[Oberon] Typo in documentation?

[Jörg Straube]

Hi

Chapter 16 describes the instruction set of the RISC5 processor.
I read the following description of the opcodes:

10 MUL a, b, n    R.a := R.a x n
14 FML a, b, c    R.a := R.a x R.c

When reading the Verilog code of RISC5.v I think there is a typo in chapter 16. Shouldn't the opcodes be defined as follows?

10 MUL a, b, n    R.a := R.b x n
14 FML a, b, c    R.a := R.b x R.c

Who will ask Niklaus Wirth?

br, Jörg

> Am 16.05.2015 um 06:18 schrieb Jörg Straube <joerg.straube at iaeth.ch>:
> 
> The limitation is within the Oberon system. Module Display and the Verilig code VID would have to be changed. And the heap and stack limits to be adjusted.
> 
> Jörg
> 
>> Am 16.05.2015 um 02:44 schrieb Douglas G. Danforth <danforth at greenwoodfarm.com>:
>> 
>> Naive question.
>> Is color display supported by such boards?
>> Or is it within the Oberon system that limits the display to b/w?
>> -Doug Danforth
>> 
>>> On 5/15/2015 4:18 PM, Chris Burrows wrote:
>>> The Saanlima RISC FPGA Oberon development system I was referring to uses a
>>> *Spartan-6* and has up to 2MB of SRAM. Project Oberon 2013 has *already*
>>> been ported to it.
>>> 
>>> Currently it is a two-board system - a general purpose FPGA board with an
>>> add-on board ('wing') for Oberon's keyboard, mouse and SRAM.
>>> 
>>> http://www.saanlima.com/store/
>>> 
>>> The proposal currently up for discussion is to suggest requirements for a
>>> simpler single-board system.
>>> 
>>> Chris
>>> 
>>>> -----Original Message-----
>>>> From: Frans-Pieter Vonck [mailto:fp at vonck.nl]
>>>> Sent: Saturday, 16 May 2015 1:57 AM
>>>> To: ETH Oberon and related systems
>>>> Subject: Re: [Oberon] Oberon-specific Spartan-6 FPGA board
>>>> 
>>>> I think that the spartan-3 family with sram is no longer produced.
>>>> I found this company microsemi that seems to have a low level fpga
>>>> that supports sram, the igloo2
>>>> 
>>>> http://www.microsemi.com/products/fpga-soc/fpga/igloo2-fpga
>>>> 
>>>> Greets,
>>>> F.P.
>>>> 
>>>>> Chris
>>>>> 
>>>>> Agree. SRAM is important. HDMI could be optional if we are able to
>>>>> take a cheaper FPGA (because of reduced speed requirements --> VGA:
>>>> 75 MHz, HDMI:
>>>>> 750 MHz)
>>>>> 
>>>>> Some free pins, being able to add Ethernet later on, e.g. the
>>>> WIZnet
>>>>> WIZ550io (W5500)
>>>>> 
>>>>> br
>>>>> Jörg
>>>>> 
>>>>> -----Original Message-----
>>>>> From: Chris Burrows [mailto:chris at cfbsoftware.com]
>>>>> Sent: Freitag, 15. Mai 2015 15:47
>>>>> To: ETH Oberon and related systems
>>>>> Subject: [Oberon] Oberon-specific Spartan-6 FPGA board
>>>>> 
>>>>> Magnus Karlsson (the guy from Saanlima electronics who designed the
>>>>> Pipistrello + Oberon Wing (2MB of SRAM) Spartan-6 Oberon developmnt
>>>>> board) is asking for feedback on a proposed Oberon-specific
>>>> Spartan-6
>>>>> FPGA board as
>>>>> follows:
>>>>> 
>>>>> -------------------------------------------------------------------
>>>> ---
>>>>> --
>>>>> Oberon-specific FPGA board:
>>>>> 
>>>>> The Pipistrello is way overkill for this, it would be much cheaper
>>>> to
>>>>> make a new board with all the features needed but not more. This
>>>> would
>>>>> be straight-forward to do but it would be nice to have a list of
>>>>> things on this board and not just copy the featues of the Digilent
>>>>> Spartan-3 board.
>>>>> 
>>>>> I was thinking the following connectors on the back: KBD, Mouse,
>>>> HDMI,
>>>>> VGA, USB, Power And the following on the front: Power on/off
>>>> switch,
>>>>> power LED, full-size SD card, 8 LED, 8 dip-switches.
>>>>> 
>>>>> -------------------------------------------------------------------
>>>> ---
>>>>> --
>>>>> 
>>>>> If you have any suggestions you can reply to his message on the
>>>>> Saanlima
>>>>> forum:
>>>>> 
>>>>> http://saanlima.com/forum/viewtopic.php?f=4&t=1246&start=10#p1488
>>>>> 
>>>>> Regards,
>>>>> Chris
>>>>> 
>>>>> Chris Burrows
>>>>> CFB Software
>>>>> http://www.cfbsoftware.com
>>>>> 
>>>>> 
>>>>> 
>>>>> 
>>>>> 
>>>>> 
>>>>> --
>>>>> Oberon at lists.inf.ethz.ch mailing list for ETH Oberon and related
>>>>> systems https://lists.inf.ethz.ch/mailman/listinfo/oberon
>>>>> --
>>>>> Oberon at lists.inf.ethz.ch mailing list for ETH Oberon and related
>>>>> systems https://lists.inf.ethz.ch/mailman/listinfo/oberon
>>>> 
>>>> 
>>>> --
>>>> Oberon at lists.inf.ethz.ch mailing list for ETH Oberon and related
>>>> systems https://lists.inf.ethz.ch/mailman/listinfo/oberon
>>> 
>>> --
>>> Oberon at lists.inf.ethz.ch mailing list for ETH Oberon and related systems
>>> https://lists.inf.ethz.ch/mailman/listinfo/oberon
>> 
>> 
>> --
>> Oberon at lists.inf.ethz.ch mailing list for ETH Oberon and related systems
>> https://lists.inf.ethz.ch/mailman/listinfo/oberon
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