User Ralf Kleberhoff

29 votes

Accepted

Why user-assembled kits?

answered Nov 20, 2020 at 15:35

26 votes

Accepted

How did early video terminals convert ASCII into font graphics?

z80 terminal

answered Mar 3 at 12:24

22 votes

Was there ever any reason to wait 30 seconds to restart a c.1995 PC?

ibm-pc power

answered Feb 5, 2018 at 11:04

21 votes

Graphics chips in 1980

hardware history video chip

answered Sep 2, 2017 at 19:23

20 votes

Why did CP/M and MS-DOS use the BIOS instead of their own drivers to access hardware?

ms-dos cp-m bios driver

answered Aug 4, 2017 at 15:22

8 votes

Conditional skip instructions of the PDP-8

dec pdp-8

answered Mar 2, 2018 at 8:18

8 votes

Performance characteristics of the DEC Type 30 graphical display

history graphics crt-monitor dec vector

answered May 5, 2021 at 10:47

7 votes

Why might my CRT fry any HOT I put in it?

crt-monitor

answered Aug 31, 2021 at 10:35

7 votes

Why does changing a DOS/Windows EXE cause it to not run?

ms-dos ibm-pc windows copy-protection executables

answered Oct 19, 2020 at 15:24

7 votes

Why did certain color combinations look terrible on the Commodore 64?

commodore-64 video

answered Sep 21, 2018 at 14:38

7 votes

Were people building CPUs out of TTL logic prior to the 4004, 8080 and the 6800?

history 8080 intel 6800

answered Feb 15, 2018 at 13:33

7 votes

Accepted

Did OSes write the floppy's logical sector number resulting from sector interleave/skew in the IDAM sector ID, or was it up to the OS?

floppy-disk cp-m microbee

answered Jul 22, 2020 at 12:59

6 votes

How much did the first hard drives for PCs cost?

apple-ii ibm-pc hard-disk cost

answered Dec 3, 2020 at 9:23

6 votes

How is a bus request initiated on the VME bus?

hardware motorola-68000 motorola-680x0

answered Dec 10, 2021 at 11:59

5 votes

Back in the late 1980s, how was commercial software for 8-bit home computers developed?

history software-development 8-bit-microcomputers

answered Jan 30, 2019 at 21:26

5 votes

CP/M without floppy drive

cassette-tape cp-m

answered Apr 18, 2018 at 18:31

4 votes

Ideal resolution for color computer on PAL/SECAM

crt-monitor color-display color-computer pal

answered Apr 2, 2021 at 17:34

3 votes

How was corporate training done before PowerPoint?

history software

answered Jul 5, 2018 at 19:09

3 votes

Physical resolution and control of old VGA (color) CRT monitors

crt-monitor vga

answered Dec 15, 2020 at 11:31

3 votes

What was the most popular CP/M terminal type?

terminal cp-m

answered Dec 4, 2018 at 22:04

1 vote

How much data could be stored on a single punched card?

ibm punched-cards

answered Oct 14, 2020 at 13:51

1 vote

Did any European computers use 10-line fonts?

history hardware display 8-bit-microcomputers

answered Dec 16, 2020 at 13:23

1 vote

Why was preemptive multitasking so slow in coming to consumer OS's?

amiga ibm-pc apple-macintosh unix operating-system

answered Sep 29, 2018 at 18:21

1 vote

Can a retro-computer be a useful way to learn computer-architecture fundamentals?

hardware apple-ii history motorola-68000

answered Aug 4, 2017 at 16:00

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24 Answers

Why user-assembled kits?

How did early video terminals convert ASCII into font graphics?

Was there ever any reason to wait 30 seconds to restart a c.1995 PC?

Graphics chips in 1980

Why did CP/M and MS-DOS use the BIOS instead of their own drivers to access hardware?

Conditional skip instructions of the PDP-8

Performance characteristics of the DEC Type 30 graphical display

Why might my CRT fry any HOT I put in it?

Why does changing a DOS/Windows EXE cause it to not run?

Why did certain color combinations look terrible on the Commodore 64?

Were people building CPUs out of TTL logic prior to the 4004, 8080 and the 6800?

Did OSes write the floppy's logical sector number resulting from sector interleave/skew in the IDAM sector ID, or was it up to the OS?

How much did the first hard drives for PCs cost?

How is a bus request initiated on the VME bus?

Back in the late 1980s, how was commercial software for 8-bit home computers developed?

CP/M without floppy drive

Ideal resolution for color computer on PAL/SECAM

How was corporate training done before PowerPoint?

Physical resolution and control of old VGA (color) CRT monitors

What was the most popular CP/M terminal type?

How much data could be stored on a single punched card?

Did any European computers use 10-line fonts?

Why was preemptive multitasking so slow in coming to consumer OS's?

Can a retro-computer be a useful way to learn computer-architecture fundamentals?