Merge pull request #10 from tjboldt/data-bus-fix

Data bus fix
2024-12-22 12:29:59 +00:00 · 2022-03-19 10:30:26 -04:00 · 2022-03-19 10:30:26 -04:00 · 6f684105b5
commit 6f684105b5
parent 6b9257044d 7a48901bf2
32 changed files with 135910 additions and 42510 deletions
--- a/.gitignore
+++ b/.gitignore
@ -1,3 +1,4 @@
 *-bak
 *.o
 *.DS_Store
+*-backups 
--- a/Hardware/ProDOS
+++ b/Hardware/ProDOS
--- a/Hardware/ProDOS
+++ b/Hardware/ProDOS
--- a/Hardware/ProDOS
+++ b/Hardware/ProDOS
--- a/Hardware/ProDOS
+++ b/Hardware/ProDOS
--- a/Hardware/ProDOS
+++ b/Hardware/ProDOS
@ -1,13 +0,0 @@
-M48
-; DRILL file {KiCad (5.1.10-1-10_14)} date Sunday, December 12, 2021 at 10:22:21 AM
-; FORMAT={-:-/ absolute / inch / decimal}
-; #@! TF.CreationDate,2021-12-12T10:22:21-05:00
-; #@! TF.GenerationSoftware,Kicad,Pcbnew,(5.1.10-1-10_14)
-; #@! TF.FileFunction,NonPlated,1,2,NPTH
-FMAT,2
-INCH
-%
-G90
-G05
-T0
-M30
--- a/Hardware/ProDOS
+++ b/Hardware/ProDOS
--- a/Hardware/ProDOS
+++ b/Hardware/ProDOS
@ -1,684 +0,0 @@
-(export (version D)
-  (design
-    (source "/Users/terence/source/ProDOS-ROM-Drive/Hardware/ProDOS ROM-Drive 3.0.sch")
-    (date "Wednesday, December 08, 2021 at 10:18:30 pm")
-    (tool "Eeschema (5.1.10-1-10_14)")
-    (sheet (number 1) (name /) (tstamps /)
-      (title_block
-        (title "ProDOS ROM-Drive")
-        (company)
-        (rev 3.0)
-        (date 2021-12-07)
-        (source "ProDOS ROM-Drive 3.0.sch")
-        (comment (number 1) (value ""))
-        (comment (number 2) (value ""))
-        (comment (number 3) (value ""))
-        (comment (number 4) (value "")))))
-  (components
-    (comp (ref J1)
-      (value "Apple II Expansion Slot")
-      (footprint "Connector:Apple II Expansion Edge Connector")
-      (datasheet ~)
-      (libsource (lib Connector_Generic) (part Conn_02x25_Counter_Clockwise) (description "Generic connector, double row, 02x25, counter clockwise pin numbering scheme (similar to DIP packge numbering), script generated (kicad-library-utils/schlib/autogen/connector/)"))
-      (sheetpath (names /) (tstamps /))
-      (tstamp 5C72A915))
-    (comp (ref U1)
-      (value 74LS00)
-      (footprint Package_DIP:DIP-14_W7.62mm)
-      (datasheet http://www.ti.com/lit/gpn/sn74ls00)
-      (libsource (lib 74xx) (part 74LS00) (description "quad 2-input NAND gate"))
-      (sheetpath (names /) (tstamps /))
-      (tstamp 5C72AA8F))
-    (comp (ref U2)
-      (value 74LS32)
-      (footprint Package_DIP:DIP-14_W7.62mm)
-      (datasheet http://www.ti.com/lit/gpn/sn74LS32)
-      (libsource (lib 74xx) (part 74LS32) (description "Quad 2-input OR"))
-      (sheetpath (names /) (tstamps /))
-      (tstamp 5C72AF3F))
-    (comp (ref DataBuffer1)
-      (value 74LS245)
-      (footprint Package_DIP:DIP-20_W7.62mm)
-      (datasheet http://www.ti.com/lit/gpn/sn74LS245)
-      (libsource (lib 74xx) (part 74LS245) (description "Octal BUS Transceivers, 3-State outputs"))
-      (sheetpath (names /) (tstamps /))
-      (tstamp 5C72BA8A))
-    (comp (ref LowAddrBuffer1)
-      (value 74LS245)
-      (footprint Package_DIP:DIP-20_W7.62mm)
-      (datasheet http://www.ti.com/lit/gpn/sn74LS245)
-      (libsource (lib 74xx) (part 74LS245) (description "Octal BUS Transceivers, 3-State outputs"))
-      (sheetpath (names /) (tstamps /))
-      (tstamp 5C72BDB8))
-    (comp (ref HiAddrBuffer1)
-      (value 74LS245)
-      (footprint Package_DIP:DIP-20_W7.62mm)
-      (datasheet http://www.ti.com/lit/gpn/sn74LS245)
-      (libsource (lib 74xx) (part 74LS245) (description "Octal BUS Transceivers, 3-State outputs"))
-      (sheetpath (names /) (tstamps /))
-      (tstamp 5C72BFE6))
-    (comp (ref LowAddrLatch1)
-      (value 74LS374)
-      (footprint Package_DIP:DIP-20_W7.62mm)
-      (datasheet http://www.ti.com/lit/gpn/sn74LS374)
-      (libsource (lib 74xx) (part 74LS374) (description "8-bit Register, 3-state outputs"))
-      (sheetpath (names /) (tstamps /))
-      (tstamp 5C72C29D))
-    (comp (ref HiAddrLatch1)
-      (value 74LS374)
-      (footprint Package_DIP:DIP-20_W7.62mm)
-      (datasheet http://www.ti.com/lit/gpn/sn74LS374)
-      (libsource (lib 74xx) (part 74LS374) (description "8-bit Register, 3-state outputs"))
-      (sheetpath (names /) (tstamps /))
-      (tstamp 5C72C547))
-    (comp (ref EPROM1)
-      (value 27C080)
-      (footprint Package_DIP:DIP-32_W15.24mm)
-      (datasheet http://ww1.microchip.com/downloads/en/devicedoc/doc0360.pdf)
-      (libsource (lib Memory_EPROM) (part 27C080) (description "OTP EPROM 8 MiBit (1 Mi x 8)"))
-      (sheetpath (names /) (tstamps /))
-      (tstamp 5C72C7EC))
-    (comp (ref C8)
-      (value 0.1µF)
-      (footprint Capacitor_THT:C_Disc_D3.0mm_W2.0mm_P2.50mm)
-      (datasheet ~)
-      (libsource (lib Device) (part C_Small) (description "Unpolarized capacitor, small symbol"))
-      (sheetpath (names /) (tstamps /))
-      (tstamp 5C818D34))
-    (comp (ref C2)
-      (value 0.1µF)
-      (footprint Capacitor_THT:C_Disc_D3.0mm_W2.0mm_P2.50mm)
-      (datasheet ~)
-      (libsource (lib Device) (part C_Small) (description "Unpolarized capacitor, small symbol"))
-      (sheetpath (names /) (tstamps /))
-      (tstamp 5C8192D3))
-    (comp (ref C1)
-      (value 0.1µF)
-      (footprint Capacitor_THT:C_Disc_D3.0mm_W2.0mm_P2.50mm)
-      (datasheet ~)
-      (libsource (lib Device) (part C_Small) (description "Unpolarized capacitor, small symbol"))
-      (sheetpath (names /) (tstamps /))
-      (tstamp 5C81986C))
-    (comp (ref C5)
-      (value 0.1µF)
-      (footprint Capacitor_THT:C_Disc_D3.0mm_W2.0mm_P2.50mm)
-      (datasheet ~)
-      (libsource (lib Device) (part C_Small) (description "Unpolarized capacitor, small symbol"))
-      (sheetpath (names /) (tstamps /))
-      (tstamp 5C81A0E4))
-    (comp (ref C6)
-      (value 0.1µF)
-      (footprint Capacitor_THT:C_Disc_D3.0mm_W2.0mm_P2.50mm)
-      (datasheet ~)
-      (libsource (lib Device) (part C_Small) (description "Unpolarized capacitor, small symbol"))
-      (sheetpath (names /) (tstamps /))
-      (tstamp 5C81A5A9))
-    (comp (ref C7)
-      (value 0.1µF)
-      (footprint Capacitor_THT:C_Disc_D3.0mm_W2.0mm_P2.50mm)
-      (datasheet ~)
-      (libsource (lib Device) (part C_Small) (description "Unpolarized capacitor, small symbol"))
-      (sheetpath (names /) (tstamps /))
-      (tstamp 5C81B5FF))
-    (comp (ref C3)
-      (value 0.1µF)
-      (footprint Capacitor_THT:C_Disc_D3.0mm_W2.0mm_P2.50mm)
-      (datasheet ~)
-      (libsource (lib Device) (part C_Small) (description "Unpolarized capacitor, small symbol"))
-      (sheetpath (names /) (tstamps /))
-      (tstamp 5C81BEDE))
-    (comp (ref C4)
-      (value 0.1µF)
-      (footprint Capacitor_THT:C_Disc_D3.0mm_W2.0mm_P2.50mm)
-      (datasheet ~)
-      (libsource (lib Device) (part C_Small) (description "Unpolarized capacitor, small symbol"))
-      (sheetpath (names /) (tstamps /))
-      (tstamp 5C81C3BC)))
-  (libparts
-    (libpart (lib 74xx) (part 74LS00)
-      (aliases
-        (alias 74LS37)
-        (alias 7400)
-        (alias 74HCT00)
-        (alias 74HC00))
-      (description "quad 2-input NAND gate")
-      (docs http://www.ti.com/lit/gpn/sn74ls00)
-      (footprints
-        (fp DIP*W7.62mm*)
-        (fp SO14*))
-      (fields
-        (field (name Reference) U)
-        (field (name Value) 74LS00))
-      (pins
-        (pin (num 1) (name ~) (type input))
-        (pin (num 2) (name ~) (type input))
-        (pin (num 3) (name ~) (type output))
-        (pin (num 4) (name ~) (type input))
-        (pin (num 5) (name ~) (type input))
-        (pin (num 6) (name ~) (type output))
-        (pin (num 7) (name GND) (type power_in))
-        (pin (num 8) (name ~) (type output))
-        (pin (num 9) (name ~) (type input))
-        (pin (num 10) (name ~) (type input))
-        (pin (num 11) (name ~) (type output))
-        (pin (num 12) (name ~) (type input))
-        (pin (num 13) (name ~) (type input))
-        (pin (num 14) (name VCC) (type power_in))))
-    (libpart (lib 74xx) (part 74LS245)
-      (aliases
-        (alias 74HC245))
-      (description "Octal BUS Transceivers, 3-State outputs")
-      (docs http://www.ti.com/lit/gpn/sn74LS245)
-      (footprints
-        (fp DIP?20*))
-      (fields
-        (field (name Reference) U)
-        (field (name Value) 74LS245))
-      (pins
-        (pin (num 1) (name A->B) (type input))
-        (pin (num 2) (name A0) (type 3state))
-        (pin (num 3) (name A1) (type 3state))
-        (pin (num 4) (name A2) (type 3state))
-        (pin (num 5) (name A3) (type 3state))
-        (pin (num 6) (name A4) (type 3state))
-        (pin (num 7) (name A5) (type 3state))
-        (pin (num 8) (name A6) (type 3state))
-        (pin (num 9) (name A7) (type 3state))
-        (pin (num 10) (name GND) (type power_in))
-        (pin (num 11) (name B7) (type 3state))
-        (pin (num 12) (name B6) (type 3state))
-        (pin (num 13) (name B5) (type 3state))
-        (pin (num 14) (name B4) (type 3state))
-        (pin (num 15) (name B3) (type 3state))
-        (pin (num 16) (name B2) (type 3state))
-        (pin (num 17) (name B1) (type 3state))
-        (pin (num 18) (name B0) (type 3state))
-        (pin (num 19) (name CE) (type input))
-        (pin (num 20) (name VCC) (type power_in))))
-    (libpart (lib 74xx) (part 74LS32)
-      (description "Quad 2-input OR")
-      (docs http://www.ti.com/lit/gpn/sn74LS32)
-      (footprints
-        (fp DIP?14*))
-      (fields
-        (field (name Reference) U)
-        (field (name Value) 74LS32))
-      (pins
-        (pin (num 1) (name ~) (type input))
-        (pin (num 2) (name ~) (type input))
-        (pin (num 3) (name ~) (type output))
-        (pin (num 4) (name ~) (type input))
-        (pin (num 5) (name ~) (type input))
-        (pin (num 6) (name ~) (type output))
-        (pin (num 7) (name GND) (type power_in))
-        (pin (num 8) (name ~) (type output))
-        (pin (num 9) (name ~) (type input))
-        (pin (num 10) (name ~) (type input))
-        (pin (num 11) (name ~) (type output))
-        (pin (num 12) (name ~) (type input))
-        (pin (num 13) (name ~) (type input))
-        (pin (num 14) (name VCC) (type power_in))))
-    (libpart (lib 74xx) (part 74LS374)
-      (aliases
-        (alias 74HC374)
-        (alias 74HCT374)
-        (alias 74AHC374)
-        (alias 74AHCT374))
-      (description "8-bit Register, 3-state outputs")
-      (docs http://www.ti.com/lit/gpn/sn74LS374)
-      (footprints
-        (fp DIP?20*)
-        (fp SOIC?20*)
-        (fp SO?20*))
-      (fields
-        (field (name Reference) U)
-        (field (name Value) 74LS374))
-      (pins
-        (pin (num 1) (name OE) (type input))
-        (pin (num 2) (name O0) (type 3state))
-        (pin (num 3) (name D0) (type input))
-        (pin (num 4) (name D1) (type input))
-        (pin (num 5) (name O1) (type 3state))
-        (pin (num 6) (name O2) (type 3state))
-        (pin (num 7) (name D2) (type input))
-        (pin (num 8) (name D3) (type input))
-        (pin (num 9) (name O3) (type 3state))
-        (pin (num 10) (name GND) (type power_in))
-        (pin (num 11) (name Cp) (type input))
-        (pin (num 12) (name O4) (type 3state))
-        (pin (num 13) (name D4) (type input))
-        (pin (num 14) (name D5) (type input))
-        (pin (num 15) (name O5) (type 3state))
-        (pin (num 16) (name O6) (type 3state))
-        (pin (num 17) (name D6) (type input))
-        (pin (num 18) (name D7) (type input))
-        (pin (num 19) (name O7) (type 3state))
-        (pin (num 20) (name VCC) (type power_in))))
-    (libpart (lib Connector_Generic) (part Conn_02x25_Counter_Clockwise)
-      (description "Generic connector, double row, 02x25, counter clockwise pin numbering scheme (similar to DIP packge numbering), script generated (kicad-library-utils/schlib/autogen/connector/)")
-      (docs ~)
-      (footprints
-        (fp Connector*:*_2x??_*))
-      (fields
-        (field (name Reference) J)
-        (field (name Value) Conn_02x25_Counter_Clockwise))
-      (pins
-        (pin (num 1) (name Pin_1) (type passive))
-        (pin (num 2) (name Pin_2) (type passive))
-        (pin (num 3) (name Pin_3) (type passive))
-        (pin (num 4) (name Pin_4) (type passive))
-        (pin (num 5) (name Pin_5) (type passive))
-        (pin (num 6) (name Pin_6) (type passive))
-        (pin (num 7) (name Pin_7) (type passive))
-        (pin (num 8) (name Pin_8) (type passive))
-        (pin (num 9) (name Pin_9) (type passive))
-        (pin (num 10) (name Pin_10) (type passive))
-        (pin (num 11) (name Pin_11) (type passive))
-        (pin (num 12) (name Pin_12) (type passive))
-        (pin (num 13) (name Pin_13) (type passive))
-        (pin (num 14) (name Pin_14) (type passive))
-        (pin (num 15) (name Pin_15) (type passive))
-        (pin (num 16) (name Pin_16) (type passive))
-        (pin (num 17) (name Pin_17) (type passive))
-        (pin (num 18) (name Pin_18) (type passive))
-        (pin (num 19) (name Pin_19) (type passive))
-        (pin (num 20) (name Pin_20) (type passive))
-        (pin (num 21) (name Pin_21) (type passive))
-        (pin (num 22) (name Pin_22) (type passive))
-        (pin (num 23) (name Pin_23) (type passive))
-        (pin (num 24) (name Pin_24) (type passive))
-        (pin (num 25) (name Pin_25) (type passive))
-        (pin (num 26) (name Pin_26) (type passive))
-        (pin (num 27) (name Pin_27) (type passive))
-        (pin (num 28) (name Pin_28) (type passive))
-        (pin (num 29) (name Pin_29) (type passive))
-        (pin (num 30) (name Pin_30) (type passive))
-        (pin (num 31) (name Pin_31) (type passive))
-        (pin (num 32) (name Pin_32) (type passive))
-        (pin (num 33) (name Pin_33) (type passive))
-        (pin (num 34) (name Pin_34) (type passive))
-        (pin (num 35) (name Pin_35) (type passive))
-        (pin (num 36) (name Pin_36) (type passive))
-        (pin (num 37) (name Pin_37) (type passive))
-        (pin (num 38) (name Pin_38) (type passive))
-        (pin (num 39) (name Pin_39) (type passive))
-        (pin (num 40) (name Pin_40) (type passive))
-        (pin (num 41) (name Pin_41) (type passive))
-        (pin (num 42) (name Pin_42) (type passive))
-        (pin (num 43) (name Pin_43) (type passive))
-        (pin (num 44) (name Pin_44) (type passive))
-        (pin (num 45) (name Pin_45) (type passive))
-        (pin (num 46) (name Pin_46) (type passive))
-        (pin (num 47) (name Pin_47) (type passive))
-        (pin (num 48) (name Pin_48) (type passive))
-        (pin (num 49) (name Pin_49) (type passive))
-        (pin (num 50) (name Pin_50) (type passive))))
-    (libpart (lib Device) (part C_Small)
-      (description "Unpolarized capacitor, small symbol")
-      (docs ~)
-      (footprints
-        (fp C_*))
-      (fields
-        (field (name Reference) C)
-        (field (name Value) C_Small))
-      (pins
-        (pin (num 1) (name ~) (type passive))
-        (pin (num 2) (name ~) (type passive))))
-    (libpart (lib Memory_EPROM) (part 27C080)
-      (description "OTP EPROM 8 MiBit (1 Mi x 8)")
-      (docs http://ww1.microchip.com/downloads/en/devicedoc/doc0360.pdf)
-      (footprints
-        (fp DIP*W15.24mm*)
-        (fp PLCC*))
-      (fields
-        (field (name Reference) U)
-        (field (name Value) 27C080))
-      (pins
-        (pin (num 1) (name A19) (type input))
-        (pin (num 2) (name A16) (type input))
-        (pin (num 3) (name A15) (type input))
-        (pin (num 4) (name A12) (type input))
-        (pin (num 5) (name A7) (type input))
-        (pin (num 6) (name A6) (type input))
-        (pin (num 7) (name A5) (type input))
-        (pin (num 8) (name A4) (type input))
-        (pin (num 9) (name A3) (type input))
-        (pin (num 10) (name A2) (type input))
-        (pin (num 11) (name A1) (type input))
-        (pin (num 12) (name A0) (type input))
-        (pin (num 13) (name D0) (type 3state))
-        (pin (num 14) (name D1) (type 3state))
-        (pin (num 15) (name D2) (type 3state))
-        (pin (num 16) (name GND) (type power_in))
-        (pin (num 17) (name D3) (type 3state))
-        (pin (num 18) (name D4) (type 3state))
-        (pin (num 19) (name D5) (type 3state))
-        (pin (num 20) (name D6) (type 3state))
-        (pin (num 21) (name D7) (type 3state))
-        (pin (num 22) (name ~CE) (type input))
-        (pin (num 23) (name A10) (type input))
-        (pin (num 24) (name ~OE) (type input))
-        (pin (num 25) (name A11) (type input))
-        (pin (num 26) (name A9) (type input))
-        (pin (num 27) (name A8) (type input))
-        (pin (num 28) (name A13) (type input))
-        (pin (num 29) (name A14) (type input))
-        (pin (num 30) (name A17) (type input))
-        (pin (num 31) (name A18) (type input))
-        (pin (num 32) (name VCC) (type power_in)))))
-  (libraries
-    (library (logical 74xx)
-      (uri "/Library/Application Support/kicad/library/74xx.lib"))
-    (library (logical Connector_Generic)
-      (uri "/Library/Application Support/kicad/library/Connector_Generic.lib"))
-    (library (logical Device)
-      (uri "/Library/Application Support/kicad/library/Device.lib"))
-    (library (logical Memory_EPROM)
-      (uri "/Library/Application Support/kicad/library/Memory_EPROM.lib")))
-  (nets
-    (net (code 1) (name "Net-(J1-Pad10)")
-      (node (ref J1) (pin 10)))
-    (net (code 2) (name "Net-(J1-Pad11)")
-      (node (ref J1) (pin 11)))
-    (net (code 3) (name "Net-(J1-Pad12)")
-      (node (ref J1) (pin 12)))
-    (net (code 4) (name "Net-(J1-Pad13)")
-      (node (ref J1) (pin 13)))
-    (net (code 5) (name "Net-(J1-Pad14)")
-      (node (ref J1) (pin 14)))
-    (net (code 6) (name "Net-(J1-Pad15)")
-      (node (ref J1) (pin 15)))
-    (net (code 7) (name "Net-(J1-Pad16)")
-      (node (ref J1) (pin 16)))
-    (net (code 8) (name "Net-(J1-Pad17)")
-      (node (ref J1) (pin 17)))
-    (net (code 9) (name "Net-(J1-Pad18)")
-      (node (ref U1) (pin 10))
-      (node (ref U1) (pin 9))
-      (node (ref U2) (pin 4))
-      (node (ref J1) (pin 18)))
-    (net (code 10) (name "Net-(J1-Pad19)")
-      (node (ref J1) (pin 19)))
-    (net (code 11) (name "Net-(J1-Pad20)")
-      (node (ref J1) (pin 20)))
-    (net (code 12) (name "Net-(J1-Pad21)")
-      (node (ref J1) (pin 21)))
-    (net (code 13) (name "Net-(J1-Pad22)")
-      (node (ref J1) (pin 22)))
-    (net (code 14) (name "Net-(J1-Pad24)")
-      (node (ref J1) (pin 27))
-      (node (ref J1) (pin 24)))
-    (net (code 15) (name "Net-(J1-Pad23)")
-      (node (ref J1) (pin 28))
-      (node (ref J1) (pin 23)))
-    (net (code 16) (name "Net-(J1-Pad29)")
-      (node (ref J1) (pin 29)))
-    (net (code 17) (name "Net-(EPROM1-Pad11)")
-      (node (ref J1) (pin 3))
-      (node (ref EPROM1) (pin 11)))
-    (net (code 18) (name "Net-(J1-Pad30)")
-      (node (ref J1) (pin 30)))
-    (net (code 19) (name "Net-(J1-Pad31)")
-      (node (ref J1) (pin 31)))
-    (net (code 20) (name "Net-(J1-Pad32)")
-      (node (ref J1) (pin 32)))
-    (net (code 21) (name "Net-(J1-Pad33)")
-      (node (ref J1) (pin 33)))
-    (net (code 22) (name "Net-(J1-Pad34)")
-      (node (ref J1) (pin 34)))
-    (net (code 23) (name "Net-(J1-Pad35)")
-      (node (ref J1) (pin 35)))
-    (net (code 24) (name "Net-(J1-Pad36)")
-      (node (ref J1) (pin 36)))
-    (net (code 25) (name "Net-(J1-Pad37)")
-      (node (ref J1) (pin 37)))
-    (net (code 26) (name "Net-(J1-Pad38)")
-      (node (ref J1) (pin 38)))
-    (net (code 27) (name "Net-(J1-Pad39)")
-      (node (ref J1) (pin 39)))
-    (net (code 28) (name "Net-(EPROM1-Pad10)")
-      (node (ref J1) (pin 4))
-      (node (ref EPROM1) (pin 10)))
-    (net (code 29) (name "Net-(J1-Pad40)")
-      (node (ref J1) (pin 40)))
-    (net (code 30) (name "Net-(EPROM1-Pad9)")
-      (node (ref J1) (pin 5))
-      (node (ref EPROM1) (pin 9)))
-    (net (code 31) (name "Net-(J1-Pad50)")
-      (node (ref J1) (pin 50)))
-    (net (code 32) (name "Net-(J1-Pad6)")
-      (node (ref LowAddrBuffer1) (pin 2))
-      (node (ref J1) (pin 6)))
-    (net (code 33) (name "Net-(J1-Pad8)")
-      (node (ref LowAddrBuffer1) (pin 4))
-      (node (ref J1) (pin 8)))
-    (net (code 34) (name "Net-(J1-Pad9)")
-      (node (ref LowAddrBuffer1) (pin 5))
-      (node (ref J1) (pin 9)))
-    (net (code 35) (name "Net-(U1-Pad3)")
-      (node (ref U1) (pin 5))
-      (node (ref U1) (pin 4))
-      (node (ref U1) (pin 3)))
-    (net (code 36) (name "Net-(DataBuffer1-Pad19)")
-      (node (ref DataBuffer1) (pin 19))
-      (node (ref U1) (pin 6))
-      (node (ref U2) (pin 1)))
-    (net (code 37) (name "Net-(DataBuffer1-Pad1)")
-      (node (ref U2) (pin 2))
-      (node (ref U1) (pin 8))
-      (node (ref DataBuffer1) (pin 1)))
-    (net (code 38) (name "Net-(U1-Pad11)")
-      (node (ref U1) (pin 11))
-      (node (ref U2) (pin 13)))
-    (net (code 39) (name "Net-(U2-Pad12)")
-      (node (ref U2) (pin 6))
-      (node (ref U2) (pin 9))
-      (node (ref U2) (pin 12)))
-    (net (code 40) (name "Net-(EPROM1-Pad12)")
-      (node (ref EPROM1) (pin 12))
-      (node (ref J1) (pin 2))
-      (node (ref U1) (pin 12))
-      (node (ref U1) (pin 13))
-      (node (ref U2) (pin 10)))
-    (net (code 41) (name "Net-(HiAddrLatch1-Pad11)")
-      (node (ref HiAddrLatch1) (pin 11))
-      (node (ref U2) (pin 11)))
-    (net (code 42) (name "Net-(DataBuffer1-Pad11)")
-      (node (ref DataBuffer1) (pin 11))
-      (node (ref EPROM1) (pin 21)))
-    (net (code 43) (name "Net-(DataBuffer1-Pad13)")
-      (node (ref EPROM1) (pin 19))
-      (node (ref DataBuffer1) (pin 13)))
-    (net (code 44) (name "Net-(DataBuffer1-Pad15)")
-      (node (ref EPROM1) (pin 17))
-      (node (ref DataBuffer1) (pin 15)))
-    (net (code 45) (name "Net-(EPROM1-Pad25)")
-      (node (ref LowAddrLatch1) (pin 19))
-      (node (ref EPROM1) (pin 25))
-      (node (ref LowAddrBuffer1) (pin 11)))
-    (net (code 46) (name "Net-(EPROM1-Pad23)")
-      (node (ref LowAddrLatch1) (pin 16))
-      (node (ref EPROM1) (pin 23))
-      (node (ref LowAddrBuffer1) (pin 12)))
-    (net (code 47) (name "Net-(EPROM1-Pad26)")
-      (node (ref LowAddrBuffer1) (pin 13))
-      (node (ref LowAddrLatch1) (pin 15))
-      (node (ref EPROM1) (pin 26)))
-    (net (code 48) (name "Net-(EPROM1-Pad27)")
-      (node (ref LowAddrBuffer1) (pin 14))
-      (node (ref EPROM1) (pin 27))
-      (node (ref LowAddrLatch1) (pin 12)))
-    (net (code 49) (name "Net-(EPROM1-Pad5)")
-      (node (ref EPROM1) (pin 5))
-      (node (ref LowAddrLatch1) (pin 9))
-      (node (ref LowAddrBuffer1) (pin 15)))
-    (net (code 50) (name "Net-(EPROM1-Pad6)")
-      (node (ref EPROM1) (pin 6))
-      (node (ref LowAddrLatch1) (pin 6))
-      (node (ref LowAddrBuffer1) (pin 16)))
-    (net (code 51) (name "Net-(EPROM1-Pad7)")
-      (node (ref EPROM1) (pin 7))
-      (node (ref LowAddrLatch1) (pin 5))
-      (node (ref LowAddrBuffer1) (pin 17)))
-    (net (code 52) (name "Net-(EPROM1-Pad8)")
-      (node (ref EPROM1) (pin 8))
-      (node (ref LowAddrBuffer1) (pin 18))
-      (node (ref LowAddrLatch1) (pin 2)))
-    (net (code 53) (name "Net-(HiAddrBuffer1-Pad19)")
-      (node (ref J1) (pin 1))
-      (node (ref HiAddrBuffer1) (pin 19))
-      (node (ref LowAddrBuffer1) (pin 19))
-      (node (ref U1) (pin 1)))
-    (net (code 54) (name +5V)
-      (node (ref C3) (pin 1))
-      (node (ref C7) (pin 1))
-      (node (ref C6) (pin 1))
-      (node (ref C5) (pin 1))
-      (node (ref C1) (pin 1))
-      (node (ref C2) (pin 1))
-      (node (ref C8) (pin 1))
-      (node (ref U2) (pin 14))
-      (node (ref U1) (pin 14))
-      (node (ref DataBuffer1) (pin 20))
-      (node (ref LowAddrBuffer1) (pin 1))
-      (node (ref C4) (pin 1))
-      (node (ref LowAddrBuffer1) (pin 20))
-      (node (ref LowAddrBuffer1) (pin 6))
-      (node (ref LowAddrBuffer1) (pin 7))
-      (node (ref HiAddrBuffer1) (pin 1))
-      (node (ref HiAddrBuffer1) (pin 20))
-      (node (ref J1) (pin 25))
-      (node (ref EPROM1) (pin 32))
-      (node (ref LowAddrLatch1) (pin 20))
-      (node (ref HiAddrLatch1) (pin 20)))
-    (net (code 55) (name GND)
-      (node (ref HiAddrBuffer1) (pin 10))
-      (node (ref LowAddrBuffer1) (pin 9))
-      (node (ref LowAddrBuffer1) (pin 8))
-      (node (ref HiAddrBuffer1) (pin 2))
-      (node (ref HiAddrBuffer1) (pin 3))
-      (node (ref C4) (pin 2))
-      (node (ref C3) (pin 2))
-      (node (ref C7) (pin 2))
-      (node (ref C6) (pin 2))
-      (node (ref HiAddrBuffer1) (pin 4))
-      (node (ref HiAddrBuffer1) (pin 5))
-      (node (ref C5) (pin 2))
-      (node (ref C1) (pin 2))
-      (node (ref HiAddrLatch1) (pin 10))
-      (node (ref C2) (pin 2))
-      (node (ref C8) (pin 2))
-      (node (ref U2) (pin 7))
-      (node (ref U1) (pin 7))
-      (node (ref DataBuffer1) (pin 10))
-      (node (ref EPROM1) (pin 16))
-      (node (ref HiAddrBuffer1) (pin 6))
-      (node (ref HiAddrBuffer1) (pin 7))
-      (node (ref LowAddrLatch1) (pin 10))
-      (node (ref HiAddrBuffer1) (pin 9))
-      (node (ref HiAddrBuffer1) (pin 8))
-      (node (ref LowAddrBuffer1) (pin 10))
-      (node (ref J1) (pin 26)))
-    (net (code 56) (name "Net-(EPROM1-Pad1)")
-      (node (ref HiAddrLatch1) (pin 19))
-      (node (ref EPROM1) (pin 1))
-      (node (ref HiAddrBuffer1) (pin 11)))
-    (net (code 57) (name "Net-(EPROM1-Pad31)")
-      (node (ref HiAddrLatch1) (pin 16))
-      (node (ref EPROM1) (pin 31))
-      (node (ref HiAddrBuffer1) (pin 12)))
-    (net (code 58) (name "Net-(EPROM1-Pad30)")
-      (node (ref HiAddrBuffer1) (pin 13))
-      (node (ref EPROM1) (pin 30))
-      (node (ref HiAddrLatch1) (pin 15)))
-    (net (code 59) (name "Net-(EPROM1-Pad2)")
-      (node (ref EPROM1) (pin 2))
-      (node (ref HiAddrBuffer1) (pin 14))
-      (node (ref HiAddrLatch1) (pin 12)))
-    (net (code 60) (name "Net-(EPROM1-Pad3)")
-      (node (ref HiAddrLatch1) (pin 9))
-      (node (ref HiAddrBuffer1) (pin 15))
-      (node (ref EPROM1) (pin 3)))
-    (net (code 61) (name "Net-(EPROM1-Pad29)")
-      (node (ref HiAddrLatch1) (pin 6))
-      (node (ref EPROM1) (pin 29))
-      (node (ref HiAddrBuffer1) (pin 16)))
-    (net (code 62) (name "Net-(EPROM1-Pad28)")
-      (node (ref HiAddrBuffer1) (pin 17))
-      (node (ref HiAddrLatch1) (pin 5))
-      (node (ref EPROM1) (pin 28)))
-    (net (code 63) (name "Net-(EPROM1-Pad4)")
-      (node (ref HiAddrLatch1) (pin 2))
-      (node (ref EPROM1) (pin 4))
-      (node (ref HiAddrBuffer1) (pin 18)))
-    (net (code 64) (name "Net-(LowAddrLatch1-Pad11)")
-      (node (ref LowAddrLatch1) (pin 11))
-      (node (ref U2) (pin 8)))
-    (net (code 65) (name "Net-(DataBuffer1-Pad6)")
-      (node (ref HiAddrLatch1) (pin 13))
-      (node (ref DataBuffer1) (pin 6))
-      (node (ref J1) (pin 45))
-      (node (ref LowAddrLatch1) (pin 13)))
-    (net (code 66) (name "Net-(DataBuffer1-Pad7)")
-      (node (ref J1) (pin 44))
-      (node (ref HiAddrLatch1) (pin 14))
-      (node (ref DataBuffer1) (pin 7))
-      (node (ref LowAddrLatch1) (pin 14)))
-    (net (code 67) (name "Net-(DataBuffer1-Pad8)")
-      (node (ref LowAddrLatch1) (pin 17))
-      (node (ref DataBuffer1) (pin 8))
-      (node (ref HiAddrLatch1) (pin 17))
-      (node (ref J1) (pin 43)))
-    (net (code 68) (name "Net-(DataBuffer1-Pad2)")
-      (node (ref HiAddrLatch1) (pin 3))
-      (node (ref LowAddrLatch1) (pin 3))
-      (node (ref DataBuffer1) (pin 2))
-      (node (ref J1) (pin 49)))
-    (net (code 69) (name "Net-(DataBuffer1-Pad3)")
-      (node (ref J1) (pin 48))
-      (node (ref HiAddrLatch1) (pin 4))
-      (node (ref DataBuffer1) (pin 3))
-      (node (ref LowAddrLatch1) (pin 4)))
-    (net (code 70) (name "Net-(DataBuffer1-Pad4)")
-      (node (ref DataBuffer1) (pin 4))
-      (node (ref LowAddrLatch1) (pin 7))
-      (node (ref J1) (pin 47))
-      (node (ref HiAddrLatch1) (pin 7)))
-    (net (code 71) (name "Net-(DataBuffer1-Pad5)")
-      (node (ref DataBuffer1) (pin 5))
-      (node (ref LowAddrLatch1) (pin 8))
-      (node (ref J1) (pin 46))
-      (node (ref HiAddrLatch1) (pin 8)))
-    (net (code 72) (name "Net-(DataBuffer1-Pad12)")
-      (node (ref DataBuffer1) (pin 12))
-      (node (ref EPROM1) (pin 20)))
-    (net (code 73) (name "Net-(EPROM1-Pad22)")
-      (node (ref U2) (pin 3))
-      (node (ref EPROM1) (pin 22))
-      (node (ref EPROM1) (pin 24)))
-    (net (code 74) (name "Net-(DataBuffer1-Pad18)")
-      (node (ref EPROM1) (pin 13))
-      (node (ref DataBuffer1) (pin 18)))
-    (net (code 75) (name "Net-(DataBuffer1-Pad17)")
-      (node (ref DataBuffer1) (pin 17))
-      (node (ref EPROM1) (pin 14)))
-    (net (code 76) (name "Net-(DataBuffer1-Pad16)")
-      (node (ref EPROM1) (pin 15))
-      (node (ref DataBuffer1) (pin 16)))
-    (net (code 77) (name "Net-(DataBuffer1-Pad14)")
-      (node (ref DataBuffer1) (pin 14))
-      (node (ref EPROM1) (pin 18)))
-    (net (code 78) (name "Net-(J1-Pad7)")
-      (node (ref J1) (pin 7))
-      (node (ref LowAddrBuffer1) (pin 3)))
-    (net (code 79) (name "Net-(HiAddrLatch1-Pad1)")
-      (node (ref HiAddrLatch1) (pin 1))
-      (node (ref U1) (pin 2))
-      (node (ref LowAddrLatch1) (pin 1))
-      (node (ref J1) (pin 41))
-      (node (ref U2) (pin 5)))
-    (net (code 80) (name "Net-(DataBuffer1-Pad9)")
-      (node (ref DataBuffer1) (pin 9))
-      (node (ref J1) (pin 42))
-      (node (ref LowAddrLatch1) (pin 18))
-      (node (ref HiAddrLatch1) (pin 18)))))
--- a/Hardware/ProDOS
+++ b/Hardware/ProDOS
--- a/Hardware/ProDOS
+++ b/Hardware/ProDOS
@ -1,270 +0,0 @@
-update=Wednesday, December 08, 2021 at 10:19:11 pm
-version=1
-last_client=kicad
-[general]
-version=1
-RootSch=
-BoardNm=
-[cvpcb]
-version=1
-NetIExt=net
-[eeschema]
-version=1
-LibDir=
-[eeschema/libraries]
-[schematic_editor]
-version=1
-PageLayoutDescrFile=
-PlotDirectoryName=
-SubpartIdSeparator=0
-SubpartFirstId=65
-NetFmtName=Pcbnew
-SpiceAjustPassiveValues=0
-LabSize=50
-ERC_TestSimilarLabels=1
-[pcbnew]
-version=1
-PageLayoutDescrFile=
-LastNetListRead=ProDOS ROM-Drive 3.0.net
-CopperLayerCount=2
-BoardThickness=1.6
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-ProhibitOverlappingCourtyards=1
-MinTrackWidth=0.1778
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-TrackWidth1=0.1778
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-dPairWidth1=0.2
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-SilkLineWidth=0.15
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-CopperLineWidth=0.2
-CopperTextSizeV=1.5
-CopperTextSizeH=1.5
-CopperTextThickness=0.3
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-SolderMaskClearance=0.051
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-[pcbnew/Layer.F.Cu]
-Name=F.Cu
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-Enabled=1
-[pcbnew/Layer.In1.Cu]
-Name=In1.Cu
-Type=0
-Enabled=0
-[pcbnew/Layer.In2.Cu]
-Name=In2.Cu
-Type=0
-Enabled=0
-[pcbnew/Layer.In3.Cu]
-Name=In3.Cu
-Type=0
-Enabled=0
-[pcbnew/Layer.In4.Cu]
-Name=In4.Cu
-Type=0
-Enabled=0
-[pcbnew/Layer.In5.Cu]
-Name=In5.Cu
-Type=0
-Enabled=0
-[pcbnew/Layer.In6.Cu]
-Name=In6.Cu
-Type=0
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-[pcbnew/Layer.In7.Cu]
-Name=In7.Cu
-Type=0
-Enabled=0
-[pcbnew/Layer.In8.Cu]
-Name=In8.Cu
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-[pcbnew/Layer.In9.Cu]
-Name=In9.Cu
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-[pcbnew/Layer.In10.Cu]
-Name=In10.Cu
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-[pcbnew/Layer.In11.Cu]
-Name=In11.Cu
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-[pcbnew/Layer.In12.Cu]
-Name=In12.Cu
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-[pcbnew/Layer.In13.Cu]
-Name=In13.Cu
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-[pcbnew/Layer.In14.Cu]
-Name=In14.Cu
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-[pcbnew/Layer.In15.Cu]
-Name=In15.Cu
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-[pcbnew/Layer.In16.Cu]
-Name=In16.Cu
-Type=0
-Enabled=0
-[pcbnew/Layer.In17.Cu]
-Name=In17.Cu
-Type=0
-Enabled=0
-[pcbnew/Layer.In18.Cu]
-Name=In18.Cu
-Type=0
-Enabled=0
-[pcbnew/Layer.In19.Cu]
-Name=In19.Cu
-Type=0
-Enabled=0
-[pcbnew/Layer.In20.Cu]
-Name=In20.Cu
-Type=0
-Enabled=0
-[pcbnew/Layer.In21.Cu]
-Name=In21.Cu
-Type=0
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-[pcbnew/Layer.In22.Cu]
-Name=In22.Cu
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-[pcbnew/Layer.In23.Cu]
-Name=In23.Cu
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-[pcbnew/Layer.In24.Cu]
-Name=In24.Cu
-Type=0
-Enabled=0
-[pcbnew/Layer.In25.Cu]
-Name=In25.Cu
-Type=0
-Enabled=0
-[pcbnew/Layer.In26.Cu]
-Name=In26.Cu
-Type=0
-Enabled=0
-[pcbnew/Layer.In27.Cu]
-Name=In27.Cu
-Type=0
-Enabled=0
-[pcbnew/Layer.In28.Cu]
-Name=In28.Cu
-Type=0
-Enabled=0
-[pcbnew/Layer.In29.Cu]
-Name=In29.Cu
-Type=0
-Enabled=0
-[pcbnew/Layer.In30.Cu]
-Name=In30.Cu
-Type=0
-Enabled=0
-[pcbnew/Layer.B.Cu]
-Name=B.Cu
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-[pcbnew/Layer.B.Adhes]
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-[pcbnew/Layer.F.Adhes]
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-[pcbnew/Layer.B.Paste]
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-[pcbnew/Layer.F.Paste]
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-[pcbnew/Layer.B.SilkS]
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-[pcbnew/Layer.F.SilkS]
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-[pcbnew/Layer.B.Mask]
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-[pcbnew/Layer.F.Mask]
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-[pcbnew/Layer.Dwgs.User]
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-[pcbnew/Layer.Cmts.User]
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-[pcbnew/Layer.Eco1.User]
-Enabled=1
-[pcbnew/Layer.Eco2.User]
-Enabled=1
-[pcbnew/Layer.Edge.Cuts]
-Enabled=1
-[pcbnew/Layer.Margin]
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-[pcbnew/Layer.B.CrtYd]
-Enabled=1
-[pcbnew/Layer.F.CrtYd]
-Enabled=1
-[pcbnew/Layer.B.Fab]
-Enabled=0
-[pcbnew/Layer.F.Fab]
-Enabled=1
-[pcbnew/Layer.Rescue]
-Enabled=0
-[pcbnew/Netclasses]
-[pcbnew/Netclasses/Default]
-Name=Default
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-dPairWidth=0.2
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-dPairViaGap=0.25
-[pcbnew/Netclasses/1]
-Name=Ground
-Clearance=0.254
-TrackWidth=0.8128
-ViaDiameter=0.762
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-uViaDiameter=0.3
-uViaDrill=0.1
-dPairWidth=0.2
-dPairGap=0.25
-dPairViaGap=0.25
-[pcbnew/Netclasses/2]
-Name=Power
-Clearance=0.254
-TrackWidth=0.8128
-ViaDiameter=0.762
-ViaDrill=0.7112
-uViaDiameter=0.3
-uViaDrill=0.1
-dPairWidth=0.2
-dPairGap=0.25
-dPairViaGap=0.25
--- a/Hardware/ProDOS
+++ b/Hardware/ProDOS
--- a/Hardware/ProDOS
+++ b/Hardware/ProDOS
--- a/Hardware/ProDOS
+++ b/Hardware/ProDOS
--- a/Hardware/ProDOS
+++ b/Hardware/ProDOS
--- a/ROM-Drive-B_Cu.gbr
+++ b/ROM-Drive-B_Cu.gbr
--- a/ROM-Drive-B_Mask.gbr
+++ b/ROM-Drive-B_Mask.gbr
--- a/ROM-Drive-B_Silkscreen.gbr
+++ b/ROM-Drive-B_Silkscreen.gbr
@ -0,0 +1,975 @@
+G04 #@! TF.GenerationSoftware,KiCad,Pcbnew,(6.0.2-0)*
+G04 #@! TF.CreationDate,2022-03-19T10:19:41-04:00*
+G04 #@! TF.ProjectId,ProDOS ROM-Drive,50726f44-4f53-4205-924f-4d2d44726976,4.0*
+G04 #@! TF.SameCoordinates,Original*
+G04 #@! TF.FileFunction,Legend,Bot*
+G04 #@! TF.FilePolarity,Positive*
+%FSLAX46Y46*%
+G04 Gerber Fmt 4.6, Leading zero omitted, Abs format (unit mm)*
+G04 Created by KiCad (PCBNEW (6.0.2-0)) date 2022-03-19 10:19:41*
+%MOMM*%
+%LPD*%
+G01*
+G04 APERTURE LIST*
+%ADD10C,0.200000*%
+%ADD11C,0.149860*%
+G04 APERTURE END LIST*
+D10*
+X-488696000Y337058000D02*
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--- a/ROM-Drive-Edge_Cuts.gbr
+++ b/ROM-Drive-Edge_Cuts.gbr
@ -1,11 +1,11 @@
-G04 #@! TF.GenerationSoftware,KiCad,Pcbnew,(5.1.10-1-10_14)*
-G04 #@! TF.CreationDate,2021-12-12T10:22:25-05:00*
-G04 #@! TF.ProjectId,ProDOS ROM-Drive 3.0,50726f44-4f53-4205-924f-4d2d44726976,3.0*
+G04 #@! TF.GenerationSoftware,KiCad,Pcbnew,(6.0.2-0)*
+G04 #@! TF.CreationDate,2022-03-19T10:19:41-04:00*
+G04 #@! TF.ProjectId,ProDOS ROM-Drive,50726f44-4f53-4205-924f-4d2d44726976,4.0*
 G04 #@! TF.SameCoordinates,Original*
 G04 #@! TF.FileFunction,Profile,NP*
 %FSLAX46Y46*%
 G04 Gerber Fmt 4.6, Leading zero omitted, Abs format (unit mm)*
-G04 Created by KiCad (PCBNEW (5.1.10-1-10_14)) date 2021-12-12 10:22:25*
+G04 Created by KiCad (PCBNEW (6.0.2-0)) date 2022-03-19 10:19:41*
 %MOMM*%
 %LPD*%
 G01*
@ -15,30 +15,30 @@ G04 #@! TA.AperFunction,Profile*
 G04 #@! TD*
 G04 APERTURE END LIST*
 D10*
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 M02*
--- a/ROM-Drive-F_Cu.gbr
+++ b/ROM-Drive-F_Cu.gbr
--- a/ROM-Drive-F_Mask.gbr
+++ b/ROM-Drive-F_Mask.gbr
--- a/ROM-Drive-F_Silkscreen.gbr
+++ b/ROM-Drive-F_Silkscreen.gbr
--- a/ROM-Drive-NPTH.drl
+++ b/ROM-Drive-NPTH.drl
@ -0,0 +1,13 @@
+M48
+; DRILL file {KiCad (6.0.2-0)} date Saturday, March 19, 2022 at 10:19:38 am
+; FORMAT={-:-/ absolute / inch / decimal}
+; #@! TF.CreationDate,2022-03-19T10:19:38-04:00
+; #@! TF.GenerationSoftware,Kicad,Pcbnew,(6.0.2-0)
+; #@! TF.FileFunction,NonPlated,1,2,NPTH
+FMAT,2
+INCH
+%
+G90
+G05
+T0
+M30
--- a/ROM-Drive-PTH.drl
+++ b/ROM-Drive-PTH.drl
@ -1,14 +1,18 @@
 M48
-; DRILL file {KiCad (5.1.10-1-10_14)} date Sunday, December 12, 2021 at 10:22:21 AM
+; DRILL file {KiCad (6.0.2-0)} date Saturday, March 19, 2022 at 10:19:38 am
 ; FORMAT={-:-/ absolute / inch / decimal}
-; #@! TF.CreationDate,2021-12-12T10:22:21-05:00
-; #@! TF.GenerationSoftware,Kicad,Pcbnew,(5.1.10-1-10_14)
+; #@! TF.CreationDate,2022-03-19T10:19:38-04:00
+; #@! TF.GenerationSoftware,Kicad,Pcbnew,(6.0.2-0)
 ; #@! TF.FileFunction,Plated,1,2,PTH
 FMAT,2
 INCH
+; #@! TA.AperFunction,Plated,PTH,ViaDrill
 T1C0.0197
+; #@! TA.AperFunction,Plated,PTH,ViaDrill
 T2C0.0280
+; #@! TA.AperFunction,Plated,PTH,ComponentDrill
 T3C0.0315
+; #@! TA.AperFunction,Plated,PTH,ComponentDrill
 T4C0.0350
 %
 G90
@ -22,6 +26,7 @@ X2.1493Y-1.1543
 X2.1645Y-1.4737
 X2.1912Y-1.0767
 X2.2258Y-2.6835
+X2.23Y-1.69
 X2.2426Y-2.5392
 X2.2937Y-1.0767
 X2.2938Y-2.6691
@ -52,13 +57,10 @@ X2.957Y-1.8049
 X2.9732Y-2.5472
 X2.9849Y-1.9434
 X2.9946Y-1.9027
-X3.0197Y-1.8489
 X3.0264Y-2.3902
 X3.0272Y-1.269
 X3.0351Y-1.3172
 X3.0351Y-1.4418
-X3.0351Y-1.7117
-X3.0351Y-1.7714
 X3.045Y-2.2276
 X3.0707Y-2.5525
 X3.0926Y-2.2802
@ -69,7 +71,6 @@ X3.1191Y-2.5522
 X3.1246Y-2.2143
 X3.1282Y-1.1482
 X3.1314Y-1.0788
-X3.1365Y-1.6439
 X3.1451Y-1.9371
 X3.149Y-1.434
 X3.1796Y-2.0627
--- a/ROM-Drive-cache.lib
+++ b/ROM-Drive-cache.lib
--- a/ROM-Drive.kicad_pcb
+++ b/ROM-Drive.kicad_pcb
--- a/ROM-Drive.kicad_prl
+++ b/ROM-Drive.kicad_prl
@ -0,0 +1,75 @@
+{
+  "board": {
+    "active_layer": 36,
+    "active_layer_preset": "",
+    "auto_track_width": true,
+    "hidden_nets": [],
+    "high_contrast_mode": 0,
+    "net_color_mode": 1,
+    "opacity": {
+      "pads": 1.0,
+      "tracks": 1.0,
+      "vias": 1.0,
+      "zones": 0.6
+    },
+    "ratsnest_display_mode": 0,
+    "selection_filter": {
+      "dimensions": true,
+      "footprints": true,
+      "graphics": true,
+      "keepouts": true,
+      "lockedItems": true,
+      "otherItems": true,
+      "pads": true,
+      "text": true,
+      "tracks": true,
+      "vias": true,
+      "zones": true
+    },
+    "visible_items": [
+      0,
+      1,
+      2,
+      3,
+      4,
+      5,
+      8,
+      9,
+      10,
+      11,
+      12,
+      13,
+      14,
+      15,
+      16,
+      17,
+      18,
+      19,
+      20,
+      21,
+      22,
+      23,
+      24,
+      25,
+      26,
+      27,
+      28,
+      29,
+      30,
+      32,
+      33,
+      34,
+      35,
+      36
+    ],
+    "visible_layers": "00010f0_80000001",
+    "zone_display_mode": 0
+  },
+  "meta": {
+    "filename": "ProDOS ROM-Drive.kicad_prl",
+    "version": 3
+  },
+  "project": {
+    "files": []
+  }
+}
--- a/ROM-Drive.kicad_pro
+++ b/ROM-Drive.kicad_pro
@ -0,0 +1,474 @@
+{
+  "board": {
+    "design_settings": {
+      "defaults": {
+        "board_outline_line_width": 0.15,
+        "copper_line_width": 0.19999999999999998,
+        "copper_text_italic": false,
+        "copper_text_size_h": 1.5,
+        "copper_text_size_v": 1.5,
+        "copper_text_thickness": 0.3,
+        "copper_text_upright": false,
+        "courtyard_line_width": 0.049999999999999996,
+        "dimension_precision": 4,
+        "dimension_units": 3,
+        "dimensions": {
+          "arrow_length": 1270000,
+          "extension_offset": 500000,
+          "keep_text_aligned": true,
+          "suppress_zeroes": false,
+          "text_position": 0,
+          "units_format": 1
+        },
+        "fab_line_width": 0.09999999999999999,
+        "fab_text_italic": false,
+        "fab_text_size_h": 1.0,
+        "fab_text_size_v": 1.0,
+        "fab_text_thickness": 0.15,
+        "fab_text_upright": false,
+        "other_line_width": 0.09999999999999999,
+        "other_text_italic": false,
+        "other_text_size_h": 1.0,
+        "other_text_size_v": 1.0,
+        "other_text_thickness": 0.15,
+        "other_text_upright": false,
+        "pads": {
+          "drill": 0.889,
+          "height": 1.6,
+          "width": 1.6
+        },
+        "silk_line_width": 0.15,
+        "silk_text_italic": false,
+        "silk_text_size_h": 1.0,
+        "silk_text_size_v": 1.0,
+        "silk_text_thickness": 0.15,
+        "silk_text_upright": false,
+        "zones": {
+          "45_degree_only": false,
+          "min_clearance": 0.508
+        }
+      },
+      "diff_pair_dimensions": [
+        {
+          "gap": 0.0,
+          "via_gap": 0.0,
+          "width": 0.0
+        }
+      ],
+      "drc_exclusions": [],
+      "meta": {
+        "filename": "board_design_settings.json",
+        "version": 2
+      },
+      "rule_severities": {
+        "annular_width": "error",
+        "clearance": "error",
+        "copper_edge_clearance": "error",
+        "courtyards_overlap": "error",
+        "diff_pair_gap_out_of_range": "error",
+        "diff_pair_uncoupled_length_too_long": "error",
+        "drill_out_of_range": "error",
+        "duplicate_footprints": "warning",
+        "extra_footprint": "warning",
+        "footprint_type_mismatch": "error",
+        "hole_clearance": "error",
+        "hole_near_hole": "error",
+        "invalid_outline": "error",
+        "item_on_disabled_layer": "error",
+        "items_not_allowed": "error",
+        "length_out_of_range": "error",
+        "malformed_courtyard": "error",
+        "microvia_drill_out_of_range": "error",
+        "missing_courtyard": "ignore",
+        "missing_footprint": "warning",
+        "net_conflict": "warning",
+        "npth_inside_courtyard": "ignore",
+        "padstack": "error",
+        "pth_inside_courtyard": "ignore",
+        "shorting_items": "error",
+        "silk_over_copper": "warning",
+        "silk_overlap": "warning",
+        "skew_out_of_range": "error",
+        "through_hole_pad_without_hole": "error",
+        "too_many_vias": "error",
+        "track_dangling": "warning",
+        "track_width": "error",
+        "tracks_crossing": "error",
+        "unconnected_items": "error",
+        "unresolved_variable": "error",
+        "via_dangling": "warning",
+        "zone_has_empty_net": "error",
+        "zones_intersect": "error"
+      },
+      "rule_severitieslegacy_courtyards_overlap": true,
+      "rule_severitieslegacy_no_courtyard_defined": false,
+      "rules": {
+        "allow_blind_buried_vias": false,
+        "allow_microvias": false,
+        "max_error": 0.005,
+        "min_clearance": 0.0,
+        "min_copper_edge_clearance": 0.075,
+        "min_hole_clearance": 0.25,
+        "min_hole_to_hole": 0.25,
+        "min_microvia_diameter": 0.19999999999999998,
+        "min_microvia_drill": 0.09999999999999999,
+        "min_silk_clearance": 0.0,
+        "min_through_hole_diameter": 0.3,
+        "min_track_width": 0.17779999999999999,
+        "min_via_annular_width": 0.049999999999999996,
+        "min_via_diameter": 0.39999999999999997,
+        "use_height_for_length_calcs": true
+      },
+      "track_widths": [
+        0.0
+      ],
+      "via_dimensions": [
+        {
+          "diameter": 0.0,
+          "drill": 0.0
+        }
+      ],
+      "zones_allow_external_fillets": false,
+      "zones_use_no_outline": true
+    },
+    "layer_presets": []
+  },
+  "boards": [],
+  "cvpcb": {
+    "equivalence_files": []
+  },
+  "erc": {
+    "erc_exclusions": [],
+    "meta": {
+      "version": 0
+    },
+    "pin_map": [
+      [
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        1,
+        0,
+        0,
+        0,
+        0,
+        2
+      ],
+      [
+        0,
+        2,
+        0,
+        1,
+        0,
+        0,
+        1,
+        0,
+        2,
+        2,
+        2,
+        2
+      ],
+      [
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        1,
+        0,
+        1,
+        0,
+        1,
+        2
+      ],
+      [
+        0,
+        1,
+        0,
+        0,
+        0,
+        0,
+        1,
+        1,
+        2,
+        1,
+        1,
+        2
+      ],
+      [
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        1,
+        0,
+        0,
+        0,
+        0,
+        2
+      ],
+      [
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        0,
+        2
+      ],
+      [
+        1,
+        1,
+        1,
+        1,
+        1,
+        0,
+        1,
+        1,
+        1,
+        1,
+        1,
+        2
+      ],
+      [
+        0,
+        0,
+        0,
+        1,
+        0,
+        0,
+        1,
+        0,
+        0,
+        0,
+        0,
+        2
+      ],
+      [
+        0,
+        2,
+        1,
+        2,
+        0,
+        0,
+        1,
+        0,
+        2,
+        2,
+        2,
+        2
+      ],
+      [
+        0,
+        2,
+        0,
+        1,
+        0,
+        0,
+        1,
+        0,
+        2,
+        0,
+        0,
+        2
+      ],
+      [
+        0,
+        2,
+        1,
+        1,
+        0,
+        0,
+        1,
+        0,
+        2,
+        0,
+        0,
+        2
+      ],
+      [
+        2,
+        2,
+        2,
+        2,
+        2,
+        2,
+        2,
+        2,
+        2,
+        2,
+        2,
+        2
+      ]
+    ],
+    "rule_severities": {
+      "bus_definition_conflict": "error",
+      "bus_entry_needed": "error",
+      "bus_label_syntax": "error",
+      "bus_to_bus_conflict": "error",
+      "bus_to_net_conflict": "error",
+      "different_unit_footprint": "error",
+      "different_unit_net": "error",
+      "duplicate_reference": "error",
+      "duplicate_sheet_names": "error",
+      "extra_units": "error",
+      "global_label_dangling": "warning",
+      "hier_label_mismatch": "error",
+      "label_dangling": "error",
+      "lib_symbol_issues": "warning",
+      "multiple_net_names": "warning",
+      "net_not_bus_member": "warning",
+      "no_connect_connected": "warning",
+      "no_connect_dangling": "warning",
+      "pin_not_connected": "error",
+      "pin_not_driven": "error",
+      "pin_to_pin": "warning",
+      "power_pin_not_driven": "error",
+      "similar_labels": "warning",
+      "unannotated": "error",
+      "unit_value_mismatch": "error",
+      "unresolved_variable": "error",
+      "wire_dangling": "error"
+    }
+  },
+  "libraries": {
+    "pinned_footprint_libs": [],
+    "pinned_symbol_libs": []
+  },
+  "meta": {
+    "filename": "ProDOS ROM-Drive.kicad_pro",
+    "version": 1
+  },
+  "net_settings": {
+    "classes": [
+      {
+        "bus_width": 12.0,
+        "clearance": 0.1778,
+        "diff_pair_gap": 0.25,
+        "diff_pair_via_gap": 0.25,
+        "diff_pair_width": 0.2,
+        "line_style": 0,
+        "microvia_diameter": 0.3,
+        "microvia_drill": 0.1,
+        "name": "Default",
+        "pcb_color": "rgba(0, 0, 0, 0.000)",
+        "schematic_color": "rgba(0, 0, 0, 0.000)",
+        "track_width": 0.1778,
+        "via_diameter": 0.762,
+        "via_drill": 0.50038,
+        "wire_width": 6.0
+      },
+      {
+        "bus_width": 12.0,
+        "clearance": 0.254,
+        "diff_pair_gap": 0.25,
+        "diff_pair_via_gap": 0.25,
+        "diff_pair_width": 0.2,
+        "line_style": 0,
+        "microvia_diameter": 0.3,
+        "microvia_drill": 0.1,
+        "name": "Ground",
+        "nets": [
+          "GND"
+        ],
+        "pcb_color": "rgba(0, 0, 0, 0.000)",
+        "schematic_color": "rgba(0, 0, 0, 0.000)",
+        "track_width": 0.8128,
+        "via_diameter": 0.762,
+        "via_drill": 0.7112,
+        "wire_width": 6.0
+      },
+      {
+        "bus_width": 12.0,
+        "clearance": 0.254,
+        "diff_pair_gap": 0.25,
+        "diff_pair_via_gap": 0.25,
+        "diff_pair_width": 0.2,
+        "line_style": 0,
+        "microvia_diameter": 0.3,
+        "microvia_drill": 0.1,
+        "name": "Power",
+        "nets": [
+          "+5V"
+        ],
+        "pcb_color": "rgba(0, 0, 0, 0.000)",
+        "schematic_color": "rgba(0, 0, 0, 0.000)",
+        "track_width": 0.8128,
+        "via_diameter": 0.762,
+        "via_drill": 0.7112,
+        "wire_width": 6.0
+      }
+    ],
+    "meta": {
+      "version": 2
+    },
+    "net_colors": null
+  },
+  "pcbnew": {
+    "last_paths": {
+      "gencad": "",
+      "idf": "",
+      "netlist": "ProDOS ROM-Drive 3.0.net",
+      "specctra_dsn": "",
+      "step": "",
+      "vrml": ""
+    },
+    "page_layout_descr_file": ""
+  },
+  "schematic": {
+    "annotate_start_num": 0,
+    "drawing": {
+      "default_line_thickness": 6.0,
+      "default_text_size": 50.0,
+      "field_names": [],
+      "intersheets_ref_own_page": false,
+      "intersheets_ref_prefix": "",
+      "intersheets_ref_short": false,
+      "intersheets_ref_show": false,
+      "intersheets_ref_suffix": "",
+      "junction_size_choice": 3,
+      "label_size_ratio": 0.25,
+      "pin_symbol_size": 0.0,
+      "text_offset_ratio": 0.08
+    },
+    "legacy_lib_dir": "",
+    "legacy_lib_list": [],
+    "meta": {
+      "version": 1
+    },
+    "net_format_name": "Pcbnew",
+    "ngspice": {
+      "fix_include_paths": true,
+      "fix_passive_vals": false,
+      "meta": {
+        "version": 0
+      },
+      "model_mode": 0,
+      "workbook_filename": ""
+    },
+    "page_layout_descr_file": "",
+    "plot_directory": "",
+    "spice_adjust_passive_values": false,
+    "spice_external_command": "spice \"%I\"",
+    "subpart_first_id": 65,
+    "subpart_id_separator": 0
+  },
+  "sheets": [
+    [
+      "aa2ea573-3f20-43c1-aa99-1f9c6031a9aa",
+      ""
+    ]
+  ],
+  "text_variables": {}
+}
--- a/ROM-Drive.kicad_sch
+++ b/ROM-Drive.kicad_sch
--- a/Hardware/ProDOS
+++ b/Hardware/ProDOS
--- a/Hardware/ProDOS
+++ b/Hardware/ProDOS
--- a/Hardware/fp-info-cache
+++ b/Hardware/fp-info-cache
--- a/README.md
+++ b/README.md
@ -1,12 +1,12 @@
-# v3
-This is a new revision of the hardware, incompatible with previous firmware and drive image. If you have a v2.5 board, see the v2.5 tag [here](https://github.com/tjboldt/ProDOS-ROM-Drive/tree/v2.5)
+# v4.0
+This is a new revision of the hardware, incompatible with previous firmware and drive image before v3. If you have a v2.5 board, see the v2.5 tag [here](https://github.com/tjboldt/ProDOS-ROM-Drive/tree/v2.5). Note that all of v2.1, v2.5 and v3.0 have a small design mistake that didn't properly buffer the data bus the way it was intended in the original v1.0 version. This has been fixed for v4.0.

 # ProDOS ROM-Drive
 This is a peripheral card for the Apple ][ series computers that acts as a read-only solid state disk drive (SSD) all in EPROM. Although it won't run DOS, it is fully ProDOS compatible and will appear as a read-only hard drive even when booting from another drive. It holds 1024 KB of disk data with the 256 byte firmware stored in block 0001 where the SOS boot loader normally resides. The drive boots ProDOS and into BASIC in under 1.5 seconds. 

-![Image of Board](/Hardware/ProDOS%20ROM-Drive%203.0%20Front.jpg)
+![Image of Board](/Hardware/ProDOS%20ROM-Drive%20Front.jpg)

-You can order blank circuit boards from [PCBWay](https://www.pcbway.com/project/shareproject/ProDOS_ROM_Drive_v3_1903e388.html) or upload the provided gerber and drill files to any PCB manufacturer.
+You can order blank circuit boards from [PCBWay](https://www.pcbway.com/project/shareproject/ProDOS_ROM_Drive_v4_4fe0794f.html) or upload the provided gerber and drill files to any PCB manufacturer.

 ## History