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boards:sbc:sbc_v2:sbc_v2-004 [2019/08/10 09:58]
b1ackmai1er [Jumpers]
boards:sbc:sbc_v2:sbc_v2-004 [2020/01/28 06:00] (current)
b1ackmai1er [SBC-V2-004]
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   * Add cpu clock divider to support MSX.   * Add cpu clock divider to support MSX.
   * Default to hard Kontron reset mode.   * Default to hard Kontron reset mode.
 +  * Add User input button on UART Ring Indicator line (for recovery mode in ROMWBW)
  
 Other ideas to be considered: Other ideas to be considered:
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   * RAM access over ECB-BUS.   * RAM access over ECB-BUS.
   * Renumber all parts.   * Renumber all parts.
 +
 +Most recent Kicad files can be found here: https://​github.com/​b1ackmai1er/​SBC-V2-004
  
 Version V: Version V:
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 ====== Resources ====== ====== Resources ======
  
-Version U is experimentalBoards have been ordered for testing 21/6/2019+Version Z includes fix for clock divider pullup and widens power traces. 
 + 
 +{{:​boards:​sbc:​sbc_v2:​sbc_v2-004:​sbc-v2-004z-schematic.pdf|:​boards:​sbc:​sbc_v2:​sbc_v2-004:​sbc-v2-004z-schematic.pdf}} 
 + 
 +Version U.
  
 {{:​boards:​sbc:​sbc_v2:​sbc_v2-004:​sbc-v2-004v-schematic.pdf|:​boards:​sbc:​sbc_v2:​sbc_v2-004:​sbc-v2-004v-schematic.pdf}} {{:​boards:​sbc:​sbc_v2:​sbc_v2-004:​sbc-v2-004v-schematic.pdf|:​boards:​sbc:​sbc_v2:​sbc_v2-004:​sbc-v2-004v-schematic.pdf}}
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 {{:​boards:​sbc:​sbc_v2:​sbc_v2-004:​sbc-v2-004v-kicad5.zip|:​boards:​sbc:​sbc_v2:​sbc_v2-004:​sbc-v2-004v-kicad5.zip}} {{:​boards:​sbc:​sbc_v2:​sbc_v2-004:​sbc-v2-004v-kicad5.zip|:​boards:​sbc:​sbc_v2:​sbc_v2-004:​sbc-v2-004v-kicad5.zip}}
  
-Version Q designs have been manufactured and proven good. Version R corrects the silk screen ​erratta.+Version Q designs have been manufactured and proven good. Version R corrects the silk screen ​errata.
  
 {{:​boards:​sbc:​sbc_v2:​sbc_v2-004:​sbc-v2-004r-gerbers.zip|:​boards:​sbc:​sbc_v2:​sbc_v2-004:​sbc-v2-004r-gerbers.zip}} {{:​boards:​sbc:​sbc_v2:​sbc_v2-004:​sbc-v2-004r-gerbers.zip|:​boards:​sbc:​sbc_v2:​sbc_v2-004:​sbc-v2-004r-gerbers.zip}}
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 {{https://​www.retrobrewcomputers.org/​lib/​plugins/​ckgedit/​fckeditor/​userfiles/​image/​boards/​sbc/​sbc_v2/​sbc_v2-004/​zxturbo-v2.gif?​nolink&​703x390}} {{https://​www.retrobrewcomputers.org/​lib/​plugins/​ckgedit/​fckeditor/​userfiles/​image/​boards/​sbc/​sbc_v2/​sbc_v2-004/​zxturbo-v2.gif?​nolink&​703x390}}
  
-====== Errata ====== 
  
-Silkscreen mixed up for R1 and R2 resulting in reset button failing. R2 should be resistor closest to reset jumper and should be 10K. R1 is resistor closest to reset switch and should be 10R. Lots of silkscreen reverted to Fab layer somehow. Fixed in revision R+====== Errata ======
  
-\\+Version U - Silkscreen mixed up for R1 and R2 resulting in reset button failing. R2 should be resistor closest to reset jumper and should be 10K. R1 is resistor closest to reset switch and should be 10R. Lots of silkscreen reverted to Fab layer somehow. Fixed in revision R
  
 +Version V - CPU oscillator may not work due to incorrectly placed pull up resistor. A 1k resistor needs to be added between pin 12 and pin 14 of U26 74LS06.
  
  
boards/sbc/sbc_v2/sbc_v2-004.1565445510.txt.gz · Last modified: 2019/08/10 09:58 by b1ackmai1er
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