====== ISA Backplane ======
{{:boards:isa:isa-backplane:photos:isa_backplane.jpg?nolink&640|}}
{{:boards:isa:isa-backplane:photos:isa_backplane_with_xi_8088.jpg?nolink&640|}}

===== Introduction =====
==== About ====

ISA Backplane board was designed by Sergey Kiselev ([[http://www.malinov.com/Home/sergeys-projects|http://www.malinov.com/Home/sergeys-projects]]) and is designed to be used together with the Xi 8088 processor board, but it can be used with other ISA SBC boards. In addition to eight parallelly connected ISA slots this backplane includes an ATX power on/off circuit, a Port 80h POST display, a -5V regulator (most ATX power supplies don't supply -5V, but it can be required for some older ISA cards), serial port header, and a prototyping space.


==== Specifications ====
  * 8 ISA Slots
  * Micro ATX compatible form factor
  * ATX power control circuit
  * -5V regulator
  * Port 80h POST diagnostic display
  * 5 Power indicator LEDs (standby, 5V, -5V, 12V, -12V)
  * Serial DE9M header
  * Reset button and header

===== Hardware Documentation =====
Current Board Revision: Rev 1.1

Board: {{:boards:isa:isa-backplane:isa_blackplane-1.1-brd.pdf|}}

Schematic: {{:boards:isa:isa-backplane:isa_backplane-1.1-sch.pdf|}}

Manufacturing Files: {{:boards:isa:isa-backplane:isa_backplane-gerber-1.1.zip|}}

KiCAD Files: {{:boards:isa:isa-backplane:isa_backplane-kicad-1.1.zip|}}

Note:  The only change between Rev 1.0 and Rev 1.1 was a slight re-positioning of the main ATX power connector.  The {{:boards:isa:isa-backplane:obsolete_isa_backplane-1.0.zip|Rev 1.0 files are archived here.}}

===== Build Information =====
==== Jumpers, Connectors, and Switches ====
FIXME Create a nice graphic of the jumpers/switches on this board! FIXME

It is recommended to solder wire bridges instead of J2 - J4 according to your 7-segment LED display and binary to 7-segment decoder type. Please refer to Bill of Materials section for displays' and decoders' selection.

==== Bill of Materials (BOM) ====

^Component Type^Reference^Description^Quantity^Possible sources and notes|
|  PCB  |   |ISA Backplane PCB Version 1.1  |  1  |Order from Todd Goodman, see [[:boardinventory|RetroBrew Computers Board Inventory]]  |
|  Capacitor  |  C1 - C51  |10 uF ceramic, 5.08 mm lead spacing  |  51  |Mouser [[http://www.mouser.com/search/refine.aspx?Keyword=810-FK24X5R1C106K|810-FK24X5R1C106K]] \\  Note: Can be replaced with tantalum or electrolytic capacitors  |
|  Capacitor  |  C52  |1 uF ceramic, 5.08 mm lead spacing  |  1  |Mouser [[https://www.mouser.com/Search/ProductDetail.aspx?R=FK24X7R1C105Kvirtualkey52130000virtualkey810-FK24X7R1C105K|810-FK24X7R1C105K]] \\  Note: Can be replaced with tantalum or electrolytic capacitors  |
|  Capacitor  |  C53 - C59  |0.1 uF ceramic, 5.08 mm lead spacing|  7  |Mouser [[http://www.mouser.com/search/refine.aspx?Keyword=810-FK28X7R1H104K|810-FK28X7R1H104K]], [[http://www.mouser.com/ProductDetail/Kemet/C323C104K5R5TA/?qs=sGAEpiMZZMuAYrNc52CMZJc2YQhHPlYVWR1uyzMGvKQ=|80-C323C104K5R]] \\  Jameco [[http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_25523_-1|25523]]|
|  Connector  |  BUS1 - BUS8  |ISA Edge connector, 98 pin|  8  |Mouser [[http://www.mouser.com/ProductDetail/EDAC/395-098-520-350/?qs=sGAEpiMZZMutB6RuyXJB1NbKoTYpZpybbN89FoJtbcI=|587-395-098-520-350]]|
|  Connector  |  J1 - J4  |3×1 pin header|  4  |Mouser [[http://www.mouser.com/ProductDetail/FCI/69190-103HLF/?qs=sGAEpiMZZMvlX3nhDDO4AIYfP1TbgJhjYISz3bCP/wo=|649-69190-103HLF]], [[http://www.mouser.com/ProductDetail/Amphenol-FCI/78229-103HLF/|649-78229-103HLF]] \\  Jameco [[http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_109576_-1|109576]]  |
|  Connector  |  P1, P2, P6, P7  |2×1 pin header  |  4  |Mouser [[http://www.mouser.com/ProductDetail/Amphenol-FCI/78229-102HLF/|649-78229-102HLF]] \\  Jameco [[http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_108338_-1|108338]]  |
|  Connector  |  P3  |ATX power connector  |  1  |Mouser [[http://www.mouser.com/ProductDetail/Molex/46015-2006/?qs=sGAEpiMZZMsYFFs3UyUR4/ZNapbMTqpmUbP4rdVhYF4=|538-46015-2006]] \\  Jameco (was 365149)  |
|  Connector  |  P4  |5×2 pin header  |  1  |Mouser [[http://www.mouser.com/search/refine.aspx?Keyword=649-68602-110HLF|649-68602-110HLF]]  |
|  Connector  |  P5  |DE9M, right angle PCB mount  |  1  |Mouser [[http://www.mouser.com/ProductDetail/Kycon/K22X-E9P-N-99/|806-K22X-E9P-N-99]] (teal color), [[http://www.mouser.com/ProductDetail/Kycon/K22X-E9P-N/?qs=sGAEpiMZZMu857ZbtCGHt0PbUrjjd/NBm0naypBlx9c=|806-K22X-E9P-N]], [[http://www.mouser.com/ProductDetail/TE-Connectivity-AMP/747840-4/?qs=sGAEpiMZZMu857ZbtCGHtwpRvUYYjR/b0tNi/PWGuJ4=|571-7478404]] \\  Jameco [[http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_104943_-1|104943]], [[http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_614441_-1|614441]], [[http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_614459_-1|614459]], [[http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_614432_-1|614432]]  |
|  Diode  |  D6, D7  |1N4148  |  2  |Mouser [[http://www.mouser.com/ProductDetail/Fairchild-Semiconductor/1N4148/?qs=sGAEpiMZZMutXGli8Ay4kC4Bz7vbB60woGEFXf9TQ98=|512-1N4148]], [[http://www.mouser.com/ProductDetail/NXP-Semiconductors/1N4148143/|771-1N4148,143]] \\  Jameco [[http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_36038_-1|36038]], [[http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_179215_-1|179215]]  |
|  LED  |  D1 - D5  |5 mm LED  |  5  |Mouser: Search for T-1 3/4 LED lamps \\ Jameco [[https://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_790225_-1|790225]] (red, diffused), [[https://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_107393_-1|107393]] (orange, diffused), [[https://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_697549_-1|697549]] (yellow, diffused), [[https://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_697531_-1|697531]](green, diffused), [[http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_138691_-1|138691]] (blue, diffused) \\  Note: Use different colors for a nicer look {{https://retrobrewcomputers.org/lib/images/smileys/icon_smile.gif?nolink&}}  |
|  LED Display  |  S1  |2 digit 7-segment LED display,**0.56" character height**, 18 pin, 15.24 mm (0.6" between pin rows)  |  1  |Mouser [[http://www.mouser.com/ProductDetail/Kingbright/DC56-11YWA/|604-DC56-11YWA]]  (common cathode Red) \\ Jameco [[http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?productId=24707|24707]] (common cathode, orange), search for more options \\  Note: Pick either common cathode type or common anode type according to the decoder IC you're planning to use. \\   |
|  Resistor  |  R1, R2  |10 kOhm, 1/4 W  |  2  |Mouser [[http://www.mouser.com/ProductDetail/Xicon/291-10K-RC/?qs=sGAEpiMZZMu61qfTUdNhG6xwTrVwTvbz8PPav3aExs8=|291-10K-RC]] \\  Jameco [[http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_691104_-1|691104]]  |
|  Resistor  |  R3, R4  |1.5 kOhm, 1/4 W  |  2  |Mouser [[http://www.mouser.com/search/refine.aspx?Keyword=291-1.5K-RC|291-1.5K-RC]]  |
|  Resistor  |  R5, R6  |1 kOhm, 1/4 W  |  2  |Mouser [[https://www.mouser.com/Search/ProductDetail.aspx?R=291-1K-RCvirtualkey21980000virtualkey291-1K-RC|291-1K-RC]]  |
|  Resistor  |  R7 - R11  |470 Ohm, 1/4 W|  5  |Mouser [[http://www.mouser.com/ProductDetail/Xicon/291-470-RC/?qs=sGAEpiMZZMu61qfTUdNhG1AdbDi3ermZfsjMZ8nKiDY=|291-470-RC]] \\  Jameco [[http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_690785_-1|690785]]  |
|  Resistor Array  |  RR1, RR2  |470 Ohm, 16 pin DIP, isolated resistor array  |  2  |Mouser: [[http://www.mouser.com/search/refine.aspx?Keyword=652-4116R-1LF-470|652-4116R-1LF-470]] \\  Note: Can be replaced with 16 x 470 Ohm resistors|
|  Trimmer Resistor  |  RV1  |50 kOhm  |  1  |Mouser: [[http://www.mouser.com/search/refine.aspx?Keyword=652-3362P-1-503LF|652-3362P-1-503LF]] \\  Note: This trimmer is only needed if using D346D or D347D decoders (U1, U2)  |
|  Switch  |  SW1,SW2  |6mm Tactile Switch  |  2  |Mouser: [[http://www.mouser.com/search/refine.aspx?Keyword=653-B3F-1000|653-B3F-1000]]  |
|  IC  |  U1, U2  |7 segment decoder|  2  |**Note:** Please refer to the table below for proper decoder/display configuration \\   \\ **74HCT4511/74HC4511 (common cathode):** \\ Mouser: [[http://www.mouser.com/ProductDetail/NXP-Semiconductors/74HCT4511N652/?qs=sGAEpiMZZMtxONTBFIcRfsgCRr8SlzJ/v9c1RKycpkg=|771-HCT4511N652]], [[http://www.mouser.com/ProductDetail/Texas-Instruments/CD74HCT4511EE4/?qs=sGAEpiMZZMtxONTBFIcRfsIzUmYcFeADsLq9FLi3t1Q=|595-CD74HCT4511EE4]], [[http://www.mouser.com/ProductDetail/Texas-Instruments/CD74HCT4511E/?qs=sGAEpiMZZMtxONTBFIcRfmuVO38W6FditljVf/N0/CY=|595-CD74HCT4511E]], [[http://www.mouser.com/ProductDetail/NXP-Semiconductors/74HC4511N652/?qs=sGAEpiMZZMtxONTBFIcRfsgCRr8SlzJ/DnNUmeT3Fxk=|771-74HC4511N]], [[http://www.mouser.com/ProductDetail/Texas-Instruments/CD74HC4511EE4/?qs=sGAEpiMZZMtxONTBFIcRfsIzUmYcFeADqw85VHFmjiI=|595-CD74HC4511EE4]] \\   \\  **CD4511 (common cathode):** \\ Mouser: [[http://www.mouser.com/ProductDetail/Texas-Instruments/CD4511BE/|595-CD4511BE]], [[http://www.mouser.com/ProductDetail/Texas-Instruments/CD4511BEE4/?qs=sGAEpiMZZMtxONTBFIcRfmImiJSTF7Eu2Szbpruav6E=|595-CD4511BEE4]] \\  Jameco: [[http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_13493_-1|13493]], [[http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_895377_-1|895377]] \\   \\  **74LS47 (common anode):** \\ Mouser: [[http://www.mouser.com/ProductDetail/Texas-Instruments/SN74LS47NE4/|595-SN74LS47NE4]], [[http://www.mouser.com/ProductDetail/Texas-Instruments/SN74LS47N/?qs=sGAEpiMZZMtYFXwiBRPs05jHvQJpC1NM|595-SN74LS47N]] \\  Jameco: [[http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_47790_-1|47790]], [[http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_295582_-1|295582]]; Unicorn electronics \\   \\  **74LS247 (common anode, similar to 74LS47, but 6 and 9 with tails):** \\ Mouser: [[http://www.mouser.com/ProductDetail/Texas-Instruments/SN74LS247NE4/|595-SN74LS247NE4]], [[http://www.mouser.com/ProductDetail/Texas-Instruments/SN74LS247N/?qs=sGAEpiMZZMtYFXwiBRPs0xtEwd4dfjJ2|595-SN74LS247N]] \\  Jameco: [[http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_47247_-1|47247]] \\   \\  **74LS48 (common cathode):** \\ Jameco: [[http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_47811_-1|47811]] \\   \\  **DM9368 (common cathode):** \\ [[http://www.intertexelectronics.com/IC-DM9368PC-DM9368-IC-Decoder-Driver-Latch-7-segment-Led-P4388.aspx|Intertex Electronics]], or eBay \\   \\  **D346D (common anode):** Ask your European friend {{https://retrobrewcomputers.org/lib/images/smileys/icon_smile.gif?nolink&}}  |
|  IC  |  U3  |74LS688  |  1  |Mouser: [[http://www.mouser.com/ProductDetail/Texas-Instruments/CD74HCT688E/|595-CD74HCT688E]], [[http://www.mouser.com/ProductDetail/NXP-Semiconductors/74HCT688N652/?qs=sGAEpiMZZMuS/mO2LfY7hvCkLZa9u8TqMH/tjYLL9Xs=|771-74HCT688N]], [[http://www.mouser.com/ProductDetail/Texas-Instruments/SN74LS688N/| 595-SN74LS688N]]  |
|  IC  |  U4  |74LS574  |  1  |Mouser: [[http://www.mouser.com/ProductDetail/Texas-Instruments/SN74HCT574N/|595-SN74HCT574N]], [[http://www.mouser.com/ProductDetail/Texas-Instruments/SN74ALS574BN/|595-SN74ALS574BN]], [[http://www.mouser.com/ProductDetail/Texas-Instruments/SN74F574N/|595-SN74F574N]]  |
|  IC  |  U5  |74HCT74  |  1  |Mouser: [[http://www.mouser.com/ProductDetail/NXP-Semiconductors/74HCT74N652/|771-74HCT74N]], [[http://www.mouser.com/ProductDetail/Texas-Instruments/SN74HCT74N/|595-SN74HCT74N]], [[http://www.mouser.com/ProductDetail/Texas-Instruments/SN74HCT74NE4/|595-SN74HCT74NE4]], [[http://www.mouser.com/ProductDetail/Texas-Instruments/CD74HCT74E/|595-CD74HCT74E]]  |
|  IC  |  U6  |74LS32  |  1  |Mouser: [[http://www.mouser.com/ProductDetail/Texas-Instruments/SN74ALS32N/|595-SN74ALS32N]]  |
|  IC  |  U7  |74HCT14|  1  |Mouser: [[http://www.mouser.com/ProductDetail/Texas-Instruments/SN74AHCT14N/|595-SN74AHCT14N]], [[http://www.mouser.com/ProductDetail/Texas-Instruments/SN74HCT14NE4/|595-SN74HCT14NE4]], [[http://www.mouser.com/ProductDetail/Texas-Instruments/SN74HCT14N/|595-SN74HCT14N]], [[http://www.mouser.com/ProductDetail/Texas-Instruments/CD74HCT14E/|595-CD74HCT14E]]  |
|  IC  |  U8  |7905  |  1  |Mouser: [[http://www.mouser.com/search/refine.aspx?Keyword=512-LM7905CT|512-LM7905CT]] \\  Note: This IC is optional, and only required if you need -5V voltage, but your ATX power supply doesn't provide it.  |
|  IC Socket  |  U5, U6, U7  |14 pin 300 mil DIP socket  |  3  |Mouser [[http://www.mouser.com/ProductDetail/3M-Electronic-Solutions-Division/4814-3000-CP/?qs=sGAEpiMZZMs/Sh/kjph1tvt1/mEPT/Xolv7TyDO1KrY=|517-4814-3000-CP]], [[http://www.mouser.com/ProductDetail/FCI/DILB14P-223TLF/?qs=sGAEpiMZZMs/Sh/kjph1tvt1/mEPT/XoudDvhlAH3XM=|649-DILB14P-223TLF]] \\  Jameco [[http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_37162_-1|37162]]  |
|  IC Socket  |  U1, U2  |16 pin 300 mil DIP socket  |  2  |Mouser [[http://www.mouser.com/ProductDetail/3M-Electronic-Solutions-Division/4816-3000-CP/?qs=sGAEpiMZZMs/Sh/kjph1tvt1/mEPT/Xo2MaLGaLrmns=|517-4816-3000-CP]], [[http://www.mouser.com/ProductDetail/FCI/DILB16P-223TLF/?qs=sGAEpiMZZMs/Sh/kjph1tnWBa37eU7kEZ8uy8DVlop0=|649-DILB16P-223TLF]] \\  Jameco [[http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_37373_-1|37373]]  |
|  IC Socket  |  U3, U4  |20 pin 300 mil DIP socket  |  2  |Mouser [[http://www.mouser.com/ProductDetail/FCI/DILB20P-223TLF/?qs=sGAEpiMZZMs/Sh/kjph1tqkewsuxcQXGl93XoFG0NGQ=|649-DILB20P-223TLF]], [[http://www.mouser.com/ProductDetail/3M-Electronic-Solutions-Division/4820-3000-CP/?qs=sGAEpiMZZMs/Sh/kjph1tvt1/mEPT/XoGLwqMMa088g=|517-4820-3000-CP]] \\  Jameco [[http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_112248_-1|112248]]  |

\\


==== 7-Segment Decoders and Matching Displays ====
The ISA Backplane board supports a variety of 7-segment decoders and common anode / common cathode type LED displays. Please use the following table to determine the proper configuration.

^7-Segment Decoder Type  ^Hexadecimal Support  ^Matching Display Type  ^  J2  ^  J3  ^  J4  ^  Built in current limiters<sup>1</sup>  |
|74LS47, 74LS247  |Limited - Displays distinct figures for codes A-F  |Common anode  |  2-3  |  2-3  |  2-3  |No  |
|74LS48, 74LS248  |Limited - Displays distinct figures for codes A-F  |Common cathode  |  1-2  |  2-3  |  2-3  |No  | 
|CD4511, MC14511, 74HCT4511  |No - Displays nothing (blank) for codes A-F  |Common cathode  |  1-2  |  2-3  |  1-2 |No  |
|Mitel MD4311BE  |Yes  |Common cathode  |  1-2  |  2-3  |  1-2  |No  |
|DM9368  |Yes  |Common cathode  |  1-2  |  1-2  |  2-3  |Yes  |
|DM9370  |Yes  |Common anode  |  2-3  |  1-2  |  2-3  |No  |
|DM9374	 |Limited - Displays distinct figures for codes A-F  |Common anode  |  2-3  |  1-2  |  2-3  |Yes  |
|D345D  |Yes  |Common anode  |  2-3  |  1-2  |  2-3  |No  |
|D346D  |Yes  |Common anode  |  2-3  |  Trim<sup>2</sup>  |  2-3  |Yes  |
|D347D  |Limited - Displays distinct figures for codes A-F  |Common anode  |  2-3  |  1-2  |  2-3  |No  |
|D348D  |Limited - Displays distinct figures for codes A-F  |Common anode  |  2-3  |  Trim<sup>2</sup>  |  2-3  |Yes  |

  - No need for current limiting resistor arrays (RR1, RR2), two 470 Ohm resistors should be used to limit current for the decimal point segment.These resistors should be installed between pins 8 and 9 of RR1 and RR2. \\
  - For decoders D346D and D348D the RV1 trimmer should be installed instead of the J3. This trimmer is used to adjust the intensity of the LED display.


==== Replacement Notes ====

  * It is recommended to use CMOS parts (74HCT, 74AHCT) for U5 and U7
  * Other logic can be from any TTL compatible series (74AHCT, 74HCT, 74LS, 74ALS, 74F).

===== Photo Gallery =====
{{gallery>photos?&0  }}

===== File List =====
{{filelist>*&style=table&tableheader=1&tableshowdate=1&tableshowsize=1}}