Search found 1254 matches

by dr beep
Mon Apr 06, 2020 10:26 pm
Forum: Emulators
Topic: ZXSimulator for the Sinclair QL
Replies: 8
Views: 317

Re: ZXSimulator for the Sinclair QL

Oh that's very sad to hear. I've seen the Xtricator running and it looks like a very sophisticated and a polished piece of software. I was trying to run it on the Q68 but hadn't set up my directory environment properly. My ZXSimulator won't be as compatible as that since it won't emulate the Z80 an...
by dr beep
Sun Apr 05, 2020 10:19 am
Forum: Emulators
Topic: ZXSimulator for the Sinclair QL
Replies: 8
Views: 317

Re: ZXSimulator for the Sinclair QL

Welcome to the forums - great to see a new ZX81 emulator for the QL - there is an existing one, but whilst the Spectrum emulators have had several versions and improvements, there has only ever been Xtricator (http://www.dilwyn.me.uk/zx81/index.html). And the developer died a few years ago so no up...
by dr beep
Tue Mar 17, 2020 3:51 pm
Forum: Welcome Area
Topic: hello from Belgium
Replies: 3
Views: 1062

Re: hello from Belgium

Welcome...

You have a few years to catch up.

A kot of software was made in the 21th century.
by dr beep
Thu Feb 27, 2020 7:05 pm
Forum: GAMES
Topic: Super Star Trek
Replies: 23
Views: 7837

Re: Super Star Trek

I think this should fit 16K machinecode.
by dr beep
Thu Feb 27, 2020 6:59 pm
Forum: GAMES
Topic: Super Star Trek
Replies: 23
Views: 7837

Re: Super Star Trek

Can't get it to work in EO due to reset when loading next program.

EDIT: UNPACK AND USE TZX, DOESN'T RUN FROM ZIP
by dr beep
Thu Feb 27, 2020 6:13 pm
Forum: Emulators
Topic: A new ZX81 Emulator
Replies: 9
Views: 1814

Re: A new ZX81 Emulator

I think the only thing you need to do is to emulate a correct read of a IN port. After that the original code can do the job after disabling the calls to upper memory for display (done the same on the SAM-coupe) This needs a routine that checks the keys read by each reset bit from the ports. I don't...
by dr beep
Wed Feb 26, 2020 5:53 am
Forum: Emulators
Topic: A new ZX81 Emulator
Replies: 9
Views: 1814

Re: A new ZX81 Emulator

Help offered......
by dr beep
Tue Feb 25, 2020 10:19 pm
Forum: Emulators
Topic: A new ZX81 Emulator
Replies: 9
Views: 1814

Re: A new ZX81 Emulator

Problems you might get 1) ROM-bug. Can you protect #0000-#1FFF against writing? If not, first addresses will be overwritten. 2) Reading IN-port (result can be different from machine you run or ZX81. Can be fixed with a scan and RST. 3) My games with "hidden" data on screen, can be emulated with corr...
by dr beep
Tue Feb 25, 2020 9:33 pm
Forum: Emulators
Topic: A new ZX81 Emulator
Replies: 9
Views: 1814

Re: A new ZX81 Emulator

Hello All, I am using the NMI to jump to my emulator which copies the D_FILE to the Adam's video processor and allows me to debug as needed. That is the same way I coded SAM81, the ZX81 emulator for the SAM Coupe. It was coded in 1/2 day using the display from the ZX81EMUL for the ZX Spectrum I was...
by dr beep
Tue Feb 25, 2020 9:16 pm
Forum: Emulators
Topic: A new ZX81 Emulator
Replies: 9
Views: 1814

Re: A new ZX81 Emulator

Andy Rea wrote:
Tue Feb 25, 2020 7:46 pm
not sure what happens when multiple keys are pressed...
Multiple keys return a NO KEY PRESSED, it ignores the input.