Search found 2313 matches

by 1024MAK
Fri Jun 14, 2019 12:26 pm
Forum: Development
Topic: New hardware I/O board using Parallax Propeller
Replies: 12
Views: 250

Re: New hardware I/O board using Parallax Propeller

Wilf goes into considerable detail about the ZX81 video system here ;-) Yes, we know that the pages are full of ? symbols (discussed on here a while ago). In order for RAM to be hi-res capable, it must output data during both the Z80 read cycle and during the Z80 refresh cycle. So when either /RD is...
by 1024MAK
Thu Jun 13, 2019 12:37 pm
Forum: Hardware
Topic: White screen and no cursor at all
Replies: 38
Views: 1298

Re: White screen and no cursor at all

👍 :D

Mark
by 1024MAK
Thu Jun 13, 2019 2:15 am
Forum: Development
Topic: New hardware I/O board using Parallax Propeller
Replies: 12
Views: 250

Re: New hardware I/O board using Parallax Propeller

I’m not sure if there is another source for ready made ZX81 edge-connectors, but I posted some sources for ZX Spectrum ready made edge-connectors over on Spectrum Computing forums.

Mark
by 1024MAK
Sun Jun 09, 2019 7:16 pm
Forum: Hardware
Topic: White screen and no cursor at all
Replies: 38
Views: 1298

Re: White screen and no cursor at all

Just checked my order history on Sell My Retro and it appears I have fitted 24 like this! I have not had to move R1 much from there on any of them. I believe PokeMon sets them up for one ULA type before sending them out... So you should only need to adjust them slightly if using the same ULA type. ...
by 1024MAK
Thu Jun 06, 2019 7:34 pm
Forum: Welcome Area
Topic: Took me almost 40 years...
Replies: 2
Views: 87

Re: Took me almost 40 years...

Welcome on board Paul!

:D :D :D

Hello. A warm welcome to Sinclair ZX World.

I hope you have fun here :D

Mark
by 1024MAK
Thu Jun 06, 2019 7:32 pm
Forum: Welcome Area
Topic: How the ZX80 changed my life
Replies: 3
Views: 249

Re: How the ZX80 changed my life

Welcome on board Geoff!

:D :D :D

Hello. A warm welcome to Sinclair ZX World.

We do try to avoid the Brexit subject here :mrgreen:

Mark
by 1024MAK
Tue Jun 04, 2019 9:20 pm
Forum: Development
Topic: Hires on a ZX80
Replies: 9
Views: 381

Re: Hires on a ZX80

How much RAM does your program need?
1K?
4K?
16K?

Mark
by 1024MAK
Mon Jun 03, 2019 6:37 am
Forum: SALES
Topic: ZX81 ULA
Replies: 70
Views: 16038

Re: ZX81 ULA

If we hear a shriek of joy from Barcelona, we will know why :lol:

Mark
by 1024MAK
Mon May 27, 2019 9:18 pm
Forum: Emulators
Topic: ZX81 emulator for iOS
Replies: 81
Views: 13320

Re: ZX81 emulator for iOS

kpalser wrote:
Mon May 27, 2019 5:05 pm
It’s been a while since I’ve posted on this topic thread. A new update (v1.6.0) has just been released on the App Store, which incorporates Chroma colour support.
Great news 👍 :D 👏

Mark