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#1
June 17th 10, 02:08 PM
posted to comp.sys.ibm.pc.hardware.chips
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IBM PC AT missing PALs
Maybe this is oftoppic, but i confess, that don't know a place
anymore, where i can ask about this...I have an vintage American Research Corp. 286 (a grate treasure for understanding the hardware part of PC) mobo whith empty DIP sockets for an N82S147 ROM, and 16L8A PALs, in spite of that mobo is a clone of original IBM, i think, that it's schematic is mutch close, and the PALs from IBM can work in this mobo.Maybe sombody have a reference manual for the IBM AT where the time diagrams of signals is illustrated.Hopefully it help me to disclouse the structure of PLAs, or somebody can share the dumps with me. Help me please.. 
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#2
June 18th 10, 06:21 PM
posted to comp.sys.ibm.pc.hardware.chips
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IBM PC AT missing PALs
On Thu, 17 Jun 2010 06:08:20 -0700 (PDT), vadim
wrote: Maybe this is oftoppic, but i confess, that don't know a place anymore, where i can ask about this...I have an vintage American Research Corp. 286 (a grate treasure for understanding the hardware part of PC) mobo whith empty DIP sockets for an N82S147 ROM, and 16L8A PALs, in spite of that mobo is a clone of original IBM, i think, that it's schematic is mutch close, and the PALs from IBM can work in this mobo.Maybe sombody have a reference manual for the IBM AT where the time diagrams of signals is illustrated.Hopefully it help me to disclouse the structure of PLAs, or somebody can share the dumps with me. Help me please.. Try to ask the people he http://www.vintage-computer.com/vcforum/forum.php
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#3
June 27th 10, 01:56 AM
posted to comp.sys.ibm.pc.hardware.chips
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IBM PC AT missing PALs
On Thu, 17 Jun 2010 06:08:20 -0700 (PDT), vadim
put finger to keyboard and composed: Maybe this is oftoppic, but i confess, that don't know a place anymore, where i can ask about this...I have an vintage American Research Corp. 286 (a grate treasure for understanding the hardware part of PC) mobo whith empty DIP sockets for an N82S147 ROM, and 16L8A PALs, in spite of that mobo is a clone of original IBM, i think, that it's schematic is mutch close, and the PALs from IBM can work in this mobo.Maybe sombody have a reference manual for the IBM AT where the time diagrams of signals is illustrated.Hopefully it help me to disclouse the structure of PLAs, or somebody can share the dumps with me. Help me please.. I have the Technical Reference Manual for the IBM PC AT. There are circuits, but no timing diagrams. I can scan them if you think they will help. - Franc Zabkar -- Please remove one 'i' from my address when replying by email.
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