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264 lines
13 KiB
Plaintext
264 lines
13 KiB
Plaintext
PAG
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===
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2007-08-21
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----------
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BECAUSE THE PAGER REPORTS SOFT ERRORS USING PI, IT CANNOT REPORT SOFT
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ERRORS THAT HAPPEN WHEN THE PROCESSOR IS RUNNING AT OR ABOVE THE PI
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LEVEL USED TO REPORT SOFT ERRORS. ITS WILL REPORT SOFT ERRORS AT CLKLEV
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(7), THE PAGER CANNOT REPORT SOFT ERRORS IN ANY PI HANDLER. THIS MEANS
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THAT THE "INTERRUPT IN A PI HANDLER" CASE AND THE "ERROR THAT HAPPENS
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BETWEEN THE START OF THE SOFT ERROR PI HANDLER AND THE PLACE WHERE THE
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SOFT ERROR HANDLER DOES THE DATAI TO SAVE THE STATUS" CASE ARE THE SAME.
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THE SYSTEM DOES NOT HANDLE THESE CASES GRACEFULLY. THE PAGER WILL
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CAPTURE THE STATUS, SEND THE SPECIAL SOFT ERROR STATUS BACK ON THE
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SYSTEM BUS TO TELL THE PROCESSOR TO FLUSH AND REPLAY, AND POST A PI. THE
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PI WILL BE IGNORED, SO THE INSTRUCTION REPLAY, FAIL AGAIN, AND THE
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PROCESS WILL REPEAT. THE PROCESSOR WILL BE STUCK IN A LIVE-LOCK,
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CONTINUOUSLY FETCHING, FAILING, AND REPLAYING THE OFFENDING INSTRUCTION.
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THE ONLY THING THAT CAN BE DONE IS PUSH THE "HLT" BUTTON (STOPPING THE
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PROCESSOR DEAD) OR PUSH THE "DDT" BUTTON (WHICH MAKES A LEVEL 1 PI,
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WHICH HAS A GOOD CHANCE OF GETTING THE SYSTEM INTO DDT, UNLESS WE ARE
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LIVE-LOCKED IN A LEVEL 1 PI HANDLER).
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THIS MIGHT SEEM UGLY, BUT REMEMBER THAT AN INFINITE INDIRECT ADDRESS
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LOOP IN A PI HANDLER CAN LIVE-LOCK THE MACHINE AS WELL.
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CONI PAG+0
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| |R|P|A|I| I |
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| |E|E|E|R| A |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3
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0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
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CONO PAG+0
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| |R|P|A| | I |
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| |E|E|E| | A |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3
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0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
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RE ROM ENABLE
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PE PAGING ENABLE
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AE AC REDIRECT ENABLE
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IR INTERRUPT REQUEST (REALLY JUST A COPY OF IR IN DATAI PAG+0)
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IA INTERRUPT CHANNEL ASSIGNMENT
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RE=1, PE=0, AE=0, IA=0 AT RESET (SET TO DO ROM FETCH FOR INITIAL PC = 20)
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RE ONLY DOES ANYTHING IF PE IS 0. IF RE IS 1 READS IN THE LOW 128KW OF
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THE ADDRESS SPACE GO TO ROM, AND WRITES IN THE LOW 128KW OF THE ADDRESS
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SPACE GET A HARD ERROR (THE HIGH 128KW IS NORMAL). IF RE IS 0 THEN THE
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WHOLE 128+128KW WORDS IS NORMAL). PUTTING THE ROM IN THE LOW END OF THE
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ADDRESS SPACE SEEMS BETTER FOR IMPLEMENTING DSKDMP.
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DATAI PAG+0
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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|I|U|W| P | | A |
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|R| | | | | |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3
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0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
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DATAO PAG+0
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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|I|U|W| P | | A |
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|R| | | | | |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3
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0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
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IR INTERRUPT REQUEST; SET TO 1 BY SE UNLESS XCTRI
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U SE IN USER MODE
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W SE ON WRITE
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P P FIELD FROM PTE THAT CAUSED THE SE
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A VA THAT CAUSED THE SE
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ALL FIELDS ARE SET TO 0 BY RESET
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DATAI PAG+1
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| | A | |
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| | R | |
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| | B | |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3
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0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
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DATAO PAG+1
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| | A | |
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| | R | |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3
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0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
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ARB AC REDIRECT BASE, PHYSICAL ADDRESS, 16-WORD ALIGNED
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ALL FIELDS ARE SET TO 0 BY RESET
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DATAI PAG+2
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| | T |
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| | M |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3
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0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
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DATAO PAG+2
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| | T |
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| | M |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3
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0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
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TMR TIME, INCREMENTS AT 4 US RATE IF NOT LEVEL 0
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ALL FIELDS ARE SET TO 0 BY RESET
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THE QUANTUM TIMER IS AN 18-BIT TIMER THAT INCREMENTS AT A 250 KHZ RATE
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(THAT IS, THE 16 MHZ MAIN CLOCK DIVIDED BY 64) ANY TIME THE PROCESSOR IS
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RUNNING AT LEVEL 0. IT DOES NOTHING BUT COUNT; THERE ARE NO INTERRUPTS
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OR ANYTHING LIKE THAT (THE QUANTUM TIMER IN THE SYSTEMS CONCEPTS ITS
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PAGING BOX FOR THE KA10 SEEMS TOM INCLUDE AN INTERRUPT, BUT ITS GOES TO
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SOME TROUBLE TO ARRANGE THAT THE INTERRUPT NEVER FIRES).
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THE QUANTUM TIMER IN THE SYSTEMS CONCEPTS ITS PAGING BOX FOR THE KA10 IS
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19 BITS WIDE AND INCREMENTS AT 1 MHZ, BUT THE FACT THAT IT INCREMENTS AT
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1 MHZ IS NEVER USED; ANY TIME ITS READS THE QUANTUM TIMER IT IMMEDIATELY
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SHIFTS THE VALUE IT READS RIGHT BY 2 BITS. THE PDP-10/X QUANTUM TIMER,
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WHICH INCREMENTS AT THE DESIRED 4 US RATE, IS ACTUALLY 1 BIT WIDER THAN
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IT NEEDS TO BE.
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PUTTING THE 18-BIT QUANTUM TIMER IN THE PAGER MIGHT SEEM A LITTLE
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STRANGE, BUT IT REALLY HAS MORE TO DO WITH ITS PAGING THAT WITH THE
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PROCESSOR (IT CERTAINLY IS NOT NEEDED IN A TOPS-10 MACHINE). THIS TIMER
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HAS TO INCREMENT AT LEVEL 0 TIME, SO THE SYSTEM BUS NEEDS A SIGNAL TO
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TELL THE PAGER THAT THE CPU IS AT LEVEL 0; FORTUNATELY THIS SIGNAL IS
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ONE THAT A FRONT PANEL WOULD LIKE AS WELL (FOR A "PI IN PROG" LED).
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DATAO PAG+3
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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|I|I|I| | V |
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|E|U|S| | A |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3
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0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
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IE INVALIDATE EXEC MODE
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IU INVALIDATE USER MODE
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IS INVALIDATE SINGLE TRANSLATION GIVEN VA, OTHERWISE ALL
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VA VIRTUAL ADDRESS TO INVALIDATE
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INVALIDATE ONE OR ALL ENTRIES IN THE PAGER'S CACHE. THE IE AND IU BITS
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DETERMINE IF THE EXEC SPACE AND/OR THE USER SPACE IS INVALIDATED. THE IS
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BIT DETERMINES IF ALL OF THE TRANSLATIONS SHOULD BE INVALIDATED (IS = 0)
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OR JUST THE TRANSLATION FOR THE VIRTUAL ADDRESS SPECIEIED BY THE VA
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FIELD (IS = 1).
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A SINGLE 1K PAGE AT LOCATION X CAN BE FLUSHED FROM BOTH THE EXEC MODE
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AND USER MODE ADDRESS SPACES (THAT IS, A CLRPT CAN BE DONE, ALBEIT ONE
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WITH 1K PAGES, WHICH IS WHAT ITS WANTS ANYWAY) WITH DATAO
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PAG+3,[700000,,X].
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DATAI PAG+4
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| | E | |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3
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0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
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DATAO PAG+4
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| | E | |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3
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0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
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ELB EXEC MODE LOSEG PT BASE, PHYSICAL ADDRESS, 64-WORD ALIGNED
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ALL FIELDS ARE SET TO 0 BY RESET
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DATAI PAG+5
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3
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0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
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DATAO PAG+5
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3
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0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
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EHB EXEC MODE HISEG PT BASE, PHYSICAL ADDRESS, 64-WORD ALIGNED
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ALL FIELDS ARE SET TO 0 BY RESET
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DATAI PAG+6
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| | U | |
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| | B | |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3
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0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
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DATAO PAG+6
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| | U | |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3
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0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
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ULB USER MODE LOSEG PT BASE, PHYSICAL ADDRESS, 64-WORD ALIGNED
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ALL FIELDS ARE SET TO 0 BY RESET
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DATAI PAG+7
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| | U | |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3
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0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
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DATAO PAG+7
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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| | U | |
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+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3
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0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
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UHB USER MODE HISEG PT BASE, PHYSICAL ADDRESS, 64-WORD ALIGNED
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ALL FIELDS ARE SET TO 0 BY RESET
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