Search found 969 matches

by fordp
Sat Dec 22, 2018 11:12 pm
Forum: hardware
Topic: Raspberry Pi to 1MHz bus interface
Replies: 24
Views: 948

Re: Raspberry Pi to 1MHz bus interface

A bit quiet round here #-o
by fordp
Thu Dec 20, 2018 7:27 pm
Forum: hardware
Topic: Three Floppy Drives in Master 128
Replies: 14
Views: 449

Re: Three Floppy Drives in Master 128

So is it not possible to assert the motor on line without asserting either drive select lines ?
EDIT: I just checked the circuit diagram and my scheme does look possible.
by fordp
Thu Dec 20, 2018 6:48 pm
Forum: hardware
Topic: Three Floppy Drives in Master 128
Replies: 14
Views: 449

Re: Three Floppy Drives in Master 128

I thought the motor select was a separate line and then the Gotek could use that when neither drive select signals was active. The more I see floppy drives the some difference I see between all the various "standards"!
by fordp
Thu Dec 20, 2018 5:50 pm
Forum: hardware
Topic: Three Floppy Drives in Master 128
Replies: 14
Views: 449

Re: Three Floppy Drives in Master 128

I suspect the Gotek could be made to be the third drive with only software changes or at most a very simple patch! It is software based after all.
by fordp
Tue Nov 13, 2018 11:47 pm
Forum: software & utilities for the pc, mac or unix
Topic: Matrix Brandy BASIC V for Linux with SDL: V1.21.18 released
Replies: 461
Views: 17472

Re: Matrix Brandy BASIC V for Linux with SDL: V1.21.16 released

jgharston wrote:
Tue Nov 13, 2018 8:08 pm
I could not find any way to do it other than to duplicate the *entire* project.
Git is pretty clever and when you branch and also probably when you fork it will not actually copy the repository but just apply diffs. So only the changes are actually stored.
by fordp
Thu Oct 25, 2018 11:10 am
Forum: hardware
Topic: Pi-based Co-Pro on the cheap - 100MHz 6502 for £10? (now 274MHz)
Replies: 1109
Views: 102602

Re: Pi-based Co-Pro on the cheap - 100MHz 6502 for £10? (now 274MHz)

Well we have not pushed the boundaries of the Native ARM Copro for a while. I did some digging and found this: https://www.riscosopen.org:8443/forum/forums/2/topics/3457?page=1&posts_per_page=50 It is good to dream ;) It makes some reference to BBC Basic with VFP (Hardware Floating Point) Has anybo...
by fordp
Sun Oct 14, 2018 7:46 pm
Forum: hardware
Topic: Raspberry Pi to 1MHz bus interface
Replies: 24
Views: 948

Re: Raspberry Pi to 1MHz bus interface

I will take one please.
by fordp
Wed Oct 10, 2018 10:03 pm
Forum: introduce yourself
Topic: Hi from Finland
Replies: 12
Views: 316

Re: Hi from Finland

Welcome, where about in Finland do you live. I have been to Finland a few times and last visited in January. I have loads of 8 and 16 bit machine too ;)
by fordp
Tue Oct 09, 2018 5:29 pm
Forum: hardware
Topic: Pi Zero Super Interface
Replies: 26
Views: 1893

Re: Pi Zero Super Interface

dp11 wrote:
Tue Oct 09, 2018 1:43 pm
I've got a PCB ready to be made that puts a pi on the 1MHz bus.
Great news, where do I sign ;)
by fordp
Tue Oct 09, 2018 11:56 am
Forum: hardware
Topic: Pi Zero Super Interface
Replies: 26
Views: 1893

Re: Pi Zero Super Interface

Well things sometime go full circle. The Pi Copro was mentioned as one of the inspirations for the pi1541 project and maybe some of the code from that project would be useful when putting a pi on the 1Mhz bus, in particular the MicroSD card access. https://github.com/pi1541/Pi1541 One other thought ...
by fordp
Sun Sep 23, 2018 6:14 pm
Forum: hardware
Topic: Beeb FPGA
Replies: 495
Views: 37511

Re: Beeb FPGA

I'm new to this forum, and just want to ask about SDRAM support in BeebFpga. One additional feature, the 4MHz 6502 Co Processor, relies on being able to squeeze in additional accesses to the external RAM. I just don't think this is going to be possible with SDRAM. There are some notes about this in...
by fordp
Tue Jul 31, 2018 9:17 pm
Forum: software & utilities for the pc, mac or unix
Topic: Matrix Brandy BASIC V for Linux with SDL: V1.21.18 released
Replies: 461
Views: 17472

Re: Matrix Brandy BASIC V for Linux with SDL

Finally - I've uploaded my git tree to https://github.com/stardot/MatrixBrandy - have fun with it! Edit: rather than double posting... In the latest commits (available from github) I've got a handful of networking fixes, a teletext fix, and an update to the Telstar client demo program. There's also...
by fordp
Tue Jul 31, 2018 5:25 pm
Forum: software & utilities for the pc, mac or unix
Topic: Matrix Brandy BASIC V for Linux with SDL: V1.21.18 released
Replies: 461
Views: 17472

Re: Matrix Brandy BASIC V for Linux with SDL

Finally - I've uploaded my git tree to https://github.com/stardot/MatrixBrandy - have fun with it! Edit: rather than double posting... In the latest commits (available from github) I've got a handful of networking fixes, a teletext fix, and an update to the Telstar client demo program. There's also...
by fordp
Sat Jul 28, 2018 12:53 pm
Forum: software & utilities for the pc, mac or unix
Topic: Matrix Brandy BASIC V for Linux with SDL: V1.21.18 released
Replies: 461
Views: 17472

Re: Matrix Brandy BASIC V for Linux with SDL

I should have a go a t a bit of hacking. Most of the other projects are on the stardot github could the code at least be mirrored there?
by fordp
Thu May 17, 2018 4:55 pm
Forum: hardware
Topic: Pi-based Co-Pro on the cheap - 100MHz 6502 for £10? (now 274MHz)
Replies: 1109
Views: 102602

Re: Pi-based Co-Pro on the cheap - 100MHz 6502 for £10? (now 274MHz)

hoglet wrote: - Added a new PDP-11 Co Processor (in slot 11)
Dave
Great to see a new version and PDP-11 support too.

Is the PDP "core" from elsewhere or new?
by fordp
Wed May 16, 2018 11:19 am
Forum: hardware
Topic: Pi Zero Super Interface
Replies: 26
Views: 1893

Re: Pi Zero Super Interface

https://www.hackster.io/8bitkick/bbc-micro-online-38d004?utm_campaign=new_projects_default&utm_content=1&utm_medium=email&utm_source=hackster&utm_term=project_name More interesting reading if only the Pi Zero W wireless was useable from bare metal then something like the above link could be done ov...
by fordp
Tue Apr 17, 2018 2:35 pm
Forum: for sale / freebies
Topic: Offered: Matchbox sized 6502 / Z80 / 6809 Co Pro
Replies: 603
Views: 65337

Re: Offered: Matchbox sized 6502 / Z80 / 6809 Co Pro

I have a spare one if anybody really wants one. I will be rubbish at posting it out however as I work full time.
by fordp
Thu Apr 05, 2018 12:27 pm
Forum: hardware
Topic: Pi-based Co-Pro on the cheap - 100MHz 6502 for £10? (now 274MHz)
Replies: 1109
Views: 102602

Re: Pi-based Co-Pro on the cheap - 100MHz 6502 for £10? (now 274MHz)

I just saw this Bare Metal serial terminal project and thought it may be of use as a base for an acorn project (including alongside the Pi Copro):

https://github.com/fbergama/pigfx
by fordp
Wed Apr 04, 2018 1:29 pm
Forum: hardware
Topic: Scope recommendations
Replies: 17
Views: 1198

Re: Scope recommendations

I have a Hantek MSO5102D which has a good spec for the cash. It is by no means up to professional standard ones I use at work but I only use it every now and then!
by fordp
Fri Mar 30, 2018 8:05 pm
Forum: hardware
Topic: BBC Micro MMC Card adapter - compatible cards
Replies: 20
Views: 1028

Re: BBC Micro MMC Card adapter - compatible cards

That is the faster version of TurboMMC by Steve Picton if I am not mistaken!

I have a slower version of TurboMMC which is un-buffered so slower.

You can also use the more open MMFS ROM with it too.
by fordp
Mon Mar 12, 2018 1:03 pm
Forum: hardware
Topic: Pi Zero Super Interface
Replies: 26
Views: 1893

Re: Pi Zero Super Interface

dp11 wrote:I've seen it before. What I'd like to do is if I get time is a 1MHz bus version of pitubedirect interface giving a hard drive and music 5000 emulator all on a pizero. I've done some of the basic thinking about this.
This quote should be on this thread ;)
by fordp
Thu Mar 08, 2018 8:18 am
Forum: other vintage computer hardware, software and games
Topic: No more leaded solder
Replies: 51
Views: 2428

Re: No more leaded solder

tricky wrote:Are you going to any ABug meetups any time soon or RISCOS shows?
No but I could send you some to distribute if you like?
by fordp
Wed Mar 07, 2018 11:14 pm
Forum: other vintage computer hardware, software and games
Topic: No more leaded solder
Replies: 51
Views: 2428

Re: No more leaded solder

I know where I can get my hands on lots of old stock if people need it. Expensive to post Royal Mail however :(
by fordp
Mon Mar 05, 2018 1:00 pm
Forum: other vintage computer hardware, software and games
Topic: ZX Spectrum next... Anybody backing ?
Replies: 122
Views: 10764

Re: ZX Spectrum next... Anybody backing ?

Hmm. This sort of thing makes me realise many people experience retrocomputing in a completely different way from me. It's cool to play with old hardware. It's cool to run old software. That game looks reasonably fun. But aren't they just running a modern game on modern hardware? Since when was a Z...
by fordp
Fri Mar 02, 2018 8:29 pm
Forum: hardware
Topic: Pi Zero Super Interface
Replies: 26
Views: 1893

Re: Pi Zero Super Interface

It is much cheaper and will fit under the BBC Micro. It has plenty of performance.
by fordp
Tue Feb 27, 2018 8:03 pm
Forum: hardware
Topic: Pi Zero Super Interface
Replies: 26
Views: 1893

Re: Pi Zero Super Interface

mph1708 wrote: Perhaps:- 5) A Network interface ? (Ethernet / WiFi)
Indeed, I mentioned Wifi before but we could not find a suitable bare metal Wifi driver. It would be lot of work without a working example.
by fordp
Thu Feb 22, 2018 7:59 am
Forum: hardware
Topic: Pi Zero Super Interface
Replies: 26
Views: 1893

Re: Pi Zero Super Interface

Now that Pi Zero is both available and affordable, a two-pi system is perhaps worth considering. Well that would always be an option. A lot of the fun of the CoPro's is writing your own code on a CoPro of your choice and I think a 1MHz bus CoPro would not be much of a hindrance to doing that. I gue...
by fordp
Wed Feb 21, 2018 1:41 pm
Forum: hardware
Topic: Pi Zero Super Interface
Replies: 26
Views: 1893

Pi Zero Super Interface

I have asked before if with some tweaks a second processor could be run on the 1MHz bus. I think the answer was yes but at 1MHz instead of 2MHz ? It occurred to me that a Pi Zero attached (via level shifters) to the 1MHz bus could be: 1) A Second Processor 2) An MMFS device 3) A SCSI Harddrive ADFS ...
by fordp
Mon Feb 19, 2018 1:51 pm
Forum: off-topic
Topic: Why did CISC prevail?
Replies: 21
Views: 1229

Re: Why did CISC prevail?

hence the Thumb instruction set The Thumb instruction set is a major bugbear of mine. I could rant a lot about it, but shall restrain myself. The one broad point I'll make is that if you look at it carefully and think about what's really going on, you'll likely spot that the technical advantages we...
by fordp
Thu Feb 15, 2018 7:53 pm
Forum: hardware
Topic: Memory for 80286 second processor
Replies: 15
Views: 789

Re: Memory for 80286 second processor

25MHz parts seem to be the fastest but they are PLCC I think.