Search found 2585 matches

by Prime
Mon Nov 19, 2018 5:32 pm
Forum: acorn atom and system
Topic: Atomic Jet Set Willy 2
Replies: 13
Views: 1247

Re: Atomic Jet Set Willy 2

Is this the Atom I recently worked on..... in that case AtoMMC firmware will be in the ROM on the RAMROM.

Cheers.

Phill.
by Prime
Sat Nov 17, 2018 5:24 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG SOUTH 18 to 20 January 2019 (Hampshire) BOOKING THREAD
Replies: 37
Views: 702

Re: ABUG SOUTH 18 to 20 January 2019 (Hampshire) BOOKING THREAD

Put me down please,

Arriving Friday, Leaving Sunday, with normal kit :)

Cheers.

Phill.
by Prime
Wed Nov 14, 2018 12:33 am
Forum: acorn atom and system
Topic: System Cassette Interface
Replies: 6
Views: 203

Re: System Cassette Interface

Slow CD4000B series CMOS [-X Better off using 74HCxxxx series chips. Try using a 74HC4024 like this CD74HC4024E ;-) I always wondered about that are the 74HC4xxx direct drop in replacements for the 4000 series as long as VCC =< 5V ? It always seemed that way from the couple of datasheets I compared...
by Prime
Sun Nov 11, 2018 3:40 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG EAST MIDLANDS (Leicester) 9-11 November 2018 - BOOKING NOW on THIS THREAD
Replies: 117
Views: 3518

Re: ABUG EAST MIDLANDS (Leicester) 9-11 November 2018 - BOOKING NOW on THIS THREAD

Annnnd home again.

Good weekend as always, and good to see you all again, look forward to the next one.

Cheers.

Phill.
by Prime
Tue Nov 06, 2018 11:38 pm
Forum: other vintage computer hardware, software and games
Topic: Nascom / ICET weirdness.....
Replies: 2
Views: 87

Re: Nascom / ICET weirdness.....

Indeed I think it's the ICE-T being more forgiving, in this case some of the lines on the CPU data bus only seem to be getting to about 2.5V Time to investigate the 8304s I think, as the Atom also uses them I could try them in there, just to verify, though I'm tempted to think that it could be two t...
by Prime
Tue Nov 06, 2018 8:07 pm
Forum: other vintage computer hardware, software and games
Topic: Nascom / ICET weirdness.....
Replies: 2
Views: 87

Nascom / ICET weirdness.....

Hi all, Still working on trying to make my newly aquired Nascom 3 more reliable, I've changed the CPU socket for a turned pin one so I could try Hoglet's ICE-T Z80 in it. (including repairing a track I managed to lift getting the old socket out, most disappointed in myself for that). Anyway with the...
by Prime
Fri Nov 02, 2018 10:38 pm
Forum: emulators
Topic: ADL disk file format.
Replies: 4
Views: 211

ADL disk file format.

Hi all, In trying to get FlashFloppy working with my Nascom, Mark H pointed out that it uses identical disk geometry to the L format ADFS disks namely : 80 tracks of 16, 256 byte sectors, double sided. So I got a nascom image and renamed it .ADL, and put it in one of my Goteks, great doing a ]D brin...
by Prime
Thu Nov 01, 2018 10:09 pm
Forum: other vintage computer hardware, software and games
Topic: New addition : Nascom 3
Replies: 1
Views: 139

New addition : Nascom 3

Hi all, I may have mentioned that I didn't use Beebs at school, our school being in Coventry used Nascom 3 machines, as I think they where made locally, certainly when Lucas took over. Well I've been looking for one for a few years now and recently managed to bag one from ebay, oddly enough seller w...
by Prime
Mon Oct 29, 2018 1:44 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG EAST MIDLANDS (Leicester) 9-11 November 2018 - BOOKING NOW on THIS THREAD
Replies: 117
Views: 3518

Re: ABUG EAST MIDLANDS (Leicester) 9-11 November 2018 - BOOKING NOW on THIS THREAD

tricky wrote:
Mon Oct 29, 2018 10:13 am
Finally got around to booking the hotel, see you Friday evening.
Excellent, bring your Atom, and we can see if we can get it going (if you haven't by then).

Cheers.

Phill.
by Prime
Sun Oct 28, 2018 10:42 am
Forum: acorn atom and system
Topic: Atom basic error
Replies: 6
Views: 249

Re: Atom basic error

I'm sure I asked this before...... I serached and could not find it tho..... https://stardot.org.uk/forums/viewtopic.php?f=44&t=7316 I thought I'd asked it before I did try searching, obviously didn't use the correct terms / go far enough back....Ironically I'm testing the same part of the colour b...
by Prime
Sat Oct 27, 2018 8:02 pm
Forum: acorn atom and system
Topic: Atom basic error
Replies: 6
Views: 249

Re: Atom basic error

roland wrote:
Sat Oct 27, 2018 5:57 pm
Prime wrote:
Sat Oct 27, 2018 10:24 am
Humm that does seem to be it, how primitive that it doesn't ignore whitespace.
What would you expect in a 4 KB rom :lol:
There is indeed that :)

Cheers.

Phill.
by Prime
Sat Oct 27, 2018 10:24 am
Forum: acorn atom and system
Topic: Atom basic error
Replies: 6
Views: 249

Re: Atom basic error

IanS wrote:
Fri Oct 26, 2018 9:23 pm
Remove the space after the ; ?

Code: Select all

20 [ JMP #9000;]
Humm that does seem to be it, how primitive that it doesn't ignore whitespace.

Cheers.

Phill.
by Prime
Fri Oct 26, 2018 9:01 pm
Forum: acorn atom and system
Topic: Atom basic error
Replies: 6
Views: 249

Atom basic error

Hi all, I'm sure I asked this before...... I serached and could not find it tho..... Why does this program : 10 P=#9000 20 [ JMP #9000; ] 30 LINK #9000 40 END Give an error 208** in line 30? If I type the same commands in direct mode they execute as expected..... ** Unknown assembler mnemonic acordi...
by Prime
Thu Oct 25, 2018 9:58 pm
Forum: off-topic
Topic: Linux partition format
Replies: 28
Views: 683

Re: Linux partition format

Thanks to Phill for showing me Clonezilla, it would have been a nightmare without that, and to everyone who helped. Glad to be of help, and glad it went ok. Clonezilla may have it's rough edges, as it won't shrink partitions, only expand them but it's certainly made my life easier both at work and ...
by Prime
Wed Oct 24, 2018 10:24 pm
Forum: hardware
Topic: Announcement : Update on hardware produced by me.
Replies: 15
Views: 1206

Re: Announcement : Update on hardware produced by me.

Humm, This puts me in a difficult position, I had formally passed over production of the DragonMMC boards to Bas / TheCorifot, a few months back but am still getting the odd request for them. For various reasons Bas has not been able to do another run, so I'm not sure what I should do at this point....
by Prime
Wed Oct 24, 2018 1:10 pm
Forum: acorn atom and system
Topic: Relocating the AtoMMC2 in the Atom...
Replies: 25
Views: 1872

Re: Relocating the AtoMMC2 in the Atom...

How can I tell :oops: It will have "issue x" on the board, where x=1,2,3,4,5. Normally under the video RAM on the same side as the chips. Also externally you can generally tell an issue 5 motherboard as it has beeb keyswitches**, and beeb like keycaps. **Unless like one of my machines it's an issue...
by Prime
Wed Oct 24, 2018 1:05 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG Cambridge Sept 7th-9th 2018 BOOKING THREAD
Replies: 207
Views: 8536

Re: ABUG Cambridge Sept 7th-9th 2018 BOOKING THREAD

An update on our attempts to archive the MIA tapes and discs in the museum's vaults: I emailed Jason Fitzpatrick, the curator, and he was very positive about Stardotters going down to the museum in person in order to archive his software. So I replied to his email and cc'd Phil, who volunteered upt...
by Prime
Tue Oct 23, 2018 10:03 pm
Forum: acorn atom and system
Topic: Relocating the AtoMMC2 in the Atom...
Replies: 25
Views: 1872

Re: Relocating the AtoMMC2 in the Atom...

Can't see anything wrong but you never know. Just measured the resistance across one of my Atoms and it's about 350R in one direction and about 375R in the other, so 300ish seems the right ballpark. When you say your PSU displays 0V, I take it it's a bench PSU? What does it display with nothing conn...
by Prime
Tue Oct 23, 2018 9:42 pm
Forum: off-topic
Topic: Linux partition format
Replies: 28
Views: 683

Re: Linux partition format

Crab apple maybe? I did watch a video on how to take it to bits, there is a fair amount of dismantlage required. The last time I took a laptop apart I broke the ribbon connecting the touchpad, and also the ribbon for the CD drive. I don't know how I did break the CD one, it just seemed to get trapp...
by Prime
Tue Oct 23, 2018 1:32 pm
Forum: software: games - high scores
Topic: High Score Challenge S10 - R7 - Chuckie Egg 2009
Replies: 45
Views: 1063

Re: High Score Challenge S10 - R7 - Chuckie Egg

Alas I'm not too good on the BBC one, now the Dragon version I might stand a chance :)

Cheers.

Phill.
by Prime
Tue Oct 23, 2018 7:55 am
Forum: acorn atom and system
Topic: Relocating the AtoMMC2 in the Atom...
Replies: 25
Views: 1872

Re: Relocating the AtoMMC2 in the Atom...

I haven't fitted the ramrom board yet, as I wanted to go one step at a time (for a change). The atom was fine with the atommc before. When I connect a PSU (4A 5v) it cuts out, but without a PSU connected, it measures 300 ohms across the power connector. Any suggestions, or a valid range of resistan...
by Prime
Mon Oct 22, 2018 4:53 pm
Forum: acorn atom and system
Topic: Relocating the AtoMMC2 in the Atom...
Replies: 25
Views: 1872

Re: Relocating the AtoMMC2 in the Atom...

I didn't have as much luck! (or skill?) I soldered mine near then end of the PL8 pins, but the lid didn't fit, sol I desoldered it and moved it further down them. I had to relocate my power connector to make room for my RAMROM board, which I did by removing the regulators and their heat-sink. And n...
by Prime
Fri Oct 19, 2018 8:28 pm
Forum: acorn atom and system
Topic: System floppy controller clone....
Replies: 2
Views: 167

System floppy controller clone....

Hi all, I've just managed to get the CPLD on my System floppy clone baord to work correctly with unmodified 3.5" drives so that it doesn't timeout, and requires no modification of the code. (basically added an extra flipflop to the timeout chain, which is easy to do in a CPLD). I may at some point t...
by Prime
Fri Oct 19, 2018 8:18 pm
Forum: hardware
Topic: Keyboard schematics
Replies: 6
Views: 322

Re: Keyboard schematics

Thanks both for the replies, found it, the controller IC is way obsolete so need to find a new (Arduino ?) solution. I made a little PS/2 -> System keyboard adapter, just based on a single Mega328 compatible chip, will prolly get some boards made at some point. Not Arduino, but just standard AVR-GC...
by Prime
Fri Oct 19, 2018 1:49 pm
Forum: acorn atom and system
Topic: Atom extras
Replies: 7
Views: 265

Re: Atom extras

Hi David, All, I'm the person that designed the RAM ROM board, and two of the versions of the colour board. The RAMROM board has been updated and I may have a spare that I can supply. The colour board situation is this: I Origianally designed a colour board that was based on the LMH1251, which I cal...
by Prime
Wed Oct 17, 2018 12:08 am
Forum: other vintage computer hardware, software and games
Topic: Reading Atari ROMs
Replies: 4
Views: 234

Re: Reading Atari ROMs

I think faulty RAM ICs is one of the most common faults on any machine of this era :) :) IIRC the XEGS I repaired for Arcadian had another fault I think that was the one where the 6502C has also failed. so made up a board to convert a standard 6502....basically a copy of the circuit from the origina...
by Prime
Mon Oct 15, 2018 8:52 pm
Forum: introduce yourself
Topic: Hello from Northampton (starting an Acorn System 2/3 refurbishment)
Replies: 19
Views: 454

Re: Hello from Northampton (starting an Acorn System 2/3 refurbishment)

Thanks all for the encouraging comments and help so far, I'll post progress here as it happens. I'm guessing it would be better placed on one of the other forums and not 'introduce yourself', would '8 bit' / 'hardware' be the best place ? I think we had a discussion a while back and it was suggeste...