#Microcontroller 6502 emulator full
More, we have been working towards a public launch, currently planned for spring 2022, building the MOnSter into a shadowboxĮnclosure complete with a tiny hidden "motherboard" that the CPU sits in, so that it can run demonstration programs even without being plugged into a separate computer.ĭoes it run at the full speed of an original 6502 chip?
In the process of doing so, we have built up a single-board computer (a tiny motherboard) that uses the 6502 as its CPU, such that you can either use a socketed (vintage) 6502 IC, or the MOnSter 6502 through a cable. Since the 6502 is just a microprocessor (CPU), about half of our work on the project (and most of our work since the first prototype) has actually been building up the capabilities around this processor - adding interfaces for a keyboard, monitor, and programming - so that you can actually use it.
#Microcontroller 6502 emulator Patch
Our second prototype, a year later, fixed a few issues that we encountered when bringing up the first version (removing all of the patch wires) but also added over 100 additional LEDs, including one for every instruction decode line on the 6502's decode ROM. We brought it up to the stages of successfully running various programs in assembly, BASIC, and Forth. The first full-scale prototype was publicly demonstrated at the 2016 Bay Area Maker Faire. Headed towards a full public launch delayed a bit by COVID. What is the current status of the project?
In addition to these, there are also LEDs sprinkled throughout that indicate the values of various control lines, registers, and status bits, as well as additional transistors and resistors (not counted in those "functional" totals) that are necessary to drive those LEDs.Īs of the second revision of the board, the design statistics are as follows: There are 3218 transistors and 1019 resistors that comprise the "functional" part of the 6502. In total, there are 4769 components on the board. How many components are there on the board? It's a four layer circuit board, 12 × 15 inches, 0.1 inches thick, with surface mount components on both sides. MOnSter 6502 is a play on the original manufacturer and device name (MOS 6502) as well as acknowledging its large size. Slight variations of it were found in the Commodore 64, the Atari 2600, and the original Nintendo Entertainment System. The 6502 is the famous processor found at the core of such influential computer systems as the Apple ][, the Commodore PET, the Atari 400 and 800 home video game consoles, the BBC Micro, and the Tamagotchi digital pet. A dis-integrated circuit project to make a complete, working transistor-scale replica of the classic MOS 6502 microprocessor.
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