Search found 158 matches

by bprosman
Fri Jun 15, 2018 1:07 pm
Forum: acorn atom
Topic: Atom 2k18 ?
Replies: 19
Views: 501

Re: Atom 2k18 ?

but whatever I try, it's always too big. Did you try rotating the chip 45 degrees ? Especially for Roland : special plice :-) https://nl.aliexpress.com/item/XC9572XL-15PCG44C-XC9572XL-15PC44C-XC9572-15PCG44C-XC9572-15PC44C-XC9572-XC9572XL-PLCC44-500pcs-lot-Free-Shipping/32803422554.html?spm=a2g0z.s...
by bprosman
Sun Jun 10, 2018 1:12 pm
Forum: acorn atom
Topic: Recovered ROM.
Replies: 1
Views: 152

Re: Recovered ROM.

Seem to be used to drive an ignition coil or something : REM------------------ REM OUTPUT ON PB7 REM------------------ DIM A(1) REM ARRAY POINTERS GOSUB 400 REM--ASSEMBLE P."" P."INPUT DURATION AND FREQUENCY"' P. "OF EACH SPARK"'' ( INPUT"NUMBER OF STEPS"S 2 IF S<1 GOTO 10 7 P.' < DIM TT(S),HH(S),GG...
by bprosman
Sun Jun 10, 2018 1:07 pm
Forum: acorn atom
Topic: Atom 2k18 ?
Replies: 19
Views: 501

Re: Atom 2k18 ?

Also the 44 pin VQFP XC95xxXL CPLDs are not that difficult to solder, and would have the advantage that the existing CPLD code could be re-used. Maybe it shows my age but personally also would not go the FPGA route. Would even consider bringing back the good old 6847. (but then you lack the color o...
by bprosman
Sun Jun 03, 2018 8:19 pm
Forum: hardware
Topic: Eprom access times
Replies: 1
Views: 105

Eprom access times

Does anyone know what the minimum access speed is for Eproms in a BBC-B and/or an Acorn Atom ?

Kinds regards, Bram
by bprosman
Sat Mar 24, 2018 7:20 pm
Forum: acorn atom
Topic: Acorn Atom newly acquired not resetting
Replies: 19
Views: 809

Re: Acorn Atom newly acquired not resetting

Lots of potential for loose connections and bad joints.
Indeed I see a lot of single sided IC sockets.
by bprosman
Tue Mar 06, 2018 9:06 pm
Forum: hardware
Topic: Z80 Monitor
Replies: 0
Views: 423

Z80 Monitor

Anyone aware of a nice re-usable Z80 monitor preferrably with a 8251 ?.
I have found this one, very nice piece of work but unfortunately not with source.
I'd like to re-asseblemble , tinker with it.
http://www.instructables.com/id/Z80-Mon ... m-and-SBC/
by bprosman
Thu Dec 28, 2017 3:23 pm
Forum: acorn atom
Topic: Happy Holidays! :)
Replies: 2
Views: 470

Re: Happy Holidays! :)

Happy holidays !!
by bprosman
Fri Dec 22, 2017 4:50 pm
Forum: acorn atom
Topic: ICE T65/Z80/6809
Replies: 634
Views: 42888

Re: ICE T65/Z80/6809

May welldesolder and replace with right angle ones.
Too bad the straight ones are out of pitch , so yes you more or less have to.
by bprosman
Thu Dec 21, 2017 7:05 am
Forum: acorn atom
Topic: ICE T65/Z80/6809
Replies: 634
Views: 42888

Re: ICE T65/Z80/6809

Got my 2nd EEPizza board in and it came with a straight single header row like the 1st one.
by bprosman
Sat Dec 02, 2017 9:00 am
Forum: acorn atom
Topic: ICE T65/Z80/6809
Replies: 634
Views: 42888

Re: ICE T65/Z80/6809

I ordered a 2nd one so curious what i get. My first one was the same as yours.

Regards, Bram
by bprosman
Wed Nov 01, 2017 8:37 am
Forum: hardware
Topic: Would anyone mind burning me a Starstick ROM?
Replies: 12
Views: 691

Re: Would anyone mind burning me a Starstick ROM?

Hi Commie_user,
If you (via PM) send me your postal address I will burn you one or two.
Has to come from NL though.

Regards, Bram
by bprosman
Wed Nov 01, 2017 6:59 am
Forum: hardware
Topic: Would anyone mind burning me a Starstick ROM?
Replies: 12
Views: 691

Re: Would anyone mind burning me a Starstick ROM?

What EPROM would it require ?
by bprosman
Tue Oct 31, 2017 7:54 am
Forum: acorn atom
Topic: Rare Acorn Atom 80 column board
Replies: 8
Views: 618

Re: Rare Acorn Atom 80 column board

Once mounted on a board the chips are not that sensitive anymore and think the Signetics chips are even NMOS.
by bprosman
Mon Oct 30, 2017 10:28 pm
Forum: acorn atom
Topic: Rare Acorn Atom 80 column board
Replies: 8
Views: 618

Re: Rare Acorn Atom 80 column board

Looks like built / designed by a former Philips employee.
Pricing is not funny anymore :-(
Still have a bunch of 2650 Processors lying around here NOS.
by bprosman
Sun Oct 29, 2017 9:23 am
Forum: off-topic
Topic: What is the average age on here??
Replies: 219
Views: 19762

Re: What is the average age on here??

52 here, (born in 1965) , bought my first atom as a kit in 1980. When the Dutch Acorn magazine was about 3 copied sheets and "cut and paste" meant scissors and glue :D
by bprosman
Sun Sep 24, 2017 3:30 pm
Forum: acorn atom
Topic: ICE T65/Z80/6809
Replies: 634
Views: 42888

Re: ICE T65/Z80/6809

Was just wondering, (and if I'm overlooking it, apologies but....) how hard it would be to Implement a sort of PoPi (PokePin) command, to set a certain output to 0, or to 1, this to test wiring and level shifters. PePi (PeekPin) could be its counterpart. Ideal would be the function name (e.g. PoPi A...
by bprosman
Sun Sep 24, 2017 12:01 pm
Forum: acorn atom
Topic: ICE T65/Z80/6809
Replies: 634
Views: 42888

Re: ICE T65/Z80/6809

Hi Dave, Not yet, going to do that, will finished the level shifters today. The Xilinx software and getting it too work was too addictive even though you provided compiled "ready to run" versions :D Was wondering the max lenght of a flatcable from the level shifters to the 6502 socket. Would one foo...
by bprosman
Sun Sep 24, 2017 9:22 am
Forum: acorn atom
Topic: ICE T65/Z80/6809
Replies: 634
Views: 42888

Re: ICE T65/Z80/6809

And where there :D :D :D
by bprosman
Sun Sep 24, 2017 7:33 am
Forum: acorn atom
Topic: ICE T65/Z80/6809
Replies: 634
Views: 42888

Re: ICE T65/Z80/6809

Hi,

Even though Dave provided the compiled burnable files I tried to run it myself in an Ubuntu VM.
But I run into this and cant find how to fix it (i have seen it in this trhreat before) :
Xilinx Error 001.JPG

//Edit SORRY GUYS,
The unset LD_LIBRARY_PATH did it.
by bprosman
Fri Sep 22, 2017 2:52 pm
Forum: acorn atom
Topic: Running ISE 14.7 on Windows 10
Replies: 4
Views: 548

Re: Running ISE 14.7 on Windows 10

Thanks dave, that did the trick :D
Just programmed my first "Barrel shift" program and it works :D

Now the next step, your ICE-T
by bprosman
Fri Sep 22, 2017 1:20 pm
Forum: acorn atom
Topic: Running ISE 14.7 on Windows 10
Replies: 4
Views: 548

Re: Running ISE 14.7 on Windows 10

To avoid hijacking Hoglets T65 topic I continue here. As mentioned earlier, I am very new to programmable logic so apologies for the "Stupid questions" . I got my Xilinx XC6SLX9 Mini Board from EEPIZZA. When i connect it to USB I see its working. The leds nicely PWM 4 by 4. When I start ISE 14.7, oa...
by bprosman
Sun Sep 17, 2017 8:06 pm
Forum: other vintage computer hardware, software and games
Topic: SDK 85
Replies: 9
Views: 977

Re: SDK 85

Futurlec even still stocks most of the components.
by bprosman
Sun Sep 17, 2017 7:13 pm
Forum: other vintage computer hardware, software and games
Topic: SDK 85
Replies: 9
Views: 977

Re: SDK 85

Lovely piece.
by bprosman
Thu Sep 14, 2017 6:25 pm
Forum: acorn atom
Topic: Martin's Acorn Atom (keyboard)
Replies: 27
Views: 4881

Re: Martin's Acorn Atom (keyboard)

Smelly parts :D
by bprosman
Tue Sep 12, 2017 7:26 pm
Forum: hardware
Topic: Desoldering components
Replies: 10
Views: 1068

Re: Desoldering components

With this one I stripped 2 Acorn Atoms to the bare bone (PCB) :

http://www.aoyue.com/en/pro/default.asp?id=345

Regards, Bram
by bprosman
Tue Sep 12, 2017 6:32 pm
Forum: acorn atom
Topic: ICE T65/Z80/6809
Replies: 634
Views: 42888

Re: ICE T65/Z80/6809

If you dont work with a Godil (kind of costruction) but with seperate level shifters and you want to build the ICE like in the picture, how long you all think the max length of the flatcable could be ?
Signum-Systems-USP-51-8051-In-Circuit-Emulator-ICE-USP-51A.jpg
by bprosman
Mon Sep 11, 2017 10:08 am
Forum: acorn atom
Topic: ICE T65/Z80/6809
Replies: 634
Views: 42888

Re: ICE T65/Z80/6809

Received these over the weekend. Let's see whether these can work.
Level Shifter 1.jpg
Level Shifter 2.jpg
txb0108.pdf
(1.3 MiB) Downloaded 26 times
Regards, Bram
by bprosman
Sun Sep 10, 2017 11:29 am
Forum: acorn atom
Topic: Programming 2532s
Replies: 13
Views: 1161

Re: Programming 2532s

Make sure you put the programming voltage on 21V in case of a 2532A.
by bprosman
Mon Sep 04, 2017 12:21 pm
Forum: acorn atom
Topic: Running ISE 14.7 on Windows 10
Replies: 4
Views: 548

Running ISE 14.7 on Windows 10

As I am going to play with Roland's YARRB and Atom2015 (and some homebrew stuff) I was installing Xilinx 14.7 ISE on Windows 10 - 64 Bit. Installing went smooth, unfortunately I only got the 32-Bit version to work. Some Googling brought me to : http://www.eevblog.com/forum/microcontrollers/guide-get...