Search found 419 matches

by cfbsoftware
Thu May 27, 2021 10:06 am
Forum: Astrobe for FPGA RISC5
Topic: Mapping to Nexys4 Cell RAM board
Replies: 3
Views: 4014

Re: Mapping to Nexys4 Cell RAM board

Make sure that you are only using the files supplied for Embedded Project Oberon if you are using the constraints file you attached here. These files must not be mixed with the files supplied for Project Oberon Workstation. The Embedded Project Oberon BootLoader ROM file is called prom.mem. You shou...
by cfbsoftware
Sat May 22, 2021 10:24 am
Forum: Astrobe for FPGA RISC5
Topic: Project Oberon Workstation on Digilent Arty A7-100T
Replies: 0
Views: 3428

Project Oberon Workstation on Digilent Arty A7-100T

To help new users get started we have now made available, free of charge, a disk image, Verilog sources and bitstream file specifically to run the Project Oberon Workstation on the Digilent Arty A7-100T FPGA development board and associated Pmod modules 'out-of-the-box'. This release is based on the...
by cfbsoftware
Fri May 14, 2021 2:12 am
Forum: RISC5
Topic: Stimulus driven interrupts?
Replies: 2
Views: 5147

Re: Stimulus driven interrupts?

For anybody who is interested this discussion was continued on the ETH Oberon Mailing list:

http://lists.inf.ethz.ch/pipermail/oberon/2021/015803.html
by cfbsoftware
Thu May 06, 2021 12:10 am
Forum: RISC5
Topic: Stimulus driven interrupts?
Replies: 2
Views: 5147

Re: Stimulus driven interrupts?

Oberon's interrupt capabilities are part of Project Oberon and the RISC5 design - they are not peculiar to Astrobe. Unfortunately we have not had any experience in what you are attempting to do. However, I recommend that you check out this website produced by gray, another Astrobe user and frequent ...
by cfbsoftware
Wed Apr 28, 2021 11:13 pm
Forum: Getting Started
Topic: License and fair use for Oberon System?
Replies: 2
Views: 4028

Re: License and fair use for Oberon System?

Yes - that is the license that applies to any Project Oberon software, included with Astrobe, that you can also download from http://www.projectoberon.com We supply additional Oberon source code modules with Astrobe that we have developed (e.g. HCFiler, I2C etc). These are subject to additional (but...
by cfbsoftware
Tue Apr 13, 2021 10:20 pm
Forum: Astrobe for FPGA RISC5
Topic: Tools for backing up a Project Oberon SD card image
Replies: 1
Views: 3240

Tools for backing up a Project Oberon SD card image

The tool I use to backup Project Oberon SD card images to my PC using Windows 10 is called DD for Windows: http://www.chrysocome.net/dd The command I use to read 320 MB (the 256MB DOS partition and the 64MB Project Oberon file system) from the SD card is, for example: dd if=\\.\PhysicalDrive6 of=Emb...
by cfbsoftware
Wed Mar 17, 2021 12:37 am
Forum: Astrobe for FPGA RISC5
Topic: What happens to out of range memory addresses?
Replies: 1
Views: 3302

Re: What happens to out of range memory addresses?

Memory addressing limits are defined in Bootload.Mod. For the Artix-7 XC7A35T, using 192KB BRAM, MemLim is defined as 030000H. Read Section 8 Storage layout and management in the Project Oberon documentation (Astrobe menu > Help > Project Oberon) to see how the address range is partitioned and manag...
by cfbsoftware
Mon Mar 15, 2021 8:59 pm
Forum: Astrobe for FPGA RISC5
Topic: RAM port connection
Replies: 1
Views: 3170

Re: RAM port connection

Yes - that is my understanding. Vivado issues the warning: width (24) of port connection 'adr' does not match port width (18) of module 'RAM' If you prefer you can modify the adr parameter in the RAM statement in RISC5Top.v to match the address width actually used in the RAM module for your particul...
by cfbsoftware
Tue Mar 09, 2021 9:24 pm
Forum: Astrobe for FPGA RISC5
Topic: Why are the SPI MISO and SCLK signals shorted together?
Replies: 2
Views: 4060

Re: Why are the SPI MISO and SCLK signals shorted together?

My understanding is that only one SPI device on the RISC5 system is active at any time. In section 17.2.3. The SPI interface for the SD-card (disk) and the Net of the book Project Oberon - The Design of an Operating System, a Compiler, and a Computer. it states: Here, however, no use is made of SPI'...
by cfbsoftware
Wed Mar 03, 2021 11:04 pm
Forum: RISC5
Topic: Measure Temperature and Humidity using Digilent's Pmod HYGRO
Replies: 0
Views: 3924

Measure Temperature and Humidity using Digilent's Pmod HYGRO

The attached source code shows how to measure temperature and humidity via I2C using Digilent's Pmod HYGRO board.

It should work on any of the development boards with I2C that are supported by v7.2 Astrobe for RISC5.