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Questions tagged [cpc]

For questions related to the Amstrad CPC series of 8-bit home computers.

6
votes
1answer
329 views

Common practices of programming the AY-3-8910 on Amstrad CPC: via Firmware routines or directly?

I'm starting to learn how to program in assembly (z80) on the Amstrad CPC computer. As an high level developper i find it pretty fun and i learn a lot of things about computer and CPU architecture. ...
5
votes
3answers
676 views

Why was the Amstrad CPC slow at scrolling

As I understand, neither the Amstrad CPC or the Sinclair Spectrum had any support for hardware scrolling, and arcade conversions struggled compared to the C64 or NES. However, isometric 3D games ...
6
votes
4answers
669 views

A game where you program a robot to fulfill missions

I'm looking for a game. Unfortunately there're only few things I remember: You had a robot. There was no way to steer it manually, so to solve a room, every step to do had to be programmed in advance ...
9
votes
4answers
695 views

Was the Amstrad's file protection considered secure in 1985?

I just reverse engineered the file protection on the Amstrad CPC, which uses two sequences of rotating bytes taken straight out of the AMSDOS ROM to XOR each byte of the file. If you have SEQa of 13 ...
8
votes
4answers
1k views

Writting DSK images onto a 3'' floppy for Amstrad/Sinclair computers

For a project I'm working on, I need to write some disks to test on my Amstrad CPC 6128. I've got some 3'' inch blank disks, and all my Amstrad computers (CPC and PCW) have 3'' inch disks, as well as ...
9
votes
2answers
213 views

What method does the game Tau Ceti use to spell-check its commands?

This was originally going to be an identify-this-game question but I found the game I was looking for! I played Tau Ceti when I was a kid and I remember being amazed by how it would accept spelling ...
11
votes
2answers
826 views

How did Mode 3 on the Amstrad CPC work?

The Amstrad CPC had three official screen modes: Mode 0: 160x200, 16 colours, 4 bits per colour, 2 wide pixels per byte, bit-interleaved Mode 1: 320x200, 4 colours, 2 bits per colour, 4 square pixels ...
4
votes
1answer
425 views

What's the name of this game on the Amstrad that had red-blue separated 3D?

I remember playing a game on the Amstrad 6128 in the '80s or early '90s. It was a space adventure with at least part of the action flying through space and shooting alien ships. There was an option ...
13
votes
1answer
510 views

Memory sharing mechanism in the Amstrad CPC computer

In the Amstrad CPC464 (and I guess it's the same for CPC664 and 6128), the CRTC and the gate array work together to build the display image: every microsecond, the CRTC puts a memory address and a ...
14
votes
1answer
3k views

Is it possible to use an Amstrad CPC464 with a modern monitor or TV

During a recent move I lost the monitor for my Amstrad CPC464. Is it possible to adapt the output of this to work on a modern monitor or on television set?