Search found 94 matches

by hicks
Wed Nov 04, 2020 9:34 pm
Forum: new bbc and electron games from 'retro software'
Topic: Elementum for Electron and BBC Micro/Master
Replies: 42
Views: 2771

Re: Elementum for Electron and BBC Micro/Master

Marvin wrote:
Mon Nov 02, 2020 12:36 am
Noooooo!

I really don't want to know how many times I've "died", It's got to be in the many hundreds by now... :lol:

And as for adding a harder mode, that's just sadistic :D
If it only shows you at the end of each level, it might not be so demoralising :)
by hicks
Wed Nov 04, 2020 8:52 pm
Forum: for sale / freebies
Topic: Electron SD Interface & SW Ram Expansion
Replies: 58
Views: 7864

Re: Electron SD Interface & SW Ram Expansion

Thanks for the details, I've soldered 1.27mm pitch (DRV8805) but never tried anything smaller, so I'll just have to avoid breaking it :mrgreen: Reading through the manual this bit has me wondering: Do NOT load such games into a sideways ROM bank, as the game may take over the Electron at boot time a...
by hicks
Mon Nov 02, 2020 10:24 pm
Forum: 8-bit acorn software: classic games
Topic: Demystifying Nightworld
Replies: 31
Views: 3775

Re: Demystifying Nightworld

I really want to fully read this thread, but for some reason I kinda enjoy this game and don't want to spoil things at least not until I tire of it :D It's good to know at least it can be completed, I was starting to wonder.
by hicks
Mon Nov 02, 2020 4:50 pm
Forum: 8-bit acorn hardware
Topic: Which BBC model to get?
Replies: 6
Views: 379

Which BBC model to get?

I know for many on here the question is invalid and it should be "Which BBC model to get first?" :lol: however for the purposes of this, I intend to buy one and one model only :^o I have memories of playing around on the BBC both in primary school (possibly the B or B+) with the little log...
by hicks
Mon Nov 02, 2020 12:53 am
Forum: 8-bit acorn hardware
Topic: Elk Audio Mod
Replies: 3
Views: 264

Re: Elk Audio Mod

For extra credit if anyone fancies attempting this. I expect you could get a 3.5mm socket that lets you break a connection when a plug is inserted. Switching between the internal speaker to be used or headphone/TV automatically. I might look into that another day. Yup did that 30+ years ago, I used...
by hicks
Mon Nov 02, 2020 12:05 am
Forum: new bbc and electron games from 'retro software'
Topic: Elementum for Electron and BBC Micro/Master
Replies: 42
Views: 2771

Re: Elementum for Electron and BBC Micro/Master

This looks great, will give it a go on the Elk. You mention adding finite lives mode, have you also considered a running deaths counter. That way even when you don't complete the game you can feel a sense of achievement for getting to level X with only 176 deaths this time :) vvvvv (on steam) has a ...
by hicks
Sun Nov 01, 2020 5:57 pm
Forum: 8-bit acorn hardware
Topic: Elk Audio Mod
Replies: 3
Views: 264

Elk Audio Mod

I know using the speaker header and a modified scart cable to get audio to a TV is a path well trodden, however, I wasn't keen on the idea of de-soldering the RF box or clipping the wires to use the RF connector for audio out. I want to keep everything working regardless of whether I'll actually use...
by hicks
Sun Nov 01, 2020 11:14 am
Forum: 8-bit acorn hardware
Topic: Electron ULA Basic Board
Replies: 89
Views: 6094

Re: Electron ULA Basic Board

Based on this, the issue must be within the video part of the ULA. So I'm reworking the video counters based on Hick's work to understand the original ULA schematics that we got from Harry Barman, one of the developers: https://stardot.org.uk/forums/viewtopic.php?f=3&t=13818&p=190426#p18144...
by hicks
Sat Oct 31, 2020 10:11 pm
Forum: for sale / freebies
Topic: Electron SD Interface & SW Ram Expansion
Replies: 58
Views: 7864

Re: Electron SD Interface & SW Ram Expansion

Oops! :D If it's any consolation, sales on EBay are what funds development of new designs. So you've helped make sure I'll be able to keep releasing new stuff for the Electron in future. I just did the same #-o was about to cancel and order via you here until reading the above and realising it's yo...
by hicks
Tue Jun 11, 2019 12:32 am
Forum: 8-bit acorn hardware
Topic: Plus1 Joystick ADC Noise?
Replies: 2
Views: 511

Plus1 Joystick ADC Noise?

I don't own a Plus1 for my Electron, but I'm curious if someone who does could output the values the ADC returns for a Joystick that's at Min X, centred and Max X. I'm curious as to whether the ADC will return exactly 0 and 255 at the limits, or if there's some noise likely. If so how much does it s...
by hicks
Sun Jul 15, 2018 12:42 am
Forum: 8-bit acorn software: other
Topic: Electron Demos
Replies: 7
Views: 1131

Re: Electron Demos

I saved the files to UEF for you using BeebEm. The Bones demo doesn't sound quite right in ElectrEm. Here's how it should sound: http://bbcmicro.co.uk/jsbeeb/play.php?patch=@bc09,3e0:43482E222B2E424F4E4553220d;@bc09,2d8:e0;@bc09,2e1:ed;&disc=http://bbcmicro.co.uk//gameimg/discs/1411/Animation.d...
by hicks
Sat Jul 14, 2018 8:54 pm
Forum: 8-bit acorn software: other
Topic: Electron Demos
Replies: 7
Views: 1131

Re: Electron Demos

I don't have any way to load disks :( Are there any PC based utils to convert that to a tape uef?
by hicks
Sat Jul 14, 2018 8:04 pm
Forum: 8-bit acorn software: other
Topic: Electron Demos
Replies: 7
Views: 1131

Electron Demos

After making a passing remark earlier about doubting there's any Electron Demos (as in demo scene), a quick google appears to prove that doubt was misplaced :roll: Now I'm curious if there were more than just a couple of demos? There's quite a few for the BBC, but I only found a couple of demos on y...
by hicks
Thu Jul 12, 2018 4:18 pm
Forum: 8-bit acorn hardware
Topic: Proposed: "The Ultimate Electron Upgrade"
Replies: 557
Views: 61910

Re: Proposed: "The Ultimate Electron Upgrade"

I'll be working with DaveB's current design. I'll add test points where ever he needs them! Dave H :D I guess since it's using a pin socket it'll be easy enough to gain access to all the ULA pins anyway for scoping out issues, unlike with the original socketed ULA. A kind forum member sent me an is...
by hicks
Wed Jul 11, 2018 4:34 pm
Forum: 8-bit acorn hardware
Topic: Proposed: "The Ultimate Electron Upgrade"
Replies: 557
Views: 61910

Re: Proposed: "The Ultimate Electron Upgrade"

I could send you the DXF of the 'spreader' interface PCB, if that would help? Couldn't harm to look :) Current design replaces the ULA socket with standard turned-pin sockets. Do you have a link to the socket you're using for that? Whilst I think on, are you planning to add test points for each ULA...
by hicks
Tue Jul 03, 2018 6:42 pm
Forum: 8-bit acorn hardware
Topic: Proposed: "The Ultimate Electron Upgrade"
Replies: 557
Views: 61910

Re: Proposed: "The Ultimate Electron Upgrade"

I'm interested in one (price allowing). I assume you'll include a JTag header to program/update? I'd be interested in making a version of my ULA for it. That was one of the plans I had before I started the FPGA core but building the HW for it and fitting the socket was a bit of a sticking point that...
by hicks
Mon Jul 02, 2018 11:33 pm
Forum: general
Topic: BBC releases computer history archive
Replies: 127
Views: 11211

Re: BBC releases computer history archive

Ahh, but most computers in the 1970s, 1980s and 1990s don't actually produce a proper interlaced output. Instead they just produce a single field, then repeat the same field (and if doing animation, with different picture information). So on a large-ish screen CRT, you can see faint horizontal line...
by hicks
Sun Jul 01, 2018 10:58 pm
Forum: 8-bit acorn hardware
Topic: Proposed: "The Ultimate Electron Upgrade"
Replies: 557
Views: 61910

Re: Proposed: "The Ultimate Electron Upgrade"

One of the big problems, for some potential users, is the removal of the ULA socket without damaging any of the tracks. I had planned to build a good sized batch of maybe 50 and offer a fitting service for those that can't. I'd be very wary of anyone having-a-go and then blaming the problem on the ...
by hicks
Sun Jul 01, 2018 10:43 pm
Forum: 8-bit acorn hardware
Topic: Proposed: "The Ultimate Electron Upgrade"
Replies: 557
Views: 61910

Re: Proposed: "The Ultimate Electron Upgrade"

As a slight aside from the ULA upgrade, on the previous page of this thread I was asking about a test program hoglet had written that showed interrupts firing and how my core appeared to differ in the first couple of values and if run without a soft reset I had A0 rather than B0 showing. I'd forgott...
by hicks
Sun Jul 01, 2018 10:34 pm
Forum: 8-bit acorn hardware
Topic: Electron ULA Schematics
Replies: 45
Views: 6931

Re: Electron ULA Schematics

There's just one part of the cassette schematic that I'm not quite sure about. CASSRST interplay with DATACNT. I'm hazarding a guess that this may be what causes a 0 to end up in CDATA after loading finishes. As noted in previous post, a 0 present in CDATA can act as both a start and stop bit, even ...
by hicks
Sun Jul 01, 2018 2:03 pm
Forum: 8-bit acorn hardware
Topic: Proposed: "The Ultimate Electron Upgrade"
Replies: 557
Views: 61910

Re: Proposed: "The Ultimate Electron Upgrade"

What kind of market do you think there is for a replacement and/or "enhanced" ULA for the Elk ? I mean I'd like one too, but when I consider the time/cost involved in converting my fpga ULA code over to work as a drop in replacement, it's hard to justify doing it when there's so many other...
by hicks
Thu Jun 28, 2018 1:03 pm
Forum: general
Topic: BBC releases computer history archive
Replies: 127
Views: 11211

Re: BBC releases computer history archive

What were you hoping to achieve? Nothing in particular, but it'd be nice to be able to legally distribute the ROMs for the Electron/BBC both in terms of FPGA cores and for emulators. Also, never know what comments in source might reveal that can be missed when reviewing disassembled versions. Plain...
by hicks
Thu Jun 28, 2018 9:32 am
Forum: general
Topic: BBC releases computer history archive
Replies: 127
Views: 11211

Re: BBC releases computer history archive

I should have known I wouldn't need to mention it here and that you'd all already know :D Lots to watch, this is great. I wonder if the BBC could be persuaded in the name of preserving history, to spend some resources tracking down the current rights holder of the BBC's OS and open it all up. I assu...
by hicks
Thu Jun 28, 2018 12:24 am
Forum: 8-bit acorn hardware
Topic: Electron ULA Schematics
Replies: 45
Views: 6931

Re: Electron ULA Schematics

The findings of this thread left me wondering how the cassette logic was handling the stop bit, especially why 1/2 a stop bit worked. I had time to look over the cassette logic again this evening whilst working on a turbo mode for my fpga. I think I understand more of why the 1/2 stop bit works. If ...
by hicks
Thu May 03, 2018 8:31 pm
Forum: 8-bit acorn hardware
Topic: Electron: net purpose of Q3, Q4, R66, R67, C11, C25?
Replies: 10
Views: 1618

Re: Electron: net purpose of Q3, Q4, R66, R67, C11, C25?

Aside from the couple of wav files that ltspice generated, the rest of the captures were just the images of the oscilloscope traces.
by hicks
Thu May 03, 2018 4:54 pm
Forum: 8-bit acorn hardware
Topic: Electron: net purpose of Q3, Q4, R66, R67, C11, C25?
Replies: 10
Views: 1618

Re: Electron: net purpose of Q3, Q4, R66, R67, C11, C25?

I didn't have any sample files for the above tests. I just used the BASIC commands on the Acorn to output low/high frequency tones, then generated the same frequency tone in LTSpice. Although LTSpice does spit out a few wav files as part of running the simulation if that is what you're referring to?...
by hicks
Mon Apr 30, 2018 10:27 pm
Forum: 8-bit acorn hardware
Topic: Electron: net purpose of Q3, Q4, R66, R67, C11, C25?
Replies: 10
Views: 1618

Re: Electron: net purpose of Q3, Q4, R66, R67, C11, C25?

This blog post might be of some help. I simulated the effects of those components when working on improving my FPGA Electron core's sound output. The oscilloscope waveforms from fpga were just not a good match to the real electron and those components were why.
by hicks
Wed Apr 04, 2018 10:25 pm
Forum: 8-bit acorn hardware
Topic: Ferranti cell types
Replies: 2
Views: 974

Re: Ferranti cell types

Thanks for the links :)
by hicks
Sun Jan 28, 2018 9:14 pm
Forum: 8-bit acorn hardware
Topic: Ferranti cell types
Replies: 2
Views: 974

Ferranti cell types

Just read through the thread about the BBC Tube ULA reversing and in particular this post which shows one of the diagrams from Chris' ZX Spectrum book. I'm interested in looking into the Electron ULA (few questions I'd like to find answers to) and the cell used in that matches the ULA6000 series cel...
by hicks
Wed Jan 17, 2018 4:53 pm
Forum: 8-bit acorn hardware
Topic: Plus1 Slogger ROM without cart joy interface?
Replies: 7
Views: 1159

Re: Plus1 Slogger ROM without cart joy interface?

davidb wrote:There was a program published in Electron User called JOYPLUS that mapped input from joysticks plugged into the Plus 1 to key presses.
I'll take a look thanks :)

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