Search found 5825 matches

by danielj
Sat May 19, 2018 8:51 pm
Forum: hardware
Topic: Torch Z80 Problems
Replies: 33
Views: 342

Re: Torch Z80 Problems

The Torch works in a completely different fashion to the Acorn coprocessors - I don't think you can draw anything from that specifically. But we can be fairly sure that something on there is buggered. If the 6522 is socketed, swap it with the system via on your BBC Micro and see if the beeb still wo...
by danielj
Sat May 19, 2018 6:07 pm
Forum: hardware
Topic: Cheap web-modem for the beeb/master (and arc if ya like!)
Replies: 58
Views: 1561

Re: Cheap web-modem for the beeb/master (and arc if ya like!)

Well done! - Did you manage to get commstar V2 to work with it and viewdata? I couldn't get to grips with it :?

d.
by danielj
Sat May 19, 2018 4:14 pm
Forum: hardware
Topic: Cheap web-modem for the beeb/master (and arc if ya like!)
Replies: 58
Views: 1561

Re: Cheap web-modem for the beeb/master (and arc if ya like!)

Small update to the firmware - firstly sorting out the method used for ensuring background processes take place, secondly ensuring that when HW flow control is enabled, that it gets re-instigated post baud rate change. Tested CCl4 at 9600bps with hardware flow control enabled (max that you can do th...
by danielj
Sat May 19, 2018 2:43 pm
Forum: hardware
Topic: Cheap web-modem for the beeb/master (and arc if ya like!)
Replies: 58
Views: 1561

Re: Cheap web-modem for the beeb/master (and arc if ya like!)

Yes, that'd potentially do it as the beeb won't think it can send.

d.
by danielj
Sat May 19, 2018 2:21 pm
Forum: hardware
Topic: Cheap web-modem for the beeb/master (and arc if ya like!)
Replies: 58
Views: 1561

Re: Cheap web-modem for the beeb/master (and arc if ya like!)

No, you're probably nearly there. Which version of the firmware are you using? With or without the flow control? Depending on when you downloaded it, it may have had the flow control in by default, the current version has it disabled? d. Edit: More: Check you've set both send and receive to 2400bps ...
by danielj
Sat May 19, 2018 8:45 am
Forum: hardware
Topic: Cheap web-modem for the beeb/master (and arc if ya like!)
Replies: 58
Views: 1561

Re: Cheap web-modem for the beeb/master (and arc if ya like!)

OK - confirm that hardware flow control is working with the NodeMCU on the beeb :)
by danielj
Fri May 18, 2018 11:26 am
Forum: hardware
Topic: Cartridge slots
Replies: 8
Views: 270

Re: Cartridge slots

If you had a plus 1 plugged in, there wasn't a "through" expansion connector. That and it was also neater than extending further and further backwards I guess?

http://lionels.orpheusweb.co.uk/CompNyb ... ctron.html (just missing a plus 3 there :D)

d.
by danielj
Thu May 17, 2018 8:48 pm
Forum: emulators
Topic: Mac Arculator
Replies: 12
Views: 1132

Re: Mac Arculator

Allegro 4 won't compile on the mac at all anymore. If someone's managed it I'd love to know?

d.
by danielj
Thu May 17, 2018 8:38 pm
Forum: general
Topic: Today I received.....
Replies: 4568
Views: 301276

Re: Today I received.....

Great work Tricky :) - I've been really happy with JLC! The price is outrageously good.

d.
by danielj
Thu May 17, 2018 8:19 pm
Forum: hardware
Topic: Cheap web-modem for the beeb/master (and arc if ya like!)
Replies: 58
Views: 1561

Re: Cheap web-modem for the beeb/master (and arc if ya like!)

I've added schematics/PCB layout to the github repository now, so standalone direct-plug-in units can be built. Note, the PCB is as yet completely untested! It should, however, work with the firmware on the stardot repo.

d.
by danielj
Thu May 17, 2018 2:09 pm
Forum: hardware
Topic: Torch Z80 Problems
Replies: 33
Views: 342

Re: Torch Z80 Problems

It'll be something on the torch board - there's no magic around the Tube - it's really just data/address lines straight from the processor.

d.
by danielj
Thu May 17, 2018 1:31 pm
Forum: hardware
Topic: Cheap web-modem for the beeb/master (and arc if ya like!)
Replies: 58
Views: 1561

Re: Cheap web-modem for the beeb/master (and arc if ya like!)

Perfect. Yup, 7 and 8 on the nodemcu. It'll be tomorrow when I manage to check what it's doing properly, but I suspect it's actually working! I'll tweak the hardware I've been putting together to have a jumper to select hardware flow, and also make sure 13/15 are used for the control lines to the rs...
by danielj
Wed May 16, 2018 9:09 pm
Forum: hardware
Topic: Cheap web-modem for the beeb/master (and arc if ya like!)
Replies: 58
Views: 1561

Re: Cheap web-modem for the beeb/master (and arc if ya like!)

It's most important for the beeb to stop it sending - I don't think the ESP is going to have too much trouble dealing with the data hurtling out of an 8bit machine through an ACIA :D - What I will do is try and see if it's just my FTDI dongle that's being grumpy or whether it's really not pushing ou...
by danielj
Wed May 16, 2018 8:48 pm
Forum: hardware
Topic: Cheap web-modem for the beeb/master (and arc if ya like!)
Replies: 58
Views: 1561

Re: Cheap web-modem for the beeb/master (and arc if ya like!)

Yes - so it sees the computer's RTS and sends the initial text, but it never asserts RTS itself, or at least not so far as the FTDI's concerned, so with hardware flow turned on the PC will never send anything to the ESP as it never thinks it's ready - if I turn off hardware flow it's fine so long as...
by danielj
Wed May 16, 2018 6:38 pm
Forum: hardware
Topic: Cheap web-modem for the beeb/master (and arc if ya like!)
Replies: 58
Views: 1561

Re: Cheap web-modem for the beeb/master (and arc if ya like!)

Nearly there - I think that's the wrong pinmode for GPIO15 though, it's never giving the FTDI a signal that it's clear to send. Definitely responding to RTS. Is there a list of these anywhere?
by danielj
Wed May 16, 2018 6:11 pm
Forum: hardware
Topic: Cheap web-modem for the beeb/master (and arc if ya like!)
Replies: 58
Views: 1561

Re: Cheap web-modem for the beeb/master (and arc if ya like!)

So, that HW-flow register twiddling doesn't seem to work - at least with my FTDI-USB - I need to have a prod at it with the scope to see if those pins are actually doing anything, but it's behaving as if there's no HW-Flow control.

d.
by danielj
Wed May 16, 2018 2:12 pm
Forum: hardware
Topic: Cheap web-modem for the beeb/master (and arc if ya like!)
Replies: 58
Views: 1561

Re: Cheap web-modem for the beeb/master (and arc if ya like!)

They seem to be out of stock at CPC, but do have the 'locking' version. Any idea if that will fit, or does the locking mechanism get in the way? http://cpc.farnell.com/deltron-enclosures/590-0520/5-pin-domino-locking-din-plug/dp/CN00046 Couldn't guarantee it, but it looks like the locking bit is op...
by danielj
Wed May 16, 2018 1:11 pm
Forum: hardware
Topic: Torch Z80 Problems
Replies: 33
Views: 342

Re: BBC + Torch Z80 Help

Confusion rules. :) By the sounds of things you have the right ROM in your machine, the ABL one is for the 8271. Back to checking if the Torch works... You don't need system discs to run CCPN - if it's all good, you'll get the CPN prompt (basically CP/M in ROM).

:)

d.
by danielj
Wed May 16, 2018 12:07 pm
Forum: hardware
Topic: Torch Z80 Problems
Replies: 33
Views: 342

Re: BBC + Torch Z80 Help

Thank goodness for fresh eyes... (I only ever find myself reading the bottom couple of posts in a thread)

Indeed - exactly as Paul says => put the original ROMs back in and see what happens.
by danielj
Wed May 16, 2018 10:47 am
Forum: hardware
Topic: Cheap web-modem for the beeb/master (and arc if ya like!)
Replies: 58
Views: 1561

Re: Cheap web-modem for the beeb/master (and arc if ya like!)

That's a good start! :D *holds breath* =D> :) (just to note, there's a 1ms delay I stuck in to stop it crashing out with a software exception when background processes aren't serviced frequently enough, I intend take that out and create other opportunities to yield to background processes in the mai...
by danielj
Wed May 16, 2018 9:11 am
Forum: hardware
Topic: Torch Z80 Problems
Replies: 33
Views: 342

Re: BBC + Torch Z80 Help

For checking the Z80 side of things, although not identical, this will be helpful! http://chrisacorns.computinghistory.org ... procSM.pdf

d.
by danielj
Wed May 16, 2018 9:10 am
Forum: hardware
Topic: Torch Z80 Problems
Replies: 33
Views: 342

Re: BBC + Torch Z80 Help

(I'd actually look to see if the processor's running first, but the 6522 is something you can check using your beeb, and not using an oscilloscope!)

d.
by danielj
Wed May 16, 2018 9:03 am
Forum: hardware
Topic: Cheap web-modem for the beeb/master (and arc if ya like!)
Replies: 58
Views: 1561

Re: Cheap web-modem for the beeb/master (and arc if ya like!)

Daniel, In the technical reference for the EPS8266 there is some information on enabling RTS/CTS flow control in 11.3.10: https://www.espressif.com/sites/default/files/documentation/esp8266-technical_reference_en.pdf#page=89 The functions referred to, e.g. UART_SetFlowControl, appear to be part of ...
by danielj
Wed May 16, 2018 8:58 am
Forum: hardware
Topic: Cheap web-modem for the beeb/master (and arc if ya like!)
Replies: 58
Views: 1561

Re: Cheap web-modem for the beeb/master (and arc if ya like!)

So as far as I can tell, those won't take it to the +5V and -5V levels needed for RS423, and certainly won't take it to the levels needed for RS232 (+/-10V). You need a MAX3232 to do that. Those boards just convert the 3.3V to 5V for arduino. So, that whole set up is just designed to plug into an ar...
by danielj
Wed May 16, 2018 8:33 am
Forum: hardware
Topic: Torch Z80 Problems
Replies: 33
Views: 342

Re: BBC + Torch Z80 Help

So, firstly make sure the ports are clean. Second thing that'd I'd suspect is the 6522 VIA - remove that and try it in a beeb. If the VIA's dead (they're not super-reliable when old) then replacing that should get things talking. Assuming the VIA's OK you need to start checking whether the CPU is ge...
by danielj
Tue May 15, 2018 7:02 am
Forum: hardware
Topic: Cheap web-modem for the beeb/master (and arc if ya like!)
Replies: 58
Views: 1561

Re: Cheap web-modem for the beeb/master (and arc if ya like!)

Curses - he only put the binaries up, not the source :( . It's OK though, I'm going to experiment with it at the software level - it looks like the hardware side isn't really properly implemented in the arduino libraries.

d.
by danielj
Mon May 14, 2018 9:46 pm
Forum: hardware
Topic: Cheap web-modem for the beeb/master (and arc if ya like!)
Replies: 58
Views: 1561

Re: Cheap web-modem for the beeb/master (and arc if ya like!)

(I should add that I've got a pcb layout done pending firmware testing. Assumitall is good it'll be unleashed :D)
by danielj
Mon May 14, 2018 9:44 pm
Forum: hardware
Topic: Cheap web-modem for the beeb/master (and arc if ya like!)
Replies: 58
Views: 1561

Re: Cheap web-modem for the beeb/master (and arc if ya like!)

Thanks Mark! So far so what I've got :D it's the firmware source that's going to be the thing that gives it away.
by danielj
Mon May 14, 2018 9:27 pm
Forum: hardware
Topic: Torch Z80 Problems
Replies: 33
Views: 342

Re: BBC + Torch Z80 Help

Do you have an oscilloscope/logic analyser?
by danielj
Mon May 14, 2018 6:49 pm
Forum: other vintage computer hardware, software and games
Topic: Some Apple II's needing TLC at Hampshire ABUG
Replies: 6
Views: 193

Re: Some Apple II's needing TLC at Hampshire ABUG

1" on the 0.47uF, the other is the same as the beeb :D (iirc!) - there are additional holes there, so it can take a variety of different pitches.

d.