Comparing Sinclair QL to Commodore 64

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Derek_Stewart
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Re: Comparing Sinclair QL to Commodore 64

Postby Derek_Stewart » Fri Mar 27, 2020 8:13 pm

Hi,

I always wondered about the Atari SMSQ/E implementation, as the QVME Card had hardware support in the operating system. But not the Atari custom chips.

I suppose this the problem with the way Tony Tebby dictated the way SMSQ/E should be written. He could not do everything. There really should been a team of programmers.

Does anyone still use an Atari for QL emulation?


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Derek
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Peter
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Re: Comparing Sinclair QL to Commodore 64

Postby Peter » Fri Mar 27, 2020 11:15 pm

Derek_Stewart wrote:I always wondered about the Atari SMSQ/E implementation, as the QVME Card had hardware support in the operating system. But not the Atari custom chips.
I suppose this the problem with the way Tony Tebby dictated the way SMSQ/E should be written. He could not do everything. There really should been a team of programmers.


The SMSQ/E screen driver structure makes them hard to implement for a different screen layout. So I guess it was easier to go for a hardware solution.


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Re: Comparing Sinclair QL to Commodore 64

Postby Derek_Stewart » Sat Mar 28, 2020 8:49 am

RalfR wrote:
pjw wrote:Imagine SMSQ/E fully incarnated into the Amiga hardware! Mmm.
Should be possible, It works on the Atari (native WIN, native screen).

HI Per,

What sort of Amiga?

Also bear in mind, that a Raspberry PI with Amiga emulator, out performs all Amiga hardware. So how about a SMSQ/E implementation on the Raspberry PI?


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Derek
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RalfR
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Re: Comparing Sinclair QL to Commodore 64

Postby RalfR » Sat Mar 28, 2020 9:53 am

Derek_Stewart wrote:Also bear in mind, that a Raspberry PI with Amiga emulator, out performs all Amiga hardware. So how about a SMSQ/E implementation on the Raspberry PI?
You mean a native implentation, do you?

Yes, but you are not able to connect any monitor with VGA or DVI (as far as I know just HDMI or analog) to the PI.


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NormanDunbar
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Re: Comparing Sinclair QL to Commodore 64

Postby NormanDunbar » Sat Mar 28, 2020 10:09 am

Hi Ralf,

the Pi has HDMI and composite out for video. I have a Pi connected through an active HDMI -> VGA adaptor to use my (very old) Dell monitor with it. No sound on VGA though, unlike HDMI.

This cable is used to get composite video and sound onto a non-HDMI TV: https://thepihut.com/products/av-compos ... 3-x-rca-3m.

HTH

Cheers,
Norm.


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RalfR
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Re: Comparing Sinclair QL to Commodore 64

Postby RalfR » Sat Mar 28, 2020 10:12 am

Ah, thanks Norm, good to know. What's about a HDMI to DVI adapter, the quality is much better with DVI?


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Pr0f
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Re: Comparing Sinclair QL to Commodore 64

Postby Pr0f » Sat Mar 28, 2020 11:32 am

The video part of HDMI is electronically equivalent to DVI - so the adaptors do little more than route the appropriate pairs of video signals to the equivalent DVI pins.

DVI has no sound though.


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RalfR
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Re: Comparing Sinclair QL to Commodore 64

Postby RalfR » Sat Mar 28, 2020 11:35 am

Pr0f wrote:The video part of HDMI is electronically equivalent to DVI - so the adaptors do little more than route the appropriate pairs of video signals to the equivalent DVI pins.

DVI has no sound though.
Thank you, good to know. Sound comes here with the speakers... :D


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Pr0f
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Re: Comparing Sinclair QL to Commodore 64

Postby Pr0f » Sat Mar 28, 2020 11:42 am

There is one thing to note with DVI interface :

The DVI interface connector offers both DVI-D and DVI-A formats - one is digital the other analog. Clearly these are NOT interchangeable - so worth checking what your monitor actually uses.

DVI connector also has the capability to host 2 digital video interfaces - so you can get splitter cables that split off each output to it's own video connector.


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RalfR
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Re: Comparing Sinclair QL to Commodore 64

Postby RalfR » Sat Mar 28, 2020 12:00 pm

Thanks again for clarifying this, My DELL monitor is digital. But that does not seem to be the main intention of Derek. As far as I know, there is just SMSQ/E via uQLx under PI. So we may need a native 68000 emulator for it (I am perhaps wrong...(as always...) ;) )



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