Search found 593 matches

by philpem
Tue Dec 01, 2020 2:27 am
Forum: 32-bit acorn hardware
Topic: CC Eagle M2 hardware and software resources
Replies: 1
Views: 61

Re: CC Eagle M2 hardware and software resources

Added a note about Eidos ESCAPE and Replay3.

Short summary: don't install Replay3, it breaks ESCAPE.
by philpem
Tue Dec 01, 2020 1:07 am
Forum: 32-bit acorn hardware
Topic: Risc PC – error code 00000399 / blue screen / recover hard disk contents
Replies: 13
Views: 128

Re: Risc PC – error code 00000399 / blue screen / recover hard disk contents

I haven't got much to add in regards recovering the data - except that to say that if you hook it up to a Raspberry Pi, you can make an image of the drive, which you can then use with the RPCEmu RISC PC emulator. Start with the drive unplugged. Do "ls /dev/sd*" to find out which disks the kernel kno...
by philpem
Mon Nov 30, 2020 3:45 am
Forum: 32-bit acorn software: other
Topic: Any potential for replacement disks?
Replies: 3
Views: 101

Re: Any potential for replacement disks?

There may be ways to recover the disks. It's possible to clean off the mould with some care, and read the discs into HFE files which could be loaded into a Gotek emulator. I've got the kit to do it and the drives here - please feel free to PM me on the forum, or feel free to email me at philpem@gmai...
by philpem
Mon Nov 30, 2020 3:37 am
Forum: 32-bit acorn hardware
Topic: CC Eagle M2 hardware and software resources
Replies: 1
Views: 61

CC Eagle M2 hardware and software resources

I figured I'd start a thread to collect together some of the information about the Computer Concepts / Wild Vision Eagle M2... Where can I get the manuals and software? Chris's Acorns has the User Guide: http://chrisacorns.computinghistory.org.uk/docs/CC/CC_EagleUG.pdf And the RISC PC Supplement: ht...
by philpem
Mon Nov 30, 2020 2:23 am
Forum: 32-bit acorn hardware
Topic: The Risc PC SIMM compatibility chestnut - voltage issues - 3.3V dressed as 5V!
Replies: 0
Views: 52

The Risc PC SIMM compatibility chestnut - voltage issues - 3.3V dressed as 5V!

RISC PC SIMM compatibility seems to be one of those threads that never ends... but please, hear me out. This one might surprise you. I've been playing around with my StrongARM RISC PC (again), chasing what I suspect to be a RAM issue. I get a variety of weird errors when I middle-click the hard driv...
by philpem
Sun Nov 29, 2020 8:43 pm
Forum: 32-bit acorn hardware
Topic: RISC PC Issue 3 audio differences
Replies: 5
Views: 405

Re: RISC PC Issue 3 audio differences

Sounds like my problems may not be SA related after all then... I've got working sound now - but the video input isn't working. I'm getting a greyscale image which appears to be completely out of sync - the live preview is rolling and tumbling. I've just tried it in the ARM610 RISC PC and get the sa...
by philpem
Sun Nov 29, 2020 1:06 pm
Forum: archive submissions
Topic: Eagle M2 podule ROM
Replies: 0
Views: 32

Eagle M2 podule ROM

Computer Concepts / Wild Vision Eagle M2 Podule ROM

Chip: Macronix (MXIC) MX27C1000DC-15 (150ns)

Intel Hex and raw binary formats included.
by philpem
Sun Nov 29, 2020 3:58 am
Forum: 32-bit acorn hardware
Topic: RISC PC Issue 3 audio differences
Replies: 5
Views: 405

Re: RISC PC Issue 3 audio differences

I've had a play around with this. The first problem is that the pinout of the audio port has changed between the Mk1/Mk2 and the Mk3 RISC PC motherboards: The Unfiltered VIDC audio L/R on pins 1 and 9 is gone -- these now carry Line In Left and Right respectively. The headphone audio output L/R on p...
by philpem
Fri Nov 27, 2020 9:06 am
Forum: 32-bit acorn hardware
Topic: Can I use a PC Monitor on my StrongArm Risc PC
Replies: 17
Views: 546

Re: Can I use a PC Monitor on my StrongArm Risc PC

If you run the wires point-to-point, there's no need to connect the battery wiring to the bottom of the board at all. The battery negative wiring is just a resistor to logic ground. The positive wiring is a 47-ohm resistor to the charging circuit (the diode) and a 180-ohm to an electrolytic capacito...
by philpem
Thu Nov 26, 2020 4:39 pm
Forum: 32-bit acorn hardware
Topic: RISC PC Issue 3 audio differences
Replies: 5
Views: 405

Re: RISC PC Issue 3 audio differences

Holy Necrothread, Batman! Did you ever get this sorted, Ian? I've just picked up an Eagle M2 and I'm planning on doing the same. LK13 is "Auxiliary Audio Connector A", according to the TRM: https://4corn.co.uk/archive/docs/Acorn%20Risc%20PC%20Technical%20Reference%20Manual-opt.pdf PDF page 53 has th...
by philpem
Thu Nov 26, 2020 4:31 pm
Forum: 32-bit acorn hardware
Topic: Can I use a PC Monitor on my StrongArm Risc PC
Replies: 17
Views: 546

Re: Can I use a PC Monitor on my StrongArm Risc PC

I have identified a couple of areas where a resistor is not connected to its intended pad because of the damage caused by the leaking battery. Is it alright to drill down the centre of a pad, using something like a 0.6mm drill and solder a link through the board to the resistor because the pad on t...
by philpem
Sun Nov 22, 2020 8:51 pm
Forum: 32-bit acorn software: classic games
Topic: missing archived games / Grievous Bodily Arm
Replies: 4
Views: 229

Re: missing archived games / Grievous Bodily Arm

Ownership passed on to APDL (after CJE sold the 4D software line to them) -- which means it's pretty well tied up after David Holden's passing. In general terms, there was historically a lot of resistance (from a number of people) "back in the day". Emulation got conflated with piracy, tempers ran h...
by philpem
Sat Nov 21, 2020 5:57 pm
Forum: 32-bit acorn hardware
Topic: Previously working Acorn A4 won't start
Replies: 2
Views: 145

Re: Previously working Acorn A4 won't start

Every one of them will need recapping -- that is to say, every single tin-can surface-mount capacitor on the motherboards will need to be replaced. You'll also need to clean the motherboard very, very well to remove the residual capacitor goo. It's worth replacing the CMOS battery at the same time, ...
by philpem
Fri Nov 20, 2020 8:53 am
Forum: 32-bit acorn software: other
Topic: Ex school software
Replies: 3
Views: 202

Re: Ex school software

I've got the facilities to image them here - and can provide you with HFE and ADF image files. I'm involved with a semi-informal group on here which is trying to archive RISC OS software. (I did a talk on this at one of the ABUG meetings and the recent ROUGOL online "London" show) The HFE file would...
by philpem
Tue Nov 17, 2020 3:15 pm
Forum: 32-bit acorn hardware
Topic: Risc PC, PC Card and Ethernet - Solved!
Replies: 20
Views: 396

Re: Risc PC, PC Card and Ethernet

If you haven't got NetLinks in the PC Card config, then the Network Links software isn't installed. If memory serves, it's not included in the "open source" !PCPro release, but a working version is included in the last Aleph One release. Installation is a bit fiddly... Install PCPro (last Aleph One ...
by philpem
Sun Nov 15, 2020 9:09 pm
Forum: 32-bit acorn hardware
Topic: Connor HDD "restoration"
Replies: 2
Views: 136

Re: Connor HDD "restoration"

I've seen similar issues in the Conner 2.5in laptop drives (eg CP2064). There's a rubber bumper in the actuator assembly which perishes. This reduces the gap between the actuator arm and the locking magnet to the point where the actuator can't release itself on startup. The solution is to do what yo...
by philpem
Fri Nov 13, 2020 4:56 pm
Forum: for sale / freebies
Topic: Hybrid Music System
Replies: 12
Views: 750

Re: Hybrid Music System

Thank for the information - I did get your PM but don't seem to be able to respond to them myself at the moment! If you hit the Contact Us button at the bottom of the page, you can ask the admins to enable the PM feature for you. If I remember rightly it's only disabled to keep the spam-bots away!
by philpem
Fri Nov 13, 2020 4:51 pm
Forum: 32-bit acorn hardware
Topic: A30x0/A4000 power-on-reset / Brownout ?
Replies: 3
Views: 128

Re: A30x0/A4000 power-on-reset / Brownout ?

Have you checked your power supply?

If 5V (or possibly one of the other rails) is slow to come up or noisy, you might get reset issues.
by philpem
Fri Nov 13, 2020 4:47 pm
Forum: 32-bit acorn hardware
Topic: RISCPC Power Supply Refurbish - 4 Kits Available
Replies: 54
Views: 2635

Re: RISCPC Power Supply Refurbish

Has anyone used the Artic fans? I like the look of the temperature sensor driven ones here: https://www.ebay.co.uk/itm/Arctic-Cooling-F8-TC-80mm-Case-Fan-2000-RPM-AFACO-080T0-GBA01-AC-Artic/181636377661?epid=25017737071&hash=item2a4a5f2c3d:g:KmMAAOSwhBNdtfpG I am assuming 80mm for the RISCPC PSU to...
by philpem
Fri Nov 13, 2020 4:46 pm
Forum: 32-bit acorn hardware
Topic: A3000 Risc upgrade
Replies: 6
Views: 323

Re: A3000 Risc upgrade

Can you post some photos of the IDE card? We can probably tell you what it is :) If it's the Castle A3000 one, it works under ADFS. You need !HForm (which comes on the RISC OS 3 Applications disks, but newer versions are available) to format a hard disk. If you're happy to program an EPROM (I may ev...
by philpem
Fri Nov 13, 2020 4:40 pm
Forum: 32-bit acorn hardware
Topic: Can I use a PC Monitor on my StrongArm Risc PC
Replies: 17
Views: 546

Re: Can I use a PC Monitor on my StrongArm Risc PC

Oh - one thing I forgot - try this... Power off. Hold the DELETE key on the keyboard. Power on. This might get the machine to boot - RISC PCs auto detect the monitor type on a delete-boot. You might get lucky, but if the CMOS chip is bust the machine may not boot at all. Looking at those photos, I'd...
by philpem
Fri Nov 13, 2020 4:31 pm
Forum: 32-bit acorn hardware
Topic: Can I use a PC Monitor on my StrongArm Risc PC
Replies: 17
Views: 546

Re: Can I use a PC Monitor on my StrongArm Risc PC

Ouch, that's nasty... Looks like a few of the tracks leading to the realtime clock chip are, well... shot. You're going to need to check the circuitry around the battery with a multimeter - and possibly replace some of the parts, or solder in wires to replace broken tracks. This recent thread should...
by philpem
Sun Nov 08, 2020 5:10 pm
Forum: 32-bit acorn hardware
Topic: A3020 has died or did I broke smth?
Replies: 27
Views: 780

Re: A3020 has died or did I broke smth?

If your A3000 is now alive, you should be able to check your mouse :) Yep, and it was just fine with A3000, but no movement with 3020. It may occasionally start to move, and does so until power is off. There is no any logical consequence. I am considering to refresh the solder on mouse socket thoug...
by philpem
Tue Nov 03, 2020 12:06 pm
Forum: 32-bit acorn hardware
Topic: How do you add a second hard disk?
Replies: 6
Views: 312

Re: How do you add a second hard disk?

I was going to say -- that board looks like a Cumana or Eesox adapter for the Panasonic proprietary CD-ROM interface (SLCD). It was used on the Panasonic CR-562 and CR-563 drives, then the CD drive manufacturers moved to IDE when the ATAPI spec was ratified. Aside from the SCSI drives, that is. To s...
by philpem
Tue Oct 27, 2020 6:16 pm
Forum: wanted
Topic: WTD - A4000 case
Replies: 5
Views: 232

Re: WTD - A4000 case

£50 for the last one I bought and it's pretty good. https://www.servercase.co.uk/ Aye, I've got the 6-bay 2U one. Unfortunately the form factor of the A4000 motherboard is nothing like ATX, so using one of those would be a right pain in the bum at best. I was looking at the Schroff rackmount cases ...
by philpem
Tue Oct 27, 2020 5:59 pm
Forum: wanted
Topic: WTD - A4000 case
Replies: 5
Views: 232

Re: WTD - A4000 case

stevebubs wrote:
Tue Oct 27, 2020 3:51 pm
Location?
I'm in the North of England (West Yorkshire specifically). But I'd think location was largely irrelevant given the availability of cardboard boxes and the postal service :D
by philpem
Tue Oct 27, 2020 1:21 pm
Forum: 32-bit acorn hardware
Topic: A3020 has died or did I broke smth?
Replies: 27
Views: 780

Re: A3020 has died or did I broke smth?

Looks like it could potentially be multiple faults, we need some more information... What condition is the battery in? Any corrosion, "fuzz" or similar? Does the motherboard around the battery look blackened, discoloured, have matted solder joints, or look damaged in any way? Have any of the pins on...
by philpem
Tue Oct 27, 2020 1:11 pm
Forum: wanted
Topic: WTD - SCSI 5.25in enclosure / external box
Replies: 0
Views: 101

WTD - SCSI 5.25in enclosure / external box

Is anyone looking to shift a SCSI external drive box? I need one with a 50pin IDC or 68pin D as the internal connector, and which can take a 5.25-inch drive (size of a standard CDROM drive). With or without drive is fine. Just need a couple to case up some of my SCSI kit so I can share it between th...
by philpem
Mon Oct 26, 2020 8:38 pm
Forum: 32-bit acorn hardware
Topic: Help please! My Acorn Risc PC will not go past a blue screen
Replies: 18
Views: 821

Re: Help please! My Acorn Risc PC will not go past a blue screen

Ahhh, a "fire-poker" soldering iron... I wouldn't use one, personally. The long heating element tends to make them hard to control on tight PCBs. Your soldering tip is corroded and blackened, so replace it before using the iron. Make sure you tin the new tip with fresh solder as it heats up. Do you ...

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