Search found 643 matches

by iss
Sat Sep 15, 2018 9:02 pm
Forum: Technical questions
Topic: Merging video output?
Replies: 86
Views: 21974

Re: Merging video output?

Thanks, mikeb, your math is correct :).
I only mean the simplest case - without any additional resistors, simply short connected R, G and B outputs on SK2.
BTW, can you do the R-values math for 4 Oric's? :roll:
by iss
Sat Sep 15, 2018 4:26 pm
Forum: Technical questions
Topic: Merging video output?
Replies: 86
Views: 21974

Re: Merging video output?

There is one small detail related to the direct video mixing - RGB outputs are not TTL levels but the signal goes through resistors 200 Ohms. The result is absolutely similar to the internal audio channel mixing discussed in Oric's 8912 volume scale.
But this actually will lead to nice effects :).
by iss
Sat Sep 15, 2018 10:31 am
Forum: Hardware hacks and extensions
Topic: VIA "networking"
Replies: 11
Views: 211

Re: VIA "networking"

The only important thing about that, is that we want the hardware VSYNC to work Good point! Count it as DONE! Else, possible patches are: - set the NMI vector to CLOAD routine - we will have manual control too for every Slave. - change JMP to 'CLOAD' instead of print 'Ready' ... some many things to...
by iss
Sat Sep 15, 2018 10:02 am
Forum: Hardware hacks and extensions
Topic: VIA "networking"
Replies: 11
Views: 211

Re: VIA "networking"

This is one possible solution which I can do in "no-time" :). D0,D1,D2 are lines from Master printer port and together with STB (not shown on sketch) will route Master's Tape-Out to particular Slave's Tape-In. Bonus is that we can send data to one, two or to all three Slaves :). Additionally tape co...
by iss
Fri Sep 14, 2018 7:38 pm
Forum: Hardware hacks and extensions
Topic: VIA "networking"
Replies: 11
Views: 211

Re: VIA "networking"

I have exactly the same in my mind! I planed to connect the 4 Orics printer ports with simple ribbon cable, of course STB and ACK wires should be crossed. Interesting is how the master will talk to any particular slave #1,#2 or #3. IMO this can be done fully in software using kind of packet protocol...
by iss
Fri Sep 14, 2018 1:49 pm
Forum: Cross development tools
Topic: Taptap v2018 : bug fixes, improvements
Replies: 9
Views: 220

Re: Taptap v2018 : bug fixes, improvements

Well done! :) Compiled from sources without problems and it works! $ ./taptap cat $HOME/tapes/Aigle.tap Catalog of "Aigle.tap" Index.... : 0 Name............ : AIGLEDOR.1 File kind....... : BASIC Auto............ : Yes byte 9.......... : #00 Starting Address : #0501 Ending Address : #3F37 Size of da...
by iss
Thu Sep 13, 2018 7:11 pm
Forum: Technical questions
Topic: Merging video output?
Replies: 86
Views: 21974

Re: Merging video output?

I don't want to interrupt discussion but just to share that after I created real button de-bouncer now synchronization is simple and works fine! Let's make some final decisions related to the design of the future needed hardware: 1. How many Orics we need ? In my opinion 4 is OK! I'm asking because ...
by iss
Thu Sep 13, 2018 5:42 pm
Forum: General Discussion
Topic: California Devices Inc and the HCS10017
Replies: 31
Views: 1932

Re: California Devices Inc and the HCS10017

I am so annoyed at myself for not seeing that. Now me too :) - actually you answered to my Q2 too - excluding ULA from the suspects, taking the words "inherent design feature" from the book literally and looking at the PCB the anser is obvious: there is no decoupling capacitor for IC18 :D That's it...
by iss
Wed Sep 12, 2018 8:01 pm
Forum: Technical questions
Topic: Merging video output?
Replies: 86
Views: 21974

Re: Merging video output?

Done! It work always now!
Replaced button with Arduino (to avoid ringing) and following particular power-on sequence Orics start synchronized. :twisted:
I will post more samples with color mixing asap.

Start to think about a clever color mixing - I don't have very creative ideas...
by iss
Wed Sep 12, 2018 7:23 pm
Forum: Technical questions
Topic: Merging video output?
Replies: 86
Views: 21974

Re: Merging video output?

... and to summarize although it's possible to control ULA counters, it's not enough for stable work (with more than 2 Orics it will be nightmare). I think the best is to have a way to be able to drop single pulse from the 12MHz clock. Any other ideas? My next step is create new ROM with vertical an...
by iss
Wed Sep 12, 2018 7:16 pm
Forum: Technical questions
Topic: Merging video output?
Replies: 86
Views: 21974

Re: Merging video output?

Well, thanks to the recent great work of Mike Brown on ULA documenting we can move on! :) Important : All information about the undocumented feature of ULA's pin19 - Red video line is confirmed and working exactly as in the MJB Documentation/Schematics ! Here is the new simple schematic I've created...
by iss
Wed Sep 12, 2018 3:16 pm
Forum: Cross development tools
Topic: Taptap v2018 : bug fixes, improvements
Replies: 9
Views: 220

Re: Taptap v2018 : bug fixes, improvements

Great! I like it. Here is one quick solution for GetCiommandLine: function GetCommandLine : pchar; {$ifdef win32} stdcall;external KernelDLL name 'GetCommandLineA'; {$else} var I: Integer; S: String; begin S := ''; for I := 1 to ParamCount do S := S + ParamStr(I); GetCommandLine := ^S; end; {$endif}...
by iss
Wed Sep 12, 2018 2:56 pm
Forum: General Discussion
Topic: California Devices Inc and the HCS10017
Replies: 31
Views: 1932

Re: California Devices Inc and the HCS10017

Absolutely incredible work! Thank you all Mike Brown, Mike Connors/Datel and dreamseal. In our Oric are hidden lot of secrets but 2 questions related to ULA puzzled me for years and I lost hope to found the right answers... Q1: Why they connect ONLY the Blue (actually the Red ) video line with R26 (...
by iss
Wed Sep 12, 2018 10:35 am
Forum: Cross development tools
Topic: Taptap v2018 : bug fixes, improvements
Replies: 9
Views: 220

Re: Taptap v2018 : bug fixes, improvements

Cool and very useful tool, thanks! I tried to compile it for Linux with Lazarus but build failed. After some hacking it seams promising (need to find replacement for TDirectory, TPath ...). But I wonder if it will be better to rewrite it again :mrgreen: in C for portability and add the sources to OS...
by iss
Sun Sep 09, 2018 9:16 am
Forum: Mags and books
Topic: Downloadable old magazines
Replies: 14
Views: 6021

Re: Downloadable old magazines

21 OUM issues can be downloaded from oric.org (accessible without subscription).

BTW, clicking on any cover page opens always OricOwner_01.pdf...