82 lines
2.7 KiB
Plaintext
82 lines
2.7 KiB
Plaintext
Path: ns-mx!uunet!jarthur!usc!wuarchive!cs.utexas.edu!asuvax!noao!rutgers!att!cbnewsd!dcn
|
|
From: dcn@cbnewsd.ATT.COM (david.c.newkirk)
|
|
Newsgroups: alt.folklore.computers
|
|
Subject: How Virtual Memory Really Works (or Doesn't Work...)
|
|
Keywords: I/O Deja Vu from old Creative Computing
|
|
Message-ID: <14498@cbnewsd.ATT.COM>
|
|
Date: 4 May 90 14:06:04 GMT
|
|
Organization: AT&T Bell Laboratories
|
|
Lines: 71
|
|
|
|
The recent posting about the Thing King reminded me of a similar parody in
|
|
an old Creative Computing magazine - enjoy!
|
|
|
|
|
|
I/O Deja Vu - A Farce in One Act
|
|
--------------------------------
|
|
|
|
IBOX: Hello, CACHE? I'd like the data for location 54321.
|
|
|
|
CACHE: I'm sorry sir. I don't have that data. Just a moment and I'll
|
|
try to get it for you.
|
|
|
|
CACHE: Hello, MAP? I need the address for location 54321.
|
|
|
|
MAP: I don't have that address, sir. That address is stored at location
|
|
76543. Just a moment and I'll try to get it for you. Hello, I/O
|
|
control? I need the data from location 76543.
|
|
|
|
I/O: Just a moment. I'll try to get it. Hello, CACHE? I need the data
|
|
from location 76543.
|
|
|
|
CACHE: I don't seem to have that data, and I'm not about to get it.
|
|
|
|
I/O: Hello, MAP? What is the address for location 76543?
|
|
|
|
MAP: That address is 222543.
|
|
|
|
I/O: Hello, CORE? What is the data at 222543?
|
|
|
|
CORE: That data is INDIRECT PAGE TABLE 21, PAGE 44.
|
|
|
|
I/O: Hello, MAP? That data you wanted is INDIRECT PAGE TABLE 21, PAGE 44.
|
|
|
|
MAP: Fine. Now I need INDIRECT PAGE TABLE ENTRY 21. That would be
|
|
stored at location 556. Would you get me the data at 556?
|
|
|
|
I/O: I'll try. Hello, CACHE? I need the data from location 556.
|
|
|
|
CACHE: That data is 6767.
|
|
|
|
I/O: Hello, MAP? That data you wanted is 6767.
|
|
|
|
MAP: Good. Now, let's see. 6767 plus 44 is 7033. Now, get me the data
|
|
at 7033.
|
|
|
|
I/O: Hold on. Hello, CACHE? I need the data from location 7033.
|
|
|
|
CACHE: I'm sorry. I don't have that data. You'll have to get it from CORE.
|
|
|
|
I/O: Hello, MAP? I need the address for location 7033.
|
|
|
|
MAP: I'm sorry. I don't seem to have that address. I'll try to get it,
|
|
but I'll probably forget what I was doing before, so you might as
|
|
well too.
|
|
|
|
MAP: Hello, I/O? I'm trying to get the address for 7033. That data should
|
|
be stored at location 112233. Would you try to get me that data?
|
|
|
|
I/O: (sigh) I'll try. Hello, CACHE? I need the data from location 112233.
|
|
|
|
CACHE: That data is 4242.
|
|
|
|
I/O: Hello, MAP? That data you wanted is 4242.
|
|
|
|
MAP: I'll store that away. HEY IBOX, I just stored something.
|
|
|
|
IBOX: Hello, CACHE? I'd like the data for location 54321.
|
|
|
|
CACHE: I'm sorry sir. I don't have that data. Just a moment and I'll try...
|
|
--
|
|
Dave Newkirk, att!ihlpm!dcn
|
|
|