Search found 2328 matches

by Prime
Wed Nov 22, 2017 2:26 pm
Forum: off-topic
Topic: Which soldering iron?
Replies: 15
Views: 201

Re: Which soldering iron?

For surface mount work I typically use a bit that is 2mm wide. I can drag solder TQFPs very quickly and get some really nice joints. Wish I could get the hang of that I've tried several times and can't get it to work correctly, so end up using the flood it and wick it method. And yeah I am using le...
by Prime
Wed Nov 22, 2017 2:56 am
Forum: off-topic
Topic: Which soldering iron?
Replies: 15
Views: 201

Re: Which soldering iron?

Not at your stated price point, but I thorourgly recommend the Hako 888D, get one of those and you'll probably never have to replace anything other than maybe the occasional tip. They can even be bought from Maplin now, though there price is about £30 more expensive than other places. Please beware ...
by Prime
Wed Nov 22, 2017 2:52 am
Forum: upcoming and recent events & exhibitions
Topic: ABug Manchester Friday 19th - Sunday 21st January 2018
Replies: 18
Views: 324

Re: ABug Manchester Friday 19th - Sunday 21st January 2018

Should be OK for me so expressing interest.

Phill.
by Prime
Tue Nov 21, 2017 1:14 pm
Forum: acorn atom
Topic: ICE T65/Z80/6809
Replies: 596
Views: 27785

Re: ICE T65/Z80/6809

Right just to help other people on windows, I managed to get the build system working under cygwin on windows with a few minor changes. What you'll need : Cygwin installed and working. The Atmel AVR 8 command line gcc compiler available at : http://www.atmel.com/tools/atmelavrtoolchainforwindows.asp...
by Prime
Sun Nov 19, 2017 11:03 am
Forum: acorn atom
Topic: ICE T65/Z80/6809
Replies: 596
Views: 27785

Re: ICE T65/Z80/6809

Phi0 coming in is resampled by a fixed ~50MHz clock: https://github.com/hoglet67/AtomBusMon/blob/master/src/AtomCpuMon.vhd#L191 to generate Phi0_a, Phi0_b, Phi0_c, Phi0_d (each being 20ns further delayed) Currently: - Phi0_b is used to register read data from the data bus - Phi0_c is used to as an ...
by Prime
Sat Nov 18, 2017 7:08 pm
Forum: acorn atom
Topic: ICE T65/Z80/6809
Replies: 596
Views: 27785

Re: ICE T65/Z80/6809

Oddly I know filling with a value seems to successfully write the value, if I do a fill of the screen RAM the display clears to the used character, reading them back however results in random data. Though it seems slightly better now :) it is still corrupting For example scrolling the screen result...
by Prime
Sat Nov 18, 2017 5:13 pm
Forum: acorn atom
Topic: ICE T65/Z80/6809
Replies: 596
Views: 27785

Re: ICE T65/Z80/6809

I suspect it may be a slight timing issue as for some things the Apple seems to use an externally generated phi1 rather tha the one generated by the CPU. That's the only slightly unusual thing I can spot as well, and it's used in the RAM control signals. Indeed :) Can you work out whether it's RAM ...
by Prime
Sat Nov 18, 2017 2:14 pm
Forum: acorn atom
Topic: ICE T65/Z80/6809
Replies: 596
Views: 27785

Re: ICE T65/Z80/6809

Can you point me at a schematic for your Apple II? Here you go..... ftp://ftp.apple.asimov.net/pub/apple_II/documentation/hardware/schematics/apple_iie_euro_schematic.pdf I suspect it may be a slight timing issue as for some things the Apple seems to use an externally generated phi1 rather tha the ...
by Prime
Sat Nov 18, 2017 12:46 pm
Forum: acorn atom
Topic: ICE T65/Z80/6809
Replies: 596
Views: 27785

Re: ICE T65/Z80/6809

[quote="oss003]
Maybe a 6502 - 65C02 issue?
[/quote]

Possibly, but this Apple has had both an NMOS and WDC CMOS cpu in it and workes fine.

Cheers.

Phill.
by Prime
Sat Nov 18, 2017 11:46 am
Forum: acorn atom
Topic: ICE T65/Z80/6809
Replies: 596
Views: 27785

Re: ICE T65/Z80/6809

Yep Jason has been making them up :) and I have one now. Also I got my Godil converted(desoldered bottom connectors, soldered on jumpers & socket). I've got it plugged into my Apple IIe, and it's not working properly :( Any reads from ROM work fine, and writes to ram are OK, but reads are coming...
by Prime
Fri Nov 17, 2017 9:37 am
Forum: acorn atom
Topic: ICE T65/Z80/6809
Replies: 596
Views: 27785

Re: ICE T65/Z80/6809

Right going to try and program converted Godil at ABUG , I removed the sockets and replaced them with a 40 pin plug (to plug into DIP socket) and 2x50pin jumper blocks. If that doesn't work I've just ordered one of the Spartan 6 boards but will need to get a level converter for it. Has someone made ...
by Prime
Fri Nov 17, 2017 9:34 am
Forum: upcoming and recent events & exhibitions
Topic: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD
Replies: 133
Views: 4187

Re: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD

Well I have most stuff packed just got to move it to the car, as I'm only down the road in Coventry I'll not set out till after lunch as it's less than an hour's drive.

Any last minuyte things anyone wants me to bring?

Cheers.

Phill.
by Prime
Thu Nov 16, 2017 10:19 am
Forum: upcoming and recent events & exhibitions
Topic: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD
Replies: 133
Views: 4187

Re: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD

Phil, I'll try and remember to pack my Atom Econet board.... Does anyone happen to have a 14 pin Xilinx JTAG cable that I can borrow I have an FPGA baord I need to program, the board and programmer both have 14 pin 2mm JTAG, and I don't have a cable....other option is some soldering iron boddgery :)...
by Prime
Tue Nov 14, 2017 12:22 am
Forum: other vintage computer hardware, software and games
Topic: Apple II problem.....
Replies: 6
Views: 200

Re: Apple II problem.....

Doh! That's caught be out a couple of times as well. It should be only the STA that is doing the dummy read (unless you are crossing a page boundary, which I don't think you are). Nope not crossing a page boundry, was really frustrating me as the CPLD and AVR code are well tested and deployed on th...
by Prime
Mon Nov 13, 2017 7:25 pm
Forum: other vintage computer hardware, software and games
Topic: Apple II problem.....
Replies: 6
Views: 200

Re: Apple II problem.....

I *THINK* I have found the problem. The Apple II has a block of IO addresses allocated to each slot 1..7 at $C080 + ($10 * Slot no), so I was doing my I/O by determining the slot number and then doing one of the floowing : lda reg_offs,x sta reg_offs,x Turns out when you do indexed addressing that t...
by Prime
Mon Nov 13, 2017 1:15 pm
Forum: other vintage computer hardware, software and games
Topic: Apple II problem.....
Replies: 6
Views: 200

Re: Apple II problem.....

sirmorris wrote:Remind me - are AVR interrupts edge or level triggered?

Edge in this case falling edge, but you can also trigger on falling edge or low level.

I'm actually just latching the in and checking for it's flag in the main program loop.

Cheers.

Phill.
by Prime
Mon Nov 13, 2017 9:39 am
Forum: other vintage computer hardware, software and games
Topic: Apple II problem.....
Replies: 6
Views: 200

Apple II problem.....

Hi all, I'm trying to cross port the DragonMMC hardware to work in an Apple II machine, seems simple right? So to this end and to allow me to prototype with one of my DragonMMC boards which I know the hardware is good on (as it's now in production). I built an Apple II slot to Dragon Cart port conve...
by Prime
Sat Nov 11, 2017 1:21 am
Forum: wanted
Topic: Master keyboard IDC connector
Replies: 7
Views: 158

Re: Master keyboard IDC connector

a single row pinheader could you point me towards a supplier web page for such an item ? We find finding what we want is very different from knowing what we want. Something like these : https://www.rapidonline.com/truconnect-single-row-header-36-way-pcb-plug-22-0545 Or the right-angle ones : https:...
by Prime
Fri Nov 10, 2017 4:50 pm
Forum: hardware
Topic: Open Source Logic Analyzer Experiments
Replies: 39
Views: 1850

Re: Open Source Logic Analyzer Experiments

Dave, Which driver are you using for your LCsoft board? I used fx2lafw-cypress-fx2.ihx which was what the sigrok page suggested, but I see in your screenshots that it's listed as "sigrok FX2 (16ch)" and in mine as "Cypress FX2". Also is there anything wacky about the order of the...
by Prime
Fri Nov 10, 2017 11:47 am
Forum: wanted
Topic: Master keyboard IDC connector
Replies: 7
Views: 158

Re: Master keyboard IDC connector

What I tend to use for things like this as I have an absolute metric buttload of old floppy & IDE cables, is a single row pinheader on the keyboard and then an appropreate sized cable plugged into it as long as you use the same side on both ends and align them to the same end of the connector it...
by Prime
Tue Nov 07, 2017 12:42 pm
Forum: hardware
Topic: Open Source Logic Analyzer Experiments
Replies: 39
Views: 1850

Re: Open Source Logic Analyzer Experiments

Hi All, Following Dave's instructions I've managed to get sigrock up and running under windows, but wanted to try and merge in his changes to the OLS driver as I actually have this board and it would be useful to be able to set a trigger condition :) Though I do have one of the Cypress boards on ord...
by Prime
Sun Nov 05, 2017 10:32 pm
Forum: acorn atom
Topic: Setting up ICET for 6502 debug.
Replies: 1
Views: 107

Setting up ICET for 6502 debug.

Hi all, I have a couple of the XC3S500 Godil boards one of which I'd like to use as a 6502 ICE as it might help with this damn apple interface I'm trying to get working. The problem is I have the version of the board with the 2x50 way female connectors on the bottom of the board. How should I go abo...
by Prime
Fri Oct 27, 2017 1:37 am
Forum: upcoming and recent events & exhibitions
Topic: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD
Replies: 133
Views: 4187

Re: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD

Right,

Hotel booked, anything anyone wants me to bring? Will prolly bring solder /desolder /scope, and I'll try and remember my monitor this time....

Cheers.

Phill.
by Prime
Thu Oct 05, 2017 3:48 pm
Forum: hardware
Topic: PS/2 to Master keyboard interface?
Replies: 22
Views: 544

Re: PS/2 to Master keyboard interface?

So there's two ways to do this. Prime got it working back in 2009 with a crosspoint switch , which is a chip which has a programmable matrix of connections (used for some analog operations, but happens to perfectly emulate a keyboard). That's probably the most safe/reliable way to do things, but th...
by Prime
Wed Sep 27, 2017 9:40 am
Forum: upcoming and recent events & exhibitions
Topic: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD
Replies: 133
Views: 4187

Re: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD

Right Paid up, I'll be there as normal Friday afternoon till Sunday afternoon. Might bring a Dragon & DragonMMC to show off as well as Acorn kit. Cheers. Phill. Hi Phill Are you bringing Dragon kits to sell. I want one :) Thanks Yeah can do, if you want one before then drop an email to : dragon...
by Prime
Mon Sep 25, 2017 8:26 am
Forum: upcoming and recent events & exhibitions
Topic: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD
Replies: 133
Views: 4187

Re: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD

Prime wrote:Right Paid up, I'll be there as normal Friday afternoon till Sunday afternoon.

Might bring a Dragon & (production) DragonMMC to show off as well as Acorn kit.

Cheers.

Phill.
by Prime
Mon Sep 25, 2017 8:26 am
Forum: upcoming and recent events & exhibitions
Topic: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD
Replies: 133
Views: 4187

Re: ABUG EAST MIDLANDS (Winter Warmer) 17-19 November 2017 (Leicestershire) BOOKING THREAD

Right Paid up, I'll be there as normal Friday afternoon till Sunday afternoon.

Might bring a Dragon & DragonMMC to show off as well as Acorn kit.

Cheers.

Phill.
by Prime
Tue Aug 29, 2017 9:49 am
Forum: acorn atom
Topic: Atoms ahoy on HACKADAY!
Replies: 9
Views: 391

Re: Atoms ahoy on HACKADAY!

If your AtoMMC code is still based on my AVR code, you could try upgrading the version of FATFS it uses, I upgraded DragonMMC to use 0.09 (I believe) and that seems to work fine with SDHC cards, must try it with a couple of SDXC cards before release (which is imminent).

Cheers.

Phill.
by Prime
Tue Aug 15, 2017 1:20 am
Forum: software: other
Topic: NIBL - an influence on Atom Basic??
Replies: 2
Views: 319

Re: NIBL - an influence on Atom Basic??

Doubt it implies any kind of heritage, but Oric BASIC (which was derived from MS BASIC) used '#' as a hex literal prefix too. Not sure if 'vanilla' MS BASIC had that. Dragon / CoCo basics which are MS basic use &H, I believe in some MS basics you could use &O for octal, but I may be fuzzy t...
by Prime
Mon Aug 07, 2017 2:03 pm
Forum: acorn atom
Topic: My new Atom greets me with nothing but P's
Replies: 20
Views: 1102

Re: My new Atom greets me with nothing but P's

- is the a 60 Hz signal on pin 10 of the 8255? If not, is there a 60Hz on pin 37 of the 6847? If yes then you have a bad track between those pins, if not, is there a 3.58MHz signal on pin 33 of the 6847? As he's getting a picture I would say the clock to the 6847 is OK, as there would be nothing at...

Go to advanced search