User hippietrail

3

23

votes

7

answers

4k

views

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

May 5 '20 at 9:10 CommunityBot 1

2

14

votes

3

answers

1k

views

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

z80 cp-m commodore-128

Sep 5 at 0:51 hippietrail 3,527

1

13

votes

1

answer

638

views

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

history hardware zx-spectrum zx-spectrum-clones spectrum-plus

Jun 2 at 13:49 hippietrail 3,527

12

votes

2

answers

905

views

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

z80 programming commodore-128

Jun 10 '20 at 21:16 birdwes 39

1

11

votes

1

answer

139

views

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

floppy-disk trs-80 terminology trs-80-model-iii

May 29 '20 at 19:33 jeffB 2,596

1

10

votes

1

answer

395

views

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

floppy-disk emulation file-format disk-image trs-80

Jan 9 at 14:10 Tommy 30.8k

1

7

votes

2

answers

1k

views

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

floppy-disk boot trs-80 coco

Jun 14 '20 at 4:38 hippietrail 3,527

7

votes

2

answers

926

views

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

apple-ii programming file-format disk-image

Jun 3 '20 at 5:23 fadden 6,861

7

votes

2

answers

746

views

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

z80 zx-spectrum emulation file-format tape-image

May 1 '20 at 3:51 CommunityBot 1

6

votes

2

answers

652

views

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

z80 interrupt zx-spectrum-clones

Jun 15 at 13:00 lvd 8,391

6

votes

2

answers

986

views

Are .COM executable binaries real mode or protected mode?

ms-dos x86 protected-mode real-mode executables

Feb 17 at 15:33 Stephen Kitt 88k

1

6

votes

2

answers

811

views

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

history 8-bit-microcomputers

Aug 16 '20 at 0:21 tofro 25.7k

6

votes

1

answer

259

views

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

floppy-disk file-format disk-image coleco

Aug 9 '20 at 7:17 hippietrail 3,527

6

votes

1

answer

290

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?

floppy-disk cp-m

Jul 23 '20 at 7:07 Ralf Kleberhoff 1,875

6

votes

1

answer

203

views

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

hardware zx-spectrum game-cartridge

Jul 21 '20 at 17:09 mcleod_ideafix 17.2k

6

votes

1

answer

400

views

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

hardware zx-spectrum game-cartridge timex-sinclair

May 2 '20 at 14:01 Rui F Ribeiro 2,161

5

votes

1

answer

87

views

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

cassette-tape coco tape-image dragon-32

Aug 11 '20 at 5:42 hippietrail 3,527

2

5

votes

2

answers

680

views

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

zx-spectrum basic

May 18 '20 at 12:18 introspec 3,682

5

votes

4

answers

1k

views

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

floppy-disk zx-spectrum boot disk-image spectrum-plus-3

May 1 '20 at 13:38 john_e 4,912

4

votes

1

answer

159

views

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

floppy-disk boot

Aug 17 at 13:06 paxdiablo 156

4

votes

0

answers

139

views

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

floppy-disk operating-system boot dragon-32

Aug 2 at 14:09 user3840170 13k

4

votes

1

answer

174

views

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

apple-ii floppy-disk boot disk-image

Jul 1 '20 at 15:47 fadden 6,861

4

votes

2

answers

269

views

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

floppy-disk zx-spectrum file-system zx-spectrum-clones tr-dos

May 20 '20 at 4:28 hippietrail 3,527

3

votes

2

answers

2k

views

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

emulation rom arcade mame

Feb 4 at 10:18 user20725 31

3

votes

1

answer

238

views

Loading a Tandy CoCo or a Dragon 32 machine code program from cassette with multiple "name blocks"

cassette-tape reverse-engineering coco executables dragon-32

Aug 11 '20 at 5:43 hippietrail 3,527

3

votes

0

answers

31

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?

floppy-disk operating-system trs-80

Jun 22 '20 at 3:45 hippietrail 3,527

3

votes

1

answer

120

views

What is the layout of the directory track on a TRS-80 Model I/Model III disk?

floppy-disk programming file-format trs-80 trs-80-model-iii

Jun 6 '20 at 1:35 Joe Lepore 101

3

votes

1

answer

165

views

Converting Apple II ProDOS blocks to DOS tracks and sectors

apple-ii floppy-disk operating-system disk-image apple-dos

Jun 3 '20 at 5:37 fadden 6,861

1

3

votes

1

answer

177

views

Do TRS-80 Model I and Model III load and execute /CMD files using specific memory addresses?

file-format trs-80 trs-80-model-iii

Jun 1 '20 at 13:51 hippietrail 3,527

3

votes

2

answers

126

views

Is there a "most correct" name for the disk format / filesystem used by Amstrads and Spectrum +3's?

floppy-disk cp-m spectrum-plus-3 amstrad

May 31 '20 at 18:18 scruss 16.2k

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46 Questions

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

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

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

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

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

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

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

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

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

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

Are .COM executable binaries real mode or protected mode?

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

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

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?

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

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

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

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

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

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

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

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

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

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

Loading a Tandy CoCo or a Dragon 32 machine code program from cassette with multiple "name blocks"

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?

What is the layout of the directory track on a TRS-80 Model I/Model III disk?

Converting Apple II ProDOS blocks to DOS tracks and sectors

Do TRS-80 Model I and Model III load and execute /CMD files using specific memory addresses?

Is there a "most correct" name for the disk format / filesystem used by Amstrads and Spectrum +3's?