GP8B-V5.1

This is a stable release.

• GLOBAL

  • Small cleaning

• DOCUMENTS

  • Reverse changelog order (new version will be on the first line)

• SCHEMATICS

  • Better/More decoupling capacitor
  • Replacing old symbol for IC1 (CPLD)
  • Fixing the SPI 4bits only issue
  • ADDSCR_CLK was not sending the right pulses to the motherboard, this is due to
    old version without any standard in mind.

• PCB

  • J1 wasn't a male connector

• SCHEMATICS FEATURES

  • Now if the argument is not SRCVALUE, the processor will not go to the next address (1 byte in memory saved)
    on big program this improvement is not negligible.

GP8B-V5.0

This is a more public friendly update.

GP8B V5.0 :

• GLOBAL

  • Switching "CERN-OHL v1.2" license to "CERN-OHLw v2 or later"

• DOCUMENTS

  • Adding the GP8B datasheet
  • Adding waveforms
  • Adding the CHANGELOG file
  • Cleaning

• SCHEMATICS

  • Small symbols changes
  • Removing old symbols
  • Adding TPS7A0518PDBZR symbol
  • Adding SN74LVC8T245DW symbol
  • Adding SN74AVC4T245D symbol
  • Set version to 5.0
  • Replacing all used 74x1Gxx symbols
    (shared power pin fix, and visual)
    (same for CD74AC238)

• PCB

  • Removing old footprints
  • Set version to 5.0
  • Adding QRCode with the Github link
  • Fixing 3D

• SCHEMATICS FEATURES

  • Replacing the old XC95288XL-10TQ144 by XC2C256-VQ100
    XC95288XL is a obsolete CPLD and is now replaced with
    a CoolRunnerII familly CPLD.
    the XC2C256-VQ100 is more hand-solder friendly too.

  • Adding the regulator TPS7A0518PDBZR for 1.8V (CPLD)

  • Adding VREF (3.3V) to the JTAG connector

  • Removing some unused pins and shrink the connector (J4) down

  • Adding a new connector for all the ALU pins (J5)

  • All capacitor for the CPLD is now 100nF

  • Adding SN74LVC8T245DW and SN74AVC4T245D to translate logic level for the CPLD

  • Renamed some connectors

  • SPI : now data come from the 8bits D-latch register (was directly controlled by the number bus)

  • Mounting holes is now on schematics

  • Renaming "OPC_CLK" to "OPCHOOSE_CLK"

  • Renaming "BCSPI_CLK" to "BCFG_SPI_CLK"

  • Renaming "Connecteur" sheet to "Connector" and "Connector.sch" to "fileConnector.sch"

  • Renaming "Registre" sheet to "Register" and "fileRegistre.sch" to "fileRegister.sch"

  • Renaming "Ram.sch" to "fileRAM.sch"

  • Renaming "SPI.sch" to "fileSPI.sch"

  • Apply the MM1 memory standard (3.3V I/O changes)

GP8B-V4.0

GP8B V4.0 :
- Intial release