Search found 442 matches

by simoni
Thu Nov 29, 2018 8:39 am
Forum: hardware
Topic: BeebSCSI 7_7
Replies: 87
Views: 2396

Re: BeebSCSI 7_7

I been trying (and failing) to recreate this issue. I filled a 32Gb card with 20Gbs of SCSI juke directories, with each LUN at 512Mb. In every LUN I put 460Mbs of data and then ran speed tests reading and writing to the LUNs. As expected it gets a little slower, but measured in microseconds not seco...
by simoni
Sat Nov 24, 2018 6:01 am
Forum: hardware
Topic: BeebSCSI Electron - Chicken or Egg?
Replies: 8
Views: 312

Re: BeebSCSI Electron - Chicken or Egg?

SuperForm is included in the quick-start LUN image. Simply LOAD it from the existing LUN (rather than CHAIN) and then issue a *SCSIJUKE to change to another LUN set; then RUN the (already loaded) SuperForm. No floppy required :) You can also simply use the quick-start LUN image and rename the base d...
by simoni
Thu Nov 22, 2018 2:27 pm
Forum: hardware
Topic: VP410/VP415 laserdisc player digital audio?
Replies: 14
Views: 417

Re: VP410/VP415 laserdisc player digital audio?

All of the EEPROMs have been backed up and are available on the Domesday86 site. If you study the schematics even more, you'll discover there are 2 Intel microcontrollers in the player too with baked-in firmware; I've also removed them and rigged up some electronics to read their contents (also avai...
by simoni
Thu Nov 22, 2018 5:59 am
Forum: hardware
Topic: VP410/VP415 laserdisc player digital audio?
Replies: 14
Views: 417

Re: VP410/VP415 laserdisc player digital audio?

To be frank, the easiest way to play a disc with digital audio is to simply use a LaserDisc player that has that facility already. The Philips VP415 is a desirable player since it can understand the Domesday AIV format... but it's not actually a 'good' LaserDisc player by any means, especially when ...
by simoni
Thu Nov 01, 2018 2:47 pm
Forum: software
Topic: RISC OS relicensed: now under Apache 2.0!
Replies: 81
Views: 2364

Re: RISC OS relicensed: now under Apache 2.0!

OK, so essentially the "retro" part of your statement was irrelevant. That makes a lot more sense now, thanks. If that's how you choose to interpret it, then I guess it's up to you. Seems you read the first two sentences you quoted but not the third - which clearly (I thought) explained that it was...
by simoni
Thu Nov 01, 2018 4:18 am
Forum: software
Topic: RISC OS relicensed: now under Apache 2.0!
Replies: 81
Views: 2364

Re: RISC OS relicensed: now under Apache 2.0!

So I'm wondering, what would the development focus be for a "retro" hobby OS version of RISC OS? Are they incompatible with the above, or have I misunderstood you and your "retro" hobby OS is actually my "modern" hobby OS? I think this has been answered already above but just to be direct: It's not...
by simoni
Wed Oct 31, 2018 8:18 pm
Forum: software
Topic: RISC OS relicensed: now under Apache 2.0!
Replies: 81
Views: 2364

Re: RISC OS relicensed: now under Apache 2.0!

I'll freely admit that I'm using a broad-sweeping brush by way of exemplification; but the underlying point still stands. Linux and Windows are the two biggest OSs out there and Microsoft is manoeuvring for a bigger slice of the embedded market place - right now they are big in applications requirin...
by simoni
Wed Oct 31, 2018 6:59 pm
Forum: software
Topic: RISC OS relicensed: now under Apache 2.0!
Replies: 81
Views: 2364

Re: RISC OS relicensed: now under Apache 2.0!

Referring back so an earlier point about whether there is any money to be made from RiscOS, what else is there available for embedded ARM? Which of these are actually used? Software engineers tend to have a limited view of the business dynamics involved in mass production (or even short-run product...
by simoni
Tue Oct 30, 2018 2:50 pm
Forum: software
Topic: RISC OS relicensed: now under Apache 2.0!
Replies: 81
Views: 2364

Re: RISC OS relicensed: now under Apache 2.0!

ROOL are looking towards corporate sponsorship as a way of getting the DDE is be freely available. At this point, they are aware it is a barrier. Why is corporate sponsorship necessary? Just make it free. If they need to fund ROOL to cover costs, state the costs and ask for donations - but don't ma...
by simoni
Tue Oct 30, 2018 11:32 am
Forum: software
Topic: RISC OS relicensed: now under Apache 2.0!
Replies: 81
Views: 2364

Re: RISC OS relicensed: now under Apache 2.0!

It won't have a better chance Funny enough, that's what everyone was saying when the Pi was first released... and the combination of licensing, DDE payments and shear nasty attitudes on the ROOL forums killed it then too. I remain ever hopeful that eventually they'll (ROOL and RODev) figure out wha...
by simoni
Tue Oct 30, 2018 4:41 am
Forum: software
Topic: RISC OS relicensed: now under Apache 2.0!
Replies: 81
Views: 2364

Re: RISC OS relicensed: now under Apache 2.0!

It really depends on how you look at it. If I take something Apache 2.0 licensed and add something to it; I can place my additions under GPLv3 (since Apache 2.0 is compatible in one direction). The original code is still Apache 2.0, but the combination of my code and the original together is only av...
by simoni
Mon Oct 29, 2018 4:58 am
Forum: software
Topic: RISC OS relicensed: now under Apache 2.0!
Replies: 81
Views: 2364

Re: RISC OS relicensed: now under Apache 2.0!

Nothing to stop ROOL taking it and relicensing it under GPL Even more important, there's nothing to stop anyone from forking it and placing it under the GPL. Once it's on git it would be a simple process create a fork and automate the process of merging changes to the Apache 2.0 code. If ROOL insis...
by simoni
Tue Oct 16, 2018 3:38 am
Forum: hardware
Topic: SmallyMouse2 - Universal USB to Quadrature mouse converter
Replies: 64
Views: 6573

Re: SmallyMouse2 - Universal USB to Quadrature mouse converter

I use a logitech mouse myself, so I know that works.

The SM2 is designed to talk USB HID to the mouse; it doesn't talk to other USB devices - so a hub probably won't work.
by simoni
Thu Oct 11, 2018 2:59 am
Forum: hardware
Topic: BeebSCSI 7_7
Replies: 87
Views: 2396

Re: BeebSCSI 7_7

I'm buried in coding on another project at the moment which I need to finish (past of the LaserDisc decoding work for Domesday86) which is why I haven't had time to look into this yet. It's entirely possible that there are some quick optimisation wins by modifying the code. The idea of the open desi...
by simoni
Tue Oct 09, 2018 8:40 am
Forum: hardware
Topic: BeebSCSI 7_7
Replies: 87
Views: 2396

Re: BeebSCSI 7_7

Yes, there is no way the firmware update from the SD card can overwrite the bootloader - so you can happily hop from firmware to firmware. If an update fails, you can just do it again. The only restriction is that the bootloader doesn't understand exFAT, so the upgrade SD card needs to be FAT. The m...
by simoni
Tue Oct 09, 2018 8:24 am
Forum: hardware
Topic: BeebSCSI 7_7
Replies: 87
Views: 2396

Re: BeebSCSI 7_7

I'm seeing exactly the same problem "exactly the same" as in long access times or "exactly the same" as in log access times and 2C disc errors? I can see from the logs you provided (thanks!) that the final read6 command in the log takes 1.26 seconds to seek and retrieve the data from the SD card - ...
by simoni
Mon Oct 08, 2018 12:07 pm
Forum: hardware
Topic: BeebSCSI 7_7
Replies: 87
Views: 2396

Re: BeebSCSI 7_7

or 5) The computer ;)
by simoni
Mon Oct 08, 2018 11:50 am
Forum: hardware
Topic: BeebSCSI 7_7
Replies: 87
Views: 2396

Re: BeebSCSI 7_7

At first it was considerably worse, waiting 10 seconds part way through my read test and then giving disc error 2C to every subsequent access, and not correcting itself till either the card was reinserted or the board powered off. It seems to have settled down now, but the sluggish read times persi...
by simoni
Sun Oct 07, 2018 6:24 pm
Forum: hardware
Topic: BeebSCSI 7_7
Replies: 87
Views: 2396

Re: BeebSCSI 7_7

BeebSCSI is open-source - for details of how the sense and translate commands work take a look at this: https://github.com/simoninns/BeebSCSI/blob/master/BeebSCSI_AVR/BeebSCSI_AVR/scsi.c#L1308 The code is commented; so it should be easy to understand. As for the slow-down - well SD card access times...
by simoni
Sun Oct 07, 2018 4:24 am
Forum: hardware
Topic: BeebSCSI 7_7
Replies: 87
Views: 2396

Re: BeebSCSI 7_7

It doesn't fit under a Master of course, so I had to use a 34-way extension cable. It's a bit unfortunate that the board gets in the way of the lugs on an extension cable, so in the end I had to use one without lugs. I also had to bend the power pins up a bit to get anything to plug into them. The ...
by simoni
Tue Sep 25, 2018 7:53 pm
Forum: hardware
Topic: BeebSCSI 7_7
Replies: 87
Views: 2396

Re: BeebSCSI 7_7

If there is an incompatibility I'd put good money on it not being the BeebSCSI - it was very carefully designed to follow Acorn's 1MHz bus application note and uses the Acorn specified page addresses for SCSI; other devices (especially IDE devices) illegally use the reserved SCSI page FC mapping. As...
by simoni
Tue Sep 25, 2018 7:37 pm
Forum: hardware
Topic: BeebSCSI 7_7
Replies: 87
Views: 2396

Re: BeebSCSI 7_7

I'm glad you are having some success with the boards :) There are lots of BeebSCSIs in use, and it acts exactly like a real Winchester. So if you are having issues it's 99.99% sure it isn't the BeebSCSI design - far more likely to be incorrect assembly or a dodgy Beeb/connector. It works fine with t...
by simoni
Fri Sep 21, 2018 3:58 am
Forum: hardware
Topic: BeebSCSI 7_7
Replies: 87
Views: 2396

Re: BeebSCSI 7_7

I've never quite worked out why that happens sometimes - I guess it could be something to do with the pre-installed bootloader interfering with the fuse programming; still, you are up and running - once you have the solid flash, you are in BeebSCSI bootloader land - just pop the BEEBSCSI.bin on an S...
by simoni
Thu Sep 20, 2018 8:49 pm
Forum: hardware
Topic: BeebSCSI 7_7
Replies: 87
Views: 2396

Re: BeebSCSI 7_7

Sometimes the AVR can be a little odd. Try programming it first and then setting the fuses. It can jiggle it into working. On the other hand it could be the programmer; you could also try lowering the programming clock speed.
by simoni
Fri Sep 14, 2018 5:11 am
Forum: hardware
Topic: Acorn Domesday AIV SCSI Boards - now free...
Replies: 28
Views: 1618

Re: Acorn Domesday AIV SCSI Boards - now free...

I've finally got around to making a full write-up for this project; it's available from the following link: https://www.domesday86.com/?page_id=2407 I have one of these boards running in a real Domesday system - works perfectly (and probably a lot more reliable than the original since all the parts ...
by simoni
Thu Sep 13, 2018 1:35 pm
Forum: hardware
Topic: Philips VP415 Front-loader replacement module
Replies: 0
Views: 135

Philips VP415 Front-loader replacement module

If you're repairing or restoring Domesday systems (or work with one of the museums that maintains a system), this project should be of interest. It's a drop-in replacement for the front-loader switches (and loader motor H-bridge) and replaces the original Philips board which was prone to damage as t...
by simoni
Mon Aug 20, 2018 4:27 pm
Forum: hardware
Topic: SCSI/HADFS/ADFS/Partitions
Replies: 8
Views: 241

Re: SCSI/HADFS/ADFS/Partitions

On question 1 - afaik there is no partition support (certainly not in 8-bit ADFS). The only thing it supports is multiple LUNs through a single SCSI-1 controller. BeebSCSI does all of this via emulation of SCSI towards a single SD card that has the LUN images on it. If you want to make a single SCSI...
by simoni
Fri Aug 17, 2018 5:49 am
Forum: hardware
Topic: Broken New AP5 Fixed & Electron Mouse testing
Replies: 75
Views: 1882

Re: Broken New AP5 Fixed & Electron Mouse testing

SmallyMouse2 doesn't require a PS/2 compatible mouse - it has real USB support. Any mouse should work, even wireless ones. The only hardware reason SmallyMouse wouldn't work with something (assuming the connections are correct) is power - USB requires 5V. The interface to the computer is basically a...
by simoni
Mon Aug 06, 2018 11:10 am
Forum: hardware
Topic: BeebSCSI 7_7
Replies: 87
Views: 2396

Re: BeebSCSI 7_7

I've now added a 3D printable case for the BeebSCSI board to the Github (both OpenSCAD and STL files are available). The case is completely reconfigurable in openSCAD (you can change the size, ports and decoration): 1.jpg Note that the BeebSCSI board requires all connectors to be right-angle (except...
by simoni
Sun Jul 22, 2018 8:15 pm
Forum: hardware
Topic: BeebSCSI 7_7
Replies: 87
Views: 2396

Re: BeebSCSI 7_7

In the 7_7 design both the CPLD and AVR are joined in a JTAG chain, so there is only one JTAG header for both chips. The reason there are two headers labelled JTAG is that one is a standard 10 pin JTAG header suitable for both AVR and Xilinx programmers and the other is a tag-connect header. Tag-con...