Search found 8582 matches

by hoglet
Wed Nov 13, 2019 2:50 pm
Forum: off-topic
Topic: Solder/flux recommendations
Replies: 12
Views: 648

Re: Solder/flux recommendations

Hi all, I need to invest in some finer gauge solder for SMD work (the 0.7mm reel I have is really too thick). Looking at RS, there are a few possbilities. All are 60/40 Sn/Pb, but they differ in flux type: - RS Pro 0.4mm includes 1.0% ORL0 flux (Rosin/Resin Free) £26.53 https://uk.rs-online.com/web/...
by hoglet
Mon Nov 11, 2019 9:11 pm
Forum: hardware
Topic: OSWORD &7F on DFS vs MMFS
Replies: 11
Views: 242

Re: OSWORD &7F on DFS vs MMFS

kieranhj wrote:
Mon Nov 11, 2019 8:45 pm
Would you prefer this to be filed as an issue on GitHub?
Yes please, then I won't forget about it.

Dave
by hoglet
Mon Nov 11, 2019 12:16 pm
Forum: acorn atom and system
Topic: ICE T65/Z80/6809
Replies: 745
Views: 62281

Re: ICE T65/Z80/6809

Just realising I have a P2000 under my bed I might be able to add to the list. Unfortunately health (concentration) wise I'm not up to speed (yet) :( That would be good to add to the list, but your health comes first! I'm continuing to work on the firmware (upto version 0.95 now...) Several new fea...
by hoglet
Mon Nov 11, 2019 9:32 am
Forum: hardware
Topic: OSWORD &7F on DFS vs MMFS
Replies: 11
Views: 242

Re: OSWORD &7F on DFS vs MMFS

daveejhitchins wrote:
Mon Nov 11, 2019 9:08 am
hoglet wrote:
Mon Nov 11, 2019 9:01 am
(I'm assuming this is using the Electron Printer Port build of MMFS)
I wouldn't have thought so, as it's in a cartridge!
Ah, but I believe all of Ramtop's interfaces re-implement a Electron Printer Port (EPP) interface in the CPLD for driving the SD Card, even the cartridge port one.

Dave
by hoglet
Mon Nov 11, 2019 9:01 am
Forum: hardware
Topic: OSWORD &7F on DFS vs MMFS
Replies: 11
Views: 242

Re: OSWORD &7F on DFS vs MMFS

0xC0DE wrote:
Mon Nov 11, 2019 8:04 am
What is the expected speed of MMFS on such a setup?
Absolutely no idea, but significantly slower than the user port version, because the SPI interface is being bit-banged.

I would guess about half the speed.

(I'm assuming this is using the Electron Printer Port build of MMFS)

Dave
by hoglet
Mon Nov 11, 2019 8:56 am
Forum: hardware
Topic: OSWORD &7F on DFS vs MMFS
Replies: 11
Views: 242

Re: OSWORD &7F on DFS vs MMFS

I can’t answer your questions #-o but I do have some to add of my own. The Teletext Bad Apple demo uses OSWORD &7F for multi-sector reads and used to work fine on MMFS (in fact I recall I had to make some changes to the way the streaming worked to accommodate) but I haven’t been able to get it runn...
by hoglet
Mon Nov 11, 2019 7:42 am
Forum: hardware
Topic: OSWORD &7F on DFS vs MMFS
Replies: 11
Views: 242

Re: OSWORD &7F on DFS vs MMFS

My first question: I know MMFS is based on DFS but the underlying medium (SD-card) is much faster. Is MMFS artificially kept at the same speed as DFS? Because I am getting similar throughput speeds. Max 5.5Kb/s. I thought MMFS would be much faster than that. MMFS does not deliberately slow it's sel...
by hoglet
Fri Nov 08, 2019 1:57 pm
Forum: acorn atom and system
Topic: ICE T65/Z80/6809
Replies: 745
Views: 62281

Re: ICE T65/Z80/6809

Will this be a fix on the 0.90 version or does it get a 0.91 number ? There should be a 0.92 version on github now: https://github.com/hoglet67/AtomBusMon/commits/dev What's been tricky about the Z80 IORQ timings is that sometimes IORQ changes on the falling edge of the clock, sometimes it changes ...
by hoglet
Fri Nov 08, 2019 1:04 pm
Forum: acorn atom and system
Topic: ICE T65/Z80/6809
Replies: 745
Views: 62281

Re: ICE T65/Z80/6809

Here's the final ICE update for today.... (probably) Next up on the ICE test bench we have a Camputers Lynx (kindly loaned by Revaldhino): IMG_1797.JPG This is a 4MHz Z80 based machine: IMG_1798.JPG Let's replace the Z80 with the ICE-Z80: IMG_1799.JPG And take a closer look: IMG_1802.JPG This is a v...
by hoglet
Fri Nov 08, 2019 12:14 pm
Forum: acorn atom and system
Topic: ICE T65/Z80/6809
Replies: 745
Views: 62281

Re: ICE T65/Z80/6809

Here's some photos of the revised 65C02 CPU Adapter (the version is now 1.10): IMG_1810.JPG IMG_1811.JPG IMG_1812.JPG IMG_1813.JPG The only change from version 1.00 is to allow for weak (22K) pullup resistors on: - nSO (R16) - nRST (R17) - nRDY (R18) - nIRQ (R19) - nNMI (R20) You can see these under...
by hoglet
Fri Nov 08, 2019 12:06 pm
Forum: acorn atom and system
Topic: ICE T65/Z80/6809
Replies: 745
Views: 62281

Re: ICE T65/Z80/6809

Here's some photos of the 6809E CPU Adapter (version 1.00): IMG_1805.JPG IMG_1806.JPG IMG_1807.JPG IMG_1809.JPG So far this has just been tested in the Dragon 32. As I mentioned a few posts up, I needed to populate the clock filter components (R14=120R and C15=47pF) to get it top operate stably, bec...
by hoglet
Fri Nov 08, 2019 11:07 am
Forum: acorn atom and system
Topic: Yarrb - redesigned
Replies: 54
Views: 1608

Re: Yarrb - redesigned

The technique demonstrated in that video is a very poor way of soldering surface mount ICs. Putting solder on the pads causes them to be lumpy, making it more difficult to align the chip. Its pins will tend to slide into the gaps between the pads. And using a hot air gun is slow and subjects the ch...
by hoglet
Thu Nov 07, 2019 8:02 pm
Forum: acorn atom and system
Topic: YARRB [SOLD OUT]
Replies: 265
Views: 16720

Re: YARRB [SOLD OUT]

AtoMMC works fine with either the original 6502 or a spare Model B one. It really hates the W65C02S6TPG-14. Please can someone just clarify the JP4 positions for 6502 vs 65C02? As far as I can tell, the pins aren't labelled, and the various pictures people have posted seem to contradict each other....
by hoglet
Thu Nov 07, 2019 9:51 am
Forum: hardware
Topic: RGB to HDMI using a Pi Zero and a small CPLD
Replies: 800
Views: 44349

Re: RGB to HDMI using a Pi Zero and a small CPLD

Nice work Ian. By the way, I'm currently using the original RGBtoHDMI reasonably successfully with an Amstrad CPC 464: capture10.png I fitted 330R termination resistors, and it can just about descriminate the three level RGB signals, due to the differeing thresholds of the 74LS08 buffer and the CPLD...
by hoglet
Wed Nov 06, 2019 6:18 pm
Forum: acorn atom and system
Topic: ICE T65/Z80/6809
Replies: 745
Views: 62281

Re: ICE T65/Z80/6809

Hi Bram, WARNING:PhysDesignRules:2410 - This design is using one or more 9K Block RAMs (RAMB8BWER). 9K Block RAM initialization data, both user defined andINFO:TclTasksC:1850 - process run : Generate Programming File is done. default, may be incorrect and should not be used. For more information, pl...
by hoglet
Wed Oct 30, 2019 7:36 pm
Forum: upcoming and recent events & exhibitions
Topic: ABUG SOUTH 22 to 24 November 2019 - NOW FULL - but accepting names for reserve list
Replies: 97
Views: 3598

Re: ABUG SOUTH 22 to 24 November 2019 - NOW FULL - but accepting names for reserve list

tricky wrote:
Wed Oct 30, 2019 7:05 pm
I know it is cheeky, but does anyone feel like having a look at my poorly beeb that I have had for 35 years, or my Atom that has developed a new fault whilst at ABUG?
I'll have both ICE-6502 and the 6502Decoder with me, so happy to see if either of these tools sheds any light.

Dave
by hoglet
Tue Oct 29, 2019 9:00 pm
Forum: acorn atom and system
Topic: Yarrb - redesigned
Replies: 54
Views: 1608

Re: Yarrb - redesigned

Hand soldering 0.5mm pitch QFPs is possible, with a little practice and lots of flux :D

I've done this exactly once though!

I'll post a picture later.

Dave
by hoglet
Tue Oct 29, 2019 5:32 pm
Forum: acorn atom and system
Topic: Yarrb - redesigned
Replies: 54
Views: 1608

Re: Yarrb - redesigned

There was no notice like "Don't use this part because it is discontinued". As far as I'm aware, the XC95288XL-10TQ144C has not been discontinued by Xilinx. The last product discontinuation notice (PDN) affecting the XC9500XL CPLD family was in 2015: https://www.xilinx.com/support/documentation/cust...
by hoglet
Mon Oct 28, 2019 10:20 pm
Forum: acorn atom and system
Topic: Yarrb - redesigned
Replies: 54
Views: 1608

Re: Yarrb - redesigned

Today I got an email from JLC that there is not much demand for the XC95288XL and that there won't be any supply on short term. So I have to check if my board can be redesigned with an '144 ( probably with the same risk of getting no components ) or find another manufacturer :( I don't think that s...
by hoglet
Mon Oct 28, 2019 9:46 am
Forum: hardware
Topic: Loading a ROM into SW Ram - basics
Replies: 39
Views: 829

Re: Loading a ROM into SW Ram - basics

Thanks though don't understand why I can load it to bank 15 fine with one .SSD file but not the identical one I made via beebem. People who got the error, were you adding the ROM to the SSD using beebem? Or were you still getting the illegal error using other software? If you attach both .ssd files...
by hoglet
Sun Oct 27, 2019 1:30 pm
Forum: acorn atom and system
Topic: Aardvark Invaders
Replies: 9
Views: 240

Re: Aardvark Invaders

For some reason I have written on the inside of the cover "3700 CHR SET". No idea what it means, but it must have meant something in 1983. I guess it means that the graphics character data used for the sprites is stored at address 3700 onwards. Useful if someone wanted to produce a customized versi...
by hoglet
Sun Oct 27, 2019 12:46 pm
Forum: acorn atom and system
Topic: Aardvark Invaders
Replies: 9
Views: 240

Re: Aardvark Invaders

And some images of the packaging:
20191027_125212.jpg
20191027_125208.jpg
by hoglet
Sun Oct 27, 2019 12:19 pm
Forum: acorn atom and system
Topic: Atom Software Archive
Replies: 1214
Views: 147293

Re: Atom Software Archive

TODO reminder:

Add Aardvark Invaders, kindly submitted by David Wallis.

See this thread:
viewtopic.php?f=44&t=18158

Add AGD packs 42...

Dave
by hoglet
Sun Oct 27, 2019 12:15 pm
Forum: acorn atom and system
Topic: Aardvark Invaders
Replies: 9
Views: 240

Re: Aardvark Invaders

Sent! Thank you ever so much David - this is the first MIA title recovered in over a year. Here's the extracted ATM file: INVADER.zip To try this in Atomulator, do the following: - unzip INVADER.zip to the Atomulator/mmc directory - start Atomulator Screenshot from 2019-10-27 12-13-36.png Screensho...
by hoglet
Sun Oct 27, 2019 11:53 am
Forum: acorn atom and system
Topic: Aardvark Invaders
Replies: 9
Views: 240

Re: Aardvark Invaders

I was clearing out the attic today and found a walkman. I have made a recording of Aardvark Invaders. How do I upload it, or who should I send it to? Brilliant! It's probably to large to attach to this thread, even if you zip it (there is a 5MB limit). You can either upload it to somewhere like dro...
by hoglet
Sat Oct 26, 2019 8:33 pm
Forum: hardware
Topic: B+ Raspberry PI 2nd Processor issue
Replies: 3
Views: 227

Re: B+ Raspberry PI 2nd Processor issue

I’m not see the boot message for Tube on my B+. I see that the Raspberry PI is powered and I’m using DFS 2.26 which should have the Tube code. Should I change a setting in a config file on the SD card? In general, you should not need to change any settings in the config file to get a working system...
by hoglet
Sat Oct 26, 2019 1:30 pm
Forum: hardware
Topic: MMFS Development and Support
Replies: 949
Views: 66927

Re: MMFS Development and Support

DaveLecky wrote:
Sat Oct 26, 2019 1:06 pm
There isn’t a ZMMFS for the electron printer port installation unfortunately, would have been handy.
There is now:
https://github.com/hoglet67/MMFS/releases

Dave
by hoglet
Sat Oct 26, 2019 10:44 am
Forum: hardware
Topic: Loading a ROM into SW Ram - basics
Replies: 39
Views: 829

Re: Loading a ROM into SW Ram - basics

You might want to consider John Welch's DFS Explorer which runs on the MAC: https://www.g7jjf.com/mac_dfs_explorer.htm It's shareware and costs £5.00 to get a version that will let you save. But for free you can download it and test whether it works on what ever version of MACOS you are using. (BTW,...
by hoglet
Wed Oct 23, 2019 5:37 pm
Forum: software: other
Topic: BBC Basic online manual?
Replies: 1
Views: 124

Re: BBC Basic online manual?

Hi, I've just bought a BBC Master and am looking to start playing around with it. Is there any online resource which lists BBC Basic 4 commands and what they do? I've found a ZIP download of the manual (in tif files), but a website listing the commands would be really useful. is there one? Thanks T...
by hoglet
Wed Oct 23, 2019 4:58 pm
Forum: acorn atom and system
Topic: ICE T65/Z80/6809
Replies: 745
Views: 62281

Re: ICE T65/Z80/6809

I am trying to find information on programming the Xilinx Spartan6 - my board has not arrived yet - so no hurry. I understand that Xilinx has its own usb to jtag device (Ebay link to platform cable in the wiki) but how special is it really? I have an USB Blaster that I used for programming Altera C...