Search found 284 matches

by geraldholdsworth
Sun Sep 03, 2017 5:21 pm
Forum: general
Topic: Today I received.....
Replies: 4129
Views: 214623

Re: Today I received.....

VincentVega wrote:Having done some reading last night and inspecting the hardware further, I have an A1200 (revision 2B motherboard) with an A500 PSU. The part number on the unit is 312 503-02. This page classifies it as an A500 type 1.

Couldn't you use a PC PSU, as it doesn't require AC power (unlike the C64)?
by geraldholdsworth
Fri Aug 25, 2017 5:38 pm
Forum: off-topic
Topic: LOLPRICE
Replies: 2630
Views: 165952

Re: LOLPRICE

CMcDougall wrote:why £138 +18pp ?? No disc drive & does not work

To be fair, it did start at 99p.
by geraldholdsworth
Tue Aug 22, 2017 1:06 pm
Forum: software: classic games
Topic: Repton - Around the World in 40 Screens - 80 Track Version
Replies: 2
Views: 171

Re: Repton - Around the World in 40 Screens - 80 Track Version

The 80T and 40T are identical, as far as I am aware. Certainly no extra levels. The disc itself, IIRC, is copy protected and is likely just going to be data saved directly to the disc (i.e. no filename). Without digging out my ATWIFS floppy, and rigging my Master up again, I can't be certain.
by geraldholdsworth
Fri Aug 18, 2017 10:23 pm
Forum: other vintage computer hardware, software and games
Topic: Commodore 64 PSU replacement
Replies: 7
Views: 236

Re: Commodore 64 PSU replacement

The easiest way to replace a C64 or C128 PSU, is to build a 9V mains transformer and a modern +5V SMPSU together in a new case. Think that'll be the answer - what I'll probably do is get a PC PSU to get the +5V and +12V lines for the C64, and also my two drives alongside the 9v transformer. Power a...
by geraldholdsworth
Fri Aug 18, 2017 12:11 pm
Forum: other vintage computer hardware, software and games
Topic: Commodore 64 PSU replacement
Replies: 7
Views: 236

Re: Commodore 64 PSU replacement

It's actually 5V DC + 9V AC. Apparently, the 9V AC is used to provide +5V and +12V DC inside the computer (so why the 5V DC from the PSU?), plus also feeds the Time Of Day clock (which is not used by anything). I'm not keen on modifying the computer, so it'll have to be a replacement PSU. I was ther...
by geraldholdsworth
Fri Aug 18, 2017 11:55 am
Forum: other vintage computer hardware, software and games
Topic: Commodore 64 PSU replacement
Replies: 7
Views: 236

Commodore 64 PSU replacement

Was moving my 'cave' around the other night and thought about the PSU for my C64, as I was moving it. It would be nice to be able to use a modern replacement for the supply, considering that the two 1571 (or are they 1541 mark II?) drives can run off a normal PC power supply. The only issue with the...
by geraldholdsworth
Thu Aug 17, 2017 5:22 am
Forum: hardware
Topic: Fixing RiscPC
Replies: 26
Views: 277

Re: Risc PC battery requires changing?

This is a direct replacement: http://www.cjemicros.co.uk/micros/individual/newprodpages/prodinfo.php?prodcode=VAR-BATPCBVRPC while this one allows you to mount the battery away from the motherboard, plus is easily replaced later on: http://www.cjemicros.co.uk/micros/individual/newprodpages/prodinfo....
by geraldholdsworth
Wed Aug 16, 2017 7:11 pm
Forum: hardware
Topic: Fixing RiscPC
Replies: 26
Views: 277

Re: Risc PC battery requires changing?

danielj wrote:There is definitely corrosion on the board there - green around the cmos chip, bubbling of tracks.

Well spotted - looks like I need glasses!!
by geraldholdsworth
Wed Aug 16, 2017 6:17 pm
Forum: hardware
Topic: Fixing RiscPC
Replies: 26
Views: 277

Re: Risc PC battery requires changing?

In short, yes.
Although there doesn't appear to be any sign of corrosion, I would change it anyway.
by geraldholdsworth
Tue Aug 15, 2017 12:07 pm
Forum: software: classic games
Topic: Repton levels?
Replies: 198
Views: 19794

Re: Repton levels?

I'm the author of *some* of these levels but I have no idea how you got hold of them. DANGER, DOLLAR, RUDE, MOON, WAR and XMAS were made by me. I thought they were lost forever, it's amazing to see them again. Thankyou!! Some have been converted for PC Repton 3 and made available on my website. Che...
by geraldholdsworth
Wed Aug 09, 2017 10:48 am
Forum: off-topic
Topic: Would anyone find this useful?
Replies: 0
Views: 132

Would anyone find this useful?

I've been writing an atlas creator, which I've called, surprisingly, 'Atlas Creator' (OK, I'm not too good on coming up with good names for my applications). It is not related to Acorns in any way, except that I'm using it for my ongoing Repton Map Display (and Repton Map Decoder) projects. Basicall...
by geraldholdsworth
Sun Aug 06, 2017 9:53 am
Forum: other vintage computer hardware, software and games
Topic: British Computers: Power Connector Fuses - Values?
Replies: 14
Views: 296

Re: British Computers: Power Connector Fuses - Values?

Typical ratings found in modern units are 3A (door bells, smoke / fire alarms, alarm systems etc), 6A (lighting circuits), 10A (industrial lighting), 16A (water heaters, radial spurs), 20A (radial spurs), 32A (ring main circuits, cookers), 40A (showers, cookers), 45A (showers, cookers), 50A (high p...
by geraldholdsworth
Sat Aug 05, 2017 4:24 pm
Forum: other vintage computer hardware, software and games
Topic: British Computers: Power Connector Fuses - Values?
Replies: 14
Views: 296

Re: British Computers: Power Connector Fuses - Values?

You will find Kettles on sale with 0.75mm cable and fused at 13A Most new kit sold is likely to have a 13A fuse in it, as it is cheaper to order a load at the same rating in bulk than to buy different ratings and actually fit the proper fuse. A standard PAT person will fuse clover cables at 3A as t...
by geraldholdsworth
Sat Aug 05, 2017 1:41 pm
Forum: other vintage computer hardware, software and games
Topic: British Computers: Power Connector Fuses - Values?
Replies: 14
Views: 296

Re: British Computers: Power Connector Fuses - Values?

In my PAT testing course, I was told that anything below 700W should have a 3A fuse fitted, and anything above 700W should have a 13A fuse fitted. What you fit if it is 700W, I can't remember what was said. In addition, IEC leads (so-called 'kettle leads') should be fitted with 5A (and I then genera...
by geraldholdsworth
Sat Jul 29, 2017 12:02 pm
Forum: archive submissions
Topic: Repton 2 screen B fixed
Replies: 4
Views: 303

Re: Repton 2 screen B fixed

The fix makes it the same as the PC version. I haven't checked the Speccy version, yet (I'm on the wrong computer).
by geraldholdsworth
Thu Jul 13, 2017 5:03 pm
Forum: programming
Topic: !Paint for Windows
Replies: 3
Views: 229

Re: !Paint for Windows

Here is the first beta release of this application. It doesn't do much - click on the directory button to open a sprite file (and hopefully it won't try and open a non-sprite file), and click on the floppy disc icon to save all images as Windows bitmaps. You can also double click on an image to open...
by geraldholdsworth
Tue Jul 11, 2017 3:33 pm
Forum: software
Topic: Editing the palette in !Paint
Replies: 2
Views: 138

Re: Editing the palette in !Paint

I didn't think you were allowed to edit the palette in !Paint for 256-colour images. Cheers Paul - I've actually done a bit of digging, since I posted this, and found that it can be done. What you need to do is save the palette out, then drag it back in. It then allows editing of the palette. I kne...
by geraldholdsworth
Tue Jul 11, 2017 11:25 am
Forum: software
Topic: Editing the palette in !Paint
Replies: 2
Views: 138

Editing the palette in !Paint

Am I missing the obvious, but if I create a 256 colour sprite in !Paint, with a palette, how does one then edit this palette?
I can find the 'Edit Palette' menu option, but is greyed out. Is this because it is this 'Partial Palette'? If so, how do I create a 'Full Palette' 256 colour sprite?
by geraldholdsworth
Tue Jul 11, 2017 11:03 am
Forum: general
Topic: Today I received.....
Replies: 4129
Views: 214623

Re: Today I received.....

An SD2IEC for my C64. Now I finally have a "modern" storage solution for all of my permanent vintage computer collection. That looks quite a neat little box. I had considered getting one those that come in a box looking like a minature 1541 drive, and plugs into the serial port. I've also...
by geraldholdsworth
Tue Jul 11, 2017 10:57 am
Forum: stardot.org.uk
Topic: List of Acorn/BBC related websites
Replies: 23
Views: 908

Re: List of Acorn/BBC related websites

There's mine...although not exactly completely aimed at the Acorn/BBC, but Repton did spawn from them, so I guess it falls into that category: Site: Repton Resource Page http://www.reptonresourcepage.co.uk Owner: Gerald Holdsworth (geraldholdsworth) Description: Help and resources for Superior Inter...
by geraldholdsworth
Thu Jul 06, 2017 8:21 pm
Forum: programming
Topic: RISC OS Sprite format
Replies: 4
Views: 189

Re: RISC OS Sprite format

geraldholdsworth wrote:I think I have different PRMs to you as 1-558 and 1-559 refer to something else.

Found it on pages 1-538 and 1-539 (and the surrounding pages).
Think I'll need to create some test sprites and look at the files they produce, at byte level.
by geraldholdsworth
Thu Jul 06, 2017 2:44 pm
Forum: programming
Topic: RISC OS Sprite format
Replies: 4
Views: 189

Re: RISC OS Sprite format

I think I have different PRMs to you as 1-558 and 1-559 refer to something else. I think I've got the older ones somewhere, I'll need to dig out. I did find details of the VDU19 sequence though - and the palette files certainly do appear to be what I suspected (with 0x10 being the 'mode' of programm...
by geraldholdsworth
Thu Jul 06, 2017 1:08 pm
Forum: programming
Topic: RISC OS Sprite format
Replies: 4
Views: 189

RISC OS Sprite format

Following on from my other thread: http://stardot.org.uk/forums/viewtopic.php?f=54&t=13352 and trying to get my head around the RISC OS Sprite format. However the PRMs (on the ROOL website) gloss over the bit about the palettes. In particular, it mentions that 256 colour palettes may only have 6...
by geraldholdsworth
Wed Jul 05, 2017 8:03 pm
Forum: programming
Topic: !Paint for Windows
Replies: 3
Views: 229

Re: !Paint for Windows

I'm now actually wondering if '!Paint For Windows' represents the eventual application I'm writing - I'm not intending it to be a Windows version of !Paint, but to load RISC OS Sprite files into Windows.
by geraldholdsworth
Wed Jul 05, 2017 7:58 pm
Forum: hardware
Topic: BBC Master 128 Issue 1 composite colour mod
Replies: 1
Views: 134

Re: BBC Master 128 Issue 1 composite colour mod

I have, and it worked perfectly. Can't recall if I moved the link or not. However, I think my board is an issue 2, so probably didn't need the cap mod.
by geraldholdsworth
Wed Jul 05, 2017 3:13 pm
Forum: programming
Topic: !Paint for Windows
Replies: 3
Views: 229

!Paint for Windows

So I've finally taken the plunge and begun writing my Windows application to load RISC OS Sprite files...it's hard going getting my head around the format - Bitmaps are so much easier (at least I'm halfway there!!). This is following on from my taking the plunge to write an application which takes a...
by geraldholdsworth
Thu Jun 29, 2017 6:48 pm
Forum: hardware
Topic: floppy drive not working
Replies: 8
Views: 358

Re: floppy drive not working

I opened it and found the top of one of the heads floating around inside, so I removed that. I understand it works without this part. I got a drive sent to me also, with the same bit floating around inside. I thought that it might have fallen off in transit, so I stuck it back on - drive still does...
by geraldholdsworth
Sat Jun 24, 2017 4:12 pm
Forum: general
Topic: Today I received.....
Replies: 4129
Views: 214623

Re: Today I received.....

Well, I received them yesterday actually (and two have now been drunk)...and not really anything to do with computing - well, not directly anyway! DDBNxcvWsAAutLF.jpg Beers.jpg It's what happens when you get a £10 off voucher for a pub chain where the closest is over 200 miles away, and you complain...
by geraldholdsworth
Sat Jun 24, 2017 9:34 am
Forum: emulators
Topic: Printing to PDF or physical printer from emulators?
Replies: 17
Views: 518

Re: Printing to PDF or physical printer from emulators?

Elminster wrote:Think you need a retro PC for that!

Which I think I might have - just don't have a retro printer :-(
by geraldholdsworth
Sat Jun 24, 2017 9:33 am
Forum: emulators
Topic: Printing to PDF or physical printer from emulators?
Replies: 17
Views: 518

Re: Printing to PDF or physical printer from emulators?

#1 via Comms/Printer Destination/File I get an EMPTY text document and #2 via Comms/Printer Destination/Clipboard I get NOTHING on the Clipboard Did you then send anything to the printer? i.e. VDU2 : REM Turn printer on - can also use CTRL+B LIST : REM List the program VDU3 : REM Turn printer off -...

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