Search found 330 matches

by Boydie
Tue Oct 15, 2019 3:44 pm
Forum: acorn atom and system
Topic: Atom upgrade options
Replies: 13
Views: 313

Re: Atom upgrade options

I’m going to be a busy little bee... Now have bare boards for: Atom RGB to HDMI Noise killer Co-pro AtomSID YARRB (many thanks to Roland for finding a last one down the back of the sofa) Plus a massive delivery from Farnell today, and ones from Mouser et al on the way. Along with a few other machine...
by Boydie
Thu Oct 10, 2019 10:59 am
Forum: acorn atom and system
Topic: Atom Tube Interface
Replies: 213
Views: 18679

Re: Atom Tube Interface

Hi Boydie require a GAL16V8 I'll take one for my Atom tube interface please :) Any chance you could program it for me as well [-o< Marcus I'll set one aside. Don't know what the ETA is for them; I suspect they're coming from China. If I can program it (I believe my programmer can), I will. If I can...
by Boydie
Thu Oct 10, 2019 9:19 am
Forum: acorn atom and system
Topic: Atom Tube Interface
Replies: 213
Views: 18679

Re: Atom Tube Interface

These require a GAL16V8, which is now obsolete and hard to find at a reasonable price. I've managed to find a pack of 5 for not much, which are on their way now. When they arrive, and if they're good, then I'll have a few going spare...
by Boydie
Thu Oct 10, 2019 6:27 am
Forum: hardware
Topic: Plus 1 Rom Cartridges
Replies: 3
Views: 146

Re: Plus 1 Rom Cartridges

I picked up Electron Pascal, boxed, in Oxfam back in the late 90s. Unsurprisingly, both the cartridge and manuals looked like they’d been used once at most! :lol:
by Boydie
Wed Oct 09, 2019 9:15 pm
Forum: for sale / freebies
Topic: More books from the attic . . .
Replies: 11
Views: 326

Re: More books from the attic . . .

Interested in Wimp Programming for All and Game Makers Manual.
by Boydie
Wed Oct 09, 2019 11:36 am
Forum: for sale / freebies
Topic: Sold: Acorn BBC Micro model B with 1770
Replies: 7
Views: 661

Re: For Sale: Acorn BBC Micro model B with 1770

The original Acorn speech upgrade came with a black plastic plate that clipped over the hole left when you removed the cutout for the cartridge slot, so the slot was covered when not in use (which was all the time, given that Acorn never made any cartridges). May be a nice thing to reproduce so it l...
by Boydie
Tue Oct 08, 2019 6:41 am
Forum: hardware
Topic: Gotek how to request
Replies: 9
Views: 306

Re: Gotek how to request

Or, for thickies like me, there’s the big-print version...

https://www.exxoshost.co.uk/forum/viewtopic.php?t=593

Plenty of pictures. The only bit it won’t cover is how to make it Acorn-specific, but the wiki does that and at worst it’s a case of fiddling with the settings until it works.
by Boydie
Sat Oct 05, 2019 7:33 pm
Forum: acorn atom and system
Topic: A slightly dog-eared Atom
Replies: 30
Views: 921

Re: A slightly dog-eared Atom

I have a (not quite pristine but much better condition than yours) rear label for the cassette/video etc area, if you want to keep things as original as possible. I also have the one from the Bus Extension etc side, which may (or may not) be in better/worse condition than yours...
by Boydie
Sat Oct 05, 2019 7:32 am
Forum: acorn atom and system
Topic: Atom upgrade options
Replies: 13
Views: 313

Re: Atom upgrade options

Thanks for the clarification; I’ll keep that in mind. As an update, Hoglet’s still got HDMI and noise eliminator boards, so one of each will be coming my way soon. :D That’ll teach me to assume that because all the order lists in the relevant threads are full there aren’t any left! So all I need now...
by Boydie
Fri Oct 04, 2019 9:13 pm
Forum: acorn atom and system
Topic: Atom upgrade options
Replies: 13
Views: 313

Re: Atom upgrade options

Thanks for the offer, but my FP socket is already occupied. If you’re working on something new I’ll bide my time and keep watching...
by Boydie
Fri Oct 04, 2019 6:46 pm
Forum: acorn atom and system
Topic: Atom upgrade options
Replies: 13
Views: 313

Re: Atom upgrade options

I'm working my way slowly through the list :) The Atom SID is good fun, and my next add-on is a Co-Pro via the Atom TUBE I/F I have a spare board of each if you're interested. Having said that I went for a the Colour/HDMI I/F, Noisekiller and a Memory Expansion before the above. Best Andy I already...
by Boydie
Fri Oct 04, 2019 6:45 pm
Forum: acorn atom and system
Topic: Atom upgrade options
Replies: 13
Views: 313

Re: Atom upgrade options

Thanks guys. I was aware of the master hardware list, but ufortunately it doesn't give much of an indicator as to what's still available. From the various threads, I could tell I'd missed out on possibly the best options, ie YARRB and HDMI boards. The alternatives seem to be Prime's boards, but agai...
by Boydie
Fri Oct 04, 2019 4:46 pm
Forum: acorn atom and system
Topic: Atom upgrade options
Replies: 13
Views: 313

Atom upgrade options

Now I’ve got my atoms up and running, and have an AtoMMC (and have a birthday coming up :D ), I want to get them up to spec.
As far as I can tell, the essentials are:

RAM upgrade to 32k
Colour
Noise eliminator

What options are still being made/ sold for these?
by Boydie
Thu Oct 03, 2019 5:43 pm
Forum: hardware
Topic: Problems booting beeb issue 4
Replies: 73
Views: 1450

Re: Problems booting beeb issue 4

Dodgy OS rom socket? If it’s anything like the quality of the speech ones...
I’ve had this a few times. With a rom in the socket, try continuity testing between the shoulders of the rom and the soldered pin on the other side on the board.
by Boydie
Thu Oct 03, 2019 3:14 pm
Forum: hardware
Topic: MMFS Development and Support
Replies: 919
Views: 64359

Re: MMFS Development and Support

A possible solution? On the Solidisk, we know where the sideways ram banks are - banks 8 through F (although according to the manual banks 8 & 9 are typically used for shadow, if active). Hence bank F should always be present and available. Rather than have ZMMFS looking for spare ram, and finding t...
by Boydie
Thu Oct 03, 2019 2:22 pm
Forum: hardware
Topic: MMFS Development and Support
Replies: 919
Views: 64359

Re: MMFS Development and Support

I’ve done a bit more exploring with the patched ZMMFS in eprom. It doesn’t seem to be locking up, so much as printing squares for ever more. It does respond to (CTRL) Break, and if I’m quick with CTRL-SHIFT, I can see glimpses of the usual startup banners as they flash by on the screen, as in Lines ...
by Boydie
Thu Oct 03, 2019 10:57 am
Forum: hardware
Topic: MMFS Development and Support
Replies: 919
Views: 64359

Re: MMFS Development and Support

Dave, Just looking at the code, do you think the subroutine PageIn12K for the Bplus would be the key to this, i.e. for a Solidisk version, everywhere the B+ version would need to page in the 12K, the Solidisk version would need to enable writing to it's own RAM bank? Apologies if this is what you’r...
by Boydie
Wed Oct 02, 2019 8:34 pm
Forum: hardware
Topic: MMFS Development and Support
Replies: 919
Views: 64359

Re: MMFS Development and Support

So, if I understand you correctly, you’re saying that ZMMFS isn’t giving the “No sideways ram banks available” error because it can’t find any at all, but because it does find one but it’s too small and the error message is actually because the first bank it finds is too small and its copy fails? Co...
by Boydie
Wed Oct 02, 2019 7:19 pm
Forum: hardware
Topic: MMFS Development and Support
Replies: 919
Views: 64359

Re: MMFS Development and Support

It's the 4MHz board, so they did indeed supply a 4MHz 65C02. I've now done some more playing. The patched ZMMFS that Coeus supplied won't work if it's burnt into eprom, but will work if it's loaded into sideways ram, and then hard-reset. Soft reset always makes it complain about a ROM/RAM mismatch a...
by Boydie
Wed Oct 02, 2019 6:41 pm
Forum: hardware
Topic: MMFS Development and Support
Replies: 919
Views: 64359

Re: MMFS Development and Support

Okay, I have a "solution", for want of a better word... Having SWMMFS in the backup ROM store and copying it into SRAM from there via *Select just doesn't work, no matter what. Always gives a "Bad Sum" error. The only way to get it to work properly is: Boot with SmartSPI (or other FS) *RLOAD SWMMFS ...
by Boydie
Wed Oct 02, 2019 4:58 pm
Forum: hardware
Topic: MMFS Development and Support
Replies: 919
Views: 64359

Re: MMFS Development and Support

It's this one...
by Boydie
Tue Oct 01, 2019 5:40 pm
Forum: hardware
Topic: Problems booting beeb issue 4
Replies: 73
Views: 1450

Re: Problems booting beeb issue 4

All those screenshots look *very* familiar to me. Could this be a variant of my problem, giving a clock skewed in a slightly different way? Mine started as innocuous and became progressively more blatant as the chip failed. What happens if you leave the machine on for a few minutes, and don’t reset?...
by Boydie
Tue Oct 01, 2019 2:54 pm
Forum: hardware
Topic: MMFS Development and Support
Replies: 919
Views: 64359

Re: MMFS Development and Support

IIRC it’s version 3.01, (c) KTAcres in 1986. I’ll upload an image whenever I get home from work (may be tomorrow morning :( ).
It took a considerable amount of searching to find which of the many versions actually worked with my board.
by Boydie
Tue Oct 01, 2019 11:10 am
Forum: off-topic
Topic: Capturing interlaced / 50Hz video
Replies: 37
Views: 923

Re: Capturing interlaced / 50Hz video

DVD recorders tend to record interlaced.

MediaInfo will tell you everything you need to know about any media file (plus an awful lot you don’t).
by Boydie
Mon Sep 30, 2019 8:47 pm
Forum: hardware
Topic: MMFS Development and Support
Replies: 919
Views: 64359

Re: MMFS Development and Support

That’s a much better (later?) version of the manual than mine. Mine doesn’t have page 32 onwards. Two thoughts strike me (although I’m not adept enough to implement either). 1) On a Solidisk 256, ZMMFS doesn’t have to look for a free SRAM slot. On startup, banks 8-15 are all empty (although non-exis...
by Boydie
Mon Sep 30, 2019 7:10 pm
Forum: hardware
Topic: MMFS Development and Support
Replies: 919
Views: 64359

Re: MMFS Development and Support

It *really* doesn’t like that! :( 48FA3CFC-3E32-4637-846A-C4047D8914BC.jpeg This page of the manual may shed a bit more light as to how the system “works”. 5AED350A-1722-45B7-8BAD-53D7A7EC2919.jpeg I get the feeling that the sideways ram banks don’t actually exist until the Manager loads an image in...
by Boydie
Mon Sep 30, 2019 6:51 pm
Forum: hardware
Topic: MMFS Development and Support
Replies: 919
Views: 64359

Re: MMFS Development and Support

Thanks. I’ll give that a try, and let you know how it goes.
by Boydie
Mon Sep 30, 2019 12:28 pm
Forum: acorn atom and system
Topic: Old poorly Atom
Replies: 7
Views: 281

Re: Old poorly Atom

It lives! It seems to have been a combination of: 1) Bad 6847 (no display) 2) Dodgy 8255 socket 3) Very dodgy keyboard contacts - over half the keys not working. When this includes the Break key, it takes a while before even a working machine can be persuaded to reset. All keys have now been cleaned...
by Boydie
Mon Sep 30, 2019 8:57 am
Forum: acorn atom and system
Topic: My new poorly Atom
Replies: 86
Views: 1405

Re: My new poorly Atom

I had the same problem last night with my Issue 4 - at least 50% of the keys weren’t working. After liberal IPA squirts, followed by protracted wiggling and hammering of each key, they all work. Typically, it took up to 3 squirts and 30 seconds of jiggling per key, but it worked on all of them.
by Boydie
Sun Sep 29, 2019 6:38 pm
Forum: acorn atom and system
Topic: Old poorly Atom
Replies: 7
Views: 281

Re: Old poorly Atom

Not been able to test yet. However, there has been (hopefully) significant progress. I've found that if the board is lifted slightly in one corner then I'm sometimes rewarded with a prompt. Tapping around the 8255 also sometimes causes the garbage on the screen to change (admittedly to something tha...