[2019-03-18 19:50:43 CET] * Guest145 joined
[2019-03-18 19:54:42 CET] * Guest145 quit (CGI:IRC (EOF))
[2019-03-23 14:30:37 CET] * heinz joined
[2019-03-23 15:03:15 CET] * heinz quit (EOT)
[2019-03-24 19:51:17 CET] * rune joined
[2019-03-24 20:00:12 CET] * heinz joined
[2019-03-24 20:00:20 CET] <heinz> hello dave
[2019-03-24 20:00:42 CET] <heinz> nice video.
[2019-03-24 20:00:44 CET] <rune> hello Heinz
[2019-03-24 20:00:55 CET] <rune> just ordered a stepper motor and control board
[2019-03-24 20:01:16 CET] <heinz> such a small one for 5 eur?
[2019-03-24 20:01:31 CET] <rune> Yes, I think 3.40
[2019-03-24 20:01:42 CET] <heinz> have fun.
[2019-03-24 20:01:48 CET] <rune> From London so not a long wait
[2019-03-24 20:02:13 CET] <rune> I also found 3d print to use CD Drive motor for linear movement
[2019-03-24 20:02:26 CET] <heinz> did you try the h4th pio program?
[2019-03-24 20:02:43 CET] <rune> I wrote almost the exact same one as you
[2019-03-24 20:02:47 CET] <rune> Yes it works well
[2019-03-24 20:03:02 CET] <heinz> much easier than in basic.
[2019-03-24 20:03:17 CET] <rune> Yes, Im becoming a fan of CODE ;C
[2019-03-24 20:03:33 CET] <heinz> was i cear enough with explanation of the addresses?
[2019-03-24 20:03:40 CET] <heinz> clear
[2019-03-24 20:03:42 CET] <rune> Yes, perfect
[2019-03-24 20:03:50 CET] <rune> How do you read IN
[2019-03-24 20:04:02 CET] <rune> 5V on one of the data lines?
[2019-03-24 20:04:26 CET] <rune> I gues if only one data line it would be a PULSE
[2019-03-24 20:04:42 CET] <heinz> you have to send first another control byte to the control port.
[2019-03-24 20:05:01 CET] <rune> Yes that 47 4F I think depends on port
[2019-03-24 20:05:03 CET] <heinz> dont remember which one.
[2019-03-24 20:05:18 CET] <heinz> you might be right.
[2019-03-24 20:05:38 CET] <rune> What I am not clear is how signal goes on Data lines/GND
[2019-03-24 20:05:59 CET] <heinz> ??
[2019-03-24 20:06:24 CET] <rune> Well the data has got to be presented at the port somehow
[2019-03-24 20:06:43 CET] <rune> If its on a single line it could be a PULSE.
[2019-03-24 20:07:12 CET] <heinz> do you read about output or input?
[2019-03-24 20:07:16 CET] <rune> But if its in CAD you need to know position so possibly all 8 data lines will have signal or not
[2019-03-24 20:07:18 CET] <heinz> talk
[2019-03-24 20:07:33 CET] <rune> Input (output is fine)
[2019-03-24 20:07:59 CET] <heinz> let me first have a look into the manuaal
[2019-03-24 20:08:13 CET] <rune> Its in the manual?
[2019-03-24 20:08:31 CET] <heinz> page 13
[2019-03-24 20:09:27 CET] <rune> OK I will have a look
[2019-03-24 20:09:33 CET] <heinz> no, page 10.
[2019-03-24 20:10:05 CET] <rune> I only have 7 pages in my manual. Are you talking about the Intel PIO manual
[2019-03-24 20:10:15 CET] <heinz> mode 1 : control byte is 1f
[2019-03-24 20:10:31 CET] <heinz> not the intel pio.
[2019-03-24 20:10:35 CET] <heinz> z80 pio
[2019-03-24 20:10:49 CET] <rune> OK, I think I got that
[2019-03-24 20:10:52 CET] <heinz> i have send the reference in the forum
[2019-03-24 20:11:35 CET] <heinz> did you find it?
[2019-03-24 20:11:47 CET] <heinz> 22 pages long
[2019-03-24 20:11:50 CET] <rune> Yes, I was trying to use Joachins manual
[2019-03-24 20:12:06 CET] <heinz> i dont know joachims m.
[2019-03-24 20:12:12 CET] <rune> Found it there too. I think. need to translate 
[2019-03-24 20:12:19 CET] <rune> I'll send it
[2019-03-24 20:12:28 CET] <heinz> use the other manual.
[2019-03-24 20:12:43 CET] <heinz> www.z80.info/...
[2019-03-24 20:13:00 CET] <rune> OK
[2019-03-24 20:13:11 CET] <heinz> page 10?
[2019-03-24 20:13:21 CET] <rune> Yes, got that
[2019-03-24 20:13:58 CET] <heinz> output: 0001 1111 = 1f
[2019-03-24 20:14:02 CET] <heinz> ok?
[2019-03-24 20:14:12 CET] <heinz> sorry, input.
[2019-03-24 20:14:25 CET] <rune> But my question was what sort of signal will mean a 1 on the data line?
[2019-03-24 20:14:34 CET] <heinz> i see.
[2019-03-24 20:14:37 CET] <rune> 5V? 3V ???
[2019-03-24 20:14:50 CET] <heinz> of course +5v = high
[2019-03-24 20:14:56 CET] <heinz> 0 = low
[2019-03-24 20:15:11 CET] <heinz> old technology
[2019-03-24 20:15:14 CET] <rune> Is there a maximum current  
[2019-03-24 20:15:20 CET] <heinz> 1982
[2019-03-24 20:15:42 CET] <heinz> current take from the data sheet.
[2019-03-24 20:15:56 CET] <rune> Thats modern for zeddy
[2019-03-24 20:16:01 CET] <rune> cutting edge stuff
[2019-03-24 20:16:18 CET] <heinz> for input almost no current, output i would say no more than 5 ma
[2019-03-24 20:16:37 CET] <heinz> milli ampere.
[2019-03-24 20:16:59 CET] <heinz> your resistors have 500 ohm.
[2019-03-24 20:17:07 CET] <rune> Yes
[2019-03-24 20:17:10 CET] <heinz> this means 10 milli ampere
[2019-03-24 20:17:41 CET] <rune> OH, I saw Joachins resistors were 470 so thought Id be OK
[2019-03-24 20:18:07 CET] <heinz> the driver for your step motoor takes atmost 1 milli a.pere
[2019-03-24 20:18:39 CET] <heinz> with 470 the leds shine brighter
[2019-03-24 20:18:52 CET] <rune> More curent
[2019-03-24 20:19:03 CET] <heinz> but 8 leds with 10 ma each means 80 ma.
[2019-03-24 20:19:37 CET] <heinz> almost 100 ma , with 5v this means 500 milli watt.
[2019-03-24 20:19:48 CET] <heinz> upper limit i would say.
[2019-03-24 20:20:01 CET] <heinz> but look into the data sheet.
[2019-03-24 20:20:09 CET] <rune> If I used 2K resistors Id pull 25 ma ?
[2019-03-24 20:20:10 CET] <heinz> of the z80 pio
[2019-03-24 20:20:28 CET] <heinz> 2.5 ma
[2019-03-24 20:20:52 CET] <heinz> but the led is quite dark.
[2019-03-24 20:21:51 CET] <heinz> do you want to have one of joachims monitors?
[2019-03-24 20:21:59 CET] <heinz> led monitors?
[2019-03-24 20:22:30 CET] <rune> Do you mean the boards with SMD resistors and LEDs
[2019-03-24 20:22:36 CET] <heinz> yes.
[2019-03-24 20:22:41 CET] <rune> No I dont have
[2019-03-24 20:22:45 CET] <heinz> ok.
[2019-03-24 20:23:20 CET] <rune> Im just getting this together. 
[2019-03-24 20:23:43 CET] <rune> Next step is stepping motor
[2019-03-24 20:23:45 CET] <heinz> your colored leds look nice in the video.
[2019-03-24 20:24:22 CET] <rune> Yes, they are out of the scrap box. I ordered 200 different coloured ones
[2019-03-24 20:24:42 CET] <rune> They are a bit too wide for the board spacing though
[2019-03-24 20:25:07 CET] <rune> I should have put every second one forward
[2019-03-24 20:26:02 CET] <heinz> i have opened the data sheet for z80 pio.
[2019-03-24 20:26:27 CET] <heinz> please, do the same.
[2019-03-24 20:26:57 CET] <rune> is that the 22 page doc?
[2019-03-24 20:27:17 CET] <rune> It says user manual
[2019-03-24 20:27:21 CET] <heinz> they write on page 14: current smaller than 3.8 ma.
[2019-03-24 20:27:33 CET] <heinz> no, different doc.
[2019-03-24 20:28:05 CET] <rune> think I have it, web is slow
[2019-03-24 20:28:09 CET] <heinz> www.datasheetcatalog.net
[2019-03-24 20:28:27 CET] <heinz> then z80 pio
[2019-03-24 20:28:38 CET] <heinz> foun\?
[2019-03-24 20:28:43 CET] <heinz> found?
[2019-03-24 20:29:03 CET] <rune> no - its user manual
[2019-03-24 20:29:17 CET] <heinz> or z8420 
[2019-03-24 20:29:29 CET] <rune> Its taking ages to open
[2019-03-24 20:29:37 CET] <heinz> www.datasheetcatalog.net
[2019-03-24 20:31:57 CET] <heinz> then try www.datasheetcatalog.net/de/
[2019-03-24 20:31:58 CET] <rune> Its trying to open
[2019-03-24 20:31:58 CET] <rune> Im there
[2019-03-24 20:32:46 CET] <rune> Am I looking at DC characteristics
[2019-03-24 20:32:48 CET] <heinz> did you open it?
[2019-03-24 20:32:54 CET] <rune> Yes
[2019-03-24 20:33:01 CET] <heinz> at the very end
[2019-03-24 20:33:19 CET] <heinz> darlington drive current
[2019-03-24 20:33:50 CET] <rune> Page? I dont see that
[2019-03-24 20:34:26 CET] <heinz> which sheet did you open? zilog? |! micro?
[2019-03-24 20:34:41 CET] <heinz> st microelectr
[2019-03-24 20:34:48 CET] <rune> Zilog, its an image so cant search
[2019-03-24 20:34:59 CET] <heinz> one moment.
[2019-03-24 20:35:11 CET] <heinz> i will open that.
[2019-03-24 20:35:41 CET] <heinz> dc characteristics
[2019-03-24 20:36:00 CET] <heinz> rext 390 ohm.
[2019-03-24 20:36:01 CET] <rune> GOT IT
[2019-03-24 20:36:27 CET] <heinz> 5v/ 390 ohm = 3.8 ma
[2019-03-24 20:36:51 CET] <heinz> no, 12 ma.
[2019-03-24 20:36:55 CET] <rune> thats the maximum? So divide by 8 for each data line.
[2019-03-24 20:37:10 CET] <heinz> no, i think for each.
[2019-03-24 20:37:24 CET] <rune> OK, so 510 ohm is OK
[2019-03-24 20:37:45 CET] <heinz> the st microelectronic document is better to read
[2019-03-24 20:38:10 CET] <rune> I'll get it later, the web connection is slow in google tonight
[2019-03-24 20:38:13 CET] <heinz> your question for "high"
[2019-03-24 20:38:34 CET] <heinz> in between 2v and 5v is high.
[2019-03-24 20:38:54 CET] <heinz> low: not bigger than 0.8v
[2019-03-24 20:39:09 CET] <rune> OK, Could I test by joining the 5v to a data line
[2019-03-24 20:39:25 CET] <heinz> for input?
[2019-03-24 20:39:29 CET] <rune> yes
[2019-03-24 20:39:44 CET] <rune> Bottom row has 8 data GND and 5V
[2019-03-24 20:39:47 CET] <heinz> put a 1k resistor in line for security.
[2019-03-24 20:39:53 CET] <rune> OK
[2019-03-24 20:40:05 CET] <heinz> then it will work.
[2019-03-24 20:40:32 CET] <heinz> there is also a bidirectional mode
[2019-03-24 20:40:35 CET] <rune> I'll mak a cable tomorrow and test
[2019-03-24 20:40:41 CET] <rune> Mode 3?
[2019-03-24 20:40:49 CET] <heinz> mode 2, see page 10 .
[2019-03-24 20:40:55 CET] <heinz> old doc
[2019-03-24 20:41:03 CET] <heinz> z80.info
[2019-03-24 20:41:11 CET] <rune> OK
[2019-03-24 20:41:51 CET] <heinz> also interrupt vectors are possible.
[2019-03-24 20:42:01 CET] <heinz> but i never used that.
[2019-03-24 20:42:24 CET] <rune> Port A is data and B control
[2019-03-24 20:43:15 CET] <heinz> no, two equal ports.
[2019-03-24 20:43:25 CET] <heinz> altogether 16 bits.
[2019-03-24 20:43:41 CET] <heinz> in each mode.
[2019-03-24 20:43:55 CET] <rune> Page 14 mode 2?
[2019-03-24 20:44:13 CET] <heinz> do you have a document still open?
[2019-03-24 20:44:17 CET] <rune> Yes
[2019-03-24 20:44:27 CET] <heinz> which one?
[2019-03-24 20:44:33 CET] <rune> User manual
[2019-03-24 20:44:33 CET] <heinz> zilog?
[2019-03-24 20:44:48 CET] <rune> Z80PIOMn.pdf
[2019-03-24 20:45:09 CET] <heinz> page 10, first lines.
[2019-03-24 20:45:56 CET] <rune> Yep, says port b cannot operate in Bi-directional mode
[2019-03-24 20:45:58 CET] <heinz> these are some differences with the 855 chip.
[2019-03-24 20:46:23 CET] <rune> But that way ahead of where I am just now
[2019-03-24 20:47:14 CET] <heinz> you have used it only for output.
[2019-03-24 20:47:28 CET] <heinz> mode 0.
[2019-03-24 20:47:30 CET] <rune> Yes, little steps
[2019-03-24 20:47:45 CET] <heinz> ok.
[2019-03-24 20:47:47 CET] <rune> Otherwise I burn something out or blow it up
[2019-03-24 20:48:07 CET] <heinz> let us stop for today. read the manual carefully.
[2019-03-24 20:48:16 CET] <rune> I will, thanks for advice
[2019-03-24 20:48:23 CET] <rune> talk in two weeks?
[2019-03-24 20:48:26 CET] <heinz> have a nice week.
[2019-03-24 20:48:37 CET] <rune> you too. safe drive to Mahlerts
[2019-03-24 20:48:42 CET] <rune> bye
[2019-03-24 20:48:46 CET] <heinz> 2 week.
[2019-03-24 20:48:51 CET] <heinz> bye
[2019-03-24 20:48:53 CET] * heinz quit (EOT)
[2019-03-24 20:48:55 CET] * rune quit (Leaving)