[Oberon] Other CONST.

[Jörg Straube]

Chris

for embedded (head-less) systems I might agree. If you want to have a decent graphic resolution in color, you‘ll be happy to have more RAM😊

1024x768x2 colors = 96 KB (9% of 1MB)
800x600x16 colors = 234 KB (22% of 1MB)
1024x768x256 colors = 768 KB (75% of 1MB)

Jörg

Am 07.01.2019 um 12:30 schrieb Chris Burrows <chris at cfbsoftware.com>:

>> -----Original Message-----
>> From: Oberon [mailto:oberon-bounces at lists.inf.ethz.ch] On Behalf Of
>> peter at easthope.ca
>> Sent: Monday, 7 January 2019 11:38 AM
>> To: oberon at lists.inf.ethz.ch
>> Subject: [Oberon] Re (2): Other CONST.
>> 
>> Incidentally, during the last year or more, some or much discussion
>> has involved the 1 MB memory of the FPGA machine.  Peter has this
>> remark at the top of risc.c.
>> 
>> // The FPGA uses a 20-bit address bus and thus ignores the top 12
>> bits.
> 
> AFAIK that information is obsolete. The RISC5 address bus width, as defined
> in the Verilog source, was increased from 20 to 24 bits in Sep 2015. I have
> had the 2 MB version of the Pepino Spartan-6 LX25 development board for some
> time now but haven't yet found any use for the additional 1 MB ;-)
> 
> Regards,
> Chris
> 
> Chris Burrows
> CFB Software
> http://www.astrobe.comm/RISC5
> 
> 
> 
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