Search found 1265 matches

by Dave
Tue May 23, 2017 11:52 pm
Forum: General QL Chat
Topic: Gmail/WLM duplicate emails
Replies: 1
Views: 75

Re: Gmail/WLM duplicate emails

This is useful, but I think it should be in the off-topic section ;)
by Dave
Tue May 23, 2017 7:57 pm
Forum: Hardware
Topic: Discussion about connecting RASPI to QL
Replies: 19
Views: 898

Re: Discussion about connecting RASPI to QL

Ok. I've worked it around the 74LVX245. Proposal: IC1: GAL16V8 IC2: 74LVX245 for D0:7 IC3: 74LVX245 for A0:7 IC4: 74LVX245 for A8:13 ** A0:13 provides 16K addressable area, like any expansion. ** /SEL select from GAL pin 17 ** R/W from GAL pin 16 to Pi IC5: 74LVX245 ** You pick 8 other lines from MC...
by Dave
Mon May 22, 2017 6:10 pm
Forum: Compatibles Corner
Topic: CST Thor 1
Replies: 43
Views: 2872

Re: CST Thor 1

Do you have a copy of the Thor manual around there somewhere? I know it says something about this.

It could also be a problem decoding addresses so the ROM content is valid but the ROM addressing is faulty, so it reads mush?
by Dave
Mon May 22, 2017 5:49 pm
Forum: Hardware
Topic: Ethernet...
Replies: 0
Views: 78

Ethernet...

One of the advantages of being a former Silicon Labs contractor is.... getting $300 of components for $120.

IMG_1625.jpg


Looks like this is moving from "nice to think about" to "in development." I have the expensive parts. I just don't have the logic.
by Dave
Mon May 22, 2017 5:22 pm
Forum: Hardware
Topic: New QL backplane.
Replies: 28
Views: 1235

Re: New QL backplane.

Then what happens is I say $30, for example, and I get the equivalent of $25.87 in some random currency. When I convert that to US$ they take another cut and I actually get $23.96, so I just lost $6.04. I either have to insist on just receiving $, and passing the exchange costs onto the person, or j...
by Dave
Mon May 22, 2017 4:27 pm
Forum: Hardware
Topic: New QL backplane.
Replies: 28
Views: 1235

Re: New QL backplane.

Hehe... Before, I got burned by people taking advantage of the ever-changing exchange rates. The dollar was doing strange things. It cost me about 15% on some orders, which since I'm now doing this on a hobby/non-profit basis and I don't want to pad the prices.... best to just give the price in all ...
by Dave
Mon May 22, 2017 3:07 pm
Forum: Hardware
Topic: New QL backplane.
Replies: 28
Views: 1235

Re: New QL backplane.

I tell you what guy, I'll send you these ones, and if you find the connectors too tight a fit in the top row, I'll send you replacements from the next batch at no charge. Sound fair?
by Dave
Mon May 22, 2017 1:10 am
Forum: Hardware
Topic: Discussion about connecting RASPI to QL
Replies: 19
Views: 898

Re: Discussion about connecting RASPI to QL

As the GPIO is 3.3V and QL is 5V some interfacing has to take place. For Example by using 74LVX245 ICs. Thats why I am so keen on any Information about buffered QL backplanes. It's not easy to figure out the possible ways how the bus can be used (directionwise) because I guess while "normal&qu...
by Dave
Sun May 21, 2017 8:57 pm
Forum: Hardware
Topic: New QL backplane.
Replies: 28
Views: 1235

Re: New QL backplane.

I've assembled a couple and done the needed testing. I also spent last night writing a manual. It is moderately cute, mildly amusing and horrendously terse. There are photos. So now the long haul as I assemble and test TWENTY of them. That leaves EIGHT blank PCBs for those who want to install their ...
by Dave
Sun May 21, 2017 7:55 pm
Forum: Hardware
Topic: QLAN-USB Adapter - working prototype...
Replies: 4
Views: 274

Re: QLAN-USB Adapter - working prototype...

I'd be interested in making a few of these so they're available to those that want them. If you evolve the design to where you're confident the hardware is solid, would you be interested in having me make a batch of 25? I'm sure a few would sell right away. This does solve a major problem many of us...

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