Build Instructions

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• 1

  Hardware Setup

  Connect 8 LED's through 10k resistors to Arduino pins 2 through 9.   I use green LED's for the first 4, and red LED's for pins 6-9.

  Connect a momentary push button to the ground rail and pin 10 for the "Enter" button, another to pin 11 for the "Down" button and one to pin 12 for the "Up" button.

  If you need to remap anything, it can be changed by modifying the defines in the Arduino sketch.

  You'll also need a USB cable to connect the Arduino to your computer to flash the sketch,  as well as for interacting with Eep over the serial interface.

• 2

  Software Setup

  The eep_oop_ork.ino sketch can be loaded using the standard Arduino IDE.   Once flashed, Eep will communicate on the Arduino's USB-Serial at 115200bps.

• 3

  Understanding Eep's hardware buttons and blinky lights

  For this step, I'll refer to the LEDs as 0 through 7. LED 0 being the one that's connected by default to pin 2 of the Arduino and 7 being connected to pin 9.  If you get lost, check the mappings in the Arduino sketch.

  Buttons work as follows:

  Enter - Flip a bit, and toggle it's respective LED.

  Up - Change selected LED. The newly selected led will flash.

  Down - Change selected LED in opposite direction. The newly selected led will flash.

  The first set of LED's are flags to perform actions and change Eep's behavior.  The most important is the SHIFT LED in position 3.  This changes the behavior of the LED's in positions 0, 1, and 2,

  0: Next. Selecting this advances Eep to the next memory address.

  0+Shift: Hi-byte: This selects the upper 8 bits of either address or data

  1: Hi-Nybble: This selects the upper 4 bits of the selected byte.

  1+Shift: Single Step: Execute the data pointed to at the current address and increment.

  2 Address / Data: When this led is on, the address is displayed, when it's off data is.

  2+Shift: Run / Stop: When lit, program runs as fast as possible until a halt instruction or crash.

  3 Shift:  When this LED is lit, the LEDs above change their meaning.

  The second set of LEDs are either data or address.

  The lo/hi byte and lo/hi nybble flags above let you use led's 4, 5, 6, and 7 to manipulate both the 16 bit address space and 16 bit data words. LED 4 is the most significant and LED 7 is the least significant.

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