Search found 958 matches

by poink
Tue Oct 11, 2016 8:55 pm
Forum: general
Topic: Remarkable videos recently posted on Youtube
Replies: 230
Views: 25565

Re: Remarkable videos recently posted on Youtube

Surely that will break it. Though for an idea, can I simulate that in BASIC, somehow? You can probably do a similar effect by reprogramming the palette registers (NB., doesn't work in MODE 7). I believe we covered the VDU command (VDU19,logical%,physical%,0,0,0 - where logical% and physical% are BA...
by poink
Tue Oct 11, 2016 7:29 pm
Forum: wanted
Topic: Wanted - DSDD Disks
Replies: 4
Views: 734

Re: Wanted - DSDD Disks

boba wrote:Found some on EBay.
Give them a good inspection for mould before putting them in your drive.
by poink
Tue Oct 11, 2016 1:16 am
Forum: archive requests
Topic: The Magic Telephone (aka "The Magic Telephone Box")
Replies: 21
Views: 4881

Re: The Magic Telephone (aka "The Magic Telephone Box")

The fact that the games are so elusive, definitely make the appeal even greater. I have been googling for years. I hope the other games can be found somewhere one day. I think the reason that The Magic Telephone is elusive is because it was distributed by a charity (MAPE) to primary schools. So whi...
by poink
Thu Oct 06, 2016 10:00 am
Forum: hardware
Topic: Some Newbie A3000 Questions
Replies: 5
Views: 516

Re: Some Newbie A3000 Questions

What poink says about configuring the CMOS will be lost between reboots if there's no battery. I'd recommend buying a replacement. A battery would be desirable (and the A3000 has the nice option of using the battery compartment in the case). You'll probably need one to get the SCSI card working. (Y...
by poink
Thu Oct 06, 2016 9:17 am
Forum: hardware
Topic: Some Newbie A3000 Questions
Replies: 5
Views: 516

Re: Some Newbie A3000 Questions

I do not have an external drive, and I also have no battery in the machine (usually press R on boot-up), so I have no idea why this icon continues to appear! Any ideas? It doesn't detect the drive, but relies on the configuration in the CMOS RAM. Hold delete on power on to reset the OS configuratio...
by poink
Fri Sep 30, 2016 3:37 pm
Forum: hardware
Topic: Ashtray fixes
Replies: 7
Views: 859

Re: Ashtray fixes

Having said that if I do manage to fix my ash tray I will be forced to drill a hole in my keyboard mount or else where will my datacentre USB led go? A scheme where it was wired to light cassette motor LED might be attractive, given the little potential for confusion as to whether you're using the ...
by poink
Thu Sep 29, 2016 10:01 am
Forum: general
Topic: Death-dapters - Why you really don't want them...
Replies: 42
Views: 3423

Re: Death-dapters - Why you really don't want them...

Sneaky Chinese manufacturers... only a matter of time until these imports get banned. They were banned years ago ( for example ). Supply of travel plug adaptors as part of an appliance is illegal in the UK even if the supplied adapter is itself legal. Plug converters are legal. (The distinguishing ...
by poink
Wed Sep 28, 2016 3:55 pm
Forum: for sale / freebies
Topic: Offered: BeebOPL an 'Ad Lib / Soundblaster' sound card for the Beeb
Replies: 52
Views: 10128

Re: Offered: BeebOPL an 'Ad Lib / Soundblaster' sound card for the Beeb

Interested in a complete kit (although, the board and Yamaha chips would be fine if the kit's not an option)
by poink
Wed Sep 28, 2016 1:34 pm
Forum: general
Topic: What does your Acorn do that's unique?
Replies: 62
Views: 5389

Re: What does your Acorn do that's unique?

Call Spuddy on 01268 515441, 24 hours a day. This number has four Hayes Optima V34 modems dedicated for spuddy! Now that takes me back to the 90s :-D Free shell on a Sparc 2 too, very cool. Overtaken by more recent services, of course,, but definitely something I'd have loved when it was running. =...
by poink
Tue Sep 27, 2016 1:25 pm
Forum: hardware
Topic: T11 second processor board?
Replies: 52
Views: 4620

Re: T11 second processor board?

This really is a bit spurious though ;) You could start making the argument that the unexpanded electron is essentially an 8bit microprocessor in a 4bit design ;) You wouldn't claim that the Electron was a 'fully 8 bit machine'. :mrgreen: (The exact claim for the BK-0010 that's been disputed here i...
by poink
Tue Sep 27, 2016 9:17 am
Forum: hardware
Topic: T11 second processor board?
Replies: 52
Views: 4620

Re: T11 second processor board?

Where do you actually decide to draw the line? For a 'fully 16 bit computer'? Must haves are: largest operations are 16bit operations, 16 bit addressing, 16 bit data bus, 16 bit wide main memory and the main peripheral bus (if one exists), must be 16 bit. Allowable things are: 8 operations as well ...
by poink
Mon Sep 26, 2016 12:55 pm
Forum: hardware
Topic: T11 second processor board?
Replies: 52
Views: 4620

Re: T11 second processor board?

For example, NEC PC-9801 was introduced in 1982 and based on 8086 (1978), IBM PC AT was introduced in 1984 and based on 80286 (1982). I believe the key word here is 'fully'. (And, it should be 'home computer' rather than just 'computer'). The BK-0010 can be argued to be the first fully 16 bit home ...
by poink
Sun Sep 11, 2016 6:06 pm
Forum: hardware
Topic: Mouse conversion to Acorn spec
Replies: 6
Views: 925

Re: Mouse conversion to Acorn spec

I started converting an old serial mouse to work on a tatty and unloved Risc PC I scored on eBay. I'm curious as to whether anyone else has undertaken such mods before or am I walking point on this one? I'm not sure if anyone's done a serial mouse, but modifying mice for use on Acorns has definitel...
by poink
Sun Sep 11, 2016 3:01 pm
Forum: software & utilities for the pc, mac or unix
Topic: OMNIDISK INSTRUCTIONS
Replies: 7
Views: 1642

Re: OMNIDISK INSTRUCTIONS

Though if you are using Linux, you can override what the bios drive types are if you have a motherboard that has a floppy interface that physically supports 2 drives but only has one in the setup. Yes, I've done this; although, the results suggested that the motherboard I was trying it on only supp...
by poink
Sun Sep 11, 2016 1:28 pm
Forum: software & utilities for the pc, mac or unix
Topic: OMNIDISK INSTRUCTIONS
Replies: 7
Views: 1642

Re: OMNIDISK INSTRUCTIONS

Thanks for the quick reply, my question is can I use omniflop with windows 95 I don't think so - the OmniFlop website suggests that you need an NT-based Windows (so, Windows 2000, Windows XP, Windows Vista or Windows 7). The problem is that almost everyone will have skirted the problem of using Omn...
by poink
Wed Sep 07, 2016 3:00 pm
Forum: other vintage computer hardware, software and games
Topic: Cambridge Workstation vs. Archimedes
Replies: 17
Views: 1818

Re: Cambridge Workstation vs. Archimedes

I recently got a 32016 co-pro and saw mentioned online a few times, that people abandoned using panos and switched to xenix, but I've seen no evidence of this? I've seen probably the same mentions as you but I think it's speculation, based on early advertising material suggesting that Unix/Xenix wo...
by poink
Tue Sep 06, 2016 12:32 pm
Forum: wanted
Topic: "rough texture" (issue 4 and earlier(?)) BBC case top wanted
Replies: 14
Views: 2219

Re: "rough texture" (issue 4 and earlier(?)) BBC case top wanted

(as a side note it makes me flipping furious to receive a badly packed item... as if merely writing "FRAGILE" on a bit of tissue paper gives it an invisible coat of titanium :roll: !) I know the feeling; someone recently sent me a laserdisc protected by nothing more than a Tesco bag for life (after...
by poink
Tue Sep 06, 2016 12:18 pm
Forum: general
Topic: What does your Acorn do that's unique?
Replies: 62
Views: 5389

Re: What does your Acorn do that's unique?

Open large JPEG files - RISC OS since 3.6 can decompress them during display, so it only needs enough RAM to hold the JPEG file. (PCs often make a few copies during display, so, you need a serious investment in RAM to avoid swapping.)
by poink
Mon Sep 05, 2016 12:52 am
Forum: off-topic
Topic: eBay sniping tools
Replies: 15
Views: 1510

Re: eBay sniping tools

But what if there is a bug in the sniping tool and it places some insanely high bid? Can you use the 'there was a bug in my sniping tool' excuse to legitimately withdraw a bid after the auction has closed? A strict reading probably suggests that you're stuck, because, as I read it, sniping tools ar...
by poink
Thu Sep 01, 2016 2:10 pm
Forum: other vintage computer hardware, software and games
Topic: ATX to Xbox
Replies: 5
Views: 1010

Re: ATX to Xbox

As I'm cagey around exposed caps, and they probably aren't long for this world anyway... I wanted to use an ATX power supply... easy to replace in the future and more efficient. Hopefully you've seen it, it if you've not, apparently the clock capacitors are leaking and killing XBoxes , so that's pr...
by poink
Wed Aug 31, 2016 12:23 am
Forum: hardware
Topic: BBC 'B' Problem
Replies: 16
Views: 1579

Re: BBC 'B' Problem

tricky wrote:I saw à YouTube comparison of defender home ports and their beeb one had all its invaders clumped together, I thought it was probably just an old emulator, but maybe it uses something like the user via to get random numbers.
I'm guessing https://www.youtube.com/watch?v=Y1b98TKuRPk ?
by poink
Wed Aug 31, 2016 12:09 am
Forum: hardware
Topic: things to do with a co-pro...
Replies: 5
Views: 682

Re: things to do with a co-pro...

With a 32-bit co-pro, you could certainly offload the 3D scene transformations (in much better precision), and just send back the draw primitives. With the Pi, you could presumably just provide OpenGL, dither it on the co-pro and then try to copy pixels as fast as possible, given it's the VideoCore...
by poink
Tue Aug 30, 2016 7:30 pm
Forum: for sale / freebies
Topic: For sale: BBC Master and unknown (to me) BBC computer
Replies: 25
Views: 3496

Re: For sale: BBC Master and unknown (to me) BBC computer

roland wrote:The first one is a model that I don't know or haven't seen before
I think this is a Solidisk cased BBC B, so presumably it has a 1770 (hopefully the version 2 board).

Viglen produced something similar; however, the Viglen system has space between the drives.
by poink
Tue Aug 30, 2016 7:15 pm
Forum: hardware
Topic: T11 second processor board?
Replies: 52
Views: 4620

Re: T11 second processor board?

While DEC certainly had a presence in UK academia, I don't know whether its products were as popular in the UK, and I guess that whatever Cambridge University had in operation might have been influential in Acorn's reasoning. I think they might have been fairly popular - Acorn's marketing for the A...
by poink
Tue Aug 30, 2016 6:27 pm
Forum: hardware
Topic: T11 second processor board?
Replies: 52
Views: 4620

Re: T11 second processor board?

T11 on the contrary had portable software which can be used directly with T11 second processor with BBC Micro/Master. The 6809 had portable software due to the availability of the FLEX (aka Flex9) operating system. This allowed software to run on the CoCo, Dragon and 6809 second processor. There wa...
by poink
Mon Aug 29, 2016 9:02 pm
Forum: general
Topic: £44?! They've run MAD!
Replies: 3
Views: 555

Re: £44?! They've run MAD!

Why pay so much? I bet they don't even know the sponge trick, to self-centre them into some kind of usability. I don't think I've seen the bog standard sticks sell for anywhere near that. I'm guessing it's the fact that they're the official Acorn sticks, hence the value to a collector. (Incidentall...
by poink
Mon Aug 29, 2016 7:28 pm
Forum: hardware
Topic: 32K ROMs in Model B
Replies: 16
Views: 1431

Re: 32K ROMs in Model B

Would they have to assume that accesses to the special address or area is always a write? I was thinking that - there are certainly bits of the BBC and Archimedes machines that assume that accesses are always writes (an easy example is the printer latch). ROM-wise, it should be safe so long as both...
by poink
Mon Aug 29, 2016 5:42 pm
Forum: hardware
Topic: 32K ROMs in Model B
Replies: 16
Views: 1431

Re: 32K ROMs in Model B

How were 32K ROMs such as Inter-Word addressed in a standard Model B? I know it came on a carrier board but only inserted into a normal ROM socket so didn't have access to any other address lines, so how were both halves addressed? In a 16K socket, you could get the carrier board to implement ROM p...
by poink
Mon Aug 29, 2016 4:54 pm
Forum: general
Topic: Where's π?
Replies: 13
Views: 1827

Re: Where's π?

Well that's not really my area. PI is also used for Fourier Transforms - the Fast Fourier Transform is an efficient way of implementing large digital filters. A rule of thumb is that it's faster than a naive FIR past about 60 co-efficients. I'm pretty sure you make use of the FFT (and variants like...
by poink
Mon Aug 29, 2016 2:23 pm
Forum: hardware
Topic: T11 second processor board?
Replies: 52
Views: 4620

Re: T11 second processor board?

Elegant ternary logic?! No! It is much better to work with almost useless BCD. I think figures like Donald Knuth, who has called balanced trinary, "the prettiest number system of all" for its elegant arithmetic properties, would disagree with you there. It allows a significant increase in the densi...