Search found 2539 matches

by 1024MAK
Mon Nov 18, 2019 10:27 pm
Forum: Software
Topic: Rocket Man - Commented Disassembly
Replies: 10
Views: 1792

Re: Rocket Man - Commented Disassembly

bivvyfox wrote:
Mon Nov 18, 2019 7:01 pm
Hi. Hope you don't mind a thread resurrection. But the links here from the www.fruitcake.plus.com site are all down.
More info about the site being down here.

Mark
by 1024MAK
Sun Nov 17, 2019 1:37 pm
Forum: Hardware
Topic: Russian PCB ZX80 clone problem
Replies: 20
Views: 331

Re: Russian PCB ZX80 clone problem

Here are the contents of the first 21 memory locations in a ZX80 ROM:
ZX80 ROM, first 21 locations
ZX80 ROM, first 21 locations
Mark
by 1024MAK
Sun Nov 17, 2019 1:27 pm
Forum: Hardware
Topic: Russian PCB ZX80 clone problem
Replies: 20
Views: 331

Re: Russian PCB ZX80 clone problem

If you don’t have a EPROM/EEPROM programmer, but do have a breadboard, it’s fairly simple to wire up the EPROM to produce an output. This would just be a simple test to check an address where a value that is not 255 (0xFF) should be present. The pin out of the chips used in a ZX81 are linked to a po...
by 1024MAK
Sat Nov 16, 2019 8:49 pm
Forum: Hardware
Topic: Purpose of this Save/Loading device?
Replies: 9
Views: 324

Re: Purpose of this Save/Loading device?

CMOS CD40106BE chips can be persuaded to operate as cheap amplifiers. It looks like there is also two transistors on the board. The board looks like a homemade PCB. The switch next to the red LED looks like the power on/off switch. Any chance of reporting the type number of the transistors and posti...
by 1024MAK
Fri Nov 15, 2019 9:00 pm
Forum: ZX Spectrum Lounge
Topic: Why was the UK so slow to adopt the Disk Drive
Replies: 2
Views: 208

Re: Why was the UK so slow to adopt the Disk Drive

See this thread where a similar question was asked...

Mark
by 1024MAK
Fri Nov 15, 2019 4:01 pm
Forum: Hardware
Topic: Can’t load from tape when connected to my CRT TV
Replies: 8
Views: 168

Re: Can’t load from tape when connected to my CRT TV

It is indeed recommended not to have both the Ear and Mic plugs connected at the same time. This is because some cassette decks have a ‘monitor’ facility (so that when headphones/ an earpiece is being used, the user can monitor the audio that is being recorded). It is also recommended to have both t...
by 1024MAK
Fri Nov 15, 2019 9:56 am
Forum: Hardware
Topic: Can’t load from tape when connected to my CRT TV
Replies: 8
Views: 168

Re: Can’t load from tape when connected to my CRT TV

LCD are based on glass. Everything (you may not want to know) about LCDs is here . CRT displays do produce a strong 15625 Hz signal, this is from the horizontal/line output stage. Young humans can often hear this, as it is within their audio range (alas, I can no longer hear it, so that means I am n...
by 1024MAK
Thu Nov 14, 2019 11:38 pm
Forum: Hardware
Topic: Can’t load from tape when connected to my CRT TV
Replies: 8
Views: 168

Re: Can’t load from tape when connected to my glass screen TV

Err, okay, I admit it, I’ve not been in Curry’s for a while now, so am not up-to-date with the latest marketing ‘buzz’ words in TV box shifting, so what is a ‘glass screen telly’? Only CRT tellies were rather heavy with the glass screeen/CRT tube. And the LCD TVs that I have, have glass displays. So...
by 1024MAK
Thu Nov 14, 2019 11:39 am
Forum: Hardware
Topic: Russian PCB ZX80 clone problem
Replies: 20
Views: 331

Re: Russian PCB ZX80 clone problem

Hello, I am back, with my "Russian ZX80 PCB" build. I am done building ZX80 kit (the one bought from Ebay, so-called Russian PCB), but it just does not start. Hello Do you have a multimeter? If yes, what type / model? Do you have a logic probe? If not, are you prepared to buy one, or make your own ...
by 1024MAK
Wed Nov 13, 2019 5:55 pm
Forum: SALES
Topic: Lardo buys another zeddy
Replies: 30
Views: 3350

Re: Lardo buys another zeddy