Retrocomputing Questions, Problems & Solutions : TransWikia.com ~ Page 5

How to build an ATA controller for the AT bus?

I would like to replace the ST502 MFM disk controller in my Schneider Target PC 7640 (about which I asked earlier) with an ATA (IDE) controller as it gets...

Asked on 08/25/2021 by fuz

2 answer

Does the Sega Megadrive 2 have built-in protection against reverse polarity

I have a spare universal power supply with regulated voltage up to 12 volts, max 1500mA. It has replaceable tips, where you can reverse polarity. As I understand the MegaDrive...

Asked on 08/25/2021

3 answer

How does the GameBoy's Memory Controller MBC1 Work in Mode 1?

In short, are banks 20h/40h/60h accessible in mode 1? The Pan Docs state that when in mode 1, those banks become accessible."...on large carts (using the secondary...

Asked on 08/25/2021 by Ben L.

1 answer

Were there any parallel port keyboards?

I was reading this QA ( Why is the clock frequency of the PS/2 keyboard protocol so high? ) and read in the replies that a high frequency was...

Asked on 08/25/2021 by Dai

8 answer

What happened to exposed address pins/address bus?

This could be a question for the Electronics StackExchange, but I figured that if I couldn't find any info about it it might be more of a Retrocomputing thing. I've...

Asked on 08/25/2021 by Architect

7 answer

CDTV Diagrom 1.2 Extended Memory Test AddressError Detected

I've picked up this CDTV some time ago, but didn't have DiagROM to test it properly. It is running perfectly fine, all features. My diag chip arrived this morning, and...

Asked on 08/25/2021 by Bartek Malysz

1 answer

Sinclair's microdrive -- was it based on compact cassette technologies?

Recently I've also looked inside microdrive drives of Sinclair QL and inside microdrive cartridges for it. The tape looked like a compact cassette tape cut longitudinally to a half width...

Asked on 08/25/2021 by lvd

2 answer

What connector for Atari 2600 Controller?

I am working on designing a 8 bit computer and I was considering adding support for a Atari 2600 controller. I know it uses a D-Sub9 connector, but is there...

Asked on 08/25/2021 by benjamin black

4 answer

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

The Microbee was an early '80s Z80 microcomputer from Australia that was successful mostly in education. Looking at some disk image files I've downloaded I can see...

Asked on 08/25/2021

1 answer

Could you create a loop in direct-mode with BASIC?

Were there any home computers before 1985, on which you could create a loop (finite or infinite) in direct-mode? And if it was possible on some machines,...

Asked on 08/25/2021 by mnml

4 answer

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