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| *Now talking on #techbytes | Feb 28 01:54 | |
| *Topic for #techbytes is: Welcome to the official channel of the TechBytes Audiocast | Feb 28 01:54 | |
| *Topic for #techbytes set by schestowitz!~roy@haii6za73zabc.irc at Tue Jun 1 20:21:34 2021 | Feb 28 01:54 | |
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| schestowitz[TR2] | <li> | Feb 28 08:27 |
|---|---|---|
| schestowitz[TR2] | <h5><a href="https://www.tomshardware.com/pc-components/cpus/india-continues-to-innovate-homegrown-risc-v-launches-aries-30-board-with-an-onboard-vega-et1031-cpu">India continues to innovate homegrown RISC-V, launches Aries 3.0 board with an onboard Vega ET1031 CPU</a></h5> | Feb 28 08:27 |
| schestowitz[TR2] | <blockquote> | Feb 28 08:27 |
| schestowitz[TR2] | <p>Now, let's talk about those specs. The CPU is 32-bit and operates at up to 100 MHz, using only 256 KB of SRAM. This doesn't come close to competing with modern Raspberry Pi solutions, but will probably be more than enough for the intended applications in IoT, toys, and so on. Some devices only need the most basic of processing. </p> | Feb 28 08:27 |
| schestowitz[TR2] | </blockquote> | Feb 28 08:27 |
| schestowitz[TR2] | </li> | Feb 28 08:27 |
| -TechBytesBot/#techbytes-www.tomshardware.com | India continues to innovate homegrown RISC-V, launches Aries 3.0 board with an onboard Vega ET1031 CPU | Tom's Hardware | Feb 28 08:27 | |
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| schestowitz[TR2] | 13:03 < Sompi_> Now I also noticed that on some BIOSes the boot drive number is randomly sometimes 0x80 and sometimes | Feb 28 10:03 |
| schestowitz[TR2] | 0x00 when booted from a USB storage stick. The number seems to be consistently the same for the same USB | Feb 28 10:03 |
| schestowitz[TR2] | stick and BIOS but otherwise seemingly random | Feb 28 10:03 |
| schestowitz[TR2] | 13:04 < Sompi_> It is a problem, because if the boot driver number is 0x00, the kernel assumes that it is booted from a | Feb 28 10:03 |
| schestowitz[TR2] | floppy, and does not even try using LBA or detecting the disk geometry using int13,8. Then it tries to | Feb 28 10:03 |
| schestowitz[TR2] | use the geometry in the FAT boot sector that of course does not work, because it is not the real geometry | Feb 28 10:03 |
| schestowitz[TR2] | for the USB stick. | Feb 28 10:03 |
| schestowitz[TR2] | 13:05 < Sompi_> How the hell do I fix that... | Feb 28 10:03 |
| schestowitz[TR2] | 13:06 < Sompi_> How can the USB booting be so broken on so many modern BIOSes | Feb 28 10:03 |
| schestowitz[TR2] | 13:07 < Sompi_> Those BIOSes just randomly decide to assign drive number 0x00 for some USB sticks, and number 0x80 for | Feb 28 10:03 |
| schestowitz[TR2] | some others | Feb 28 10:03 |
| schestowitz[TR2] | 13:07 < Sompi_> And according to the BIOS specification 0x00 should ONLY be used for floppy drive 0 | Feb 28 10:03 |
| schestowitz[TR2] | 13:18 < Sompi_> And because floppies are soft sectores and the BIOS doesn't know anything about their geometry, the | Feb 28 10:03 |
| schestowitz[TR2] | kernel has to work differently with them than it does with hard drives | Feb 28 10:03 |
| schestowitz[TR2] | 13:37 < Sompi_> And also those BIOSes often report that the computer has one (1) floppy drive, when in reality it has | Feb 28 10:03 |
| schestowitz[TR2] | none, and that breaks even more things | Feb 28 10:03 |
| schestowitz[TR2] | 13:42 < Sompi_> So: The BIOS reports that the computer has a floppy drive, when in reality it doesn't. The BIOS also | Feb 28 10:03 |
| schestowitz[TR2] | assigns drive number 0x00 to the USB drive that it's booting from. How should the kernel know that the | Feb 28 10:03 |
| schestowitz[TR2] | drive 0x00 is NOT the floppy drive that actually doesn't even exist, but instead a USB storage device | Feb 28 10:03 |
| schestowitz[TR2] | that has a hard-coded geometry that must be determined with BIOS int13,ah=8? | Feb 28 10:03 |
| schestowitz[TR2] | 13:42 < Sompi_> ACPI is not a solution, because it is also utterly broken on many implementations | Feb 28 10:03 |
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| schestowitz[TR2] | > Hi Roy, hope all goes well with you. Your RSS should be | Feb 28 10:38 |
| schestowitz[TR2] | > picking up four new blog posts onhttps://cybershow.uk/blog/ | Feb 28 10:38 |
| schestowitz[TR2] | Thanks, | Feb 28 10:38 |
| schestowitz[TR2] | those will go into the next batch of Daily Links in techrights (later this morning). | Feb 28 10:38 |
| schestowitz[TR2] | Is our new site penetration-viable? | Feb 28 10:38 |
| schestowitz[TR2] | Regards, | Feb 28 10:38 |
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