Search found 301 matches

by Peter
Wed Jul 05, 2017 8:19 am
Forum: Hardware
Topic: RE: brand new Sinclair QL
Replies: 4
Views: 440

Re: RE: brand new Sinclair QL

Dave wrote:In HD, 2 bytes per pixel, you're looking at 162MB for just the screen.

How have you calculated that?

For me 3840 pixels × 2160 lines = 8.3 megapixels = 16 MB
by Peter
Mon Jul 03, 2017 9:45 pm
Forum: Hardware
Topic: RE: Q60
Replies: 5
Views: 351

Re: RE: Q60

Minimalistic, but still modern hardware. Performance-wise, however, it's probably closer to a high-end QL with SGC than a Q60. I might add that code execution speed of the Q68 is about 3 to 4 times higher if run from internal RAM, so this is not a CPU issue but the lack of cache when accessing SDRA...
by Peter
Mon Jul 03, 2017 9:20 pm
Forum: Hardware
Topic: RE: Q60
Replies: 5
Views: 351

Re: RE: Q60

What I still consider to design (time permitting) is sort of an intelligent slot riser card for Q60, which allows to mount it into a compact case and add SDHC card support. Also I would like to work on a solution for modern widescreen monitors. If such improvents can be finished, it could make a sma...
by Peter
Mon Jul 03, 2017 9:05 am
Forum: Hardware
Topic: What features matter to you?
Replies: 18
Views: 1248

Re: What features matter to you?

No, I used the last debatable pin for QL NET. So extra electronics, maybe a little microcontroller, would be needed. I²C could be used, probably most suitable. Or if one of the two SDHC slots is sacrificed, SPI. Even feeding into SER or PS/2 could make sense. Note 1: At the moment Q68 can only be I²...
by Peter
Sun Jul 02, 2017 9:36 pm
Forum: Hardware
Topic: What features matter to you?
Replies: 18
Views: 1248

Re: What features matter to you?

I'm suprised so many would omit microdrives inside the original QL. Then it seems most wishes would be fulfilled with a board to read the QL keyboard plus the Q68 inside the case (it fits physically).
by Peter
Sun Jul 02, 2017 9:17 pm
Forum: Hardware
Topic: What features matter to you?
Replies: 18
Views: 1248

Re: What features matter to you?

... what you want, exactly, already exist, but it is completely ignored... the answer is MIST : Wireless USB keyboard, HDMI, Ethernet, SD , FPGA , faster CPU, Minerva loaded...and it is cheap, it exist, you can buy it, it is not a prototype , last but not least ...a switch on/off button exist. Do w...
by Peter
Wed Jun 14, 2017 8:33 am
Forum: Hardware
Topic: What video display do you use?
Replies: 26
Views: 1935

Re: What video display do you use?

The trick is to look for DVI transmitters rather than HDMI, there is still compatibility but the resolutions are 'limited' to 1080P. Look at the Ti TFP410 Can't see what difference that chip would make to directly using an FPGA. As soon as you make a device with HDMI output connector, it is no long...
by Peter
Tue Jun 13, 2017 1:43 pm
Forum: Software & Programming
Topic: Status of QMON
Replies: 26
Views: 2010

Re: Status of QMON

Any update on the status of QMON? As to their websites, I can see neither Jochen Merz nor RWAP selling it.
by Peter
Tue Jun 13, 2017 1:32 pm
Forum: Hardware
Topic: What video display do you use?
Replies: 26
Views: 1935

Re: What video display do you use?

On the other hand, is there a 50Hz version of 1024x768 VESA? No, the nearest standardized refesh rates are 43 Hz interlaced and 60 Hz. HDMI - transmitter chips that do not have content protection (so no royalties) can still be found. I'm curious. Have not seen a way to legally get around paying the...
by Peter
Tue Jun 13, 2017 10:13 am
Forum: Hardware
Topic: What video display do you use?
Replies: 26
Views: 1935

Re: What video display do you use?

I too have been toying with some ideas to get a 1024x768 XVGA (at 60Hz) image straight out of RAM, but with limited knowledge/capability around FPGA stuff, had been investigating the bus-snooping approach using a (fast) microcontroller and an SRAM shadowing approach. This is exactly the Q68 VGA out...

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