Astrobe Forum

To help new users get started we have now made available, free of charge, a disk image, Verilog sources and a bitstream file specifically to run the Project Oberon Workstation on the Digilent Nexys A7-100T FPGA trainer board 'out-of-the-box'. This release is based on the Oberon sources (as at March ...

We have successfully implemented Astrobe Embedded Project Oberon on the XC7A100T FPGA device of the Xilinx Artix 7 family. This means that Astrobe can have 480 KBytes of RAM available to it. This is 2-3 times more than our other supported implementations, allowing for more / larger applications to b...

There's also some useful information in Chapter 14 Building and maintenance tools of the Project Oberon book which is accessible from Astrobe for RISC5 > Help > Project Oberon. Note that you only need to rebuild the disk image if you modify and relink the inner core of the Project Oberon OS, which c...

Thank you for your positive feedback. It is very much appreciated.

We haven't released the tools that we use to create the disk image but Andreas Pirklbauer, one of the other guys who has modified the OS has. You can find them at:

https://github.com/andreaspirklbauer/Ob ... ding-tools

An interesting question about the type compatibility rules was recently posted here but was deleted by the user. As it happened it actually highlighted a problem which was subsequently fixed in v7.2 of Astrobe. A good summary of Oberon's type compatibility rules which helps to answer these sorts of ...

There is now a compiler option 'Extension levels' on the Tools > Preference > Compiler tab page. This allows you to change the limit of the number of record extension levels from as little as zero to as many as 8. Be aware that it is a system-wide option. Each additional level incurs an overhead of ...

That error message indicates that microsecond timing is not supported on TIM3 on your target microcontroller. Which microcontroller are you targeting?

You may well 'like' to have different buffer sizes and in theory it may be 'correct' but is it really worth all this effort? How many different buffers are you expecting? What are the minimum and maximum sizes? How many instances of the serial channels would there be? For your example I would simpli...

Here's an example of how to test the trapping of UsageFault errors:

Code: Select all

MODULE TestTraps4;

IMPORT Main, Out, SYSTEM;

VAR
  p: PROCEDURE;
  x: INTEGER;
  
PROCEDURE P1();
BEGIN
  Out.String("ok"); Out.Ln()
END P1;

BEGIN
  P1();
  SYSTEM.PUT(SYSTEM.ADR(p), SYSTEM.ADR(P1) + 1);
  p()
END TestTraps4.

Not by design and you didn't miss anything either. I wasn't aware of this - do you know of any reason why they are disabled by default? The following example code shows one way they could be enabled: CONST NVIC_SHCSR = MCU.NVICBase + 0D24H; VAR x: INTEGER; SYSTEM.GET(NVIC_SHCSR, x); BFI(x, 18, 16, 0...

Astrobe Forum

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Project Oberon Workstation on Digilent Nexys A7-100T

RISC5 Oberon now on the Artix 7-100T

Re: Very impressed with free (!!!) Astrobe for RISC5 FPGA

Re: Very impressed with free (!!!) Astrobe for RISC5 FPGA

Type compatibility rules summary.

Re: Can the limit on the number of record extension levels be increased?

Re: Timers Microseconds

Re: Configuring Buffer Sizes

Re: push {}

Re: push {}