Search found 2060 matches

by dr beep
Wed Feb 28, 2024 9:39 pm
Forum: Spectrum BASIC
Topic: Does the zx spectrum have a fill command?
Replies: 6
Views: 906

Re: Does the zx spectrum have a fill command?

Crayon21 wrote: Wed Feb 28, 2024 9:33 pm crap. are there basic extensions that have it?
By heart betabasic has
by dr beep
Sun Feb 25, 2024 1:14 pm
Forum: Hardware
Topic: How close is the ZX80/81, Jupiter Ace and Spectrum in machine code backwards hardware compatibility?
Replies: 5
Views: 292

Re: How close is the ZX80/81, Jupiter Ace and Spectrum in machine code backwards hardware compatibility?

Comparing a ZX80/ZX81 with a ZX Spectrum: there are significant differences in hardware and in the BASIC. The memory map is not too much of a problem except that in a ZX80/ZX81 the 'display file' is determined by software. But in the ZX Spectrum, it's fixed in the 'lower' RAM area. It also is much ...
by dr beep
Sun Feb 25, 2024 12:58 pm
Forum: Hardware
Topic: 16k Sinclair issue 1 pack
Replies: 33
Views: 1368

Re: 16k Sinclair issue 1 pack

Try this game without RAM-pack.
Does the ZX81 show the right picture then?

You can do it, the game is my 1K 3D Random maze (Game 5 of 81 1K hires games)
by dr beep
Sun Feb 25, 2024 12:55 pm
Forum: ZX BASIC
Topic: New Screen Saver :-) Enjoy!
Replies: 3
Views: 462

Re: New Screen Saver :-) Enjoy!

1024MAK wrote: Sun Feb 25, 2024 11:15 am Here's my screensaver:

IMG_7867.jpeg

Runs on a 1K machine.

Mark
Shorter:

Code: Select all


+ABS INT -PI

can be

-INT -PI
[/code\
by dr beep
Sun Feb 25, 2024 12:48 pm
Forum: Hardware
Topic: How close is the ZX80/81, Jupiter Ace and Spectrum in machine code backwards hardware compatibility?
Replies: 5
Views: 292

Re: How close is the ZX80/81, Jupiter Ace and Spectrum in machine code backwards hardware compatibility?

Is it a matter of different address mapping, such as it would work if you had a system that remapped the address space when running a program for another system, or are they fundamentally different? My emulators remap all memoryaddresses up 32K. In (very) short: ZX81/ZX80 #0000-#1FFF ROM #4000-#7FF...
by dr beep
Sun Feb 25, 2024 12:40 pm
Forum: Hardware
Topic: How close is the ZX80/81, Jupiter Ace and Spectrum in machine code backwards hardware compatibility?
Replies: 5
Views: 292

Re: How close is the ZX80/81, Jupiter Ace and Spectrum in machine code backwards hardware compatibility?

Hi, I'm curious in how backwards compatible programming in machine code, is between hardware in the ZX80, ZX81, Jupiter Ace and Spectrum? Define compatible. As said. Storage on tape is already different so you need additional software to load from tape. Another problem is the fact that ROM is on th...
by dr beep
Thu Feb 22, 2024 10:11 pm
Forum: ZX Spectrum Lounge
Topic: how did zx spectryum programmers make those big character graphics in games?
Replies: 3
Views: 678

Re: how did zx spectryum programmers make those big character graphics in games?

dr beep wrote: Thu Feb 22, 2024 9:09 pm Outside assembly?

Define UDGs and use those to print, like SMURFS
https://www.spectrumcomputing.co.uk/ent ... m/Schlumpf

or make your own characterset
by dr beep
Thu Feb 22, 2024 12:29 pm
Forum: Welcome Area
Topic: Hello from Poulette73
Replies: 13
Views: 1207

Re: Hello from Poulette73

Hello everyone, I'm Olivier, 51 years old, and I live in France. Welcome. I also bought a ZXPand+ extension in order to take advantage of the SD support I can't wait to discover games and utilities. lucky you, not everyone can get a zxpand. As for games.... you can try my 1K hires games (and 1k low...