Search found 2383 matches

by Dave
Wed Jun 26, 2019 2:33 am
Forum: Software & Programming
Topic: Hardware pointers and cursors.
Replies: 10
Views: 212

Re: Hardware pointers and cursors.

I've never used the PE for longer than it takes to disable it. In that brief time I have observed that it displays a no entry symbol of red on white, and a pointer of two colours, and sometimes a question mark of two colours. I have never been exposed to how they are internally formatted. Even the s...
by Dave
Wed Jun 26, 2019 1:31 am
Forum: Hardware
Topic: Issue 8 discussions...
Replies: 101
Views: 5876

Re: Issue 8 discussions...

I'm a little behind... :P :o What's going on is that I have been multitasking. I have done five manual layouts of the Issue 8 and found problems with each - evolving the design to this current 6th iteration. A couple of things I thought were "really good ideas" turned out to be of dubious ...
by Dave
Wed Jun 26, 2019 12:18 am
Forum: Software & Programming
Topic: Hardware pointers and cursors.
Replies: 10
Views: 212

Re: Hardware pointers and cursors.

To make a long story short, the gain in responsiveness will be disappointingly small if at all observable. And it will come at considerable complication to drivers, because under PE the cursor can be more than a 2-bit deep bitmap with the given hardware limitations. The OS updates the cursor under ...
by Dave
Mon Jun 24, 2019 2:07 am
Forum: Hardware
Topic: Aurora
Replies: 5
Views: 248

Re: Aurora

Well, I guess I better get off my ass and assemble these 22 Aurora I have here. I was holding off on them for as long as possible. As for reverse engineering them, it might not be a good investment of time. Nasta has mentioned "Aurora II" a few times, too. The Q68 beats the pants off the A...
by Dave
Mon Jun 24, 2019 1:55 am
Forum: Hardware
Topic: DIY QubIDE Parts list
Replies: 2
Views: 107

Re: DIY QubIDE Parts list

D1 is a BAT41 D2 is a 1N4148 Caps C3-C6 are 100nF, standard bead type Two electrolytics by the 7805 are 10uF 2.54mm (.1") radial, 16v RN1 is a bussed .1" SIL, 8 pin (7 resistors commoned together to the 8th pin) and provides a weak pull down. 3K3 sounds good. 3x GAL16V8 are DIP-20. 1x 74HC...
by Dave
Sun Jun 23, 2019 5:11 pm
Forum: Software & Programming
Topic: Announcing availability of a QLNET driver for the Q68 (ND-Q68)
Replies: 45
Views: 1419

Re: Announcing availability of a QLNET driver for the Q68 (ND-Q68)

I will be uploading a slightly modified board later. It fixes a bug where the termination resistors are wired incorrectly (the signal is wired to ground not the tip, and the termination resistor to the tip, not ground side of the switch. I discovered the switched 3.5mm jacks I bought have a differen...
by Dave
Sat Jun 22, 2019 11:05 pm
Forum: Compatibles Corner
Topic: Q68 serial buffers
Replies: 13
Views: 436

Re: Q68 serial buffers

This might also explain a couple of pcorruptions I had at >38,600 speeds, but they don't show up often.
by Dave
Sat Jun 22, 2019 6:11 pm
Forum: Compatibles Corner
Topic: Q68 serial buffers
Replies: 13
Views: 436

Re: Q68 serial buffers

I haven't received any meaningful mail from that list for a couple of years. Does anyone even use it any more?
by Dave
Fri Jun 21, 2019 5:57 pm
Forum: The Welcome Area
Topic: Hello from Riscman
Replies: 3
Views: 167

Re: Hello from Riscman

Not fake. I've seen the printouts and they are reasonable.
by Dave
Fri Jun 21, 2019 5:21 pm
Forum: Software & Programming
Topic: Hardware pointers and cursors.
Replies: 10
Views: 212

Hardware pointers and cursors.

One of the huge inefficiencies of WIMP systems on the QL is the manually drawn and redrawn pointers (and cursors generally). I've been playing with a system that enabled hardware pointers. For those not in the know, this is an interesting shift of responsibility from OS to hardware. Currently, the O...