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hippietrail
  • Member for 5 years, 11 months
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38 votes
3 answers
11k views

What was the first operating system to be called an "operating system"?

24 votes
7 answers
4k views

Was it possible programmatically to manipulate the volume as well as the pitch on computers with no sound chip?

15 votes
3 answers
1k views

Are there games for the C128 that run (mainly) on the Z80 rather than the 6502?

14 votes
1 answer
716 views

Did the Samsung SPC-650 have any hardware or firmware differences to the genuine Sinclair Spectrum+?

12 votes
2 answers
1k views

Did the Commodore 128's Z80 CPU also have full access to the machine's custom hardware?

11 votes
1 answer
168 views

In TRS-80 parlance when talking about disks, what are "granules" and "lumps"?

10 votes
1 answer
552 views

Understanding the DMK disk image file format used by TRS-80 emulators

10 votes
2 answers
1k views

What tape format did the Nintendo Famicom Data Recorder use?

9 votes
0 answers
118 views

On the TRS-80 models I and III when is the directory track number written in the third byte of sector zero, and when in the second byte?

8 votes
2 answers
1k views

Are .COM executable binaries real mode or protected mode?

8 votes
1 answer
582 views

Did the Timex Sinclair 2068 and the Sinclair ZX Interface 2 use totally different hardware and software techniques?

7 votes
2 answers
819 views

Why does the .z80 emulator-snapshot format have separate fields for the 8-bit refresh register and bit 7 of R?

7 votes
2 answers
2k views

Could Tandy TRS-80 Color Computers boot from disk at all?

7 votes
2 answers
1k views

How can I programmatically determine whether an Apple II .dsk disk image is a DOS .do image or a ProDOS .po image?

7 votes
1 answer
345 views

Was the Ram Turbo the only 3rd party Interface 2 ROM cartridge interface for the ZX Spectrum or were there others?

7 votes
1 answer
384 views

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?

7 votes
1 answer
344 views

What floppy disk format and layout and what disk image format are used for the Coleco Adam?

6 votes
2 answers
902 views

What was the first microcomputer capable of working with Japanese kanji?

6 votes
2 answers
742 views

Did any ZX Spectrum clones use the Z80's interrupt mode zero?

5 votes
1 answer
311 views

At which RAM address is the Microbee disk boot sector loaded and executed?

5 votes
1 answer
117 views

Length of leader block in Coco and Dragon cassette tape header and .cas tape image file format

5 votes
2 answers
762 views

Does Sinclair Spectrum BASIC have a maximum length for one line?

5 votes
4 answers
516 views

How did the Spectrum clones with TR-DOS and paged memory load and run code files from disk?

5 votes
4 answers
1k views

How does the Spectrum +3 know whether a disk is bootable or not?

4 votes
3 answers
359 views

How do I know where the file directory is stored on a Spectrum +3 disk layout?

4 votes
1 answer
343 views

What did "double track" mean in relation to floppy disks?

4 votes
1 answer
230 views

Determining which sectors in an Apple II floppy disk/image are used when the boot sector declares more than 1 sectors

4 votes
0 answers
151 views

What does a "DK" signature mean at the start of track 0 sector 3 of a Dragon 32/64 floppy disk?

3 votes
0 answers
214 views

Do the Tandy CoCo and the Dragon 32 & 64 use all the same disk image file formats?

3 votes
2 answers
3k views

How can I get MAME to run modified ROMs whose checksums don't match the originals?