Can anyone translate this from Japanese?

• Can anyone translate this from Japanese?
  Posted by alank2 on 14 Jan, 2018 01:42
• It is I/O port information for a NEC PC-6001...

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• #1 Reply
  Posted by alank2 on 14 Jan, 2018 02:09
• Thank you blueskull!  I appreciate it!
  
  I am surprised it didn't list the 0xD0/0xD1/0xD2 - think they were used for the flopp disk.
• #2 Reply
  Posted by Asuka on 14 Jan, 2018 03:07
• Quote from: blueskull on 14 Jan, 2018 01:51

  Address        Content                                                             Input        Output
  $80, $81      RS232 and control                                                              Yes
  $90              8255 port A, to data bus of sub CPU 8049            Yes
  $91              8255 port B, print data                                                       Yes
  $92              8255 port C, system control (see other table)       Yes           Yes
  $93              8255 control                                                                      Yes
  $A0              PSG, register number set                                                    Yes
  $A1              PSG, register data WR                                                        Yes
  $A2              PSG register data RD                                           Yes
  $A3              PSG inactive                                                                       Yes
  $B0              System control (see other table)                                          Yes
  $C0              Print ready (bit 1)                                                Yes
  

  It says "printer" not "print".
• #3 Reply
  Posted by Asuka on 14 Jan, 2018 03:08
• Quote from: blueskull on 14 Jan, 2018 02:05

  $92, input only for port B:
  Bit 0: printer strobe
  Bit 1: indicates enable
  Bit 2: ROM bank, 1->ROM, 0->CG (character generator?)
  Bit 3: unused
  Bit 4: unused
  Bit 5: to 8049 T0
  Bit 6: to 8049 RD
  Bit 7: to 8049 INT
  
  $B0, all output:
  Bit 0: cursor
  Bit 1: indicates page change
  Bit 2: indicates page change
  Bit 3: relay
  Bit 4: unused
  Bit 5: unused
  Bit 6: unused
  Bit 7: unused
  
  No. 14, PA:
  Bit 0: up
  Bit 1: down
  Bit 2: left
  Bit 3: right
  Bit 4: trigger
  Bit 5:
  Bit 6: unused
  Bit 7: unused
  
  No. 15, PB:
  Bit 6: JS select
  Bit 7: out
  
  Diagram comment: (X-Y) denotes Y pin of JS connector X.
  

  This should be "Change (toggle) displayed page".
  
• #4 Reply
  Posted by alank2 on 14 Jan, 2018 03:35
• Here is the schematic:
  
  https://www.sendspace.com/file/r943d0
  
  I tried to make it searchable and search for IORQ, but the searchable engine didn't find them...
  
  Any idea what PSG is?
• #5 Reply
  Posted by alank2 on 14 Jan, 2018 04:01
• Any idea what the second CPU does?  It says it is an 8049.  It looks like it is connected to the keyboard? or cassette interface?
• #6 Reply
  Posted by alank2 on 14 Jan, 2018 04:07
• Does this shed light:

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• #7 Reply
  Posted by Asuka on 14 Jan, 2018 04:35
• Quote from: blueskull on 14 Jan, 2018 04:25

  Hardware
  
  As one of the big features of PC-6001, some IO are handled by sub CPU. IOs requiring complicated processing such as keyboard, CMT interface, etc. which traditionally don't run on main CPU would need an external hardware to control. From this perspective, the introduction of the sub CPU can be said to be very effective.
  

  One of the special features of the PC-6001's hardware...
  
  

  Quote from: blueskull on 14 Jan, 2018 04:25

  Also, despite there is a main memory (didn't understand this part well, doesn't make sense to me. Maybe as oppose to the sub CPU memory?), there's no spacial changes regarding to the RAM.
  

  Regarding the main memory, there is nothing particularly unusual about the RAM (kawatta tokoro means unusual features, not changes).
  

  Quote

  Thanks to the use of Z80 (RAM) refreshing capability, controller logic is very simple.
  

  I don't know where "thanks to" comes from but that is the basic meaning.
  
  Edit: apparently the forum software changes Japanese characters into question marks so I changed to romanised Japanese. Oddly enough the preview showed them correctly.