Search found 549 matches

by geraldholdsworth
Mon Dec 09, 2019 6:30 pm
Forum: software: classic games
Topic: Repton 2 Electron Map
Replies: 8
Views: 413

Re: Repton 2 Electron Map

Well done.

For those that haven't found it, Snuggsy has written a modified version of the cheat (i.e. one that doesn't contain the game, but modifies the game assuming you already have it) for the Repton Resource Page.
by geraldholdsworth
Sun Dec 08, 2019 9:47 am
Forum: hardware
Topic: BBC B MMC
Replies: 6
Views: 193

Re: BBC B MMC

hoglet wrote:
Sun Dec 08, 2019 8:04 am
Card? means MMFS can't even communicate with the card.

The cause is usually:
- the wrong build of MMFS being used
- a hardware problem with the interface
- a hardware problem with the BBC VIA
by geraldholdsworth
Sun Dec 01, 2019 9:09 pm
Forum: software: other
Topic: Create SSD on PC
Replies: 5
Views: 240

Re: Create SSD on PC

If I pulled my finger out and finished it, Disc Image Reader would do the job. Once Chrimbo is over, I'm hoping to get back to it. Oh, and it's open source too.
http://www.geraldholdsworth.co.uk/code. ... =DiscImage
by geraldholdsworth
Sat Nov 30, 2019 11:24 am
Forum: software
Topic: Risc OS 3 Safe Mode
Replies: 3
Views: 176

Re: Risc OS 3 Safe Mode

The only thing I know of, aside from pressing R, T or DELETE power on to reset the CMOS, is pressing 1, 2, 3, or 4 on the keypad on power on to change the monitor type.
by geraldholdsworth
Fri Nov 22, 2019 11:16 am
Forum: software: classic games
Topic: Which version of Repton 2?
Replies: 17
Views: 2483

Re: Which version of Repton 2?

I guess that they have learnt from their mistakes...the new mobile versions of Repton 2 scenarios have been tested to completion - I tested three myself.
by geraldholdsworth
Thu Nov 14, 2019 9:45 pm
Forum: off-topic
Topic: PayPal fees on tax collected by eBay
Replies: 10
Views: 379

Re: PayPal fees on tax collected by eBay

They've added £3.81 at the top, then taken it off at the bottom. This is, effectively, the same as your earlier invoice except that it lists the Ebay fee. So, does the seller pay the extra £3.81, which is then removed by Ebay for themselves? And, as someone has stated, Ebay fees are 10%, including p...
by geraldholdsworth
Tue Nov 12, 2019 5:43 pm
Forum: software: other
Topic: 6502 assembler for Windows/Linux
Replies: 13
Views: 601

Re: 6502 assembler for Windows/Linux

BeebASM.

Edit the code in a text editor, then run it through BeebASM as a command line prompt...I do believe. Haven't actually used it myself.
by geraldholdsworth
Sat Nov 09, 2019 12:27 pm
Forum: off-topic
Topic: E-Bay Complaint
Replies: 17
Views: 639

Re: E-Bay Complaint

Ramtop wrote:
Sat Nov 09, 2019 12:13 pm
The situation is a farce, but I don't see it changing because EBay have been turning the screws on sellers for years now. Unless government legislates some form of rights for sellers on internet platforms EBay isn't going to back down.
But without sellers there would be no Ebay.
by geraldholdsworth
Sat Nov 09, 2019 12:25 pm
Forum: hardware
Topic: Cumana disc drive
Replies: 4
Views: 262

Re: Cumana disc drive

Sounds like the metal shielding for the drive head has come off.
by geraldholdsworth
Thu Nov 07, 2019 8:03 pm
Forum: wanted
Topic: Ribbon cable for 5.25" dual drive
Replies: 6
Views: 257

Re: Ribbon cable for 5.25" dual drive

Nice...one other thing is to be careful when you cut the ribbon cable as sometimes you get stray wires venturing across to neighbouring wires. I used to cut them with scissors (if I recall correctly), but a good sharp knife is probably a better bet. Oh, and before you crimp, check, check and check a...
by geraldholdsworth
Thu Nov 07, 2019 4:20 pm
Forum: wanted
Topic: Ribbon cable for 5.25" dual drive
Replies: 6
Views: 257

Re: Ribbon cable for 5.25" dual drive

If you can get hold of a reel of cable, and the connectors, it is fairly easy to make up - I used to use a vice to crimp the connectors, BITD.
by geraldholdsworth
Sat Nov 02, 2019 12:00 pm
Forum: general
Topic: On This Day
Replies: 5
Views: 405

On This Day

I've been wondering how many of us here can remember when we got our first computer - i.e. the exact date and the circumstances surrounding it. For me, it was 1984 and my Aunt Ethel had died. I had been looking to get a computer for a while but could not afford one. The choices came down to the Comm...
by geraldholdsworth
Sat Nov 02, 2019 11:51 am
Forum: software: classic games
Topic: Repton 2 colours
Replies: 11
Views: 1256

Re: Repton 2 colours

Sorry...took me a while - had to go to Edinburgh for work. Anyway, I've found I have two copies of the Superior Collection 2.
Superior Collection Vol 2 (2).jpg
by geraldholdsworth
Sun Oct 27, 2019 12:16 pm
Forum: software: classic games
Topic: Repton 2 colours
Replies: 11
Views: 1256

Re: Repton 2 colours

As to why not use a full sized table, I'm guessing it was either to save memory, and then it wasn't worth rewriting even if there was spare memory available, or it was easier to have code decide the palette while the levels were still in development because there wasn't a basis to judge palettes un...
by geraldholdsworth
Sun Oct 27, 2019 9:22 am
Forum: other vintage computer hardware, software and games
Topic: How to...on a Commodore 64
Replies: 17
Views: 537

Re: How to...on a Commodore 64

POKE 53281,x (where colour x=0 to 15) Thank you - only want to change the screen colour to make sure my monitor is setup right...then I noticed that Commodore Red, Green and Blue aren't the same as BBC Red, Green and Blue. But it's enough - at least white is white and black is black. Cheers, Gerald.
by geraldholdsworth
Sat Oct 26, 2019 8:37 pm
Forum: other vintage computer hardware, software and games
Topic: How to...on a Commodore 64
Replies: 17
Views: 537

How to...on a Commodore 64

On a BBC, I can do (in MODE 2):

Code: Select all

C.129:CLS
for a red screen

Code: Select all

C.130:CLS
for a green screen

Code: Select all

C.132:CLS
for a blue screen and

Code: Select all

C.135:C.0:CLS
for a white screen (with black text).
But, how do I do this on a Commodore 64?
by geraldholdsworth
Thu Oct 24, 2019 3:22 pm
Forum: hardware
Topic: Touchscreens
Replies: 3
Views: 354

Re: Touchscreens

Finally managed to get a couple of my computers into my TPI-PRO and on into the ELO touchscreen. Annoyingly, I've found that input 2 of the TPI doesn't work too great, with either VGA or Composite. 20191024_151244364_iOS.jpg For the BBC I wired up the GBS8200 as per this post and works without any a...
by geraldholdsworth
Tue Oct 22, 2019 8:22 pm
Forum: software: other
Topic: BBC Master Basic 4 commands
Replies: 3
Views: 249

Re: BBC Master Basic 4 commands

Looking through the Welcome Guide (also on the same page that Daniel has linked to), there are no new BASIC commands for BASIC 4. There are a few new assembler mnemonics, and also how BASIC works (and, as Daniel pointed out, extra VDU commands), but essentially, the BBC Micro or Acorn Electron User ...
by geraldholdsworth
Mon Oct 21, 2019 5:01 pm
Forum: hardware
Topic: New A3000 owner - dumb questions
Replies: 12
Views: 523

Re: New A3000 owner - dumb questions

matburton wrote:
Mon Oct 21, 2019 4:46 pm
That page also says "The A3000 is ideally suited to this modification as it has an unused battery holder built into the case" but my case doesn't seem to have a battery holder.
Next to where you plug the mouse in.
by geraldholdsworth
Mon Oct 21, 2019 4:59 pm
Forum: hardware
Topic: RISC PC Disappearing Memory
Replies: 5
Views: 285

Re: RISC PC Disappearing Memory

I also seem to remember that some modules have a parity check chip (?) on them, in addition to the RAM chips - again, one per side.
by geraldholdsworth
Mon Oct 21, 2019 12:42 pm
Forum: hardware
Topic: RISC PC Disappearing Memory
Replies: 5
Views: 285

Re: RISC PC Disappearing Memory

I seem to remember, back when I worked at Atomwide, that they turned a 32MB (I think) module into a 16MB module by desoldering all the chips on one side of the board (usually by hot air gun). So, could one of the chips on one side gone faulty?
by geraldholdsworth
Sun Oct 20, 2019 10:29 am
Forum: hardware
Topic: Master thinks a Joystick is plugged in and active
Replies: 17
Views: 405

Re: Master thinks a Joystick is plugged in and active

DavidK wrote:
Sun Oct 20, 2019 10:16 am
I'll have a look at the port later today to see if it's a dodgy connection, but if it's the chip, what are my chances of getting a replacement?
6522s are readily available on Ebay.
by geraldholdsworth
Sat Oct 19, 2019 8:31 pm
Forum: software: classic games
Topic: Repton 2 colours
Replies: 11
Views: 1256

Re: Repton 2 colours

I've found these notes, sent to me by (IIRC) Jasper Renow-Clarke: The offsets are for when the game is running. The colours which you get are a combination from 2 separate bits of pallete data and depend on which level you are on. Interestingly the table entry at 0EC5 for Level A isn't actually colo...
by geraldholdsworth
Wed Oct 16, 2019 12:41 pm
Forum: software: classic games
Topic: Repton 2 colours
Replies: 11
Views: 1256

Re: Repton 2 colours

Very interesting...not sure about where the trouser colour comes from. I'll need to try this out too.

Cheers,

Gerald.
by geraldholdsworth
Tue Oct 15, 2019 10:12 am
Forum: off-topic
Topic: Need help from a PC bod - Monitor and graphics card resolution
Replies: 1
Views: 183

Re: Need help from a PC bod - Monitor and graphics card resolution

If you set Windows to 'Duplicate' the screens, then the likelihood is yes. But, if you use it in 'Extend' mode (or the Intel software allows you to use 'Collage' which is like extend but instead of two desktops, you have the one spread across the two screens) then each screen will be set to the reso...
by geraldholdsworth
Mon Oct 14, 2019 9:28 pm
Forum: software: other
Topic: Calculating digits of Pi in Basic
Replies: 37
Views: 1050

Re: Calculating digits of Pi in Basic

Found it...in the first listing you use an array of integers, while in the second (and third) you are using, effectively, an array of bytes. It was easy to change in Delphi as I had a declaration: var a: array of Byte; which produced a wrong result, but changing it to var a: array of Integer; produc...
by geraldholdsworth
Mon Oct 14, 2019 8:37 pm
Forum: software: other
Topic: Calculating digits of Pi in Basic
Replies: 37
Views: 1050

Re: Calculating digits of Pi in Basic

BigEd wrote:
Mon Oct 14, 2019 4:56 pm
Sorry, my simple-minded changes to use peek and poke instead of arrays seems to be broken code - possibly because of operator precedence.
I ran out of time to try and find the error, and I never tried your second listing.
Well, there's always tomorrow.
by geraldholdsworth
Mon Oct 14, 2019 3:20 pm
Forum: software: other
Topic: Calculating digits of Pi in Basic
Replies: 37
Views: 1050

Re: Calculating digits of Pi in Basic

Ah, found that jgharston's last listing introduced an error, somewhere. If you run BigEd's first listing, it correctly calculates the digits.
by geraldholdsworth
Mon Oct 14, 2019 2:37 pm
Forum: software: other
Topic: Calculating digits of Pi in Basic
Replies: 37
Views: 1050

Re: Calculating digits of Pi in Basic

The subject line does say 'Calculating digits of Pi', not 'Calculating Pi', so omitting the decimal point and adding any number of leading zeroes is entirely consistent with that. Yep, fair point. I've found an inconsistency...with 100 digits I get: 3.14159265358979323846264338327950288419716848214...