Comment by RonJohn on Northern Telecom SL-1 PBX Programming Language
Nothing in the Internet Archive?
View ArticleComment by RonJohn on 1984 accounting software running in VirtualBox fails to...
@Justme OP says printing works from the command line. Thus, it can’t be a hardware issue.
View ArticleComment by RonJohn on How can the number of cylinders supported by a floppy...
What about later 360KB drives (which is double sided 180KB)?
View ArticleComment by RonJohn on Did VMS ever acquire filesystem cross-links?
@peterh DCL definitely had RENAME, though it was restricted to the same device the file was on. Unix mv has the same restriction; it’s inter-device mv is really copy/delete.
View ArticleComment by RonJohn on Did VMS ever acquire filesystem cross-links?
@dave logicals were stupendously useful. Soooo many management tasks would be easier if they existed In Linux.
View ArticleComment by RonJohn on Which computers used the Intel 82786 graphics chips,...
An interesting comment, but just that: a comment, not an answer.
View ArticleComment by RonJohn on Why did nobody ever succeed in "clean room" cloning the...
This is the answer. (The world would be a lot different if MS-DOS was exclusive to IBM branded computers…)
View ArticleComment by RonJohn on What were the earliest images uploaded on the internet...
@davidbak that would be EDCDIC-art… :D
View ArticleComment by RonJohn on When did the PC bus start slowing access to video RAM?
IBM certainly changed that (only 64KB on the mobo) really early in the product’s life.
View ArticleComment by RonJohn on What were earliest attempts to make computers accessible?
Back in the 1980s: thick glasses, and sitting very close to the monitor. Worked for at least one guy. Text mode only, of course.
View ArticleAnswer by RonJohn for What makes a floppy disk bootable?
what about the image makes it bootable?An operating system "kernel" sitting at track 0 sector 0.EDIT: if "data", or a program that doesn't have the necessary code to finish booting the system, is at...
View ArticleAnswer by RonJohn for Who set the 640K limit?
Following up on the @StephenKitt answer:CP/M put BIOS and BDOS code at the top of RAM, and IBM decided to copy that idea. Just like with CP/M systems, the plan was to raise the start of reserved memory...
View ArticleAnswer by RonJohn for Why did expert systems fall?
The answer is in your question:"By the early 90s, the earliest successful expert systems, such as XCON, proved too expensive to maintain. They were difficult to update, they could not learn, they were...
View ArticleAnswer by RonJohn for Are there statements from IBM insiders revealing why...
IBM recognized that Microsoft was entrenched in the preinstalled retail and commercial markets, and wisely (sadly, but wisely, because I also loved Warp on my 486DX33) realized that Windows 3.1...
View ArticleAnswer by RonJohn for Can I restore an S/38 program to a current IBM i?
This appears to be a list of mailing lists devoted to the AS/400 and iSeries systems. Someone on one of those lists would certainly know.List DescriptionBPCS-L BPCS ERP SystemC400-L Bare Metal...
View ArticleAnswer by RonJohn for DPI of modern dot matrix impact printer vs DPI of old...
Math says that a 180 dpi dot is 6.67% larger than a 192 dpi dot. While a 240 dpi dot is 20% smaller than a 192 dpi dot.Since height is more important than width in variable width fonts, I’d say that...
View ArticleAnswer by RonJohn for Why was Wireplay "faster and more reliable" than...
If they still use the same modem, and the same telephone wires, why is "not using the Internet" faster and more reliableI can't speak to the "reliable" part, but the second thing I noticed after...
View ArticleAnswer by RonJohn for Why did the VT100 terminal have to be connected to a...
The 2MHz Intel 8080 ran at 290 thousand IPS (instructions per second), whereas the VAX 11/780 that a VT100 plugged into ran at 1,000 thousand IPS (aka 1 MIPS). Thus, 3+x faster.Just as importantly, the...
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Answer by RonJohn for What were/are "T-cables" and what makes them thinner...
T-cables, very thin and inexpensive, will take the place of co-axial cables and will link continents and cities.This makes me think of thinnet, which you connect to using......
View ArticleComment by RonJohn on Which S-100 systems supported both hard- and...
“I’ve never heard of any, because it was hard to do” is a comment than an answer.
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