Search found 70 matches

by mcleod_ideafix
Wed May 23, 2018 11:21 pm
Forum: News
Topic: Kickstarter update #31
Replies: 2
Views: 1632

Re: Kickstarter update #31

We’re facing the same challenge: we can’t add more connectors to the keyboard (or the Next board wouldn’t be compatible with the original Speccy keyboard), thus three layers it is, just like the Plus and 128. Actually, you CAN, and the connector can still be compatible with existing 8+5 keyboard co...
by mcleod_ideafix
Sun Mar 04, 2018 12:54 am
Forum: General
Topic: programming the FPGA
Replies: 7
Views: 2393

Re: programming the FPGA

Is there a way to look into the code that runs on the FPGA and is there a Linux based FPGA SDK that i could use? The "code" is not actually code (it's not machine code, or assembler, although you can use a regular high level programming language as one of the steps required to generate this "code")...
by mcleod_ideafix
Mon Feb 19, 2018 5:53 pm
Forum: ZX Spectrum Next
Topic: PS/2 Keyboard Performance
Replies: 15
Views: 2948

Re: PS/2 Keyboard Performance

I have to say I'm surprised to find this is an issue. I use a PS/2 keyboard with my issue 2A Next, and it has no problems keeping up with me no matter how fast I type. As a test I've just tried hammering away at W & E alternately as fast as I physically could and there were no missed characters. Al...
by mcleod_ideafix
Mon Feb 19, 2018 11:04 am
Forum: ZX Spectrum Next
Topic: PS/2 Keyboard Performance
Replies: 15
Views: 2948

Re: PS/2 Keyboard Performance

Hey mcleod_ideafix, Thank you for this. The test showed that the PS/2 keyboard is not an issue at all. So, is the new handler something that could be incorporated into the Next as standard? That's a question for Garry Lancaster. I guess the main issue would be backwards compatibility with software ...
by mcleod_ideafix
Sun Feb 18, 2018 11:33 pm
Forum: ZX Spectrum Next
Topic: PS/2 Keyboard Performance
Replies: 15
Views: 2948

Re: PS/2 Keyboard Performance

Just out of interest I tried this file and it does improve the typing experience on the Spectrum - well done. With the standard handler (yellow) on double letters like "beep" do not work at all which do work on the basic NextOS so that may be an artefact of your code. Yes, I've just spotted it. It'...
by mcleod_ideafix
Sun Feb 18, 2018 8:23 pm
Forum: ZX Spectrum Next
Topic: PS/2 Keyboard Performance
Replies: 15
Views: 2948

Re: PS/2 Keyboard Performance

I don't think your board or your PS/2 keyboard have issues. I don't know if Garry Lancaster has changed the way the keyboard is handled, but in the standard ROM, the keyboard management is... well... is complete rubbish. The keyboard handler is not suited for fast typing at all. This may have sense ...
by mcleod_ideafix
Tue Feb 13, 2018 3:58 pm
Forum: ZX Spectrum Next
Topic: Specdrum
Replies: 13
Views: 4720

Re: Specdrum

mitja_i wrote:
Tue Feb 13, 2018 2:12 pm
Where did you get them and how did you fix it?
Where: at the ZX-UNO repository, /software/specdrum. It's the Z80 files you can see there.
How: by disassembling the player code and NOPing out the machine code instructions that made up the "tick" noise.
by mcleod_ideafix
Wed Jan 31, 2018 3:09 pm
Forum: ZX Spectrum Next
Topic: Strange issues with 50/60Hz and the boot editor
Replies: 33
Views: 5067

Re: Strange issues with 50/60Hz and the boot editor

I go insane. Brand new class 10 16GB SanDisk SD card: No change at all! FW error at cold boot still present, refresh rate set to 60Hz, although config.ini file is correct... May be that you are editing the file on Linux or Mac? The .INI file seems to be a DOS file, so it should be safer to edit it ...
by mcleod_ideafix
Wed Jan 31, 2018 2:21 pm
Forum: Off-Topic
Topic: Banned from FB
Replies: 6
Views: 1853

Re: Banned from FB

I've been banned from the Next FB group too, and nobody gave me an explanation too.
by mcleod_ideafix
Sat Dec 09, 2017 9:04 pm
Forum: ZX Spectrum Next
Topic: Is safe to connect 5V interfaces to edge connector?
Replies: 23
Views: 3148

Re: Is safe to connect 5V interfaces to edge connector?

cignale wrote:
Sat Dec 09, 2017 5:44 pm
So, even an only resistor driven solution (the cited above by you), could be absolutely safe, right ?
No. Voltage dividers need two resistors per signal, and they cannot be used in a bidirectional environment. What I saw in the board was ONE resistor per signal. That is not a voltage divider.