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Comment: HP LaserJet III / HP 28C (Score 1) 702

by DaWorm666 (#46790151) Attached to: Ask Slashdot: What Tech Products Were Built To Last?
HP LaserJet III - Can't seem to kill it. Slow, by today's standards, but still prints like a champ. It's at home or I'd pull up the page stats. I think its over 1,000,000 prints, as it was used at the office for at least 15 years before they retired it (couldn't get a parallel port to run it off of easily) and I brought it home. HP 28C - While not everyone's favorite HP calculator, my 28C was purchased when I was a freshman in college in 1985, and still used daily. As a matter of fact, I think it's only on it's fourth or fifth set of batteries. They just never die.

Comment: Re:Some observations... (Score 1) 212

by DaWorm666 (#43890167) Attached to: Ask Slashdot: Supporting "Antique" Software?
In addition to the modem control signals, USB adapters also really mess up the timing of the signals. Some RS-232 hardware does not use any flow control, and relies on character timeouts to detect end of message. USB ports packetize the data, and can break up the packets in unpredictable places, so that delays can appear in the message, causing the other side to detect an end of message too soon. Also, some equipment uses the control lines such as RTS/CTS, DSR/DTR, RI, and DCD for I/O purposes. In DOS, it wasn't that hard to get somewhat decent timing to create and/or detect signals of specific duration with these pins, using them as essentially free digital I/O. With a USB to serial adapter, especially under Windows, it is nearly impossible to get any precision timing. Add to that another layer of VM, and it just gets worse. How bad this is really depends on the chipset and drivers. I've had more luck with PL2303 based devices than FTDI along these lines, but for some applications, USB to serial just won't work.
IBM

+ - AIX 25th Anniversary->

Submitted by Anonymous Coward
An anonymous reader writes "Twenty five years ago on January 21, 1986, IBM Austin launched a new operating system called IBM RT Personal Computer Advanced Interactive eXecutive — better known as AIX--with a new system called the IBM RT PC. The system ran on a RISC processor codenamed “ROMP” (for Research Office Products Division MultiProcessor) and was originally marketed as an engineering workstation."
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