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Bill Mensch joined Motorola in June 1971 after graduating from the University of Arizona (at age 26). John Buchanan was the designer of the 6800 chip and Rod Orgill, who later did the 6501, assisted Buchanan with circuit analyses and chip layout.

6502 EMULATOR MAC FULL

The chip layout began in late 1972, the first 6800 chips were fabricated in February 1974 and the full family was officially released in November 1974. Motorola started the 6800 microprocessor project in 1971 with Tom Bennett as the main architect. The 6502 was designed by many of the same engineers that had designed the Motorola 6800 microprocessor family. Motorola 6800 demonstration board built by Chuck Peddle and John Buchanan in 1974 In its CMOS form (the 65C02, which was developed by the Western Design Center), the 6502 family continues to be widely used in embedded systems, with estimated production volumes in the hundreds of millions. In the early days of the 6502, it was second-sourced by Rockwell and Synertek, and later licensed to other companies. Soon after the 6502's introduction, MOS Technology was purchased outright by Commodore International, who continued to sell the microprocessor and licenses to other manufacturers. Popular video game consoles and computers, such as the Atari 2600, Atari 8-bit family, Apple II, Nintendo Entertainment System, Commodore 64, Atari Lynx, BBC Micro and others, use the 6502 or variations of the basic design.

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Along with the Zilog Z80, it sparked a series of projects that resulted in the home computer revolution of the early 1980s. Its introduction caused rapid decreases in pricing across the entire processor market. It initially sold for less than one-sixth the cost of competing designs from larger companies, such as the 6800 or Intel 8080. When it was introduced in 1975, the 6502 was the least expensive microprocessor on the market by a considerable margin. The design team had formerly worked at Motorola on the Motorola 6800 project the 6502 is essentially a simplified, less expensive and faster version of that design. Then I could test on various or select embedded hardware platforms I have in my possession (or did I say obsession?).ДЄnd maybe even use one with an LCD, and modify the emulation to support the screen editor and hi-res graphics support, either hooked or emulated, and support file loading from SD.The MOS Technology 6502 (typically pronounced 'sixty-five-oh-two' or 'six-five-oh-two') is an 8-bit microprocessor that was designed by a small team led by Chuck Peddle for MOS Technology. W hat's next? I'm toying with replicating the static recompilation, to C would work best for me. Saturday April 4 I was able to fix some I/O issues, and check in TED (C16, Plus/4) and PET 2001 support. Watch out 128, I'm going to get you next. Turns out it needed memory banking (damn you TED!) so there you go, revised the memory scheme from an array, to a C# class that each machine type can handle those accesses including banking support. Sleep, maybe some, but TED was bothering me. Monday night March 30 I created this blog entry.

All the more reason to keep my head low and focus on something else. Then checked in backspace support early Monday, March 30 before heading to my real world job of working at home (how convenient!). Currently, referenced memory is not shown, that would be a good enhancement for the future. Registers and flags are shown to the left of the statement's disassembly, in their states prior to executing the statement. Note that this slows down the emulation significantly, but provides very good insight. Trace Execution: It is possible to trace some or all of execution by setting the ace to true, and it will produce debug output (see in your IDE, or capture with DebugView).

No graphics (you know this is a terminal/console window right?).

6502 EMULATOR MAC WINDOWS

No loading or saving of files implemented (but Windows clipboard works!).

VIC-20 has just 5K RAM including screen memory (you can add more memory at the command line). C64 has just 44K RAM, 16K ROM, 1K VIC-II color RAM nybbles. Not full 64K RAM despite what the startup screen says. Now also supports Home/Left/Right/Up/Down output characters (not input).

But does support CHR$(147) for clear screen.

No PETSCII graphic characters, only supports printables CHR$(32) to CHR$(126).

6502 EMULATOR MAC SOFTWARE

No screen editing (gasp!) Just short and sweet for running C64 BASIC in terminal/console window via 6502 chip emulation in software.Text and background colors are implemented, but disabled by default because mapping to the standard console colors results in some fairly horrible color combinations. function keys, cursor keys, color keys, STOP/RESTORE, etc. No asynchronous input (GET K$), but INPUT S$ works.

6502 emulator mac