Nuts & Volts - September 2006

Elf Turns 30 ------------------------------------------------------------------------------------------------

Parts List continued ...

LOC Supplier

Part No.

Description

VR1

DISP1-6

LED1

LED2

LED3-LED5

OSC1

7805 TIL311

ECS

2100A-035

5.0V Fixed Output TO-220 Regulator
Hexadecimal LED Display
T1 LED (Red)
T1 LED (Green)
T1 LED (Orange)
3.579545 MHz DIP8 Crystal Oscillator
(Digi-Key P/N XC235-ND)

Miscellaneous B1

PB1 S1

Panasonic C&K

CR1225 BH1225 EVQ-PAD05R T101MH9ABE ELF2K-1B

J1

J2

J3

J4

J5

JP1, JP2, JP4, JP5, JP7, JP8

JP6, JP10

Keystone

1560A

Lithium Coin Cell

Coin Cell Holder (Mouser P/N 500K) Push Button Switch (Digi-Key P/N P10890S-ND) SPDT Toggle Switch (Digi-Key P/N CKN1067) PCB ( elf2k.SpareTimeGizmos.com) PCB Mount Phono Jack Coaxial Power Jack (Digi-Key P/N CP-102AH) 24 pin Dual Row Stacking Header (elf2k.Spare TimeGizmos.com) PCB Mount DE9F 20 Pin 0.1” Dual Row Header 2 Pin 0.1” Header and Shorting Plugs 3 Pin 0.1” Header and Shorting Plugs #4-40 Swages, 0.125” x 0.250” (Mouser P/N 534-1560A) Heatsink for VR1 (Digi-Key HS104-1) #4-40 Mounting Hardware for VR1 Machined Pin DIP Sockets for ICs

Switch Panel (Optional) D0-7, RUN, MP Jameco LOAD Jameco INPUT Jameco J5

76523CR 21936CR 28062CR

SPST Toggle Switch

SPDT Toggle Switch

SPDT Push Button Switch

20 Pin 0.1” Dual Row Header

6” 20 Conductor Ribbon Cable w/ IDC Connectors 5 1/2” x 2” x 1/8” ABS Plastic for the Switch Panel 6 3/4” x 1” x 3/8” Acrylic Plastic for the Side Rails Front Panel Decal (from the Elf 2000 Manual)

program, the EPROM also contains three Elf languages: Basic, Forth, and an Editor/Assembler, all written by Mike Riley. A discussion of these languages would take up way more room than we have for this article, and you should read the Elf 2000 User’s Manual to learn more about them.

ElfOS

Finally, although it isn’t part of the EPROM, it’s worth mentioning that Mike Riley has also written an entire disk operating system for the 1802 that runs on the Elf 2000 and other similar hardware. To run it you’ll need the Elf 2000 Disk, UART and RTC expansion card described below, and a mass storage device such as a Compact Flash card. Check out Mike’s web page ( www.elf-emulation.com) for all the details.