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Retrocomputing : Recent Questions and Answers (Page 3)

Find answers to your questions about Retrocomputing or help others by answering their Retrocomputing questions.

Could you reverse engineer silicon just by looking at it?

I was interested in a recent interview of Masayuki Uemura, one of the engineers who designed the Nintendo Famicom in the early 80s. During initial design phase...

Asked on 08/25/2021 by da66en

8 answer

Which CPUs, if any, had an 8-bit address space?

Even the Intel 4004, which had a 4-bit word size, had a 12-bit address space. I'm wondering if any commercial CPUs had an 8-bit or similar address-space for programs, data,...

Asked on 08/25/2021 by lookaside

8 answer

Can special tools recover data from floppy disks when Windows Explorer fails to do so?

I have many 1.44MB floppies 20 years old or older. My FDD, which I just bought online and received recently, cannot read them. The FDD can often display the contents...

Asked on 08/25/2021 by Nicholas Hill

4 answer

Were there really any cost savings in Sinclair QL because of it being 8-bit design with 8-bit bus 68k CPU?

I've recently looked into the Sinclair QL schematics and found that it actually has two 8bit ROMs, 16 4164 DRAM chips and yet it is purely 8bit machine, even the...

Asked on 08/25/2021

4 answer

Why is the clock frequency of the PS/2 keyboard protocol so high?

The PS/2 keyboard protocol allows the keyboard to generate a clock rate between 10 kHz and 16.7 kHz. At 11 bits per scancode, 10 kHz is a massive 909 scancodes...

Asked on 08/25/2021 by Jacob Krall

5 answer

How does one convert Atari assembly to A=USR(ADR("[garble]")) style BASIC wrapper?

Some small utilities, tools etc for Atari were distributed as BASIC programs that would consist of just one line, that looked something like this:10 A=USR(ADR("p$PHHLéúÿÿÇEéúÿÿ@éüÿÿ2A$éòùÿÿE°U´è§øÿÿøÿÆûÿÿé`"))Sometimes they would be split...

Asked on 08/25/2021

1 answer

Atari 2600 paddle controllers slow, jittery

I recently picked up a pair of Atari 2600 paddle controllers for use with my Atari Flashback 6. The Amazon store said in the product description that they had...

Asked on 08/25/2021

2 answer

What prevents faster versions of old architectures from being created?

Showing my ignorance about hardware here - I noticed there is still a community developing Amiga accelerators cards.Giving substantial boost from the original memory for example. However the processor...

Asked on 08/25/2021 by ideasman42

11 answer

How can I use a SideWinder 3D Pro with a modern PC running Windows 7?

I've got a sweet joystick that uses gameport, and I'd like to use it in my Kerbal Space Program. My modern PC lacks any ISA or PCI slots, so I...

Asked on 08/25/2021

2 answer

How did the "rub joystick port to continue" in the Creatures 2 infinite lives cheat work?

The game Creatures 2 on the Commodore 64 had an unusual cheat to get infinite lives which unlike most things on the Internet that are said to "really work" really...

Asked on 08/25/2021 by colmde

3 answer

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