Search found 100 matches

by Fruitcake
Wed Feb 21, 2018 1:18 am
Forum: GAMES
Topic: Mazogs for the ZX80
Replies: 8
Views: 970

Re: Mazogs for the ZX80

I've fixed a nasty bug in the port of Mazogs for the ZX80 that would randomly cause the game to crash. I've produced a fix for this and uploaded the new version of the game to my website. It can be downloaded using the link provided in this thread's original posting.
by Fruitcake
Sun Feb 18, 2018 1:10 am
Forum: Emulators
Topic: New release of EightyOne available
Replies: 134
Views: 12265

Re: New release of EightyOne available

EightyOne 1.9 is now available from: https://sourceforge.net/projects/eightyone-sinclair-emulator/ The headline features are: - Enhancements/bug fixes to the breakpoint facility. - Bug fixes to the Wav Loader window. - Support for recursive Step Over debugging. - Support for Chroma 80 ROM cartridges...
by Fruitcake
Sat Feb 17, 2018 2:05 pm
Forum: Emulators
Topic: New release of EightyOne available
Replies: 134
Views: 12265

Re: New release of EightyOne available

In OPTIONS there is "TV emulation" which can be ticked or unticked but it does zilch except show the tick, no "BOX" brought up. Only just seen this posting. Does the problem still exist? It might be that the dialog is being displayed but is just appearing off screen. If so then with TV Emulation ti...
by Fruitcake
Sat Jan 13, 2018 2:22 pm
Forum: Hardware
Topic: Chroma 81 - SCART and Colour interface for the ZX81
Replies: 134
Views: 11399

Re: Chroma 81 - SCART and Colour interface for the ZX81

It's no big issue, but do you know why in the EightyOne emulator the PC's cursor keys worked with the previous version, but not with this one? Here both keys move the base to the left. It's no big problem as this seems to affect only the emulator. The patch checked for the standard game keys (SHIFT...
by Fruitcake
Fri Jan 12, 2018 3:03 pm
Forum: Hardware
Topic: Chroma 81 - SCART and Colour interface for the ZX81
Replies: 134
Views: 11399

Re: Chroma 81 - SCART and Colour interface for the ZX81

It sounds like you've put a lot of thought into the colours used and so I say run with it as you intend.

Attached is a new patched version of the game that supports both the standard control keys and the cursor control keys.
spaceraiders(standard_and_cursor_keys).zip
(2.4 KiB) Downloaded 17 times
by Fruitcake
Fri Jan 12, 2018 12:42 am
Forum: Hardware
Topic: Chroma 81 - SCART and Colour interface for the ZX81
Replies: 134
Views: 11399

Re: Chroma 81 - SCART and Colour interface for the ZX81

Nice work! :D I agree with you that the first version looks better. Have you tried making the blue and green characters forming the aliens the same colour, which would give their colouring full symmetry? As requested, attached is a patched version of the game that uses the cursor keys. spaceraiders(...
by Fruitcake
Wed Jan 03, 2018 12:06 am
Forum: Hardware
Topic: Chroma 81 - SCART and Colour interface for the ZX81
Replies: 134
Views: 11399

Re: Chroma 81 - SCART and Colour interface for the ZX81

for eee=0 to 767 seed=smsrnd(seed) dfile=peek uinteger(16396) poke dfile+$8000+eee,seed next The above code does not take into account the 'NEWLINE' positions within the attributes file. The attributes file begins with a position corresponding to the initial NEWLINE character in the display file, f...
by Fruitcake
Tue Jan 02, 2018 11:56 pm
Forum: Hardware
Topic: Chroma 81 - SCART and Colour interface for the ZX81
Replies: 134
Views: 11399

Re: Chroma 81 - SCART and Colour interface for the ZX81

Here’s some example assembler code to show the basic mechanisms for accessing the two colour modes provided by the Chroma 81 interface. CHECK AVAILABILITY Reading I/O port $7FEF can be used to check whether the Chroma colour facility is enabled: LD BC,$7FEF IN A,(C) AND $20 The A register will hold ...
by Fruitcake
Sat Dec 30, 2017 11:57 pm
Forum: Hardware
Topic: Chroma 81 - SCART and Colour interface for the ZX81
Replies: 134
Views: 11399

Re: Chroma 81 - SCART and Colour interface for the ZX81

A description of the colour modes can be found at the end of the document available from here.
by Fruitcake
Mon Nov 27, 2017 1:58 am
Forum: Emulators
Topic: New release of EightyOne available
Replies: 134
Views: 12265

Re: New release of EightyOne available

On SourceForge I collated all the versions of EightyOne (and their source) I had collected over the years and also those I could find scattered across the Internet. Although I doubted anyone would ever have a use for these very old versions, it seems a shame to lose them. However, the set is far fro...