[Oberon] Smallest Oberon board ever made?

[Magnus Karlsson]

Initial project code release available at 
https://github.com/Saanlima/RISC5Verilog_psram

Magnus

On 1/9/2021 9:59 AM, Magnus Karlsson wrote:
> Thanks!
>
> Monochrome video framebuffer takes 96 KB (1024 x 768 / 8).
> The Artix7-50 has 300 KB of BRAM, of which 128 KB is used for cache, 
> 96 KB used for video memory, 2 KB for boot memory and 74 KB not used 
> at the moment.
> The address of the video framebuffer can be changed via a register so 
> that it can be moved from the default location at the end of the lower 
> 1 MB so above the 8 MB range.
> The IPS6404 is an odd memory. Expressif, the maker of the very popular 
> ESP8266 and ESP32 wireless microcontrollers also makes (or rebrands) 
> this part for use with ESP32.
> https://www.espressif.com/sites/default/files/documentation/esp-psram64_esp-psram64h_datasheet_en.pdf 
>
> https://www.aliexpress.com/i/4000218445956.html
>
> Cheers,
> Magnus
>
> On 1/8/2021 3:49 PM, Pablo Cayuela wrote:
>> Oh!, it's really amazing the level of integration, and even the micro 
>> connectors appear big against the chips.
>> If BRAM is for monochrome video memory, how much is it?
>> The 128 kB caché is part of the 8 MB PSRAM chip (IPS6404) or where it 
>> resides?
>> The IPS6404, is it acquirable? How much is the cost? I read on the 
>> IPUS site "for limited customers only", maybe you're one of them.
>>
>> Congratulations Magnus for such a wonderful board.
>>
>> Best regards,
>> Prof Pablo Cayuela
>> Argentina
>
> -- 
> Oberon at lists.inf.ethz.ch mailing list for ETH Oberon and related systems
> https://lists.inf.ethz.ch/mailman/listinfo/oberon