Newest Questions
6,686 questions
5
votes
1
answer
306
views
What's the maximum amount of sectors an LBA ROM-BIOS sector read call can access?
I recently added support for multi-sector CHS reads to an experimental fork of my kernel's initial loader, described in https://github.com/SvarDOS/bugz/issues/174
I have some space left before the ...
- 1,747
23
votes
1
answer
1k
views
Where does the Unix pack compressor come from?
I'm interested in the history of the Unix pack compression algorithms and their implementation. My questions are:
Who wrote the first, older one? How was it originally distributed, and when and how ...
- 5,499
8
votes
1
answer
2k
views
Is this a Siemens T100S?
Impossible to read exact model, anyone here can recognize the exact model and year of this telex machine?
From the 1971 Italian movie Senza via d'uscita, minute 35-40.
Some sites report it as T100S, ...
- 3,497
11
votes
3
answers
1k
views
Bypassing C64's PETSCII to screen code mapping
I asked this in stackoverflow and was told to better ask it here. I'll link between these 2 questions, if I get an answer. Sorry. So:
In upper-case mode, the C64 PRINT ASC("A") prints 65 - ...
- 231
-2
votes
1
answer
257
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Addressing on the Intel 1103 [closed]
I'm looking at a pinout of the 1103, a 1kb DRAM. It has address pins A0 through A8.
2^9 = 512 bits, not 1,024. So how did it address 1,024 bits?
- 22.4k
10
votes
2
answers
603
views
Did any computer systems allow using Teletext as a secondary display?
This question made me ponder: Many computer systems in the 1980s had an RF Modulator to connect to regular television sets, and teletext was part of the vertical blanking interval of that TV signal.
...
- 2,212
8
votes
0
answers
226
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Earliest assembler executable supporting the AT&T syntax for the i386
I'm looking for a purchase option or a free download of the earliest assembler executable supporting the AT&T syntax (e.g. movl $42, (%eax)) for the i386.
Most likely this will be the COFF i386 ...
- 5,499
19
votes
0
answers
376
views
Historical use of the SID chip outside Commodore products
The SID chip (originally the MOS Technology 6581) was the sound chip used in the original Commodore 64, and is widely credited with helping make that machine one of the best-selling home computers of ...
- 8,502
13
votes
1
answer
2k
views
What's the PC used in "American Kickboxer"?
This PC appears in "American Kickboxer" at minute 60.
Anyone recognize model?
- 3,497
13
votes
0
answers
348
views
What do “Cert DX2” strings embedded within some Windows drivers signify?
Executable formats used in Windows – PE, LE and NE – are extended from MS-DOS’s MZ executable format. This means that Windows binaries (including DLLs) can potentially be run as MS-DOS executables, ...
- 27.6k
10
votes
1
answer
2k
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Why it is that a 64-bit EXE file (PE64) can contain a custom MS-DOS stub (a MZ executable), but not a custom 32-bit Windows stub?
I think the question is self-explanatory. It's way more likely that somebody will accidentally try to run a PE64 executable under 32-bit Windows than that they will try to run it under DOS, so why ...
- 439
7
votes
0
answers
310
views
Mahjong-Solitaire clone with prevalent (or prevailing) winds
I'm looking for an old Windows 95, 98 or 2000 OS and era video game.
It was a shareware or freeware Mahjong-Solitaire clone (single player). It's main difference from mainstream Mahjong-Solitaire ...
- 1,668
24
votes
2
answers
6k
views
Why is ASCII punctuation in that order?
Symbol
DEC
HEX
BIN
Description
Unicode
SP
32
20
100000
Space
SPACE
!
33
21
100001
Exclamation mark
EXCLAMATION MARK
"
34
22
100010
Double quotes (or speech marks)
QUOTATION MARK
#
35
23
100011
...
- 343
6
votes
0
answers
297
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Dynamically loading .o files in early UNIX?
I have a vague recollection that in the late 1980s or early 1990s I saw a piece of (toy?) C code for UNIX implementing dynamic linking-loading of .o files into a running process, somewhat akin to the ...
- 22.3k
7
votes
1
answer
2k
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PC used in movie "Ghosthouse" (1988)
Anyone known which pc is this? Seem an Amstrad to me but I don't know the model.
Any idea?
In this other screenshot I recognize the good old monitors with green color and black which I has also on my ...
- 3,497