Search found 1297 matches

by Pr0f
Fri Mar 15, 2024 8:38 am
Forum: Hardware
Topic: RTC Query
Replies: 25
Views: 782

Re: RTC Query

esp32_ser.jpgHey Pr0f ; Someone was way ahead of me :D Anyway its great to try to program such nice connection. And one can make your own preferences. I do like the lilygo products though - and there is probably a lot more this could potentially offer - would be interesting to see how well it works...
by Pr0f
Fri Mar 15, 2024 7:12 am
Forum: Hardware
Topic: RTC Query
Replies: 25
Views: 782

Re: RTC Query

I wonder if those serial network modems would provide time?

https://www.simulant.uk/shop/retro-vint ... compatible
by Pr0f
Tue Mar 12, 2024 9:53 am
Forum: Hardware
Topic: RTC Query
Replies: 25
Views: 782

Re: RTC Query

The other approach would be to use an RTC chip that actually does have a "seconds counter" and just disable the ZX8302 whenever a read access to those RTC addresses is made - and provide the data from the seconds counter RTC chip instead. No I2C needed - as the code in the QL is already se...
by Pr0f
Tue Mar 12, 2024 8:51 am
Forum: Hardware
Topic: RTC Query
Replies: 25
Views: 782

Re: RTC Query

The Minerva MKII has I2C interface and does have an on board I2C RTC and RAM chip.

There is a project ongoing on here to recreate the PCB for that - the code is already in the Minerva ROM
by Pr0f
Tue Mar 05, 2024 4:51 pm
Forum: The Off-Topic Section
Topic: Today I Received...
Replies: 638
Views: 284326

Re: Today I Received...

I rescued a BBC Basic manual from a school I worked out - was for RM machines - but it contains the full list of commands. Also since picked up some books on the Z88 that cover BBC Basic - It's a good version of the language.
by Pr0f
Fri Mar 01, 2024 4:27 pm
Forum: Hardware
Topic: Thor 8 with no keyboard
Replies: 7
Views: 499

Re: Thor 8 with no keyboard

I watched those as well, wonder who got them?
by Pr0f
Mon Feb 26, 2024 9:50 am
Forum: Hardware
Topic: Switching Regulator?
Replies: 35
Views: 2017

Re: Switching Regulator?

tofro wrote: Mon Feb 26, 2024 8:44 am Well, I think the answer to the OP's question is as simple as pragmatic: If it works, use it, if it doesn't, don't :)
Love that :-)
by Pr0f
Mon Feb 26, 2024 8:19 am
Forum: Hardware
Topic: Switching Regulator?
Replies: 35
Views: 2017

Re: Switching Regulator?

The only issue I could see is that some of the older switching regulator circuits operate in the lower frequencies and might produce radiated interference that could affect the microdrives, but more modern designs use very high KHz or even MHz range and so this is less likely going to be an issue. A...
by Pr0f
Thu Feb 22, 2024 11:56 am
Forum: Hardware
Topic: Floppy enclosure 3d print
Replies: 7
Views: 309

Re: Floppy enclosure 3d print

That's nice :-)
by Pr0f
Sat Feb 17, 2024 11:13 am
Forum: General QL Chat
Topic: My rare old QL version AH
Replies: 22
Views: 1010

Re: My rare old QL version AH

No photo's I'm afraid - but if you look at the issue 5 board - there is a wire link or zero ohm resistor that connects pin 40 to VCC - it's marked on the PCB as a diode - and that's the first clue - this is the VCC for battery - which should be a wired or'd pair of diodes - one that from VCC to pin ...