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
Category: Programmable Logic
EPROM EMULATOR SHIELD FOR ARDUINO MEGA 2560
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
PLD GLOSSARY
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 Compilers
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
GALmate
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
GAL hints & more
PITFALLS I/O features: an actual device may or may not have internal pull-ups (ca. 50-100kΩ) or bus-keeper (ATF devices only) Don‘t rely on device marking solely; check for presence/absence of I/O features by using the GALmate read function Clamping: pin voltages >7V may trigger erratic device behavior due to transition into Edit mode or Register… Read more GAL hints & more
GAL specific information
Introduction This information is related to the programming mode of the PLDs listed below. Find more details in the Download section. GAL pinouts for EDIT mode GAL16V8/ATF16V8 GAL20V8/ATF20V8 GAL22V10/ATF22V10 GAL20XV10 GAL20RA10 GAL18V10 GAL26V12C GAL26CV12 GAL6001 GAL6002 GAL/ATF Architecture 16V8 & 20V8 detailed ACW bit information 16V8, 20V8 & 22V10 Row Addresses Map Block Diagram Download… Read more GAL specific information
C64 Track Display 1541, 1571
INTRODUCTION When working with a 15X1 floppy drive, it comes in quite handy to know the track, the drive is currently accessing. This blog presents a kind of drive-modding for 15X1 afficionados. FEATURES SINGLE IC GAL22V10 SOLUTION 2 DIGITS LATCHED BCD INTERFACE (0 TO 79) LET’S GET STARTED Circuit Description The State Machine in this… Read more C64 Track Display 1541, 1571
Generating sine waves with a GAL
INTRODUCTION This is a simple approach using a GAL and an ADC to generate a sine wave. A simple State Machine is looping though 47 different states and outputting data words accordingly. In order to avoid unpredictable output sequences all states have to be unique. The requirement that each state has to be unique limits… Read more Generating sine waves with a GAL
GALmate hardware
HARDWARE OVERVIEW UART interface, 2x DCDC, ATmega16 Microcontroller, 2x PWM DAC, regulator LM723, OpAmp LM324, inverter CD4069 Supported devices Lattice, National, ST:GAL16V8, GAL18V10, GAL20V8, GAL20XV10, GAL20RA10, GAL22V10, GAL6001 (GAL39V18), GAL6002GAL26V12 & GAL26CV12 by using a simple 28-pin to 24-pin adapter Atmel:ATF16V8, ATF20V8, ATF22V10 FEATURES No parallel port and driver trouble Power over USB Programms all… Read more GALmate hardware