Debugging the XS Board
- What should the XS40 LED display when it is first turned on?
- My XS Board works on one PC but not another. What to do?
- Why can't I program my XS40 Board?
- Common questions to answer when your XS40 Board won't pass GXSTEST
- Is My XS40 Board Blown Up?
XSV Virtex FPGA Board
- Interfacing to SRAM in the XSV Board
- Using Xilinx Chipscope with the XSV Board
- Using Xilinx Chipscope with XSV 800 through an Xchecker cable
- Xchecker/JTAG interface on XSV800
- Serial port access to the Virtex FPGA on the XSV Board
- A simple rule-of-thumb to prevent permanent disabling of the XSV interface CPLD
- Unable to control upper segments of the XSV Board bargraph LED
- Some test applications for the XSV Board
- Problems reprogramming the XSV Board oscillator frequency
- What Virtex configuration modes are supported by the XSV Board?
- Contention between the CPLD and Virtex FPGA on the XSV Board
- Contention between the CPLD and Virtex FPGA on the XSV Board
- Accessing the TDO signal through the XSV Board Xchecker interface
- XSV Board video decoder chip
Using the serial EEPROM on the XS40 Board
- XS40-005XL serial EEPROM and oscillator programming gremlins
- Explanation of serial EEPROM/FPGA connections on the XS40 Board
- Problem configuring the XS40 from its serial EPROM
- Parallel port dongles can prevent loading of the serial EEPROM on the XS40
- Programming the Atmel EEPROM with an XS40 Board V1.0
- Programming a Xilinx serial EEPROM using the XS40 Board
- Can I program a serial EEPROM with the XS40 Board?
- Which serial EEPROMs are recommended for the XS40 Boards?
- What is the polarity of the XS40 Board serial EEPROM?
- What is the RST/OE polarity of the AT17C256 on the XS40 Board?
- Using larger EEPROMs in an XS40 Board
- Xilinx configuration PROM for the XC4010XL FPGA
- Programming the EEPROM AT17C256 with a SpartanXL
- Programming the Atmel AT17C256 PROM for the Spartan XL family
XS Board power supplies
- What Supply Voltage Should I use?
- Using a 12 VDC power supply with an XS40 Board
- Supply voltages for chips on the XS40 Board
- Power supply specs for the XS Boards
- What power supply is needed for the XS Board?
- XS Board breadboard and power supply manufacturers
- Power-up considerations when connecting external components to the XS Boards
- Fixing damage from reversed-polarity power supply
- VCC connection for the XS40 Board versus the XC4000 chip
- Maximum allowable power supply rating for the XS Board
PC/XS Board communication through the parallel port
- Will disconnecting the parallel port cause problems on the XS40?
- Removing the parallel cable after the XS40 Board is configured
- I need parallel port code samples!
- How do I pass data to and from an XS Board?
- Is there two-way communication between the XS Board and the PC?
- Getting more than 5 bits from the XS Board back to the PC
- Sending data to/from the XS Board through the parallel port
- Sending data from the XS Board to the PC
- Can I use an XS Board with the serial (COM) port?
- What parallel port card is needed to talk to the XS Board?
- How do I debug problems with my parallel port under NT?
- How do I tell if the DriverLINX parallel port driver is active in WinNT?
- Periodic reset of WinNT parallel port
- Scanner causes XS40 Board problem
- Reading FPGA data through PC parallel port status pins
- Can I communicate with the XS Board using standard parallel port protocols?
- Must I use PC parallel port in SPP mode?
- XS Board parallel port problem on NT SP5
- PC - XS40/XS95/XSP Parallel Port Interface
- Using the parallel port control register to strobe the XS40 Board
- Serial communication with the XS Board
- Using the Spartan FPGA Mode pin as an input
Using the Xchecker cable with the XS Boards
- Can we use the Xilinx Xchecker cable with the XS95 Board?
- How do I connect an Xchecker cable to an XS40 Board?
- Can I use the parallel port cable and Xchecker cable simultaneously?
- Problems downloading to the XS95 Board with the Xchecker cable
RAM/uC/FPGA interactions
- How do we use P0 and P2 of the 8031 on the XS Board?
- Questions about the XS40 Board RAM
- How do I get the 8031 on the XS40 to work?
- How do I connect to the 8031 interrupt pins on the XS40 board?
- Sharing RAM between the 8031 uC and the FPGA/CPLD on the XS Boards
- Scrambled address/data pins on the RAM and 8031 of the XS Boards?
- Address bit order for the XS40 Board RAM
- Using pins connected to the RAM/uC as general-purpose FPGA I/O pins
- XS Board RAM manufacturer
- How do I make the 8031 and FPGA work together?
- How do I disable the 8031 microcontroller on the XS Boards?
- Problems with power-up reset of the 8031 on the XS Board
- Disabling the 8031 microcontroller
- 8031 microcontroller reset questions
- How do you read data from the XS Board RAM?
- Dual Port Access?
- How do I access routines in the 8031 internal ROM?
- Problem with uC Port 1.0 on XS95 Board
- Unable to upload RAM of XS-Lite Board
XS Board circuitry
- XS40 powers off automatically?
- XS40 Board Pinout Has Changed?
- What are the differences between XS40-005XL and XS40-010XL Boards?
- Comparison of XS40-010XL+ and XSP-010+ Boards
- Are the XS40-005 and XS40-010 Schematics the Same?
- What are the differences between V1.0 and V1.1 of the XS95 Board?
- Where is the pin layout of the XC4010XL chip?
- What is the speed grade of the XS40 FPGA chip?
- Determining the speed grade of Xilinx devices
- How are the XS Board LED Segments Connected?
- What is the setting for the XS40 Board mode pins?
- VCC/GND connections between XS Board pins and XC4000 FPGA
- Circuitry on XS40 /INIT pin causes programming problems
- Why the resistor network on the XS Board VGA interface?
- Noisy output signals from XS40 Board
- Exact frequencies for the oscillators on XS-40 Boards
- XS Board LED driven by leakage through VGA circuit
- Configuring XS40 Boards using JTAG
- Using an Atmel Flash-programmable 8051 in an XS40 Board
- Problems using pin 16 on an XS40 Board V1.3
XS Board breadboard interface
- Maximizing external I/O pins for the XS Boards
- Limitations on the use of FPGA pins
- Solderless breadboards for the XS Boards
- Interfacing XS40 to the PC ISA bus
- How to get 5V signal from a 3.3V XC4005XL FPGA?
VGA Interface and Image Processing
- Using the VGA port of the XS Board
- Images generated by GIF2HEX are folded
- Hex file format output by GIF2HEX
- Converting GIF files into hex files for the XS Boards
- IPXS v2.1 now available
- Displaying images using IPXS
8031 microcontroller assemblers/compilers
- Where can I get info on the 8031 microcontroller and its ASM51 assembler?
- Getting the 8031 assembler and manual
- Assembler program for the M80C154S microcontroller
- How is the checksum for an ASM51 .HEX file computed?
- HEX file format
- Compilers for the 8031 on the XS Boards
- Why does ASM51 look for files on my floppy A: drive?
- Identifying tags in Intel hex files
- Using a Free 8051 Compiler with the XS Boards
XSLOAD, XSPORT, XSTEST utility programs
- How do you upload the XS Board RAM contents to a file?
- Creating a customized bitstream downloading program
- Some parallel port issues that may make XS boards fail GXSTEST
- Low oscillator frequency causes GXSTEST to fail
- Supporting old and new versions of the XS40 Boards in a lab
- Modifying XSTEST.BAT for other parallel ports
- XSTOOLS_BIN_DIR environment variable not set in Win2000
- I can't download a lone HEX File into an XS40 Board!
- Unable to download a single HEX file to the XS40 Board
- How to get XSTEST for testing the XS Boards
- .BIT and .SVF files for testing the XS40 and XS95 Boards
- How do I install XSTOOLs on a WinNT machine?
- Problems running XSLOAD and XSPORT under Windows NT
- Problems using XSLOAD installed from the XSE CDROM
- Problems using XSLOAD from a ThinkPad laptop
- How to support different types of XC4000 FPGAs in an XS40 Board
- Reverse-engineering XSLOAD
- XSLOAD and XSPORT abort because of a missing .DLL
- How do I download through a different parallel port than LPT1?
- Mapping XSPORT arguments to XS40 Board pins
- XSPORT outputs to the parallel port are incorrect.
- Can I program Spartan FPGAs with XSLOAD?
- Can I download a .JED file to the XS95 Board?
- How do I upload the contents of the XS Board RAM to the PC?
- Error message when uploading XS40 RAM
- Appropriate pins for configuring an FPGA using XSLOAD
- Using old and new versions of XS Boards and XSTOOLs
- XSLOAD/XSPORT for Linux
- XS Board shows "9" during XSTEST
- Are RAM address lines A15 and A16 handled correctly by XSLOAD?
- Using a V1.0 XS40 Board with XSTOOLs V3.0 utilities
XStend Board
- No output from XStend stereo codec
- What is the accuracy of the XStend Board stereo codec?
- AK4520 stereo codec clock frequencies
- Why is the bandwidth of XStend codec only 4kHz?
- DIPSW4 on the XStend Board is not working
- XStend switch connections in error in the manual and schematic?
- How do I debounce the switches on the XStend Board?
- What are the XStend Board voltage and power requirements?
- Are there voltage incompatibilities between the XS40 and XStend Boards?
- What is the resolution of the A/D and D/A of the XStend Board?
- Mapping between XS40 Board pins and XStend Board J3 and J18 buses
- XS Board connections to the XStend Board J3 and J18 buses
- XStend stereo input/output voltage ranges
- XStend V1.2 codec serial data format
- Problems with XStend LED digits and DIP switch
Xilinx Foundation
- How can I create working SVF files?
- Foundation cannot find the Synopsys license file
- Synopsis license problem in Student Edition
- Expiration of Xilinx Foundation 2.1i license
- Error in LOC constraints in the .UCF file caused by readback/reconfig option
- Can I create VHDL testbenches with Xilinx Student Edition 2.1?
- How do I tap into a specific wire in a bus with the XSE 2.1i schematic editor?
- Programming XC4010 FPGAs with the Xilinx Student Edition
- Xilinx Student Edition features and restrictions
- Limitations of Xilinx Student Edition software
- Synopsys license problems.
- How do I upgrade my Foundation 1.3 to version 1.4?
- Incorporating Foundation 1.5i in the Student Edition
- What size of FPGAs/CPLDs are supported by Foundation 1.5?
- VHDL Source Simulator in Foundation?
- Foundation 1.5 doesn't see the connection to the XS Board
- Running the Xilinx Alliance Tools under Linux
- How to use Foundation 1.5 under Linux
- How to run Xilinx tools under Linux
- Access violation in map.exe of Foundation 1.5
- Foundation 1.5 stalls during place & route
- Foundation 1.5 exits with code of 80010104
- Foundation Exit Code 80010104
- How do you convert VHDL to a symbol?
- Intermittent errors when synthesizing FSMs
- Unexpanded 16x4 RAM module error reported by Foundation
- Visualizing a synthesized netlist
- Post-synthesis simulation in Foundation Express
- Is it possible to create VHDL code from a schematic?
- Errors caused by incorrect bus format in the UCF constraints
- Initializing a ROM in VHDL
- What common VHDL warnings mean.
- VHDL WAIT statement won't synthesize
Errata for Practical Xilinx Designer Lab Book and Pragmatic Logic Design
- Difficulties opening PDF files with Acrobat Reader
- Numeric_std VHDL library has disappeared!
- Corrections to the Dwarf microprocessor design
- DWARF VHDL does not work?
XS Board clocks
- Clocking the XS40 Board FPGA and microcontroller
- Why does my XS40 Board have a 36 MHz clock instead of 12 MHz?
- How do I disable the 12 MHz clock on the XS Board?
- 8031 runs at 100 MHz?!
- Applying a clock through the parallel port pins.
Design/example questions
- How do I describe an open-drain, bidirectional I/O pin?
- Processor cores for Xilinx FPGAs?
- Simple stereo codec loopback VHDL code
- How do I mix schematics and VHDL in a design?
- Problem with clearing D flip-flop
- Setting XC4000 FPGA input and output thresholds
- Where can I get a free PCI core?
- Inputing external clocks to the XS Board
- I need specifics for clocking through the parallel port
- Incorrect latch simulation and implementation
- Accessing special Xilinx FPGA features through VHDL
- How do I use the special-purpose pins of the FPGA?
- Using special-purpose XC4010XL FPGA pins
- Connecting to clocks (CLKIOB) in VHDL
- How do I tristate FPGA and CPLD pins?
- What pull-up/pull-down resistor values are used on the XC4000XL devices?
- Problems compiling a 512-location FIFO
- How can I simulate the GNOME microcomputer as it executes an instruction?
- An increment instruction for the DWARF processor
- Driving a keypad and LCD display with the XS Board
- Interfacing 3.3V FPGAs to 5V chips
- IPXS work-arounds for XS40 V1.4 Boards
- MP3 decompression on the XS40 Board?
- Locking bus signals to pins
- Interfacing a MAX114 ADC to the XS Board
- Dividing XS40 V1.2 Clock in Verilog
- XC4062 design only fits in an XCV150 Virtex FPGA
- Verifying XS Board designs
- How do you automatically pack FFs into IOBs?
- Single-stepping state machines
- Free VHDL microcontroller cores
- Making pin assignments for I/O using VHDL
- Looking for VHDL code for a Reed-Solomon encoder/decoder
- Initializing a state machine upon power up
- Assigning pins to I/O in an XS95 design
- Getting RANDGEN to work reliably
- Neural nets in an FPGA
- Incrementing 8051 timer T0 from an external source.
- DSP Algorithms on the XS40 Board?
- How many LUTs for an 8-input, 8-output function?
- Building a RISC System in an FPGA
Miscellaneous
- Where do I get UNIX-like utilities for Windows?
- How do I upgrade an XS40-005XL Board to use an XC4008E FPGA?
- What are the Xilinx Student Edition and lab book ISBN numbers?
- XS Board digital logic lab usage questions
- Why use XS Boards for your logic design labs?
- Setting up a logic design laboratory
- Programming the XS Board with Verilog
- Compatibility of XS Boards with ORCAD
- XS40 pin states during FPGA configuration
- Erasing write-protected designs from the XS95 Board
- Do you have a board for 3.3V CPLDs?
- Using the Atmel AT40K FPGA in the XS40 Board
- Comparison of XC4000 and Spartan FPGAs
- Why are .BIT filesizes different between XC4000E and XC4000XL FPGAs?
- XESS support for Linux?
- Using the XESS Boards under Linux
- Jbits programming for the XS40 Board
- Recommended books for learning XS40 and XS95 Board programming?
- What are some good books for learning VHDL?
- What are good books for learning VHDL?
- Really low-cost XS95 development tools immediately?
- Charges for payment by electronic funds transfer
- Where can I get free literature on ABEL/Verilog?
- What is JTAG?