GPIO.kicad_sch

(kicad_sch (version 20230121) (generator eeschema)

  (uuid 65d539b7-89ca-40e3-ad53-8650897b4178)

  (paper "A4")

  (title_block
    (title "CEDA - Sanco 8003 schematics")
    (rev "05")
    (company "Logic Systems Int'l Inc")
    (comment 1 "reversed by RetrOfficina - retrofficina.glgprograms.it")
    (comment 2 "control and for parallel port")
    (comment 3 "The uPD8255 PIO is used for multiple purposes, including bank switching, peripheral")
    (comment 4 "GPIO")
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  (wire (pts (xy 73.66 86.36) (xy 92.71 86.36))
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  (wire (pts (xy 73.66 191.77) (xy 69.85 191.77))
    (stroke (width 0) (type default))
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  (wire (pts (xy 241.3 53.34) (xy 241.3 30.48))
    (stroke (width 0) (type default))
    (uuid c4bd64aa-e610-4fbb-a638-9cac2deea924)
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  (wire (pts (xy 259.08 53.34) (xy 241.3 53.34))
    (stroke (width 0) (type default))
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  (wire (pts (xy 161.29 101.6) (xy 161.29 100.33))
    (stroke (width 0) (type default))
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  (wire (pts (xy 142.24 127) (xy 142.24 95.25))
    (stroke (width 0) (type default))
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  (wire (pts (xy 233.68 45.72) (xy 233.68 30.48))
    (stroke (width 0) (type default))
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  (wire (pts (xy 142.24 127) (xy 190.5 127))
    (stroke (width 0) (type default))
    (uuid d089b48c-b66a-4f35-884f-f78aaa4c24ef)
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  (wire (pts (xy 88.9 189.23) (xy 92.71 189.23))
    (stroke (width 0) (type default))
    (uuid d3e84e3c-886a-4365-9021-d8289ffcd1ed)
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  (wire (pts (xy 259.08 48.26) (xy 236.22 48.26))
    (stroke (width 0) (type default))
    (uuid d641ee09-999b-44c5-8d7b-439cc6608278)
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  (wire (pts (xy 88.9 161.29) (xy 92.71 161.29))
    (stroke (width 0) (type default))
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    (stroke (width 0) (type default))
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  (wire (pts (xy 73.66 59.69) (xy 92.71 59.69))
    (stroke (width 0) (type default))
    (uuid da352f89-3d65-4b8e-8221-5111577babba)
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  (bus (pts (xy 34.29 55.88) (xy 36.83 55.88))
    (stroke (width 0) (type default))
    (uuid dd2a23d6-24ad-473c-a37f-60ae82c245e2)
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  (wire (pts (xy 184.15 48.26) (xy 189.23 48.26))
    (stroke (width 0) (type default))
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  (wire (pts (xy 184.15 35.56) (xy 189.23 35.56))
    (stroke (width 0) (type default))
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  (wire (pts (xy 238.76 50.8) (xy 214.63 50.8))
    (stroke (width 0) (type default))
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  (wire (pts (xy 238.76 50.8) (xy 238.76 30.48))
    (stroke (width 0) (type default))
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  (wire (pts (xy 73.66 73.66) (xy 93.98 73.66))
    (stroke (width 0) (type default))
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  (wire (pts (xy 190.5 151.13) (xy 180.34 151.13))
    (stroke (width 0) (type default))
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  (wire (pts (xy 170.18 90.17) (xy 168.91 90.17))
    (stroke (width 0) (type default))
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  (wire (pts (xy 215.9 127) (xy 215.9 123.19))
    (stroke (width 0) (type default))
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    (stroke (width 0) (type default))
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  (wire (pts (xy 45.72 43.18) (xy 39.37 43.18))
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  (wire (pts (xy 116.84 170.18) (xy 118.11 170.18))
    (stroke (width 0) (type default))
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  (wire (pts (xy 215.9 138.43) (xy 215.9 140.97))
    (stroke (width 0) (type default))
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  (wire (pts (xy 161.29 81.28) (xy 161.29 85.09))
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    (stroke (width 0) (type default))
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  (bus (pts (xy 36.83 55.88) (xy 36.83 57.15))
    (stroke (width 0) (type default))
    (uuid fa57dfd0-ff1e-4ff9-88b5-2d72c23a06b9)
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  (wire (pts (xy 158.75 116.84) (xy 158.75 118.11))
    (stroke (width 0) (type default))
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    (stroke (width 0) (type default))
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  (wire (pts (xy 172.72 92.71) (xy 172.72 95.25))
    (stroke (width 0) (type default))
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  (text "Printer_x are signals from the DMUTE_FRAME_SYNC5 PRT connector.\nSome of them (18-24) may be used for a bidirectional\nparallel communication. Bus direction can be changed\nwith PAR_DIR = GPIO B5.\nOther remarkable PRINTER pins:\n- Pins 2,4,5,9 are readable from GPIO port C;\n- Pin 3 is writable from GPIO, with inverted logic;\n- Pin 16 and 17 forms a sort of syncronization network\nbetween PRT port and CEDA."
    (at 114.3 50.8 0)
    (effects (font (size 1.27 1.27)) (justify left bottom))
    (uuid 12273647-360e-42e6-ad0b-0bde9c0b605a)
  )
  (text "This is PERROR from parity latch" (at 54.61 163.83 0)
    (effects (font (size 1.27 1.27)) (justify right bottom))
    (uuid 1b3ce459-37e4-4632-9ab3-d404d0775560)
  )
  (text "This may be a mask to mute FRAME_SYNC" (at 54.61 186.69 0)
    (effects (font (size 1.27 1.27)) (justify right bottom))
    (uuid 6c59f862-6045-41d8-ad36-68d40aba3f35)
  )
  (text "TODO" (at 110.49 63.5 0)
    (effects (font (size 1.27 1.27)) (justify left bottom))
    (uuid 7d7b91ed-f60e-49dc-981b-07ff982ab9a9)
  )
  (text "TODO" (at 93.98 67.31 0)
    (effects (font (size 1.27 1.27)) (justify left bottom))
    (uuid 88fce1e6-1ee7-4155-a2d1-ac00e673bfc6)
  )
  (text "This is FDC_INT from Floppy Controller" (at 54.61 177.8 0)
    (effects (font (size 1.27 1.27)) (justify right bottom))
    (uuid 8e0be1b1-09e9-4f97-a8b0-b1e9b8de69f9)
  )
  (text "Some notable events from IO peripherals can be read back\nfrom input port B. Furthermore, these events may trigger\nthe CTC counter 3. The ability to trigger CTC counter\nis maskable for each event."
    (at 17.78 148.59 0)
    (effects (font (size 1.27 1.27)) (justify left bottom))
    (uuid 94531b35-56c1-4546-9562-10c96639e84f)
  )
  (text "This is a FRAME_SYNC signal from CRTC" (at 54.61 191.77 0)
    (effects (font (size 1.27 1.27)) (justify right bottom))
    (uuid ae8befb0-d14e-4d00-ba90-94d739d4dd46)
  )
  (text "This may be a mask to mute FDC_INT" (at 54.61 172.72 0)
    (effects (font (size 1.27 1.27)) (justify right bottom))
    (uuid c1e8ae05-9814-4685-a52d-0d380235458e)
  )
  (text "Hardware maskable events" (at 17.78 138.43 0)
    (effects (font (size 3 3) (thickness 1) bold) (justify left bottom))
    (uuid c680e697-0864-4608-91da-cd235a8fed55)
  )
  (text "Bank switching" (at 17.78 110.49 0)
    (effects (font (size 3 3) (thickness 1) bold) (justify left bottom))
    (uuid c97e3ab0-d117-4205-bd87-dfa102aeacbb)
  )
  (text "uPD8255 manages the bank switching system through GPIO B0\nand B7. Former (BS_RAMEN) enables 64k DRAM on whole addressing\nspace. Latter (BS_ATTREN) switchs between character and attribute\nvideo RAM.\nSee Main Memory Management and Video Memory Management\nsheets for more informations."
    (at 17.78 124.46 0)
    (effects (font (size 1.27 1.27)) (justify left bottom))
    (uuid ca30e851-b715-4240-a006-3703f24d7bad)
  )
  (text "This may be a mask to mute PERROR" (at 54.61 158.75 0)
    (effects (font (size 1.27 1.27)) (justify right bottom))
    (uuid e82fd816-ee83-43de-8c9f-7cdcc1c2c9d6)
  )
  (text "Printer port" (at 114.3 30.48 0)
    (effects (font (size 3 3) (thickness 1) bold) (justify left bottom))
    (uuid f3660197-1714-4fbd-bb6f-495f0c201891)
  )

  (label "PA7" (at 184.15 38.1 0) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify left bottom))
    (uuid 00394234-1513-424e-ab97-bffa31457c79)
  )
  (label "PAR_?" (at 180.34 151.13 0) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify left bottom))
    (uuid 0148c9d4-7d53-43f0-8f81-3d5708ad83aa)
  )
  (label "PA5" (at 184.15 48.26 0) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify left bottom))
    (uuid 03733e6e-51f9-4d41-8109-38a8a87bf0a8)
  )
  (label "PRINTER_4" (at 92.71 88.9 180) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify right bottom))
    (uuid 13422a8f-34f4-49c8-8184-83a12cbf55ce)
  )
  (label "PA4" (at 184.15 50.8 0) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify left bottom))
    (uuid 24cf17ff-1b89-4f17-8674-31fce0ca452f)
  )
  (label "PAR_?" (at 92.71 67.31 180) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify right bottom))
    (uuid 2646c060-c289-4cab-b962-ff539241d38f)
  )
  (label "MUTE_FDC_INT" (at 92.71 59.69 180) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify right bottom))
    (uuid 2da8c53a-4a09-4146-bb89-48e3068e1e14)
  )
  (label "PA5" (at 92.71 43.18 180) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify right bottom))
    (uuid 32e59b44-e35c-4041-b6db-afac048d8b57)
  )
  (label "C7" (at 92.71 91.44 180) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify right bottom))
    (uuid 3427cada-a78b-4fbb-9b6a-10bf248533fc)
  )
  (label "PRINTER_17" (at 237.49 92.71 180) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify right bottom))
    (uuid 35cbe65e-14db-46e5-84cf-723703f7a80d)
  )
  (label "PRINTER_24" (at 259.08 40.64 180) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify right bottom))
    (uuid 372a3157-1c00-461a-afda-dc88bd76262e)
  )
  (label "PA1" (at 92.71 33.02 180) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify right bottom))
    (uuid 37684d5f-ccf0-415f-aa6b-a4699d16d6e8)
  )
  (label "D5" (at 40.64 48.26 0) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify left bottom))
    (uuid 37869947-1247-4a5a-a0f4-a0a6109380f2)
  )
  (label "D3" (at 40.64 43.18 0) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify left bottom))
    (uuid 3e90d439-0958-4be6-857a-1e3ed40ccabb)
  )
  (label "PA3" (at 92.71 38.1 180) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify right bottom))
    (uuid 3fbfa006-a1f0-4631-a95d-19feddc879d2)
  )
  (label "PA0" (at 184.15 35.56 0) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify left bottom))
    (uuid 409631a9-f43e-4e70-9955-90627b968635)
  )
  (label "PRINTER_2" (at 92.71 86.36 180) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify right bottom))
    (uuid 4398eaf3-6be3-470b-933f-4e2c1a68b7bb)
  )
  (label "PA7" (at 92.71 48.26 180) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify right bottom))
    (uuid 49107a5f-456a-41ce-8a98-521a1e3a5b5b)
  )
  (label "PRINTER_2" (at 267.97 109.22 0) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify left bottom))
    (uuid 4a39f872-724d-4bd7-a4b2-e85696c09d6a)
  )
  (label "PRINTER_9" (at 267.97 127 0) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify left bottom))
    (uuid 4b55c512-421b-4396-bbfe-886f3be53657)
  )
  (label "PRINTER_3" (at 237.49 151.13 180) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify right bottom))
    (uuid 4e8ae712-04ed-4583-b9a8-caf3ff2e0369)
  )
  (label "D6" (at 40.64 50.8 0) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify left bottom))
    (uuid 4f3240ec-c692-40c1-89be-4cf2aef9ba13)
  )
  (label "PRINTER_16" (at 237.49 127 180) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify right bottom))
    (uuid 5dc93c43-d1bf-4997-a3e7-a612de3dd268)
  )
  (label "PA2" (at 92.71 35.56 180) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify right bottom))
    (uuid 636f60eb-cd92-401c-9459-3cfb16b90a71)
  )
  (label "PA1" (at 184.15 40.64 0) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify left bottom))
    (uuid 6496d6cc-9dd8-4ec9-bcab-102c2df30047)
  )
  (label "PRINTER_5" (at 267.97 118.11 0) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify left bottom))
    (uuid 64a24221-7b86-4b95-a1d7-77e4890ae4cb)
  )
  (label "PA2" (at 184.15 45.72 0) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify left bottom))
    (uuid 6a8d0255-0372-4308-bbd1-83835210ac4f)
  )
  (label "PA0" (at 92.71 30.48 180) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify right bottom))
    (uuid 6c3de07e-153e-4192-83d8-f87d932e81d7)
  )
  (label "PRINTER_19" (at 259.08 43.18 180) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify right bottom))
    (uuid 7162548e-ffab-45d2-8683-78319fd71532)
  )
  (label "PA4" (at 92.71 40.64 180) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify right bottom))
    (uuid 71957eb6-9f3d-414f-9a02-456cc248e256)
  )
  (label "PRINTER_25" (at 259.08 35.56 180) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify right bottom))
    (uuid 7f1137ff-220a-4318-9997-41d780d65ef4)
  )
  (label "PRINTER_21" (at 259.08 50.8 180) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify right bottom))
    (uuid 81f010e1-53f1-46ec-9dd5-7a3dda26f5ee)
  )
  (label "PRINTER_23" (at 259.08 45.72 180) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify right bottom))
    (uuid 86c5145c-1174-4f49-bab5-f7e515783938)
  )
  (label "D1" (at 40.64 38.1 0) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify left bottom))
    (uuid 8823a6b1-0990-42bc-91f5-2550e92eef2e)
  )
  (label "PAR_DIR" (at 222.25 58.42 180) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify right bottom))
    (uuid 9306ded4-0e80-45dd-9896-909f45f434c0)
  )
  (label "MUTE_FRAME_SYNC" (at 92.71 57.15 180) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify right bottom))
    (uuid 979cd172-6368-480a-83ff-99893c36d3c5)
  )
  (label "C7" (at 184.15 90.17 0) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify left bottom))
    (uuid 98ceaf7b-e8c3-4923-be72-9c969d047ba7)
  )
  (label "PA6" (at 92.71 45.72 180) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify right bottom))
    (uuid a11591cc-7966-4176-997e-a90fbde4f57c)
  )
  (label "D0" (at 40.64 35.56 0) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify left bottom))
    (uuid a7307051-7808-45b6-9357-212ee1b1e9b1)
  )
  (label "PRINTER_5" (at 92.71 83.82 180) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify right bottom))
    (uuid aaadb19b-387b-4584-8cf2-6902ac2d29e5)
  )
  (label "PRINTER_18" (at 259.08 38.1 180) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify right bottom))
    (uuid ac9e3052-29a4-47ea-b1c8-8016e5c83ad2)
  )
  (label "PAR_DIR" (at 92.71 64.77 180) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify right bottom))
    (uuid b0658002-c867-4f29-890f-1cc72496856f)
  )
  (label "D4" (at 40.64 45.72 0) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify left bottom))
    (uuid b60dc472-6e92-4851-af3d-ec29345bbf56)
  )
  (label "D7" (at 40.64 53.34 0) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify left bottom))
    (uuid ba22801e-0ba1-4a5a-88a3-b72878b97b41)
  )
  (label "MUTE_FDC_INT" (at 55.88 172.72 0) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify left bottom))
    (uuid bd1b1ea8-847f-491c-95ce-7a6d62e80d3a)
  )
  (label "PA6" (at 184.15 43.18 0) (fields_autoplaced)
    (effects (font (size 1.27 1.27)) (justify left bottom))
    (uuid bde9f20c-c365-4e8f-bbcf-31fc45df1253)
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