Search found 546 matches

by KenLowe
Tue May 14, 2019 11:49 am
Forum: hardware
Topic: Computer Concept PALPROM redesign.
Replies: 2
Views: 161

Computer Concept PALPROM redesign.

Following on from this thread, I recently had some PCBs fabricated to see if I could recreate any of the CC 128k PALROMs, like SpellMaster and Mega 3 ROM on a new carrier. Surprisingly (for me), it worked first time! One the goals I set myself was to create a carrier board that was no wider than a s...
by KenLowe
Sun May 12, 2019 7:26 pm
Forum: for sale / freebies
Topic: Sold Out: New ROM / RAM Expansion Board for BBC B
Replies: 61
Views: 1600

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

I'm glad you got it working. Did it work as you expected?
by KenLowe
Sun May 12, 2019 6:00 pm
Forum: for sale / freebies
Topic: Sold Out: New ROM / RAM Expansion Board for BBC B
Replies: 61
Views: 1600

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

Not sure why it's doing that. I've tried it on a couple of machines without any problem. I've made a couple of slightly different versions for you to try: RAMSET2 - Loads machine code into a DIM area RAMSET3 - As 2, but this one doesn't try to auto reboot. Can you test these and see what happens. Mi...
by KenLowe
Sun May 12, 2019 5:09 pm
Forum: for sale / freebies
Topic: Sold Out: New ROM / RAM Expansion Board for BBC B
Replies: 61
Views: 1600

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

Hmmm. After you confirm, the BBC should reset. Did that not happen?
by KenLowe
Sun May 12, 2019 4:51 pm
Forum: for sale / freebies
Topic: Sold Out: New ROM / RAM Expansion Board for BBC B
Replies: 61
Views: 1600

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

Ok. That should have fixed it. Try downloading it again.
by KenLowe
Sun May 12, 2019 4:10 pm
Forum: for sale / freebies
Topic: Sold Out: New ROM / RAM Expansion Board for BBC B
Replies: 61
Views: 1600

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

Oh. Sorry about that. I was having a couple of issues saving it on my GoTek, but thought I'd solved it. I'm currently out, but should be back shortly to fix it.
by KenLowe
Sun May 12, 2019 3:23 pm
Forum: for sale / freebies
Topic: Sold Out: New ROM / RAM Expansion Board for BBC B
Replies: 61
Views: 1600

Re: New ROM / RAM Expansion Board for BBC B

- the extra ram is not showed by *ROMS but it works, and BeebAid shows correctly the slots as RAM; Is it normal? 1. Is normal. Only the 4 preconfigured banks show as RAM. I am hoping to write a utility that will allow you to specify your additional RAM banks, so that *ROMS does report these banks, ...
by KenLowe
Sun May 12, 2019 9:55 am
Forum: for sale / freebies
Topic: Sold Out: New ROM / RAM Expansion Board for BBC B
Replies: 61
Views: 1600

Re: New ROM / RAM Expansion Board for BBC B

I'm still testing the board (and maybe i don't know how to use it ;) ), so: - the extra ram is not showed by *ROMS but it works, and BeebAid shows correctly the slots as RAM; - i had to reset (@+BREAK) the board once, since i got "Language?" after some time; - i can't get AMX SuperArt Working: Roms...
by KenLowe
Sat May 11, 2019 10:25 pm
Forum: for sale / freebies
Topic: Sold Out: New ROM / RAM Expansion Board for BBC B
Replies: 61
Views: 1600

Re: New ROM / RAM Expansion Board for BBC B

aotta wrote:
Sat May 11, 2019 9:41 pm
where did you find the extralong pins socket for the CPU?
APA-640-T-P from here
aotta wrote:
Sat May 11, 2019 9:41 pm
I am still playing with jumpers, trying to config my 62256 RAM
Are you having problems getting the extra 62256 RAM to work?
by KenLowe
Wed May 08, 2019 11:33 am
Forum: for sale / freebies
Topic: BeebMaster BBC B Econet Kit
Replies: 47
Views: 2963

Re: BeebMaster BBC B Econet Kit

...and yesterday, I received something very similar: 20190507_174330.jpg A couple of kits, a clock, a few cables and a couple of terminators. Not sure when I'll get time to install the kits and get a network up and running. Time permitting, maybe this weekend [-o< [-o< Thanks Ian =D> =D> =D>
by KenLowe
Tue May 07, 2019 4:09 pm
Forum: hardware
Topic: Raspberry Pi to 1MHz bus interface
Replies: 78
Views: 3347

Re: Raspberry Pi to 1MHz bus interface

dp11 wrote:
Wed Apr 10, 2019 7:55 pm
I'm just getting ready to do a release.
KenLowe wrote:
Thu Apr 11, 2019 5:16 pm
If you've still got any spares, a couple of full kits is definitely something I'd be interested in.

Thanks
Ken.
Have I missed out on this, or is it still a work in progress?

Thanks
Ken.
by KenLowe
Sun May 05, 2019 9:20 pm
Forum: emulators
Topic: MAME: How to ... ?
Replies: 10
Views: 528

Re: MAME: How to ... ?

Thanks for the reply. I did notice that your code is quite modular and wondered how these types of boards would fit that structure. I can't talk for all the RAM / ROM boards, but most flying leads are probably just picking up R/W and ROM select signals. However, as you've highlighed, the IntegraB is...
by KenLowe
Fri May 03, 2019 8:25 pm
Forum: hardware
Topic: Turbo MMC Interface
Replies: 35
Views: 5032

Re: Turbo MMC Interface

You need an associated .inf file to go with the ROM image. Drag a file from one of the SSDs onto your desktop to see how a typical .inf file is formatted.
by KenLowe
Fri May 03, 2019 1:04 pm
Forum: emulators
Topic: MAME: How to ... ?
Replies: 10
Views: 528

Re: MAME: How to ... ?

Hi Nigel,

Would you consider adding the IntegraB ROM / RAM / shadow RAM / RTC expansion board to MAME? It's something I added to BeebEm many years ago, if you wanted to look at the code.

TIA for considering.
Ken.
by KenLowe
Wed May 01, 2019 6:16 pm
Forum: hardware
Topic: Beeb 1MHz Bus FPGA Adaptor
Replies: 94
Views: 2708

Re: Beeb 1MHz Bus FPGA Adaptor

Please count me in. I can't resist these projects!
by KenLowe
Sat Apr 27, 2019 6:44 pm
Forum: for sale / freebies
Topic: Sold Out: New ROM / RAM Expansion Board for BBC B
Replies: 61
Views: 1600

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

@aotta @Rod C That's your boards dropped off with the courier. Please allow a couple of weeks for delivery. Edit 1: I have one further board built and ready to ship. After that, I'm waiting for a couple of components to complete the final two PCBs. Edit 2: One more sold. Remaining components receive...
by KenLowe
Sat Apr 27, 2019 8:10 am
Forum: for sale / freebies
Topic: Sold Out: New ROM / RAM Expansion Board for BBC B
Replies: 61
Views: 1600

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

Rod C wrote:
Sat Apr 27, 2019 7:47 am
Hi Ken
If I can be "right on the deadline" I would like to purchase one of your boards. Is postage about GBP15 to Australia still OK?

Can't message you yet. Perhaps an Admin can enable me?
Cheers
Rod
Yes. £15 P&P should still fine. I'll PM you with contact details.
by KenLowe
Sat Apr 27, 2019 5:57 am
Forum: for sale / freebies
Topic: Sold Out: New ROM / RAM Expansion Board for BBC B
Replies: 61
Views: 1600

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

Since i can't repair my WE RAMROM board, and seems you made a new batch... Interested in one Integra + 32k RAM! How much is shipping cost to Italy? That was just in time. I was just about to post them up on ebay at a higher price! I'll send PM with details. Just to be clear, the IntegraB board come...
by KenLowe
Wed Apr 24, 2019 11:30 pm
Forum: hardware
Topic: Raspberry Pi to 1MHz bus interface
Replies: 78
Views: 3347

Re: Raspberry Pi to 1MHz bus interface

dp11 wrote:
Wed Apr 24, 2019 9:37 pm
If anyone is good with recreating Harddisc FSMAP I would be interested to hear from you.
I don't know if this might help...

viewtopic.php?f=3&t=2022&p=13964#p13964

Edit: Link updated 2x!
by KenLowe
Tue Apr 23, 2019 10:56 pm
Forum: hardware
Topic: Another BBC B Needs Fixing.
Replies: 20
Views: 601

Re: Another BBC B Needs Fixing.

Sounds like you had a bad connection when the RAM was soldered directly into the board, and explains the very intermittent behaviour.

Glad you got it fixed. Well done. =D> =D> =D>
by KenLowe
Tue Apr 23, 2019 3:02 pm
Forum: for sale / freebies
Topic: Sold Out: New ROM / RAM Expansion Board for BBC B
Replies: 61
Views: 1600

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

I built up another couple of boards over the Easter weekend if anyone's still interested getting one. I'll give it a couple of days here, before posting them on ebay. Running short on PCBs now, and not sure if I should order up a second batch. :-k :-k
by KenLowe
Mon Apr 22, 2019 8:57 pm
Forum: hardware
Topic: Master ROM - what does it do?
Replies: 7
Views: 461

Re: Master ROM - what does it do?

The Master ROM that I have is a PALPROM device that sits in a carrier board, and was published by Beebbugsoft. I've not really used it, but having just plugged it in I can see that there are a lot of utility commands, which I guess attempts to emulate some of the additional functions that are standa...
by KenLowe
Sat Apr 20, 2019 10:53 pm
Forum: hardware
Topic: New ROM / RAM Expansion Board for BBC B
Replies: 81
Views: 2731

Re: New ROM / RAM Expansion Board for BBC B

Is there a copy of 2.26 with the SRAM tools removed? I attach one I made just now. To explain, the DFS 2.26 ROM is actually four logical sideways ROMs, each with its own service routine, packed into the same physical ROM. These are: Some RAM size/startup message code Sideays RAM utils DFS Tubehost ...
by KenLowe
Sat Apr 20, 2019 6:32 pm
Forum: hardware
Topic: BBC B+ 64k EEPROMs and SW RAM
Replies: 17
Views: 608

Re: BBC B+ 64k EEPROMs and SW RAM

I think you're right. The extra 32k of memory that took the BBC B+ to 64k (compared to a standard 32k beeb) was used for shadow RAM (20k) & private RAM (12k). It must have been the additional daughter board (which took the BBC B+ from 64k to 128k), that added the 4 x 16k SWRAM banks.
by KenLowe
Tue Apr 16, 2019 10:23 pm
Forum: hardware
Topic: Last Gasp for the 8271
Replies: 12
Views: 490

Re: Last Gasp for the 8271

Same here. Interested in a couple, subject to knowing the price...
by KenLowe
Mon Apr 15, 2019 11:30 am
Forum: hardware
Topic: New ROM / RAM Expansion Board for BBC B
Replies: 81
Views: 2731

Re: New ROM / RAM Expansion Board for BBC B

Folks, Just to make everyone aware, I picked up a potential 'issue' with the IntegraB board, if using the board with a Cypress (RAMTRON) FM18W08 FRAM module. I haven't supplied FRAM modules to anyone, and you can't actually buy a drop in module, so I don't think this will have affected anyone, and i...
by KenLowe
Mon Apr 15, 2019 8:47 am
Forum: hardware
Topic: New ROM / RAM Expansion Board for BBC B
Replies: 81
Views: 2731

Re: New ROM / RAM Expansion Board for BBC B

This is a great board :D I've had Level 9 :- Time and Magic & Lancelot working with graphics. Also PAL based Quest Paint and smally mouse work great. Super Art V3.61 runs but the mouse movement goes in reverse if you move it too quickly.... Marcus Glad to hear that it working well for you. :D Co-in...
by KenLowe
Sat Apr 13, 2019 2:21 pm
Forum: hardware
Topic: BBC B+ thinks it's a BBC A?
Replies: 19
Views: 593

Re: BBC B+ thinks it's a BBC A?

Yes. Your program occupies the space between PAGE & LOMEM. The more lines of code you write, the bigger LOMEM will become. The memory space between LOMEM and &8000 is what is available for screen modes. So, as you increase your code, the less space you will have available for screen memory, and ther...
by KenLowe
Fri Apr 12, 2019 8:05 am
Forum: hardware
Topic: A potential run of BeebSCSI 7.7 (the newest)
Replies: 87
Views: 2804

Re: A potential run of BeebSCSI 7.7 (the newest)

Four completely put together now. Two of those misbehaving. One, I think I know why, the other is going to take a bit longer as I've exhausted the obvious... d. A bit frustrating when that happens, but huge credit to you for taking on this task with so many very tricky SMD components to install. I ...