Search found 2647 matches

by Elminster
Tue Aug 21, 2018 9:25 pm
Forum: hardware
Topic: Model B Video gone fuzzy/corrupt and blurry
Replies: 35
Views: 1753

Re: Model B Video gone fuzzy/corrupt and blurry

Ic14 removed in one piece, socket in, brand new chip protested in my issue 7 fit, same symptoms. Continuity tests now complete for 6845 and video ula, continuity on ic15 next. I suspect ic12 & 13 are next on the list as they do the address decoding, as we know it is not the data decoding chip. But o...
by Elminster
Tue Aug 21, 2018 11:34 am
Forum: hardware
Topic: FreeFi-232 v2
Replies: 93
Views: 2282

Re: FreeFi-232 v2

Parts arrived, if from Mouser. Dodgy parts fro mebay on order. Just need something to glue them to something now.

Is this project now 'completed' or are you still tweaking bits. Has anyone but Daniel actually built the new board yet?
by Elminster
Mon Aug 20, 2018 9:27 pm
Forum: hardware
Topic: Can't get Gotek Flash Floppy working. u56=USB
Replies: 32
Views: 708

Re: Can't get Gotek Flash Floppy working. u56=USB

I'm using the aux socket on a beeb, the serial adapter that I used for programming them and a stand a lone 5V power supply. The beeb is exactly (according to my meter) 5.00V, the USB is 4.98V and I can adjust the other, but have been trying it at 4.9, 5 and 5.1V. My friend was using his on an Amiga...
by Elminster
Mon Aug 20, 2018 9:24 pm
Forum: emulators
Topic: Summary of emulators for 8bit acorns
Replies: 20
Views: 249

Re: Summary of emulators for 8bit acorns

It would be possible to add a subforum to the emulators forum for each system or emulator. So a subforum each for atom, beeb and electron or a subforum each for B-EM, Beebem, elkulator, electron etc. Would this be a useful addition? If so which would be the best way to do it? By system or emulator?...
by Elminster
Mon Aug 20, 2018 9:21 pm
Forum: emulators
Topic: Summary of emulators for 8bit acorns
Replies: 20
Views: 249

Re: Summary of emulators for 8bit acorns

And Docker. :) Much more friendly than wine (IMO). Edit: https://hub.docker.com/r/elminster/ Public should be able to see it but maybe a different link, dont think you need an account, or maybe you do, have to check. Was it you who was talking about minimal docker images for the Xilinx tools recent...
by Elminster
Mon Aug 20, 2018 9:17 pm
Forum: off-topic
Topic: Convert master psu to bench psu
Replies: 25
Views: 582

Re: Convert master psu to bench psu

If the SMPSU (switch mode power supply unit) internally has earth (ground) connected to any of the DC output connections, it's not a floating output. Some SMPSU have earthed outputs, but most do not (and their outputs are floating). The documentation should say which type it is. Or you can test it....
by Elminster
Mon Aug 20, 2018 4:54 pm
Forum: emulators
Topic: Summary of emulators for 8bit acorns
Replies: 20
Views: 249

Re: Summary of emulators for 8bit acorns

You should put up a docker project on github with instructions that get a person from zero to emulation... certainly I won't be playing that game without instructions! It is prebuild. Nothing on github requite, just download image from repository. I did try to explain how to use it in blog, but see...
by Elminster
Mon Aug 20, 2018 4:30 pm
Forum: emulators
Topic: Summary of emulators for 8bit acorns
Replies: 20
Views: 249

Re: Summary of emulators for 8bit acorns

I need to publish the auto build scripts for docker. They take a base install of Linux every time and build from scratch so all the dependencies are there.
by Elminster
Mon Aug 20, 2018 4:02 pm
Forum: emulators
Topic: Summary of emulators for 8bit acorns
Replies: 20
Views: 249

Re: Summary of emulators for 8bit acorns

Sounds good :) I'd expect compilation instructions to be on a projects Github page, or wherever, which should always be current. I agree they should be current. It might be nice to actually test them. I've often found some extra library or component is needed and for a newbie this is very off putti...
by Elminster
Mon Aug 20, 2018 3:56 pm
Forum: emulators
Topic: Summary of emulators for 8bit acorns
Replies: 20
Views: 249

Re: Summary of emulators for 8bit acorns

Sounds good :) I'd expect compilation instructions to be on a projects Github page, or wherever, which should always be current. Yes I dont think we want to duplicate the compile instructions, as Pernod says it should be on Github (or code repo of choice), that way lead. A column that links to buil...
by Elminster
Mon Aug 20, 2018 3:19 pm
Forum: hardware
Topic: Model B Video gone fuzzy/corrupt and blurry
Replies: 35
Views: 1753

Re: Model B Video gone fuzzy/corrupt and blurry

IC14 done now.

Fully connected on all pins.

Tested against IC25, IC33, DRAM (and ULA) and 6502 for relevant pins.

Need to finish continuity on IC6 and IC2 now.
by Elminster
Mon Aug 20, 2018 3:14 pm
Forum: emulators
Topic: Summary of emulators for 8bit acorns
Replies: 20
Views: 249

Re: Summary of emulators for 8bit acorns

Sounds good to me. If you'd leave room also to note whether any Windows-based emulators run happily using WINE on Linux or Mac OS that would be good - that's how I often end up running. (When jsbeeb isn't what I need, and visual6502 isn't either...) And Docker. :) Much more friendly than wine (IMO)...
by Elminster
Mon Aug 20, 2018 3:12 pm
Forum: off-topic
Topic: Convert master psu to bench psu
Replies: 25
Views: 582

Re: Convert master psu to bench psu

The intial SMPSU (36V 6A) has the earth terminal, this then feeds into the DC-DC Buck type 30A/5A unit, that unit only take +/- and has no earth connection. From this you then have you feed to your circuit. The case i have ordered is metal so I planned to earth the case and the main input PSU to mai...
by Elminster
Mon Aug 20, 2018 1:32 pm
Forum: hardware
Topic: Model B Video gone fuzzy/corrupt and blurry
Replies: 35
Views: 1753

Re: Model B Video gone fuzzy/corrupt and blurry

But before we before we explore that area, with the machine switched off, can you please test the data bus lines between the Videoproc (Video ULA) (IC6) and IC14. That is use your meter on a low resistance range (e.g. 200 ohm range) or suitable continuity range. Each data line should correspond so ...
by Elminster
Mon Aug 20, 2018 1:12 pm
Forum: hardware
Topic: Model B Video gone fuzzy/corrupt and blurry
Replies: 35
Views: 1753

Re: Model B Video gone fuzzy/corrupt and blurry

Tried all 3 combinations of RAM.

32k, top 16k and bottom 16k. (i.e. CAS0/ CAS1) Makes no difference to symptoms.
by Elminster
Mon Aug 20, 2018 11:31 am
Forum: software: other
Topic: Master users: What MOS are you running?
Replies: 9
Views: 234

Re: Master users: What MOS are you running?

3.2/3.5 ROM switcher, usually in 3.2 except when it isnt. (both with Y2k fixes and what not)

Always menat to write my own ROM image but never get around to it.
by Elminster
Mon Aug 20, 2018 11:29 am
Forum: hardware
Topic: Model B Video gone fuzzy/corrupt and blurry
Replies: 35
Views: 1753

Re: Model B Video gone fuzzy/corrupt and blurry

Steps 5-6 done without putting machien back into c mode. 4. No visible change to screen 5. CRC does not change in 6 times run over a min (but system not free running). 6. Yes screen changes (after screenshot attached, before is same as fuzzy black screenshot in psot above). But doing a dump of mem a...
by Elminster
Mon Aug 20, 2018 11:24 am
Forum: hardware
Topic: Model B Video gone fuzzy/corrupt and blurry
Replies: 35
Views: 1753

Re: Model B Video gone fuzzy/corrupt and blurry

It might be worth doing a few more tests with ICE-T on the video memory. I would try the following: 1. <return> on the ICE-T to enter command mode, the do RD 0355 to establish the current screen mode, then C to continue (for the rest of these thoughts, I'll assume you know how to use the ICE-T comm...
by Elminster
Mon Aug 20, 2018 10:30 am
Forum: off-topic
Topic: Convert master psu to bench psu
Replies: 25
Views: 582

Re: Convert master psu to bench psu

Was thinking about Earth strapping (aka grounding) and such like, and wodnered whther it is worth adding an Earth (green) binding post to bench psu. Anyone ever use this? I know you can do things like use it for putting psu in series or creating. negatie voltage, but not sure how useful that would be.
by Elminster
Mon Aug 20, 2018 10:20 am
Forum: hardware
Topic: Model B Video gone fuzzy/corrupt and blurry
Replies: 35
Views: 1753

Re: Model B Video gone fuzzy/corrupt and blurry

And to answer question in Logic Thread RST & /RST are flipping on power up and soft reset, but /RSTA is only ever low on power up. It doesnt drop to low. Neither of them are getting stuck in the wrong place when the system hangs. And the reset is correct on the 6502 as well. So I think the reset ci...
by Elminster
Mon Aug 20, 2018 9:01 am
Forum: hardware
Topic: Model B Video gone fuzzy/corrupt and blurry
Replies: 35
Views: 1753

Re: Model B Video gone fuzzy/corrupt and blurry

Ran Tricky's Test ROM and sounds, LEDS and relay click all work as they should. A few screen shots of the video, starts with junk (as usual) and then cycles through 8 colour screens. (Pictures displayed in reverse order)
by Elminster
Mon Aug 20, 2018 8:55 am
Forum: software: other
Topic: software troubleshooter for beeb hardware SelfTestOs
Replies: 37
Views: 3171

Re: software troubleshooter for beeb hardware SelfTestOs

Interestingly I just ran the Tricky ROM on my Beeb with issues, I shall have put a video over in the relevant thread, not sure I understand what it is telling me. Does all the relay clicking, led flashing and playing tunes as expected. Video result, not surprisingly, are not as they are meant to be.
by Elminster
Sun Aug 19, 2018 11:55 am
Forum: off-topic
Topic: Acorn Art Thread
Replies: 360
Views: 25811

Re: Acorn Art Thread

Good work both. A thought occurred to me, people could reverse the context, maybe in this thread or a new one, and use actual art materials to do pictures of Acorns (computers not baby trees), e.g. pencil, chalk, oils etc. Not me though my artistic abilities were superseded by offspring not long aft...
by Elminster
Sun Aug 19, 2018 11:45 am
Forum: hardware
Topic: I2C 4 U
Replies: 201
Views: 13327

Re: I2C 4 U

It it why I wallpapered my house in tin foil and sleep in a faraday cage.
by Elminster
Sun Aug 19, 2018 9:05 am
Forum: off-topic
Topic: Windows 10....
Replies: 167
Views: 13028

Re: Windows 10....

But that has always been the case. 20 years ago I got 5 or 6 EOL Windows 3.1 pc from work, because they could not handle windows NT. I loaded them up with redhat and Slackware after expending the memory to 8MB (or something like that) and used them as firewalls and slip gateway for years. I just hav...
by Elminster
Sun Aug 19, 2018 8:36 am
Forum: software & utilities for the pc, mac or unix
Topic: BBCSDL - Functional Differences from Other BBC BASIC implementations?
Replies: 48
Views: 544

Re: BBCSDL - Functional Differences from Other BBC BASIC implementations?

+1 to the +8 so far who think it is perfectly reasonable to post about the Multiplatform flavours of BBC BASIC.

And if you look at my posts, many go off topic.
by Elminster
Sun Aug 19, 2018 8:28 am
Forum: general
Topic: celebrate with music!
Replies: 10
Views: 601

Re: celebrate with music!

You should put some on the Acorn Art Thread from time to time view topic.php?p=211766#p211766
by Elminster
Sat Aug 18, 2018 9:44 pm
Forum: programming
Topic: BBC BASIC INTERPRETER differences between versions on Acorn/RISC OS machines (links)
Replies: 3
Views: 139

Re: BBC BASIC INTERPRETER differences between versions on Acorn/RISC OS machines (links)

You might want to read through this thread that discusses other features and points to other threads and such like.

viewtopic.php?f=2&t=15298
by Elminster
Sat Aug 18, 2018 7:33 pm
Forum: general
Topic: celebrate with music!
Replies: 10
Views: 601

Re: celebrate with music!

I can see why you want to fix the mouse now.
by Elminster
Sat Aug 18, 2018 12:50 pm
Forum: hardware
Topic: I2C 4 U
Replies: 201
Views: 13327

Re: I2C 4 U

MartinB wrote:
Sat Aug 18, 2018 12:11 pm
Sounds good Duncan! :D

...and back on I2C things,
I meant i2c, not spi, I have edited my post so now it just looks like you are crazy.