Search found 611 matches

by KenLowe
Sun Mar 31, 2019 10:36 am
Forum: hardware
Topic: BBC Master 128 schematic in KiCAD
Replies: 17
Views: 792

Re: BBC Master 128 schematic in KiCAD

Wow. That's very impressive. =D> =D>
by KenLowe
Sun Mar 31, 2019 1:02 am
Forum: for sale / freebies
Topic: Sold Out: New ROM / RAM Expansion Board for BBC B
Replies: 66
Views: 2701

Re: FS: New ROM / RAM Expansion Board for BBC B

Stewie66 wrote:
Sun Mar 31, 2019 1:00 am
Hi Ken

Would you ship to Sydney Australia and what’s the shipping cost

If so I’m interest in one plus a 32k eeprom

Cheers
Stewart
Would be happy to do that. I'll need to get back to you with shipping costs.
by KenLowe
Sun Mar 31, 2019 12:57 am
Forum: for sale / freebies
Topic: Sold Out: New ROM / RAM Expansion Board for BBC B
Replies: 66
Views: 2701

Re: FS: New ROM / RAM Expansion Board for BBC B

Interested purchasers... 1. Hopper: IntegraB. Shipped 9/4/19 2. marcusjambler: IntegraB with 32k EEPROM. Shipped 1/4/19 3. Stewie66: IntegraB with 32k EEPROM. Shipped 2/4/19 4. 1024MAK: IntegraB. Shipped 1/4/19 5. RobC: IntegraB. Shipped 1/4/19 6. rharper: IntegraB with 32k RAM. Shipped 2/4/19 7. ar...
by KenLowe
Sun Mar 31, 2019 12:56 am
Forum: for sale / freebies
Topic: Sold Out: New ROM / RAM Expansion Board for BBC B
Replies: 66
Views: 2701

Re: FS: New ROM / RAM Expansion Board for BBC B

I've added a couple of attachments: PDF copy of the IntegraB manual that will be supplied with the board Integra-B User Guide.pdf A zip archive with two disc images... IntBEEP.ssd Integra Windows disc image (INTWIN01.SSD). It was originally written by Computech back in the day, and it's a bit buggy,...
by KenLowe
Sun Mar 31, 2019 12:55 am
Forum: for sale / freebies
Topic: Sold Out: New ROM / RAM Expansion Board for BBC B
Replies: 66
Views: 2701

Sold Out: New ROM / RAM Expansion Board for BBC B

I have built a small batch of replica IntegraB sideways / shadow / RTC boards for the BBC model B. The board consists of the following: 8 x Expansion sockets for 8k / 16k ROMs. 4 of these sockets can be used for 32k ROMs / write protectable battery backed RAM / EEPROM / Flash / FRAM (banks 8 thru 15...
by KenLowe
Sun Mar 31, 2019 12:27 am
Forum: hardware
Topic: New ROM / RAM Expansion Board for BBC B
Replies: 93
Views: 3872

Re: New ROM / RAM Expansion Board for BBC B

So, following on from my last post, I have an initial batch of 10 fully populated boards that will be available for posting early next week for anyone who wants to purchase one. In the first instance, this initial batch is being offered exclusively to Stardot forum members, but in time I do intend t...
by KenLowe
Mon Mar 25, 2019 2:57 pm
Forum: hardware
Topic: BBC B+ 64k EEPROMs and SW RAM
Replies: 17
Views: 747

Re: BBC B+ 64k EEPROMs and SW RAM

I'm not aware of any. There was an official add on board that would take the standard 64k BBC B+ upto 128k, but that would hardly be classed as 'plug in'. There were a bunch of wires that needed to be routed and soldered to various points on the main board. Other reasons why such a board probably do...
by KenLowe
Mon Mar 25, 2019 1:18 am
Forum: off-topic
Topic: Cleaning PCBs
Replies: 38
Views: 2858

Re: Cleaning PCBs

Quick update... Similar to the OP, I have been having some real problems trying to get my boards clean. Using 99% IPA on a newly soldered board, I was being left with a sticky mess, even after a fairly hard scrub and rinse. As the board dried, a white cloudy film also began to cover the board and so...
by KenLowe
Sun Mar 24, 2019 11:57 pm
Forum: general
Topic: Crimp tool for DIN plug cable clamp
Replies: 4
Views: 297

Re: Crimp tool for DIN plug cable clamp

Thanks for the feedback guys. I guessed as much, but was hoping that something might exist.
by KenLowe
Sun Mar 24, 2019 8:52 am
Forum: general
Topic: Crimp tool for DIN plug cable clamp
Replies: 4
Views: 297

Crimp tool for DIN plug cable clamp

Hi,

Is there a proper tool for tightening up the cable securing clamp on a DIN plug? Historically I've just used a pair of pliers, but that doesn't make a particularly good job of it. I've failed with google!

TIA.
by KenLowe
Wed Mar 20, 2019 12:32 pm
Forum: hardware
Topic: BBC Model B upgrades
Replies: 11
Views: 583

Re: BBC Model B upgrades

Kenlowe are there any pics of these boards or a web site wih them on as that sounds exactly what im looking for as it has the shadow ram option as well. There are a couple of photographs of the populated boards in this post. A copy of the original manual is available for download from here if you w...
by KenLowe
Wed Mar 20, 2019 6:07 am
Forum: hardware
Topic: Beeb Power Supply Issue
Replies: 28
Views: 1449

Re: Beeb Power Supply Issue

SpaceFlightOrange wrote:
Wed Mar 20, 2019 12:17 am
After much reflowing, etc. I think I may have cracked it!!
You really want to un-crack it :lol: :lol: :lol:.
by KenLowe
Wed Mar 20, 2019 6:02 am
Forum: hardware
Topic: BBC Model B upgrades
Replies: 11
Views: 583

Re: BBC Model B upgrades

Kenlowe when can we expect these boards to reach the market? I have a number of the boards built up and they're being soak tested in various machines now. No problems to report so far. I'm just finishing off the documentation and hope to have an initial small batch available by the end of the month.
by KenLowe
Tue Mar 19, 2019 6:28 pm
Forum: hardware
Topic: BBC Model B upgrades
Replies: 11
Views: 583

Re: BBC Model B upgrades

One other option, as you've already explored, is to install one of my IntegraB remake boards (once available). It is probably one of the most flexible SWR expansion boards out there, allowing installation of RAM, EEPROM, Flash, FRAM, and standard EPROM in many different combinations. All 12 ROM / RA...
by KenLowe
Tue Mar 19, 2019 3:50 pm
Forum: hardware
Topic: New ROM / RAM Expansion Board for BBC B
Replies: 93
Views: 3872

Re: New ROM / RAM Expansion Board for BBC B

Yeah. I have a number of them built up and they're being soak tested in various machines now. No problems to report so far. I'm just finishing off the documentation and hope to have an initial batch available by the end of the month.
by KenLowe
Fri Mar 15, 2019 8:27 pm
Forum: hardware
Topic: BBC B+ 64K upgrades and expansions
Replies: 17
Views: 834

Re: BBC B+ 64K upgrades and expansions

If you are planning on SCART, maybe make the audio available to send to a TV. Definitely interested in this. My wife will appreciate it a lot. :lol: Any instructions for this? I did this by removing the 6 pin RGB DIN connector on the back of my Beeb and replacing it with an 8 pin equivalent. It req...
by KenLowe
Thu Mar 14, 2019 12:35 am
Forum: hardware
Topic: Beeb Power Supply Issue
Replies: 28
Views: 1449

Re: Beeb Power Supply Issue

Sounds more like a dry joint somewhere on your PSU board. Try reflowing the solder on each joint, or as a minimum, any suspect looking joints.
by KenLowe
Tue Mar 05, 2019 9:10 pm
Forum: hardware
Topic: Palettemate / enhanced video ULA with 4096 colours
Replies: 595
Views: 58425

Re: Palettemate / enhanced video ULA with 4096 colours

RobC wrote:
Tue Mar 05, 2019 12:44 pm
I've now got a version of the firmware that fixes the problem. I'll obviously use this on any new boards but previous boards will need to have their CPLD updated.
That fixed it. Thank you again for your very prompt response.
by KenLowe
Tue Mar 05, 2019 1:14 pm
Forum: hardware
Topic: Palettemate / enhanced video ULA with 4096 colours
Replies: 595
Views: 58425

Re: Palettemate / enhanced video ULA with 4096 colours

Or perhaps just wait until I actually need a proper fat cursor in the screen modes I never use anyway. :) :lol: :lol: :lol: Indeed. The only reason I picked it up is because the Level 9 graphic adventure games (which I'm using to test my new IntegraB boards) have split screen, and the bottom text s...
by KenLowe
Tue Mar 05, 2019 1:02 pm
Forum: hardware
Topic: Palettemate / enhanced video ULA with 4096 colours
Replies: 595
Views: 58425

Re: Palettemate / enhanced video ULA with 4096 colours

Many thanks for looking at this, and for such a quick turn-around. Much appreciated, for what was just a minor niggle. I should be able to do the update myself. I just need to dig out the programming hardware, and the instructions you gave me last time round. I'll drop you a PM with my email address...
by KenLowe
Mon Mar 04, 2019 11:35 pm
Forum: hardware
Topic: Palettemate / enhanced video ULA with 4096 colours
Replies: 595
Views: 58425

Re: Palettemate / enhanced video ULA with 4096 colours

Hi Rob. I noticed a while ago that the mode 3 & 6 cursor on my main beeb was thinner than I remembered. I never really gave this much thought until today when I fired up another beeb and was presented with the fatter cursor in modes 3 & 6. My main beeb has a VideoNula installed, whereas the other be...
by KenLowe
Mon Mar 04, 2019 10:46 pm
Forum: hardware
Topic: BeebSCSI 7_7
Replies: 161
Views: 5959

Re: BeebSCSI 7_7

dp11 wrote:
Mon Mar 04, 2019 10:22 pm
Pull request done. Please test and report back.
Wow. That's quite a lot of changes! I now need to figure out how to compile it. I've found some guidance at:

https://www.domesday86.com/?page_id=439

but I need to find the time to figure it all out.
by KenLowe
Mon Mar 04, 2019 10:37 pm
Forum: hardware
Topic: VideoNuLA survey
Replies: 10
Views: 549

Re: VideoNuLA survey

Similar to RobC, I've also ticked most of the boxes! My main machine has original speech hardware, 8271 FDD controller, econet hardware, VideoNula, GoSDC plugged into one of the ROM sockets, and an IntegraB plugged into the 6502. The IntegraB is an expansion board, which contains SWR, Shadow RAM, RT...
by KenLowe
Mon Mar 04, 2019 1:41 pm
Forum: hardware
Topic: BeebSCSI 7_7
Replies: 161
Views: 5959

Re: BeebSCSI 7_7

Unfortunately, I'm no expert on Github!

I notice that the latest commit on Feb 21 was to 'Fix File transfer as they would have extra bytes inserted', which seems to be different to the fix mentioned by dp11. The last update to filesystem.c is more than a year ago.

Or am I missing something???
by KenLowe
Mon Mar 04, 2019 12:50 pm
Forum: hardware
Topic: BeebSCSI 7_7
Replies: 161
Views: 5959

Re: BeebSCSI 7_7

I've done some work on this issue. Here are my notes , please ignore typos. <snip> This now makes access to the first and last sectors of the .dsc file take the same amount of time and so improves performance. I think it may actually improve performance for for first sector reads too. Well done =D>...
by KenLowe
Fri Mar 01, 2019 10:46 pm
Forum: hardware
Topic: Am I a Monster?
Replies: 22
Views: 898

Re: Am I a Monster?

The main reason for binning the modulator is to run a cable aft for a 2nd processor (watch the pcb screw!) then mounting the Pi down there, close to the vent. ...but why not just mount the PI (Zero/ ZeroW) underneath the Beeb, straight into the 2nd processor slot (ok, via a kjell level shifter firs...
by KenLowe
Fri Mar 01, 2019 10:38 pm
Forum: hardware
Topic: I2C 4 U
Replies: 394
Views: 26605

Re: I2C 4 U

Despite the now 26 downloads, I haven't had much feedback so both your coincident kind words are most gratifying and genuinely do make one's investment in such projects worthwhile.... 8) Err, at least two downloads were by me! I often download stuff, forget where I put it, then download it again! :...
by KenLowe
Fri Mar 01, 2019 10:12 pm
Forum: hardware
Topic: Shadow RAM
Replies: 4
Views: 418

Re: Shadow RAM

I have a shadow ram board in my beeb model b specifically to get graphics in the Level 9 game Lancelot. This was one of the main motivations for my Integra-B project , which has both shadow and sideways RAM, both of which are required for the Level 9 graphics. other than a few Aries efforts and tha...
by KenLowe
Tue Feb 26, 2019 12:08 pm
Forum: hardware
Topic: New ROM / RAM Expansion Board for BBC B
Replies: 93
Views: 3872

Re: New ROM / RAM Expansion Board for BBC B

Thank you. It's actually quite therapeutic (perhaps it's the solder fumes :roll:). A bit like Lego for adults!
by KenLowe
Mon Feb 25, 2019 12:40 pm
Forum: off-topic
Topic: Cleaning PCBs
Replies: 38
Views: 2858

Re: Cleaning PCBs

So, what do you think about putting a PCB with a Varta rechargable battery through a dishwasher cycle???? Best to read the battery manufacturers documentation first. Some may be okay. Mark These batteries have a nasty habit of leaking outwards, so it will be interesting to know if anything can leak...