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	MOS Technology 6502 - Wikipedia, the free encyclopedia
		The 6502 had one feature that made it particularly good for a home computer system, a small period in each cycle during which it was guaranteed not to be accessing the bus.
		The 6502 was next used in the Apple II family, and then quickly appeared in various Commodore and Atari home computers, the BBC Micro family, and a huge number of other designs now lost to history.
		The 6502 used in the NES was a modified version (called 2A03 in NTSC-consoles and 2A07 in PAL-consoles the difference being different clock divider) that was produced solely for Nintendo.
	en.wikipedia.org /wiki/MOS_Technology_6502 (1573 words)

	MOS TECHNOLOGY 6502 FACTS AND INFORMATION (Site not responding. Last check: 2007-10-21)
		The 6502 design was originally second-sourced by Rockwell and Synertek and later licensed to a number of companies; it is still made for embedded_systems.
		The 6502 was next used in the Apple_II_family, and then quickly appeared in various Commodore and Atari home computers, the BBC_Micro family, and a huge number of other designs now lost to history.
		The instruction decoding in the 6502 is implemented by a hardwired logic array (similar to a programmable_logic_array) which is only defined for valid opcodes.
	www.witwik.com /MOS_Technology_6502 (1511 words)

	MOS Technologies 6502 : 6502
		The 6502 was released to the market in September 1975 at $25, while at the same show the 6800 and Intel 8008 were selling for $179.
		The 6502 had one feature that made it particularily good for a home computer system, a small delay in which it was guarenteed to not be using the bus.
		The 6502 used in the NES was a modified version that was produced solely for Nintendo, called "2A03".
	www.fastload.org /65/6502.html (999 words)

	6502 - BlueRider.com
		Back when the 6502 was introduced, RAM was actually faster than CPUs, so it made sense to optimize for RAM access rather than increase the number of registers on a chip.
		The 6502 was used in the BBC Microcomputer, Apple II, Commodore, Apple Computer and Atari personal computers.
		There is a 6502 assembler by Doug Jones jones@cs.uiowa.edu which supports macros and conditional features and can be used for linkage editing of object files.
	6502.bluerider.com /wordsearch/6502 (281 words)

	Apple II History Museum - Articles
		It was Mensch who spearheaded a re-creation of the 6502 processor into the lower-powered 65c02, which included the additional assembly language opcodes that made it possible to "crunch" the ROM code in the Apple IIc small enough to fit in its additional built-in functions without excessively complicating the design or coding.
		The [6502] that was at the heart of the Apple II and Commodore 64, among others, was passed from MOS Technology to Synertek to Rockwell, and it might have faded entirely from the microprocessor scene if it were not for one determined individual -- William D. Mensch, Jr.
		The 6501 was pin-compatible with the 6800, whereas the 6502 added the innovation of an on-chip clock generator, which eliminated the need for the two-phase clock input but gave the chip a different pinout.
	apple2history.org /museum/articles/microreport/microreport.html (1149 words)

	CPU-World: MOS Technology 6502 microprocessor family
		MOS Technology 6502 and other 650x/651x processors are a family of inexpensive 8-bit microprocessors.
		Stack size of the 6502 was limited to 256 bytes.
		The 6502 microprocessor had 13 addressing modes, some of these modes made extensive use of two 8-bit index registers.
	www.cpu-world.com /CPUs/650x (175 words)

	Dan B's 6502 Tech Page
		The 6502 was a very popular 8-bit microprocessor in the late 70's and 80's.
		DASM.ZIP: This is a new 6502 cross assembler for MSDOS.
		It is identical to the standard 6502 except that it has a HALT input for stopping the processor and tri-stating the system bus so that other chips in the system can do DMA.
	atarihq.com /danb/6502.shtml (787 words)

	[No title]
		The NES's 6502 only runs at 1.79 MHz, and with 6502 instructions averaging 3.5 to 4 clock cycles, the equivelant inlined x86 (assembly-written) code can emulate the behaviour of most 6502 instructions in 15 clock cycles or less on a 486.
		Because the 6502's memory map is nonlinear, when the 6502 engine needs to read/write memory from/to a part of the NES's memory map, use part of the target address to index into a table of pointers.
		Because the 6502 is always fetching instructions, and in a sequential mannar, it is more efficient to maintain the 6502's PC as a 32-bit IPC register (Indexed PC) which points to the physical address at which the instructions reside.
	www.nesworld.com /dev/nesdiscu.txt (2989 words)

	6502.org: Home
		A collection of early publications from the heyday of the 6502 is available inside the Documents Archive.
		Modern 6502 software is almost always cross-developed on a PC or workstation platform.
		Information and links useful to the 6502 developer which may not be specifically geared for the 6502.
	www.6502.org (362 words)

	commodore.ca \| The New 6500 Processors (CPU) by Jim Butterfield (Site not responding. Last check: 2007-10-21)
		The 6510 is a 6502, except that addresses 0000 and 0001 have special functions.
		Otherwise, the 6510 is identical to a 6502.
		The 6509, too, is a 6502 with a change to addresses 0000 and 0001.
	www.commodore.ca /history/company/6502/6500cpus.htm (1123 words)

	DIY ("Do-It-Yourself") 6502 computer
		One of these is the 6502, which has been used in a number of home computers.
		The 6502 is an ideal processor for a prototype.
		The 6502 prototype board is surprisingly easy to build, and if you build it on a bigger board than is needed, it can be expanded and enhanced later.
	www.hytherion.com /beattidp/comput/x65tools/diy6502/diy6502.htm (1761 words)

	SB-Projects: sbasm, crosses, 6502 (Site not responding. Last check: 2007-10-21)
		The most important bugs of the 6502 were eliminated with this new device, but most important a few extra instructions and addressing modes were added as well.
		The 6502 has 2 index registers, called X and Y. They are both 8 bits wide and can be used as temporary registers, or as index pointers in a variety of addressing modes.
		The Decimal flag of the 6502 is not initialized during reset, leaving it in an unpredictable state.
	www.xs4all.nl /~sbp/sbasm/6502.htm (2171 words)

	RoadBikeReview Forums - Flight Deck 6500 v. 6501 v. 6502
		Regardless of whether you opt for the wired or wireless version, you're limited to hooking the sensor to the front wheel which sucks if you want to hook the sensor to the back wheel in order to have cadence available while on a trainer.
		Lickbikes.com has the 6502 for $38.99 and the wireless harness for $59 with $6 shipping.
		It also appears based on the earlier comment that both the 6501 and 6502 require the updated '1 button per harness' configuration regardless of whether you opt for the wired or wireless harness.
	forums.roadbikereview.com /showthread.php?t=11433 (1017 words)

	Zophar's Domain: 6502/65C02 Technical Documents (Site not responding. Last check: 2007-10-21)
		This is a nice reference doc to the 6502 processor that explains what opcodes exist and somewhat what they do.
		This is the 6502 core that was used in EMU earlier.
		This is the 6502 core that Sardu used for NESTicle, and I think that Sardu will stand strong as a brand for good quality and speed for quite some time.
	www.zophar.net /tech/6502.html (272 words)

	The 6502 Instruction Set Decoded
		Though the 6502 instruction set has a number of quirks and irregularities, large portions of it can be broken up into regular patterns.
		An understanding of these patterns can be beneficial to authors of assemblers or disassemblers for 6502 code--for example, the Apple II ROM uses the information described below to greatly reduce the size of the instruction tables used by the built-in machine language disassembler.
		Usually some mixture of the two, in a manner that varies depending on who made the 6502, when it was made, the phase of the moon, and other unpredictable variables.
	www.llx.com /~nparker/a2/opcodes.html (1503 words)

	The First Great 6502 Project
		Clearly, the 6502 was the chip to use in the early-to-mid 1980s, and today it remains an important chip among vintage electronics hobbyists.
		Connect RS0 on the VIA to A0 on the 6502, RS1 on the VIA to A1 on the 6502, RS2 on the VIA to A2 on the 6502, and RS3 on the VIA to A3 on the 6502.
		Since the 6502 treats your I/O chip as just another memory chip, we end up with two memory-mapped chips on this computer, and thus we need a way for the CPU to choose which is which.
	www.geocities.com /SiliconValley/2072/6502prj1.htm (4835 words)

	Commodore Hacking Issue 13: OS/A65 - a Multitasking/Multithreading Operating System for 6502 Computers (Site not responding. Last check: 2007-10-21)
		Although the project never succeeded (well, to a certain extent it worked, but then we always got new ideas...), the project gave me an idea of what an OS should be capable of.
		As there are problems with this in the 6502 (think of the stack), another concept should at least be mentioned.
		The 6502 has only three multi-purpose registers, and all are 8 bits.
	www.canberra.edu.au /~scott/C=Hacking/C-Hacking13/os.html (3532 words)

	The Story Behind Apex/XPL0 and the 6502 Group
		Wayne Wall was one of the first to appreciate the power and speed of the 6502, and he decided to form a subgroup of DACS for 6502 users.
		There were several DEC employees in the 6502 Group, and they used floppy disks to boot some of their big mainframes.
		Suddenly the 6502 was at the heart of the most popular microcomputer in the world.
	www.6502group.org /hist6502.html (2906 words)

	6502 Stuff (Site not responding. Last check: 2007-10-21)
		This 6502 SBC was used as the processor in a Alarm system.
		This 6502 single board computer was used as the processor in an alarm system.
		The resulting Hex file was used to program the eprom on the 6502 single board computer.
	www3.sympatico.ca /ideazone/6502.html (161 words)

	NESHQ - 6502 and Programming Information
		6502SIM is a 6502 processor simulator for MSDOS that can be used as a tool for developing and testing generic 6502 code.
		Since this is an NES Site and not a 6502 hacking/programming site I have included only a portion of the total 6502 information available on the web.
		Those seeking further info on the 6502 should head in the direction of Stephen Judd's The Fridge, which is one of the most comprehensive 6502 information sites I've seen on the net.
	www.neshq.com /hardware/6502 (272 words)

	6502 Cross-Development Languages and Tools (Site not responding. Last check: 2007-10-21)
		as6502 is a 2 pass cross assembler for the 6502 microprocessor.
		The assembler is a one pass macroassembler and is able to output code for the 6502, the 65SC02 and 65SC816.
		This 6502 disassembler does not only disassemble your file but also tries to determine which part of the program is code and which part is data by analysing the complete program.
	www.npsnet.com /danf/cbm/cross-development.html (2326 words)

	6502 Control Logic (Site not responding. Last check: 2007-10-21)
		The control logic for 6502 was designed to contain the minimal number of states to try to simplify the actual gate logic once it is compiled.
		Also it is crucial as mentioned previously, to match the actual 6502 cycle times.
		This required studying the different op codes to understand why the original engineers of the 6502 chose the different encodings.
	graphics.stanford.edu /~ianbuck/proj/Nintendo/node18.html (231 words)

	UK101 and 6502 Links
		The 6502 processor was designed in about 1975 by MOS Technology, Inc. of Norristown, PA. Commodore bought the company in 1977.
		Nowadays, you'll find enthusiastic support for the 6502 at 6502.org, where there is a full set of data sheets as well as a software library.
		The chip collections at CPU World show what the packaged 6502 chip looks like, as well as showing all the second-source manufacturers.
	www.gifford.co.uk /~coredump/uklink.htm (291 words)

	Search: 6502 - Info.co.uk (Site not responding. Last check: 2007-10-21)
		6502 was designed primarily by the same team that had designed the Motorola...
		The result was the "lawsuit-compatible" 6502, differing only by a pinout...
		6502 processor into the lower-powered 65c02, which included the...
	dpxml.infospace.com /infocom.uk/results?otmpl=dog/webresults.htm&qkw=6502&CMP=KNC-3LS480536328&infoad=1 (307 words)

	6502 (Site not responding. Last check: 2007-10-21)
		The 6502 represented a major step forward in the microcomputer revolution.
		The package includes a version of KIMATH which is in a format readable by the assembler available elsewhere on this web site, and a version in Intel hex format.
		The 6502 simulator, which resembles a KIM-1 and is called Soft6502, can be found here.
	www.crbond.com /6502.htm (210 words)

	as6502 -- A Cross Assembler for the 6502 (Site not responding. Last check: 2007-10-21)
		This is a version of the 6502 cross assembler originally written by
		This version supports the undocumented instructions of the 6502 and writes raw binary files.
		The Atari 2600 has a 6502 variant in it, the 6507.
	www.whimsey.com /as6502 (71 words)

	The Commodore VIC-20
		Although it was not originally planned to be released publicly, the result was a decent "C" Compiler that could benefit the 6502 retrocomputing community.
		The 6502 was an ideal target for this experiment, because it is far from being an ideal processor!
		CC65 is a mature 6502 C compiler (based on an Atari 8 bit compiler), ported to the Commodore 64 and 128.
	www.kdef.com /geek/vic/quetz.html (1061 words)

	1.11) What are the 6502, ANTIC, CTIA/GTIA, POKEY, and FREDDIE chips? (Site not responding. Last check: 2007-10-21)
		These chips were designed by Atari engineers primarily to take much of the burden of housekeeping off of the 6502, thereby freeing the 6502 to concentrate on computations.
		Each of these chips is almost as big (in terms of silicon area) as a 6502, so the three of them together provide a tremendous amount of power.
		The ANTIC/6502 select bits in combination with the 6502 halt line, control the switching of the PIA bank number bits to A14/A15 and which bank of memory RAS goes to.
	www.faqs.org /faqs/atari-8-bit/faq/section-12.html (1505 words)

	The Incredible 6502 (Site not responding. Last check: 2007-10-21)
		Here's my little tribute to the incredible 6502, the highly successful 8-bit microprocessor of the 1970s and 80s.
		A simple 6502 assembler in C and Perl
		A list of machines that use the 6502 or variant
	www.geocities.com /oneelkruns/65index.html (70 words)

	EMCO 6502 (Site not responding. Last check: 2007-10-21)
		The EMCO 6502 is an active receiving loop antenna.
		A preamplifier is built into the base and provides a 50 ohm output.
		Front panel controls and indicators for the preamplifier include a power switch, power-on indicator, saturation indicator, and a receptacle for a battery charger.
	www.dovebidtmg.com /details.php?id=980 (88 words)

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