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Tuesday, November 25, 2008
DOS TSR
在DOS 系統下,由於只能單工作業,造成了種種限制。如果想要有多工能力,可以透過TSR(Terminate and Stay Resident) 達成,也就是常駐在記憶體中。像是doskey 這隻程式就是一個例子。TSR 可以掛在一個interrupt 上,等到interrupt 觸發時,就可以執行想做的事。TSR 是利用 dos int 31h system call 來達成。
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