Search found 1376 matches

by Pr0f
Mon Dec 04, 2017 1:11 pm
Forum: Hardware
Topic: Microdrive Unit Design
Replies: 118
Views: 58948

Re: Microdrive Unit Design

I would say the socket could introduce the possibility of some additional electrical noise, and possibly some noise due to the (all be it small) vibrations of the motor, no matter how good and tight the socket is.
by Pr0f
Fri Dec 01, 2017 3:16 pm
Forum: Hardware
Topic: Discussion about connecting RASPI to QL
Replies: 58
Views: 30118

Re: Discussion about connecting RASPI to QL

So very true Peter - what does a pi give you that you can't get / do already...

If you got Bluetooth running on a QL - what would you use it for ?
by Pr0f
Fri Dec 01, 2017 1:38 pm
Forum: Hardware
Topic: Discussion about connecting RASPI to QL
Replies: 58
Views: 30118

Re: Discussion about connecting RASPI to QL

A task co processor would be something you can offload work to. I didn't want to call it coprocessor, as that to me implies the much closer coupling in an FPU or MMU for instance, and the pi won't give you that. It would be possible to give the pi a to do list and some data and let it get on with it...
by Pr0f
Fri Dec 01, 2017 11:20 am
Forum: General QL Chat
Topic: I, Zarchos, have a major announcement that will
Replies: 16
Views: 9923

Re: I, Zarchos, have a major announcement that will

or build a go karting track outside for the gamers and makers :-)
by Pr0f
Fri Dec 01, 2017 7:33 am
Forum: Hardware
Topic: Discussion about connecting RASPI to QL
Replies: 58
Views: 30118

Re: Discussion about connecting RASPI to QL

What would be the end goal of connecting a Raspberry pi (zero ?) to the QL ? I see several possibilities: Wifi Bluetooth HDMI screen output Numerous SPI / I2C / 1 Wire / UART interfaces and other GPIO Storage device Task Co processor The main issue would appear to be who could write drivers for all ...
by Pr0f
Wed Nov 29, 2017 11:43 am
Forum: Hardware
Topic: Discussion about connecting RASPI to QL
Replies: 58
Views: 30118

Re: Discussion about connecting RASPI to QL

Looking at the speccynext web site, they moved away from using the Raspberry Pi to provide hdmi output, and now seem to have the hdmi connector directly on board and driven by the FPGA. They still retain the 40 pin connector though, as the pi could be used for all sorts I guess... There are some hur...
by Pr0f
Wed Nov 29, 2017 7:29 am
Forum: Software & Programming
Topic: BASIC: Returning non-scalar values from Procs
Replies: 12
Views: 5829

Re: BASIC: Returning non-scalar values from Procs

It's a distant memory, but wasn't the MEM device from Simon Goodwin's DIY toolkit capable of some fairly impressive memory manipulation? I still haven't found all my old magazine cut outs, but I remember using it as some sort of RAM buffer for a data collection device a long while ago - nothing flas...
by Pr0f
Wed Nov 29, 2017 7:24 am
Forum: Hardware
Topic: Q68 page
Replies: 17
Views: 8219

Re: Q68 page

Not sure if this is the right place to ask such a question, but is the I2C interface on the Q68 available through a trap call mechanism, like the one on Minerva ?

Or is it accessible only as a direct hardware port at the current time?

BTW - the manual looks excellent :)
by Pr0f
Tue Nov 28, 2017 3:06 pm
Forum: For Sale
Topic: Microdrives - removed from original QL
Replies: 3
Views: 3976

Re: Microdrives - removed from original QL

Sold :)
by Pr0f
Tue Nov 28, 2017 2:35 pm
Forum: Hardware
Topic: Q68 page
Replies: 17
Views: 8219

Re: Q68 page

I think a 96Kb is ok, rather than an, it's how it scans that's important, an followed by 9 or ninety doesn't scan.