Search found 2234 matches

by 1024MAK
Sat Mar 16, 2019 9:18 am
Forum: Hardware
Topic: ZX81 Mod
Replies: 1
Views: 98

Re: ZX81 Mod

Not seen the video yet. But just going on the photo, the 74LS32 chip is four two input OR gates. It is mounted on what looks like some prototyping matrix board that either has a tinned ground plane on top or it is painted silver. It’s not a metal heatsink. I would speculate that the OR gates in the ...
by 1024MAK
Fri Mar 15, 2019 7:34 pm
Forum: Software
Topic: Converting TAP to WAV files for Spectrum
Replies: 4
Views: 173

Re: Converting TAP to WAV files for Spectrum

McKlaud wrote:
Fri Mar 15, 2019 5:23 pm
@Andy Rea: yes, some software would not work on +3 series due to lack of the floating bus in this model.
There is a bodge fix for this problem. But the lack of a “floating bus” will not prevent loading.

Mark
by 1024MAK
Fri Mar 15, 2019 12:34 pm
Forum: Software
Topic: Converting TAP to WAV files for Spectrum
Replies: 4
Views: 173

Re: Converting TAP to WAV files for Spectrum

The ZX Spectrum +3 may need an audio source with a louder signal. Often an amplifier is needed. Also note that although the socket on the +3 is a two channel “stereo’ 3.5mm type, one channel is tape/sound out, the other channel being the input from the cassette tape. So either a special cable is nee...
by 1024MAK
Thu Mar 14, 2019 1:12 pm
Forum: Hardware
Topic: Hello All & Dead ZX .. probably
Replies: 16
Views: 458

Re: Hello All & Dead ZX .. probably

Good to hear that you are up and running (well, once you have sorted the keyboard) :D

Mark
by 1024MAK
Thu Mar 14, 2019 1:09 pm
Forum: ZX Spectrum Lounge
Topic: Zx spectrum 128k
Replies: 3
Views: 161

Re: Zx spectrum 128k

Actually, apart from a small number of extra commands, the BASIC itself is the same. The 128K BASIC however uses a full screen editor instead of a line editor. This new editor accepts command words and function words as normal typed in, letter by letter entry rather than the 16k/48k keyword entry sy...
by 1024MAK
Mon Mar 11, 2019 11:01 am
Forum: Hardware
Topic: Cleaning ZX81 16k RAM pack and edge connector
Replies: 2
Views: 135

Re: Cleaning ZX81 16k RAM pack and edge connector

First, to remove any oils or grease (from people handling it) clean the edge-connected and the socket with IPA (Isopropyl alcohol) using a toothbrush (but not one you use for your teeth, buy a new one for this). Be careful and don’t splash any IPA in your eyes. Then use a cloth or paper towel to fin...
by 1024MAK
Tue Mar 05, 2019 4:36 pm
Forum: Hardware
Topic: Hello All & Dead ZX .. probably
Replies: 16
Views: 458

Re: Hello All & Dead ZX .. probably

Modern TVs, if they can’t detect the back porch part of the video signal, they get their auto calibration of the black video level wrong. This results in a very dark image even with the brightness and contrast turned up to full or nearly full.

Mark
by 1024MAK
Tue Mar 05, 2019 3:48 pm
Forum: Hardware
Topic: Hello All & Dead ZX .. probably
Replies: 16
Views: 458

Re: Hello All & Dead ZX .. probably

Hello and welcome to our forum :D 2. This is an initial version with the curly lines.. is it supposed to work bare like this or am I missing something like an extra board (I read it had a 'required' extra board) The ZX81 was designed to be a very low cost computer, so the built in RAM was only 1k by...
by 1024MAK
Sun Mar 03, 2019 3:08 pm
Forum: ZX Spectrum Lounge
Topic: Why did the sinclair QL fail?
Replies: 2
Views: 268

Re: Why did the sinclair QL fail?

what went wrong? Nothing AND everything! Once Sinclair had sorted out the production problems, the machine as sold met the specifications set by Sinclair. Sinclair only did research into the intended market after producing this computer! It was launched well before it was ready for mass production....
by 1024MAK
Sat Feb 23, 2019 9:42 pm
Forum: Welcome Area
Topic: New member from the UK rediscovering ZX’s
Replies: 5
Views: 308

Re: New member from the UK rediscovering ZX’s

Welcome on board Dave!

:D :D :D

Enjoy the forum :D

Shout out if you need help :mrgreen:

Mark