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Western Design Center 65C02

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	WDC 65C02 - Wikipedia, the free encyclopedia
		The WDC 65C02 8-bit CPU is an upgraded CMOS version of the popular and venerable MOS Technology 6502 microprocessor, the redesign being made by Bill Mensch of the Western Design Center (WDC).
		The 65C02 was second-sourced by NCR, GTE, Rockwell, Synertek and Sanyo.
		The 65C02 shared its predecessor's 8-bit instruction set architecture and 16-bit memory addressing, but added a small number of documented opcodes and, significantly, fixed the irksome "indirect jump page wrap bug" that caused fits for so many budding assembly language programmers.
	en.wikipedia.org /wiki/Western_Design_Center_65C02 (267 words)

	Western Design Center 65C02
		The 65C02 is a slightly upgraded version of the popular and venerable 6502 microprocessor.
		The 65C02 shared its predecessor's 8-bit instruction set architecture and 16-bit memory addressing.
		The 65C02 added a small number of documented opcodes and, significantly, fixed the irksome 'indirect jump page wrap bug' that caused fits for so many budding assembly language programmers.
	pedia.newsfilter.co.uk /wikipedia/w/we/western_design_center_65c02.html (102 words)

	[No title]
		Memory Access and Timing When the 65C02 accesses certain key I/O locations or writes to the active Apple IIe display memory, it is "Trapped" (or halted temporarily) and the address accessed and data read or written is latched so the information is available to the IIe Startup application running on the MacintoshJLC.
		65C02 Processor Speed The 65C02 processor on the Apple IIe Card can be run at two speeds; the normal Apple IIe 1 MHz or a fast speed of approximately 1.9 MHz.
		Normally, the 65C02 processor speed setting should be left at whatever the user of the system set it to with the Apple IIe Card option panel.
	www.umich.edu /~archive/apple2/technotes/tn/aiie/TN.AIIE.010 (2508 words)

	The 6502 Instruction Set Decoded
		Shown below are the instructions of the 6502, 65C02, and 65C816 processors.
		The bit manipulation instructions found only on the Rockwell and WDC versions of the 65C02 are not included in the table, nor are the "undocumented" instructions of the original 6502.
		Similarly, the test-and-branch instructions are of the form xyyy1111, where x is 0 to test whether the bit is 0, or 1 to test whether it is 1, and yyy is which bit to test.
	www.llx.com /~nparker/a2/opcodes.html (1503 words)

	apple-history.com :: Apple //c & //c+
		It came in a small white case, and was built around an enhanced 65C02 processor, running at 1.4 MHz.
		The Apple //c+ was introduced in 1988, with a 4 MHz 65C02, RAM expandable to over 1 MB, a larger ROM, and an optional internal 800 kB 3.5" drive.
		The three major changes were the internalization of the powersupply (previously an external brick-on-a-rope as users liked to call it), a built-in 800 kB 3.5 floppy drive replacing the older 5.25, and finally, the equivalent of a ZipChip 4 MHz accelerator built-in.
	history.eis.net.au /aIIc.html (904 words)

	AppleReferenceWeb
		It plugs in the motherboard replacing the existing 6502 or 65C02.
		It is 65C02 based for compatibility with the enhanced //e and //c.
		Adding this to an un enhanced computer will simply ad the 65C02 to the computer, but NOT give a fully 'enhanced' computer.
	www.apple2.org /A2WebRef/A2Reference40.html (166 words)

	Apple IIc
		It sold well until it was discontinued in September 1988 with the introduction of the IIc+, the last computer in the II series.
		The IIc+ included the new 800k 3.5" floppy drive, 65C02 running at an option of 1 or 4 MHz using a built-in processor switch, memory expansion capability, and ports with mini DIN-8 connectors (same as IIGS and Mac Plus).
		Though much better than the IIc, it did not fare well due to compatibility problems and the rise in popularity of the Macintosh line and Apple II clones.
	applemuseum.bott.org /sections/computers/IIc.html (597 words)

	Apple IIe
		The next of several versions of the IIe was one with a sharper display (560x192 fl and white, 140x192 in 16 colors).
		In March 1985 came the IIe enhanced, which was basically upgrading a IIe to IIc standards, including a new 65C02 processor, character generator, new ROM, and 2 more ROM chips for Applesoft BASIC and the monitor.
		All models were discontinued in November 1993 for a combine total of almost 11 years on Apple's production line, outliving every other model including the IIGS, discontinued the year before.
	applemuseum.bott.org /sections/computers/IIe.html (507 words)

	SB-Projects: sbasm, crosses, 6502 (Site not responding. Last check: 2007-10-21)
		There is a small difference in behaviour between the 6502 and the 65C02 when it comes to the Decimal flag.
		The Decimal flag of the 6502 is not initialized during reset, leaving it in an unpredictable state.
		This small bug is fixed on the 65C02 processors, but it wouldn't hurt to continue the habit of clearing the Decimal flag.
	www.xs4all.nl /~sbp/sbasm/6502.htm (2171 words)

	[No title]
		1990 65CE02 Annotations: 65C02: referred to as "Rockwell" in [1] (Rockwell was a popular licensee of the 65C02) 65CE02: the C64 preliminary documentation has been written in January 1991 In 1975, MOS Semiconductors introduced the 6502.
		This document only shows up the differences between the 65C02 and the 65CE02, and assumes that you are familiar with the 65C02.
		General differences between the 65C02 and the 65CE02 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 2.1 Enhancements of the 65SC02 ~~~~~~~~~~~~~~~~~~~~~~~~~~ 2.1.1 Bit Operations ~~~~~~~~~~~~~~ Both the 6502's and the 65C02's bit operation capabilities were poor.
	www.weihenstephan.org /~michaste/download/65ce02.txt (3876 words)

	cbm-hackers mailing list: 16MHz 65C02 (was RE: Doorst: rechten commodore) (Site not responding. Last check: 2007-10-21)
		Reply: jbevren_at_starbase.globalpc.net: "Re: 16MHz 65C02 (was RE: Doorst: rechten commodore)"
		Also the should be fast enough >> to run a semi-compatible >> emulator-on-a-cart as the CPU is near-enough and >> only the other I/O has to >> be simulated with the Mickey and Suzie chips.
		Whilst Orbital endeavours to take reasonable care to ensure that this email and any attachments are free from viruses or other defects, Orbital does not represent or warrant that such is explicitly the case (C) 2000: Orbital Engine Company (Australia) PTY LTD and its affiliates - This message was sent through the cbm-hackers mailing list.
	www.softwolves.pp.se /misc/arkiv/cbm-hackers/4/4894.html (391 words)

	[No title]
		There are no known incompatibilities with this chip, except for those that already exist for the 65C02.
		The entire 65C02 instruction set is supported, with the exception of the so called Rockwell codes.
		Those codes only exist on the Rockwel1 version of the 65C02 and do not exist on the versions used by Apple Computer for the //c or the //e enhancement.
	www.textfiles.com /apple/DOCUMENTATION/merlin.screen.e (5533 words)

	Read about 65C02 Microprocessor at WorldVillage Encyclopedia. Research 65C02 Microprocessor and learn about 65C02 ... (Site not responding. Last check: 2007-10-21)
		The 65C02 Microprocessor is a slightly upgraded version of the popular and venerable
		While the redesign was made by Bill Mensch of Western Design Center, the 65C02 was likewise manufactured by other semiconductor companies such as
		The 65C02 added a small number of documented opcodes and, significantly, fixed the irksome 'indirect jump page wrap bug' that caused fits for so many budding assembly language
	encyclopedia.worldvillage.com /s/b/Western_Design_Center_65C02 (217 words)

	[No title]
		Date: 12 Jul 93 05:39:00 GMT Organization: Georgia Institute of Technology Lines: 52 This is something I've been messing around with for the past few weeks posted here for your interest and enjoyment.
		There may indeed be bugs, especially in the 65c02 emulator part, since I have not tested it exhaustively, but all this has reached the stage where I thought that someone else might find it interesting.
		If anyone gets this stuff up, send me some mail since I plan on testing the 65c02 emulator to make sure that it is correct, and improving it.
	www.gno.org /pub/apple2/emulators/emul65c02/readme (434 words)

	65C02 Introduction (Site not responding. Last check: 2007-10-21)
		Using my 6502 section as the template, I have extended the reference section to cover the 65C02 processor.
		As many of the pages in the 6502 section apply equally to the 65C02 I have not duplicated them here, just the main reference and addressing mode pages.
		Addressing describes each of the 65C02 memory addressing modes.
	www.obelisk.demon.co.uk /65C02 (93 words)

	6502 Cross-Development Languages and Tools (Site not responding. Last check: 2007-10-21)
		Includes a 65C02 cross macro assembler along with a collection of files and routines for Amiga programmers.
		Supports 65C02 and 65816 CPUs using standard syntax, and provides conditional assembly, produces relocatable code, and supports segments.
		Includes 65C02 and 65C112 macro assembler, linker, locater, librarian, etc. Will generate Intel hex, Intel OMF85, Tek hex, Motorola S-record, Zilog ABS and binary output.
	www.npsnet.com /danf/cbm/cross-development.html (2326 words)

	cc65 mailing list archive: Re: [cc65] da65 + 65C02 (Site not responding. Last check: 2007-10-21)
		For me it is easier to spot regions where.byte is intermixed with code than to look for a '!' somewhere in a line.
		We can also talk about adding something like '!', but I think this gets messy quite soon, because one would also need to mark instructions that are available in the 65SC02 but not in the 65C02.
		And once there is support for the 65816, things become even more difficult.
	www.cc65.org /mailarchive/2003-09/3348.html (395 words)

	6502.org: Homebuilt Projects
		Daniel's T65 - Daniel Wallner has created T65, a free 6502 VHDL core that supports the 6502, 65C02, and 65C816 instruction sets.
		Daryl's 65C02 SBC - Using ExpressPCB.com's Mini-Board service, Daryl Rictor managed to squeeze a 65C02, 6526, RAM, ROM, and all associated circuitry on a tiny 3.8"x2.5" board.
		He has built some very interesting projects, including a 16450-based COM port, AD1848-based audio output, an SBC with an overclocked 65C02, and a fuel injection computer based on the 65SC816.
	www.6502.org /homebuilt (1480 words)

	65C02 Reference Manual (Site not responding. Last check: 2007-10-21)
		The Western Design Center, Inc. (WDC) of Mesa, AZ, is the original designer and intellectual property owner of the 65C02.
		The 65C02 has a 16 bit address space (64K) arranged in 256 pages each of which is 256 bytes long.
		The 65C02 has 3 registers, stack pointer, processor flags (P), and program counter.
	www.zophar.net /tech/files/6502ref.html (1047 words)

	Re: mmu for 65c02 [cbm-hackers mailing list] (Site not responding. Last check: 2007-10-21)
		Next message: Greg King: "Re: mmu for 65c02"
		Previous message: Jim Brain: "Re: mmu for 65c02"
		In reply to: Jim Brain: "Re: mmu for 65c02"
	www.softwolves.pp.se /misc/arkiv/cbm-hackers/10/10394.html (252 words)

	[No title]
		Michal Kowalski has updated this a number of times and it has become a 'couldn't do without' tool.
		Daryl has a couple of designs for 65C02 single board computers.
		His SBC-2 has run EhBASIC and there is also a version of EhBASIC for his 65C02 simulator.
	members.lycos.co.uk /leeedavison/links (316 words)

	YAE, Yet another Apple ][ Emulator (Site not responding. Last check: 2007-10-21)
		It is tuned for speed on RISC based systems by employing compiler technology and dirty but fast C coding.
		Sun & MIPS (SGI & DECstations) version of the emulator translates on-the-fly 65C02 machine code into equivalent native code.
		After a break of more than a year, I want to pick up YAE again to make it more prensentable.
	www.netfront.net:6502 (979 words)

	6502 CPU
		Where this is so, I have followed the pinout diagrams, which seem to make the most sense.
		Rockwell licensed the 65C02 design from Western Design Centre, and used it in their modem chip sets that became the main business.
		Conexant, and their website makes no mention of 65C02 chips so I assume they are no longer sell them
	www.howell1964.freeserve.co.uk /parts/6502_CPU.htm (585 words)

	Manpage of CRASM
		A program listing and a symbol table are also produced on the standard output.
		The current version of crasm can assemble programs for the 6800, 6801, 6803, 6502, 65C02, and Z80 processors.
		The full list is printed when you invoke crasm without arguments.
	crasm.sourceforge.net (775 words)

	Daryl's 65C02 Single board Computer (Site not responding. Last check: 2007-10-21)
		Then came the PC boom, and I took up programming in Quick BASIC and later "C".
		Lately, I have had the urge to build some specialized controllers and decided the 65C02 would be perfect for the task.
		I wanted to be able to develop software on my PC and decided to write a 65C02 Simulator to simplify design and debugging.
	users.softcom.net /darylr (612 words)

	6502 Web Ring
		Supplier of the 65c02 and 65c816 microprocessors, 65c134 and 65c265 microcontrollers, 65c22 VIA GPIO interface and Developer Kits for C and assembly language.
		I have created several 65C02 based SBC's with a simple OS.
		In the beginning all the programs were written for the 6502 microprocessor, but as the Apple II family developed, this expanded to the 65C02, 65802, and 65816.
	t.webring.com /hub?ring=6502webring (291 words)

	[No title] (Site not responding. Last check: 2007-10-21)
		What to Replace: To upgrade an Apple IIe the four integrated circuit chips must be replaced with new upgraded chips.
		Two new monitor ROMs, which allow your enhanced IIe to run software that incorporates features such as faster scrolling and smoother-looking graphics.
		A 65C02 microprocessor, which replaces the 6502 microprocessor, and gives the IIe the ability to run current software.
	www.intrec.com /proterm-a2/a2_tips_tricks/a2_enhance.txt (1497 words)

	cc65 mailing list archive: Re: [cc65] da65 + 65C02 (Site not responding. Last check: 2007-10-21)
		In reply to: Keates, Mark: "RE: [cc65] da65 + 65C02"
		Next in thread: Christian Krüger: "Re: [cc65] da65 + 65C02"
		On Thursday 04 September 2003 11:47, Keates, Mark wrote: > Hi Christian, > > > BTW: As you allready know, I would like to differ between 65C02 and > > 65SC02 especially when I have to disassemble something...
	www.cc65.org /mailarchive/2003-09/3344.html (235 words)

	[No title]
		BBC Emulator Development List: Mike Borcherds mailto:borchrds.teaching@physics.oxford.ac.uk Fri, 23 Sep 94 12:56:54 +0100 UNDOCUMENTED 6502 OP-CODES Those prefixed with a * still represent illegal instructions on the 65C02, but do not necessarily perform the same function as on the 6502.
		Those without a * symbol are new, legal 65C02 op-codes, see second column.
		Instruction (6502) Instruction (65C02) * 02 HALT ?
	www.mdfsnet.f9.co.uk /Docs/Comp/6502/UnDoc65 (578 words)

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