check now
| 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. |
| MAP: | Hello, I/O control? I need the data from location 76543. |
| I/O: | Just a moment, I'll try to get it. |
| I/O: | 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 will be stored at location 556. Would you get me the data at 556? |
| I/O: | I'll try. |
| I/O: | 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. |
| I/O: | 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 get me that data? |
| I/O: | (sigh) I'll try. |
| I/O: | 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... |
*Thanks to S. Foonly, Artificial Intelligence Laboratory, Stanford University, Stanford CA.
Back the DEC 36-bit computer page
Last updated July 22, 2002
Web page copyright 2002 Eric Smith