ELECTRONIC ENGINEERING
INTRODUCTION Many years ago, in 1976, MOS Technologies designed the KIM-1 microcomputer system to promote their 6502 CPU. This single-boad computer offered 2KB ROM, 1KB RAM, hex keypad, 7-segment LED display and little I/O (serial and tape interface). Let’s build a modern 6502 based single-boad computer with a more convenient user interface – the KIM-64.… Read more KIM-64
INTRODUCTION The old Power Supply shown in the photo was based on the MC1466 floating regulator IC which has been discontinued in the mid-nineties. A new regulation circuit using two UA723 along with a Switching Power Supply Module have been fitted after the bulky and heavy Transformer had been removed. May this Blog inspire you… Read more DC POWER SUPPLY 0-25V, 0-3A
INTRODUCTION This Digital Multimeter (DMM) is built from off-the-shelf components around an Arduino Nano without the use of a sophisticated front-end ASIC. This blog enables you to build a practical DMM for the everyday use on your bench. But more importantly you’ll get an understanding about the functionality of a DMM, analog to digital conversion,… Read more nanoDMM
ICL7106 (LCD) & ICL7107 (LED) Type: 3 1/2 Digit LCD/LED, Single-Chip A/D ConverterADC Architecture: Dual-Slope Used in Keithley 169, Digital Panel Meters ICL 7129 Type: 4 1/2 Digit LCD, Single-Chip A/D ConverterADC Architecture: Successive IntegrationAKA TC129, TLC7129, TLC829 Used in: METEX M-4650UNI-T UT56, UT57ELV LCD 4500 Panelmeter ICL 7135 Type: 4 1/2 Digit BCD Output,… Read more INTEGRATED CIRCUITS FOR MULTIMETERS
The ispGAL 16Z8 was introduced by Lattice in 1986, one year after introduction of the GAL 16V8. ispGAL, is short for In-System re-Programmable GENERIC ARRAY LOGIC. It is only listed in the 1988 Data Book and was soon replaced by the ispGAL 22V10. The GAL 16V8 is a direct replacement for most 20 pin PALs.… Read more Lattice ispGAL & ispLSI
INTRODUCTION Matured computer hardware (e.g. Arcade PCBs, home computers, etc.) usually don’t have a debug interface, nor do they provide an easy way to alter the firmware. This firmware in form of an integrated circuit in a DIP-package ROM and/or EPROM is fitted on the PCB. This blog introduces a EPROM EMULATOR which can be… Read more EPROM EMULATOR SHIELD FOR ARDUINO MEGA 2560
ABEL™ABEL is a Hardware Description Language (HDL). It features boolean equations, truth tables and state diagrams. An ABEL-HDL design file is the source for the compiler. ACW (Architecture Control Word)Output configurations are controlled by a set of fuses, i.e. programmable ACW cells. The composition of the fuses within the ACW is device specific. Bulk EraseBulk… Read more PLD GLOSSARY
PLD Compiler/CAD Company ABEL (Advanced Boolean Expression Language) DATA I/O, SYNARIO, MINC, XILINX, LATTICE ATGEN ACUGEN SOFTWARE Inc. AMAZE SIGNETICS APEEL ICT (PEEL devices) CUPL (Compiler for Universal Programmable Logic) Assisted Technology, Personal CAD Systems (P-CAD), Logical Devices Inc., Altium IspLEVER (Windows) Lattice ISP Synario System (Windows) Lattice, DATA I/O LOG/iC ISDATA, Kontron OPAL, OPAL… Read more PLD Compilers
1541 Memory Map 1571 Memory Map 1581 Memory Map ‘Boost Your 1571’ Memory Map DOS sector layout HW Bit Timing Byte Ready Sync Pinout Port A VIA1 Data Register Port B VIA1 Data Register Port B VIA2 Data Register Auxiliary Control Register Peripheral Control Register Interrupt Flag Register Interrupt Enable Register Port A CIA Data… Read more Floppy Drive Deep Dive
INTRODUCTION GALmate is a GAL® multi-platform programmer for electronic hobbyists. A simple RxD/TxD UART interface keeps the connection effort to a minimum. This easy-to-build circuit uses industry standard components. HARDWARE FEATURES SOFTWARE FEATURES LET’S GET STARTED The Basics Starting point: I’d like to realize a (simple) logic design using a reconfigurable (programmable) logic device (PLD).Requirements:… Read more GALmate