In article ,   
   Waldek Hebisch  wrote:   
   >albert@spenarnc.xs4all.nl wrote:   
   >> In article ,   
   >> Waldek Hebisch  wrote:   
   >>    
   >>>   
   >>>BTW: Chip datasheet talks about ports and pin numbers within   
   >>>ports, Milkv Duo picture uses pin numbers but there is mixup   
   >>>with ports.  There is command line outility to deal with pins,   
   >>>it uses different numbering similar to numbering on the board   
   >>>but not the same.  Linux uses still different ping numbering.   
   >>>Above I use pin number withing port + 32*port number where   
   >>>ports are numbered from 0.   
   >>   
   >> That is a sensible convention, I use the same.   
   >> In my riscv board the output are marked i.e. GD13 that   
   >> has assigned the Forth io number (^D-1)*0x20 +13 .   
   >> That gets 0x6D .   
   >   
   >64 MB Milkv Duo board has marking like GP0, GP1, etc.  As I wrote   
   >this does not agree with most other sources.  I think 256 MB   
   >version has "the same" marking, but probably slightly different   
   >correspondence with ports and lines withing ports.  Milkv   
   >Duo S has different connectors and no marking on the board.   
   >Each has different chip, 64 MB is CV1800B (68 pin QFP, 1 GHz Risc-V +   
   >700MHz Risc-V + 8051), 256 MB is SG2002 (88 pin QFP, 1GHz Arm +   
   >1 GHz Risc-V + 700MHz Risc-V + 8051), Duo-S had 512 MB RAM and   
   >uses SG2000 (205 pin BGA, 1GHz Arm + 1 GHz Risc-V + 700MHz Risc-V +   
   >8051).  On 64 MB duo there are some pins that apparently can be   
   >connected to two different ports, reference via "canonical" label   
   >of a pin would exclude such thing.   
      
   Well. The DongshanNezhaSTU has a 9 page schematic and the 260 pin DDR4   
   external finger connector has a legenda like PG4 and PD17 that refer   
   directly to the Soc description.   
   I suggest getting this documentation from the manufacturer, because   
   it is essential to using the board.   
      
   >   
   >--   
   >                              Waldek Hebisch   
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