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PC-BSD: The Most Beginner Friendly OS
soniyea writes "OSWeekly.com reviews PC-BSD and considers it the most beginner friendly OS in the market. 'From PC-BSD's roadmap to their default installation, I honestly feel good about where these guys are headed with their take on FreeBSD. This operating system has it all: support both from the professional level as well as that of the community, the ability to install Linux software, thanks to the binary compatibility layer, and of course — speed. Understand for most people, the speed factor is more or less a matter of opinion. But I have found that in some areas, it felt faster at the core level. Maybe I just had too much coffee that day? Either way, I totally recommend PC-BSD for anyone wanting to take a step into the wild side. FreeBSD, it's not just for geeks anymore.'"
The article is of very poor quality. It doesn't even provide a link to the PC-BSD website.
... when you plug in your scanner, printer, digital camera, mobile phone, PDA, dvcam .. and it just works. When you don't need to even figure what program would possibly deal with such devices to start with.
Maybe they should do a test... 20 beginners with no computer experience or familiarity, that would use this operating system, and e.g. Mac OS X, plain installed FreeBSD and XP, and see what they think is really the easiest to use. The beginners would be way better to tell this than someone who makes their living writing computer related articles.
The 6502's "zero page" instructions were a timesaver. Most instructions had a "shorthand" form which accessed a byte in the address space $0000-$00FF, using only one byte for the operand address, so saving a clock cycle and a byte of RAM. You could use zero page memory as an extended register set. If you were very clever, you could pull stunts with mapping different 256-byte chunks of memory into that space. Or you could use those addresses for faster-than-usual I/O {like the Atari 2600}. {The 6502 did not have separate I/O and memory buses.}
The BBC microcomputer used the 6502 {actually the 65C102 in its later incarnations} and that had an absolutely amazing BASIC. Even ran faster than some rival computers' machine code {thanks mostly to the use of hardware rather than software to generate the bitmapped display, which required up to 20KB of the 32KB for the framebuffer}.
The 6502, and the way the BBC used it, was also the inspiration for the ARM processor. SWIs were based on the BBC's MOS {kind of a BIOS on steroids; a full abstraction layer}. Basically, in order to access the BBC's hardware, you would set up a parameter block in memory; load its address into the X and Y registers and an instruction code into the accumulator; and call a fixed address in ROM {which pointed to an indirect jump instruction deriving its address from RAM, allowing user code to intercept MOS calls if necessary. You could have hours of fun with this}. If you only needed to pass two bytes and an instruction code then you could use the X and Y registers and call a different address. {I know, nowadays we pass parameters on the stack. This was the 1980s. Also, the 6502's hardware stack can only ever be 256 bytes big due to the S register -- the stack pointer -- being only 8 bits wide.} The whole display subsystem {including text, graphics, user-defined characters, display windows and colour/palette selection} was controlled by non-printable characters {and the graphics display was organised as 1280x1024, even though in real life it was only 160/320/640x256}. There was, of course, a MOS call to print a character. Every other piece of hardware -- the sound system, the keyboard, the printer, the serial port, the A-to-D converter, the cassette and disc file systems -- could be accessed through MOS calls. You didn't have to touch the hardware directly at all; in fact, as long as you didn't, the same programs {in BASIC or machine code} would work without modification on a plain Model B, a B with a 6502 second processor, a Master Series or a RISC-based machine with 6502 emulation. BBC BASIC was merely a layer on top of the MOS. For instance, the Beeb's sound chip had a programmable envelope generator controlled by 14 parameters. There was a MOS call which took a block of 14 parameters and loaded these into the sound chip's registers. The ENVELOPE statement in BASIC took 14 parameters, and merely made the MOS call for you.
Je fume. Tu fumes. Nous fûmes!