Search found 1426 matches

by dr beep
Sun Mar 07, 2021 3:46 pm
Forum: Development
Topic: Gamecoding in machinecode on a ZX81.
Replies: 26
Views: 1952

Re: Gamecoding in machinecode on a ZX81.

OK, I was away for a few weeks to code something for 40th anniversary, but I am back. -------------------------------------- 6 scoring (4) Ok, so we can play but we need an incentive to get a score. Let us add a timer with a minimal setting. We already have a random-routine, which we can re-use to s...
by dr beep
Sun Mar 07, 2021 11:00 am
Forum: GAMES
Topic: New ZX81 Games
Replies: 196
Views: 216276

Re: New ZX81 Games

I tried to run it on my Zeddy, which has a "zx81x2.rom". But the program remains in the initial screen. Same on EO, when using also the "zx81x2.rom". But it works on EO, when using the "zx81x2m.rom", which has the original NMI-routine (necessary to use it on ZxMore), which is slightly slower than t...
by dr beep
Sun Mar 07, 2021 10:44 am
Forum: GAMES
Topic: New ZX81 Games
Replies: 196
Views: 216276

Re: New ZX81 Games

kolbeck wrote: Sun Mar 07, 2021 12:12 am Not running for me either in EO 1.21

Same problem with 2PAXMAN, other 1k-wrx works fine

/Thomas
Small fix made. Moment of intrupt made an impossible loop.
https://sinclairzxworld.com/viewtopic.p ... 373#p41373
by dr beep
Sun Mar 07, 2021 10:27 am
Forum: GAMES
Topic: New ZX81 Games
Replies: 196
Views: 216276

Re: New ZX81 Games

kolbeck wrote: Sun Mar 07, 2021 12:12 am Not running for me either in EO 1.21

Settings:
H-R: WRX
RAM Pack: None

Same problem with 2PAXMAN, other 1k-wrx works fine

/Thomas
EO v1.21 makes an intrupt before screen is built. I delayed the intrupt, now working on EO v1.21
by dr beep
Sat Mar 06, 2021 2:00 pm
Forum: GAMES
Topic: New ZX81 Games
Replies: 196
Views: 216276

Re: New ZX81 Games : Johnnie Walker

zx-heinz wrote: Sat Mar 06, 2021 12:29 pm
dr beep wrote: Fri Mar 05, 2021 10:00 pm Requirements (eg. 1K, 16K, AY Card, Hi-Res Scheme): 1K hires
Hello Dr. Beep,
unfortunately the game doesn't run with graphics on my EO. Just black blocks. Where can I get the Hi-Res Scheme?
Heinz
Change settings in hardware/hires graphics WRX.

Goodluck!
by dr beep
Fri Mar 05, 2021 10:00 pm
Forum: GAMES
Topic: New ZX81 Games
Replies: 196
Views: 216276

New ZX81 Games : Johnnie Walker

Name of Software: Johnniew Walker Author: Johan "Dr Beep" Koelman Release Date: 05/03/2021 Requirements (eg. 1K, 16K, AY Card, Hi-Res Scheme): 1K hires WRX Description: Johnnie Walker lives on the label of the bottle. Gameidea : M. Swatosch JW75.jpg Johnnie Walker JOHNNIE WALKER Johnnie Walker lives...
by dr beep
Wed Mar 03, 2021 10:11 pm
Forum: GAMES
Topic: New ZX81 Games
Replies: 196
Views: 216276

Re: New ZX81 Games

JohnsBargs wrote: Wed Mar 03, 2021 7:43 pm Digg-It is maybe the most impressive 1K game I've ever seen - fast, smooth, really nice to play and very addictive (top score so far 51). Top work.
Thanks for the compliment.

Have you played my 1K hires games?
Personally I think they are more impressive.
by dr beep
Sun Feb 28, 2021 11:46 am
Forum: Emulators
Topic: SP-2-ZX81, the new ZX81-emulator for the 48K ZX Spectrum
Replies: 14
Views: 9141

Re: SP-2-ZX81, the new ZX81-emulator for the 48K ZX Spectrum

Loading my latest game into my emulator reveilled a bug in opcode #31 : LD SP.NNNN

Now solved in v2.01

http://www.mediafire.com/file/dbox3vu1s ... 1.tap/file


P.S. The bugged screen on start is expected in the emulation on the ZX Spectrum.
by dr beep
Sun Feb 28, 2021 10:30 am
Forum: Development
Topic: Is there a beginners guide to Hires?
Replies: 8
Views: 532

Re: Is there a beginners guide to Hires?

Trevor_B wrote: Sun Feb 28, 2021 12:31 am I'd like to start by making sure I've got the machine set up correctly, making sure I can see the upper banks of RAM etc.

Trev
now this is a questionable remark. How much memory do you have because there is no upper bank (in theory 16K only).
That is how the hardware knows when to do a display.
by dr beep
Sun Feb 28, 2021 8:44 am
Forum: Development
Topic: Is there a beginners guide to Hires?
Replies: 8
Views: 532

Re: Is there a beginners guide to Hires?

Step by step:

IX starts hires, but is called from the ROM.

Routine fills top of screen, then does 192 displays of a line
Then handles the reading of keyboard, undoes setting by the ROM and sets IX for next display.

The screen itself is altered in the program you write yourself.