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Comment: Re:PLIP (Score 1) 424

by OrangeTide (#49144765) Attached to: Ask Slashdot: Old PC File Transfer Problem

You're off by a factor of 10, 115kbs is around 11500 bytes/second.

Ha! You're right. I was so intrigued with Google's calculator I forgot to check the basics. Trying again:

(160 Megabytes) / (11 520 (bytes / second)) = 3.85802469 hours

I think the checksum or CRC in the ZIP or RAR should be enough for him, it's going to be as good as whatever the firmware for that 160 MB harddrive uses, which is where the errors are most likely to occur. Xmodem and Zmodem are pretty good at detecting the common errors that occur over serial and modems, like truncation and dropped and duplicated bits.

SLIP and rsync would be the least effort solution to get you some good MD5 hash introduced in the transfer. If he has an Ethernet PCMCIA card then that would be even faster to transfer, but I sometimes getting networking and stuff up on an old computer takes close to 3.9 hours. ;)

Comment: Re:PLIP (Score 1) 424

by OrangeTide (#49143539) Attached to: Ask Slashdot: Old PC File Transfer Problem

LapLink lets you use the parallel port without having to configure TCP/IP stuff. It's raw bytes, more like a really fast null modem cable.

But why bother getting the right cables (I have some, easy to DIY, but you can't buy them off-the-shelf anymore) and software (some piracy required I imagine). Instead you can use RS232 at 115.2kbps. Google did the arithmetic and unit conversion for me:

160 Megabytes) / (1125 (bytes / second)) = 1.64609053 days

Zmodem is pretty slow, but ZedZap/8K-Zmodem is pretty quick and easy to find software that supports it for DOS, Win9x and Linux. If you do not require error detection and flow control, then Xmodem is fast. (recommend you use a null modem cable with flow control RTS/CTS wired, this is almost always wired correctly with off-the-shelf cables). Don't need a 16550 UART for this to work, an 8250 is adequate if you have flow control enabled.

I'd highly recommend you send ZIP files over your link rather than uncompressed data. If you have enough disk space free, you can use pkzip's multivolume support and archive the entire disk into several managable files. (rar's is even easier to use than pkzip's)

Comment: Re:Stationary bikes (Score 1) 249

by OrangeTide (#49140469) Attached to: I ride a bike ...

I don't have crank generators in my shed. It's mostly shovels and lawnmowers.

but my shed is weird, you'd be as likely to find a model airplane engine that can run on methanol/ethanol. Which is nice because you can make and distill ethanol if you're got a lot of time on your hands. (in a primitive location for months).

ps - yes, I usually run nitromethane in my glow engine, but it is known to run on methanol & castor oil mix. just needs more air to run without it and the performance suffers at altitude.

Comment: Re:Stationary bikes (Score 1) 249

by OrangeTide (#49120647) Attached to: I ride a bike ...

That's not too bad if you don't have an electrical power grid handy.

What if you don't have a pedal generator handy either?

Why would I lug such a thing around when I could lug a large solar panel for about the same effort and not have to pedal it? I think I'd rather use my feet to move my body and lift things rather than make electricity.

If I had a pedal generator up at my cabin, I would immediately look at making a waterwheel for it.

Brain off-line, please wait.