Quote:
Originally Posted by murg
Ha! What modern trash!
1. flip switches to reflect binary code for single instruction.
2. press enter switch.
3. repeat as necessary.
4. press execute switch.
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Do not laugh.
We still service a computer at work that functions that way.
Of course, most of the time you only use the front-panel switches to initialize loading of the memory map from an 8" floppy disk. That 8" floppy disk is a huge improvement, until relatively recently a perforated ribbon was used.
The computer in question is hard-wired to control mission-critical technological process in a plant 24/7.
By the way, I have used hex editor to modify binaries in a distant past ("good old MSDOS days"). It was mostly used to replace a string (a piece of text) inside an *.exe or *.com file, so it would offer a different suffix for saving files, for example. Of course the replacement string had to be of the same length as the old one.