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ABB E3ED  模擬控制站  自動(dòng)化系統(tǒng)模塊

The E3ED operating system has memory areas pinned (never swapped to secondary storage). Other terms used are locked, fixed; Constant, or wired, number of pages. For example, an interrupt mechanism relies on an array of Pointers to its handlers, such as input-output completion and page errors. If the pages containing these Pointers or the code they invoke are pageable, interrupt handling becomes more complex and time-consuming, especially in the case of page error interrupts. Therefore, some parts of the page table structure are not pageable.

E3ED Some pages may be fixed for a short time, some pages may be fixed for a long time, and some pages may need to be fixed permanently. For example:

The paging manager code and drivers for the secondary storage device where the page resides must be permanently fixed, or the paging will not even work because the necessary code is not available.

Timing dependent components can be fixed to avoid variable paging delays.

Data buffers are accessed directly by peripherals in use or I/O channels must reside on fixed pages because such devices and buses expect to find data buffers at physical memory addresses; If a page error occurs, the transmission cannot be stopped and then restarted after handling the page error, regardless of whether the bus has an input-output memory management unit. For example, data may come from a measurement sensor unit, and real-time data lost due to page errors cannot be recovered.

E3ED  在IBM的操作系統(tǒng)中系統(tǒng)/370和后繼系統(tǒng)中，該術(shù)語(yǔ)是“固定的”，并且這樣的頁(yè)面可以是長(zhǎng)期固定的，或者可以是短期固定的，或者可以是不固定的(即，可分頁(yè)的)。系統(tǒng)控制結(jié)構(gòu)通常是長(zhǎng)期固定的(以掛鐘時(shí)間計(jì)量，即以秒計(jì)量的時(shí)間，而不是以幾分之一秒計(jì)量的時(shí)間)，而I/O緩沖器通常是短期固定的(通常以遠(yuǎn)小于掛鐘的時(shí)間計(jì)量，可能是幾十毫秒)。實(shí)際上，操作系統(tǒng)有一個(gè)特殊的功能來(lái)“快速修復(fù)”這些短期固定的數(shù)據(jù)緩沖區(qū)(修復(fù)是在不花費(fèi)時(shí)間的情況下進(jìn)行的管理程序調(diào)用指令).

E3ED  使用了“有線”這個(gè)術(shù)語(yǔ)。OpenVMS和Windows操作系統(tǒng)將臨時(shí)變得不可分頁(yè)的頁(yè)面(如I/O緩沖區(qū))稱(chēng)為“鎖定的”，而將那些永遠(yuǎn)不可分頁(yè)的頁(yè)面簡(jiǎn)單地稱(chēng)為“不可分頁(yè)的”。這單一UNIX規(guī)范還在規(guī)范中使用術(shù)語(yǔ)“鎖定”姆洛克()，就像姆洛克() 手冊(cè)頁(yè)在許多方面類(lèi)Unix系統(tǒng)。

BB O3EGb HENF315118R2
ABB E3EP HENF315276R1

ABB E3ED
ABB O3EHa HENF315087R2
ABB O3EC HENF442581R1
ABB P5EAa HENF206350R2
ABB G3ENa HENF450268R2
ABB INICT01 
ABB NTLS01  
ABB NTR002-A
ABB NIMP01
ABB IISAC01
ABB P3EB HENF315223R1
ABB O3EX HENF315845R2
ABB P3EDb HENF452778R1
ABB E3ES
ABB B3EA HENF315147R1
ABB P3EA HENF315216R1
ABB NWX511a-2/R HESG112548R12
ABB P3ECa HENF315309R2
ABB O3EId HENF452777R3
ABB E5EAA HENF105240R1
ABB B5EEd HENF105082R4
ABB G3EFa HENF450295R2
ABB G3EB HENF315768R1
ABB G3FK HENF452878R1
ABB G3FCb HENF458568R1
ABB E3EFa HENF452750R1
ABB B5EC HENF105077R1