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Jun
24 |
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awarded | Supporter |
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Jun
24 |
|
awarded | Scholar |
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Jun
24 |
|
accepted | Unable to set permissions for power operations under Debian Bookworm |
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Jun
24 |
|
asked | Unable to set permissions for power operations under Debian Bookworm |
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May
7 |
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awarded | Revival |
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May
7 |
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comment |
What is this Terminal (or Micro) Actually the DS is a microcomputer, not a terminal. The keyboard seems to be placed on top of the control unit. About the memory, it's actually 128KB of work RAM + 1KB of system RAM + 2KB Video RAM. 2KB for character generation and 6KB? of monitor system ROM. |
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May
7 |
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revised |
What is this Terminal (or Micro) Removed typo |
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May
7 |
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answered | What is this Terminal (or Micro) |
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May
6 |
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comment |
Why do old computers (PCs) perform a long memory test on every boot? @supercat I don't know either, but I wrote the previous post in order to inform about the origin of the 16KB sized chunks in the tests. Actually the Datamaster had a 8203 DRAM controller in 16KB mode but it was dropped during the development of the PC, however. |
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May
6 |
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revised |
Why do old computers (PCs) perform a long memory test on every boot? The computer searches for RAM too. |
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May
6 |
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revised |
Why do old computers (PCs) perform a long memory test on every boot? Added link to video displaying process PID-1200 |
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May
6 |
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awarded | Critic |
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May
6 |
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revised |
What was the purpose of the “key” pin of the P8 connector of the IBM PC PSU, and why was it changed to +5V with the AT? added 261 characters in body |
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May
6 |
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answered | Why do old computers (PCs) perform a long memory test on every boot? |
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May
6 |
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answered | What was the purpose of the “key” pin of the P8 connector of the IBM PC PSU, and why was it changed to +5V with the AT? |
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Apr
23 |
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comment |
Why do old computers (PCs) perform a long memory test on every boot? @supercat Remember the IBM 5150 PC derives from the IBM 5322/5324 System/23 Datamaster, not only in much of its hardware but also inherited many of its programming logic, including tests. The Datamaster had 16KB memory pages of RAM, therefore it is logical to think if they modified a Datamaster to be used as a PC prototype to use the same memories and tests, althought the ones from a PC are simplified in comparison with the S/23, where literally everything is tested. |
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Apr
17 |
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comment |
What was the first PC-compatible computer to have a DRAM controller? Actually IBM engineers removed a dedicated dram controller (8203) when they transitioned from the Datamaster to the PC. I imagine they did so to lower costs. |
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Jan
11 |
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awarded | Yearling |
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Jan
11 |
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awarded | Yearling |
| 2023 | |||
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Sep
18 |
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awarded | Nice Question |