Recent posts

#1
Programming / Re: Catch vsync when interrupt...
Last post by martin464 - Today at 04:38
As an update to this, what Longshot says is true. 
I managed to get no interrupt to occur during a vsync by disabling interrupts randomly and enabling them
I wrote a crude piece of code to sync them back approximately, which I am guessing could occur if using firmware disk routines that disable them i thought, so it could happen
I don't know how the super precise rupture effects are able to handle this problem and use interrupts to position stuff!
all the code i see seems to use halts and then position but how when they can get misaligned. can we reset the counters ourselves? i bet that is what is happenning cause i feel like that would explain it if that was it 

Anyway, I got another question that's a bit different, 
Would it be possible to make the CRTC hide the left edge of the screen, like a wider left border, like this:
BORDER   HIDDEN    VISIBLE ....................... RIGHT BORDER
               C000         C002
and still have the visible part centralised, just hiding the first 2 bytes of every line?
if it uses a bit more screen ram is ok but not going to full 24k (or 20k) as in increasing crtc to 50 characters
i think it can't be done but maybe there is some way?!

Thanks guys, appreciated


#2
Amstrad CPC hardware / Re: CTM640 Monitor
Last post by RetroCPC - Today at 03:31
Prime suspect would be failing capacitors  resulting in high "Hum" levels on the 5V PSU output. Monitor requires a recap...
#3
Amstrad CPC hardware / CTM640 Monitor
Last post by remagorter - Yesterday at 23:05
I am getting interference on my CPC monitor in the form of an ever so slightly wavy screen. I have narrowed down the cause to the 5v power supply lead from the monitor to the CPC. But don't know how to fix this.

If I use an alternative 5v power source for my CPC the interference goes away.

Furthermore, I plugged the CPC into another CPC monitor but took the 5v power from the 'faulty' monitor and the problem moved to this other monitor.

So I concluded that drawing power from this 'faulty' monitor creates interference. 

Any idea what could be causing this?
#4
Emulators / Re: Z80 instructions - subset ...
Last post by Gryzor - Yesterday at 20:19
I'll need new glasses for that one. I can do a 0603 though -oh you said without messing it up? That's unfair. I'll give it a try when you fix the quotes query that randomly makes the CPU spike for a minute or so. 
#5
Emulators / Re: Z80 instructions - subset ...
Last post by Bryce - Yesterday at 19:52
Quote from: Gryzor on Yesterday at 19:48
Quote from: Bryce on Yesterday at 19:41
Quote from: Gryzor on Yesterday at 19:19I think you mean @Bryce  🙂

So we're not interchangeable?? :o

Bryce.

You do the hardware, I'll do the (messing up of) the forum database.

A small (evil) part of me wants to see you soldering an 0201 resistor without messing it up.

Bryce.
#6
Emulators / Re: Z80 instructions - subset ...
Last post by Gryzor - Yesterday at 19:49
Quote from: aidano on Yesterday at 19:43
Quote from: Gryzor on Yesterday at 19:19I think you mean @Bryce  🙂
Oops! Sorry for the summons!
No worries, I actually meant to read your thread and the quote notification prompted me to finally open it 🙂
#7
Emulators / Re: Z80 instructions - subset ...
Last post by Gryzor - Yesterday at 19:48
Quote from: Bryce on Yesterday at 19:41
Quote from: Gryzor on Yesterday at 19:19I think you mean @Bryce  🙂

So we're not interchangeable?? :o

Bryce.

You do the hardware, I'll do the (messing up of) the forum database. 
#8
Emulators / Re: Z80 instructions - subset ...
Last post by aidano - Yesterday at 19:43
Quote from: Gryzor on Yesterday at 19:19I think you mean @Bryce  🙂
Oops! Sorry for the summons!
#9
Emulators / Re: Z80 instructions - subset ...
Last post by Bryce - Yesterday at 19:41
Quote from: Gryzor on Yesterday at 19:19I think you mean @Bryce  🙂

So we're not interchangeable?? :o

Bryce.
#10
Emulators / Re: Z80 instructions - subset ...
Last post by Gryzor - Yesterday at 19:19
I think you mean @Bryce  🙂
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