as well two new instructions for convenient manipulation of bit fields, a common activity in device drivers. BIT in the 65C02 adds immediate mode, zero page indexed by X and absolute indexed by X addressing. [ 15 ]
The Ricoh 2A03 [1] contains an unlicensed derivative of the MOS Technology 6502 core, modified to disable the 6502's binary-coded decimal mode (possibly to avoid a MOS Technology patent [2]). It also integrates a programmable sound generator (also known as APU, featuring twenty two memory-mapped I/O registers), [ 3 ] rudimentary DMA , and game ...
Charles Ingerham Peddle [2] (November 25, 1937 – December 15, 2019) [3] was an American electrical engineer best known as the main designer of the MOS Technology 6502 microprocessor, the KIM-1 single-board computer, and its successor, the Commodore PET personal computer, both based on the 6502.
Download as PDF; Printable version; ... [1] The MC6820 was used ... 6502 Assembly Language Programming 2nd Edition. Osborne/McGraw-Hill. ISBN ...
The VIA provides two 16-bit timer/counters. Each can be used in one-shot "interval timer" mode; timer 1 can also be used in "free-running" (divider/square wave) mode, in which the timer is automatically reloaded with the initial count when it reaches zero, and timer 2 can also be used in "pulse counting" mode, in which the timer will count the high-to-low state transitions of pin PB6 (the 7th ...