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Post by CampKohler (Sacramento CA) on Apr 4, 2018 18:59:00 GMT -5
I found a PNY 512 MB thumb drive in a bunch of stuff someone tossed out. I tried it on an HP PC, but it thought it was a replaceable media drive and so failed, and couldn't be reformatted. I read that if the PC couldn't talk to the drive, say because the chip inside was bad, that would be the assumption. MS said to try another PC, because it may be a driver problem. The library Dell PC also couldn't read it, but it at least allowed me to reformat it. Now it's working. Yayy! A whole half GB! But it's good if you left your regular drive behind or misplaced it.
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Post by sneakers (Metro Houston) on Apr 5, 2018 18:17:28 GMT -5
Well, 512 MB is quite a bit if you're keying in the data by hand.
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Post by picturefreak on Apr 5, 2018 18:23:39 GMT -5
64K is quite a bit if you're keying in the data by hand.
Who remembers typing programs in from magazines? Especially machine code...
0000000: 6649 7420 6968 2073 6577 6572 6d20 6361 0000010: 6968 656e 6320 646f 2c65 7420 7079 6e69 0000020: 2067 6e69 7420 6968 2073 6f77 6c75 2064 0000030: 6168 6576 6220 6565 206e 7571 7469 2065 0000040: 6574 6964 756f 2e73 4820 776f 7665 7265 0000050: 7920 756f 6720 746f 7320 6974 6666 6465 0000060: 7420 6968 2073 6974 656d 202c 6874 7369 0000070: 6920 2073 656d 6572 796c 6820 7865 632d 0000080: 646f 6465 4120 4353 4949 0a2e
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Post by sneakers (Metro Houston) on Apr 5, 2018 19:40:23 GMT -5
Who remembers typing programs in from magazines? Especially machine code... I remember keying in boot loaders from the toggle switches on the front panel of the computer. Then, computers got better and they started using hexadecimal keypads.
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lind
Champion Member
Slaying system bugs
Posts: 2,629
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Post by lind on Apr 5, 2018 20:16:55 GMT -5
I suspect humans could remember the switch sequence if they did it enough times... though not having parity check of some sort makes it easy for mistakes. At least magazine programs had checksums to catch keying errors sooner rather than later.
However, the number of possibilities in the 64K range is quite large, and memorizing/keying in machine code for that starts to get difficult.
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afos
Champion Member
Posts: 1,897
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Post by afos on Apr 14, 2018 18:31:31 GMT -5
I suspect humans could remember the switch sequence if they did it enough times... though not having parity check of some sort makes it easy for mistakes. At least magazine programs had checksums to catch keying errors sooner rather than later. However, the number of possibilities in the 64K range is quite large, and memorizing/keying in machine code for that starts to get difficult. The National Weather Service installed its first network of computers in the late 1970s and 1980s which we booted up using toggle switches and had to do it enough times that we probably all memorized the sequence.
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Post by techpanda on Apr 15, 2018 1:14:19 GMT -5
The first computer I worked on had a standard memory of 1.4K, with a maximum of 16K. The machine I worked on had 12K. The memory was made up of magnetic cores. As I recall, toggle switches were occasionally used in booting the computer.
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Post by CampKohler (Sacramento CA) on Apr 20, 2018 6:51:31 GMT -5
When I worked in the turnkey real estate computer biz, I was sent out of town for a job in another city. Meanwhile, in my absence, my colleague had some problem with the system that required contacting company tech support. After it was resolved, he was told to push this button and that button, toggling bits, etc., because the company was used to directing every little thing due to hiring not-too-competent (or suspecting them of being so) locals to run the sites. But the system would not boot up, so they were sweating bullets. They placed a call to me.
I heard them giving the instructions to my colleague and noted that they made a mistake by assuming that we had a "normal" HP 2100 CPU, whereas in fact we had one of a few with an error in the boot ROM requiring a certain bit to be toggled off in the booting. As soon as I heard that, I asked, "What about bit 13?" They answered, "Oh, you have one of those..." I said, "Here's how you do it: Bob, boot up the computer." Up it came. I explained that being retired military, when given orders he follows them, so if you give the wrong orders, he follows those too. But he knew his job and could boot properly. Being as the company had obviously failed to keep track of which sites had been shipped the oddball CPUs (or had not consulted the list if they had), they couldn't complain too loudly about our performance in that morning's fiasco.
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Post by gth (Columbus OH) on May 1, 2018 7:39:33 GMT -5
Who remembers typing programs in from magazines? Especially machine code... I remember keying in boot loaders from the toggle switches on the front panel of the computer. Then, computers got better and they started using hexadecimal keypads.
LOL! I did both of those, back in the day.
But you forgot the original PCs like the Radio Shack TRS-80, with casette tape I/O.
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wb6yyz
Champion Member
Wilkes Barre/Scranton Area
Posts: 5,525
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Post by wb6yyz on Sept 12, 2018 9:14:00 GMT -5
Ah yes, the "Trash 80" I never had one. My first computer was a Cromemco Z-2 in kit form. And it was not just assembling boards into a case like one does today, it was actually stuffing and soldering boards! Of course back then it was all through hole parts and not that hard SMT had not been invented yet.
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