Search found 8269 matches

by danielj
Mon Nov 30, 2020 9:28 am
Forum: 8-bit acorn software: other
Topic: Why was BBC BASIC so fast?
Replies: 196
Views: 7033

Re: Why was BBC BASIC so fast?

I'm vaguely interested to know if your machine and the Beeb's machines used the 8271 for their disk controller. Yes. I posted a long and detailed account of my experiences with the 8271 in the thread discussing its reverse engineering. But I realised it was hopelessly off-topic (as it is here) and ...
by danielj
Sun Nov 29, 2020 11:48 pm
Forum: 32-bit acorn emulators
Topic: Blank disk image creation
Replies: 3
Views: 74

Re: Blank disk image creation

These are just sector images, so you can get away with an empty file of the correct size then "format" it - either 800kb or 1.6mb. In so far as getting that file, format an existing disk image to blank it, or here are a variety of methods in Unix/MacOS to make a file of a specific size: https://oste...
by danielj
Sun Nov 29, 2020 6:09 pm
Forum: scanning of books, magazines, ads and letters
Topic: BCPL for the BBC Microcomputer [Remastered PDF]
Replies: 11
Views: 152

Re: BCPL for the BBC Microcomputer [Remastered PDF]

I've just given dv8 a link to the TIFFs for the calc package manual. They do need some bodgery to make them useful!

d.
by danielj
Sat Nov 28, 2020 10:40 am
Forum: 32-bit acorn hardware
Topic: RISC PC 120v Power supply
Replies: 8
Views: 158

Re: RISC PC 120v Power supply

Good shout. A meanwell PPT-125B should do the job:

https://www.meanwell.com/webapp/product ... od=PPT-125
by danielj
Sat Nov 28, 2020 8:00 am
Forum: 8-bit acorn hardware
Topic: Floppy disk type?
Replies: 2
Views: 94

Re: Floppy disk type?

Soft. Not high density.
by danielj
Fri Nov 27, 2020 11:28 pm
Forum: introduce yourself
Topic: Hello World
Replies: 10
Views: 140

Re: Hello World

Hullo Al :)
by danielj
Fri Nov 27, 2020 11:28 pm
Forum: introduce yourself
Topic: Hi from Italy
Replies: 7
Views: 122

Re: Hi from Italy

Hi Luca! :D
by danielj
Fri Nov 27, 2020 11:27 pm
Forum: introduce yourself
Topic: Hello all!
Replies: 7
Views: 106

Re: Hello all!

Hullo James :)
by danielj
Fri Nov 27, 2020 11:26 pm
Forum: introduce yourself
Topic: Hello from the USA
Replies: 10
Views: 99

Re: Hello from the USA

Hullo Peter :)
by danielj
Wed Nov 25, 2020 3:39 pm
Forum: 8-bit acorn hardware
Topic: Help - Implementing Shadow RAM in CPLD
Replies: 138
Views: 3506

Re: Help - Implementing Shadow RAM in CPLD

OK . . . Solution . . . Use a non rechargeable Lithium (3V or 3.6V) - You'll have at least 5 years out of it. Problem solved. Added bonus is no potentially leaky battery soldered to the board waiting to barf its guts up in the future :) A number of bits of hardware I'm in possession of would defini...
by danielj
Wed Nov 25, 2020 11:04 am
Forum: 8-bit acorn software: other
Topic: Why was BBC BASIC so fast?
Replies: 196
Views: 7033

Re: Why was BBC BASIC so fast?

Indeed, we all are (and don't I know it!) Anyway, we find ourselves where we find ourselves... :D SO! to be constructive - I'd suggest just removing the copyright string is the neatest solution?

d.
by danielj
Wed Nov 25, 2020 10:15 am
Forum: 8-bit acorn software: other
Topic: Why was BBC BASIC so fast?
Replies: 196
Views: 7033

Re: Why was BBC BASIC so fast?

:shock: :? That license is particularly permissive. You would be perfectly in keeping with the license by changing the name of the binary (and either removing or changing the display string), making sure attribution is clear in the source and there is a text file included in any distribution noting ...
by danielj
Fri Nov 20, 2020 9:33 pm
Forum: 32-bit acorn hardware
Topic: A3000 repairer?
Replies: 6
Views: 218

Re: A3000 repairer?

Thanks a lot. Will see what I can do. Was first going to have a go a cleaning better with gentle scraping then cotton bud and vinegar, then cotton bud and distilled water. Is that sensible? I do have a cheap (Ultrics) multimeter, and I have a new soldering iron coming tomorrow too which (with a bit...
by danielj
Fri Nov 20, 2020 4:38 pm
Forum: general
Topic: Stardot possibly hacked?
Replies: 19
Views: 730

Re: Stardot possibly hacked?

The forum was, I believe, hacked quite a long time ago - before my time! I don't know the details though, I think it was just brought down.

d.
by danielj
Thu Nov 19, 2020 7:35 pm
Forum: 8-bit acorn hardware
Topic: Formatting floppy’s
Replies: 9
Views: 254

Re: Formatting floppy’s

What DFS version have you got? 8271 DFS doesn't have a format command built in (versions 0.9 and 1.2). Type *HELP and report what you see?

d.
by danielj
Wed Nov 18, 2020 10:47 pm
Forum: 8-bit acorn hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 1284
Views: 107015

Re: RGB to HDMI using a Pi Zero and a small CPLD

BeebMaster wrote:
Wed Nov 18, 2020 10:16 pm
Anything else I can try to fix it?
Put in a better quality 16mhz crystal?

d.
by danielj
Wed Nov 18, 2020 10:08 pm
Forum: 8-bit acorn software: other
Topic: BBC Master - Calendar shows 1920 not 2020
Replies: 7
Views: 223

Re: BBC Master - Calendar shows 1920 not 2020

I'd definitely agree and recommend heading down the multios route - it's rather more useful than sticking an extra ROM in :) It's twice the price of the domesday ROM, but certainly does more than twice as much: https://www.ebay.co.uk/itm/ACORN-BBC-MASTER-128-MULTI-OS-4-OS-IN-ONE-1-20-2-00-3-20-AND-3...
by danielj
Wed Nov 18, 2020 7:42 pm
Forum: 8-bit acorn hardware
Topic: Loose ROM sockets
Replies: 12
Views: 276

Re: Loose ROM sockets

I have been recommended the Hakko FR301 desolder station a few times, but I am reluctant to drop $400+ on a desoldering thing! Hakko gear is excellent, but unless you're doing lots I don't think it's worth dropping loads on something like that. Lots of people on here use a duratool desoldering stat...
by danielj
Tue Nov 17, 2020 12:30 pm
Forum: 32-bit acorn hardware
Topic: Risc PC, PC Card and Ethernet - Solved!
Replies: 20
Views: 396

Re: Risc PC, PC Card and Ethernet

You'll have to put EtherH16 in the right place in the boot sequence to get it to load early enough for everything to see it's there, I think. That is, however, as much as I know as the boot sequence is a mysterious black box that I only touch wearing protective gloves if I absolutely have to. Someon...
by danielj
Tue Nov 17, 2020 11:50 am
Forum: 32-bit acorn hardware
Topic: Risc PC, PC Card and Ethernet - Solved!
Replies: 20
Views: 396

Re: Risc PC, PC Card and Ethernet

I think you need EtherH16 - EtherH8 is the 8-bit version if I recall.

It can, I think, be loaded with a *RMLoad <filename>

d.
by danielj
Sat Nov 14, 2020 9:24 am
Forum: off-topic
Topic: Soldering help - tip shaft sizes.
Replies: 8
Views: 274

Re: Soldering help - tip shaft sizes.

cmorley wrote:
Sat Nov 14, 2020 7:30 am
Ignore bevel tips too... anything you'd want a bevel for you can usually use the chisel.
Personally speaking I prefer bevels as they have a sharper edge and I'm better at drag soldering with them - but horses for courses :) Conical are indeed the work of the devil though!
by danielj
Fri Nov 13, 2020 10:29 pm
Forum: off-topic
Topic: Soldering help - tip shaft sizes.
Replies: 8
Views: 274

Re: Soldering help - tip shaft sizes.

Tips are generally fairly iron specific, so it's hard to say what'll fit one of those generics. If you're serious about keeping up with repairs on old computers it would be worth investing in something that's temperature controlled - the basic duratools from CPC would do the job, and the tips are re...
by danielj
Fri Nov 13, 2020 10:03 pm
Forum: 8-bit acorn hardware
Topic: SD35VCO IDE SD Card
Replies: 5
Views: 257

Re: SD35VCO IDE SD Card

Those WDCs are slightly different, but perhaps some of the edges were too fast? You'd probably need to scope/logic analyse the difference between the two on the 1MHz bus.
by danielj
Thu Nov 12, 2020 7:45 pm
Forum: 32-bit acorn hardware
Topic: Can I use a PC Monitor on my StrongArm Risc PC
Replies: 17
Views: 546

Re: Can I use a PC Monitor on my StrongArm Risc PC

Use water to rinse off the vinegar - IPA won't remove the residue (it's good for cleaning up a bit of grease or removing flux, but not very good at dissolving salts from batter leakage/neutralisation)... You can use IPA after to help speed up drying, mind! You should get a beep on boot. Any flashing...
by danielj
Thu Nov 12, 2020 7:20 pm
Forum: for sale / freebies
Topic: Suspicious A3020 eBay auction?
Replies: 9
Views: 416

Re: Suspicious A3020 eBay auction?

Unfortunately you still can't see the state of the battery, but at least it's not barfing out the back!
by danielj
Wed Nov 11, 2020 10:37 pm
Forum: general
Topic: Willem eprom programmer power supply
Replies: 13
Views: 312

Re: Willem eprom programmer power supply

I don't think you'll reliably get 21V out of a Willem.
by danielj
Wed Nov 11, 2020 10:12 pm
Forum: for sale / freebies
Topic: Suspicious A3020 eBay auction?
Replies: 9
Views: 416

Re: Suspicious A3020 eBay auction?

Good spot. Have requested actual picture... Let's see what happens :)
by danielj
Wed Nov 11, 2020 7:10 pm
Forum: 32-bit acorn hardware
Topic: Can I use a PC Monitor on my StrongArm Risc PC
Replies: 17
Views: 546

Re: Can I use a PC Monitor on my StrongArm Risc PC

A normal VGA monitor will work - hold down 4 when you turn it on if the battery is dead. Be sure to physically check the battery - if it wasn't removed, it's very likely to have leaked quite substantially and consequently damaged the motherboard :(

d.
by danielj
Tue Nov 10, 2020 9:12 pm
Forum: off-topic
Topic: LOLPRICE
Replies: 3019
Views: 358959

Re: LOLPRICE

roland wrote:
Tue Nov 10, 2020 2:11 pm
No thanks, the box is too bad :mrgreen: But for those who want a matching box: https://www.ebay.co.uk/itm/Acorn-Atom-b ... 3739586129
He's selling it on Amibay too at that price. I think this retro-stuff goes to people's heads sometimes...

d.
by danielj
Tue Nov 10, 2020 2:00 pm
Forum: off-topic
Topic: LOLPRICE
Replies: 3019
Views: 358959

Re: LOLPRICE

Acorn SCSI card just went for £132 :shock: https://www.ebay.co.uk/itm/324341976999 I know that they are one of the few SCSI podules that work with Risc iX but is that really what they are worth ? Am I being naive or tight ? Just means that someone with deep pockets wants to try running Risc iX, wil...

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