H9270 backplane: Difference between revisions
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==External links== | ==External links== | ||
* [http://www.bitsavers.org/pdf/dec/qbus/ | * [http://www.bitsavers.org/pdf/dec/qbus/EB-20175-20_Digital_Microcomputer_Interfaces_Handbook_1980.pdf microcomputer interfaces handbook] - the H9270 is covered on pp. 425-430 (pp. 433-438 of the PDF) | ||
* [http://www.bitsavers.org/pdf/dec/qbus/ | * [http://www.bitsavers.org/pdf/dec/qbus/EB-26078-41_Digital_Microcomputer_Products_Handbook_1985.pdf Microcomputer Products Handbook] - the H9270-Q is covered in Chapter 59 (pp. 555-560 of the PDF) | ||
* [http://www.bitsavers.org/pdf/dec/pdp11/1103/EK-LSI11-TM-002.pdf LSI-11, PDP-11/03 user's manual] (EK-LSI11-TM-002) - the H9270 is covered in Section 11.7 (pp. 131-134 of the PDF) | * [http://www.bitsavers.org/pdf/dec/pdp11/1103/EK-LSI11-TM-002.pdf LSI-11, PDP-11/03 user's manual] (EK-LSI11-TM-002) - the H9270 is covered in Section 11.7 (pp. 131-134 of the PDF) | ||
* [http://www.bitsavers.org/pdf/dec/pdp11/1103/1103_Schematics.pdf PDP-11/03 Engineering Drawings] - the H9270 is covered on pp. 147-153 of the PDF | * [http://www.bitsavers.org/pdf/dec/pdp11/1103/1103_Schematics.pdf PDP-11/03 Engineering Drawings] - the H9270 is covered on pp. 147-153 of the PDF | ||
* [http://www.bitsavers.org/pdf/dec/qbus/EK-BA11N-UG-001_BA11-N_Mounting_Box_Users_Guide_Jan78.pdf BA11-N mounting box user's guide] (EK-BA11N-UG-001) - the H9270 is covered on pp. 10-11 | * [http://www.bitsavers.org/pdf/dec/qbus/BA11-N/EK-BA11N-UG-001_BA11-N_Mounting_Box_Users_Guide_Jan78.pdf BA11-N mounting box user's guide] (EK-BA11N-UG-001) - the H9270 is covered on pp. 10-11 | ||
[[Category: QBUS Backplanes]] | [[Category: QBUS Backplanes]] | ||
Latest revision as of 16:18, 9 October 2026
The H9270 backplane is a 4-slot Q/Q QBUS backplane, the standard backplane in the BA11-M mounting box. It could hold quad-sized cards.
It was a Q18 backplane, but it is relatively easy to upgrade it to Q22. A later variant, the H9270-Q, has jumpers which allow it to be configured for Q22 operation.
External links
- microcomputer interfaces handbook - the H9270 is covered on pp. 425-430 (pp. 433-438 of the PDF)
- Microcomputer Products Handbook - the H9270-Q is covered in Chapter 59 (pp. 555-560 of the PDF)
- LSI-11, PDP-11/03 user's manual (EK-LSI11-TM-002) - the H9270 is covered in Section 11.7 (pp. 131-134 of the PDF)
- PDP-11/03 Engineering Drawings - the H9270 is covered on pp. 147-153 of the PDF
- BA11-N mounting box user's guide (EK-BA11N-UG-001) - the H9270 is covered on pp. 10-11
