Zu Ehren von Chuck Peddle, des verstorbenen Vaters der Homecomputer-Revolution, hier der riesige Monster 6502, über den ich vor ein paar Jahren schon einmal gebloggt habe. Der 30x40cm große CPU ist ein funktionsfähiger Nachbau des legendären Chips und wurschtelt und blinkt mittlerweile in einem schwarzen Rahmen vor sich hin. Nach wie vor ein Einzelstück, es soll aber irgendwann ein Bausatz zum Selberbasteln erscheinen.
Hackaday: A DIS-INTEGRATED 6502
The MOnSter 6502 began as a thought experiment between [Eric] and [Windell Oskay], the guy behind Evil Mad Scientist and creator of the discrete 555 and dis-integrated 741 kits. After realizing that a few thousand transistors could fit on a single panel, [Eric] grabbed the netlist of the 6502 from Visual6502.org. With the help of several scripts, and placing 4,304 components into a board design, the 6502 was made dis-integrated. If you’re building a CPU made out of discrete components, it only makes sense to add a bunch of LEDs, so [Eric] threw a few of these on the data and address lines.
Von der Website zum Monster-CPU:
What’s with the name and capitalization?
MOnSter 6502 is a play on the original manufacturer and device name (MOS 6502) as well as acknowledging its large size.
How big is it?
It’s a four layer circuit board, 12 × 15 inches, 0.1 inches thick, with surface mount components on both sides.
How many components are there on the board?
In total, there are 4769 components on the board. There are 3218 transistors and 1019 resistors that comprise the “functional” part of the 6502. 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.
- Components that correspond 1:1 with transistors in the original 6502:
- Total active transistors: 4237
- 3218 enhancement mode n-channel MOSFETs
- 2588 discrete
- 630 located on 164 quad transistor array chips (26 of these 656 transistors are not used)
- 1019 resistors (the original 6502 used depletion mode MOSFETs in place of resistors)
- 998 Additional parts present only in the MOnSter 6502:
- 313 LEDs (The first revision board, shown in the video, has only 167 LEDs)
- 270 extra MOSFETs for driving the LEDs
- 20 filter capacitors
- 32 bus capacitors
- 2 zero-ohm jumpers for net tie reasons
- 8 current limit resistors
- 314 resistors for the LEDs
- 36 diodes for ESD protection
- 2 jacks for 5 V power: main and alternate location
- 1 rectangular connector for the 40-pin “ICR” ribbon cable
- Total parts: 4769
Are you nuts?