Search found 1075 matches

by Peter
Wed Apr 19, 2017 8:02 pm
Forum: Compatibles Corner
Topic: Q68 case
Replies: 8
Views: 3660

Re: Q68 case

It was my plan to add "Q68" in 3D letters on the front, like the "QL" letters on the original, but all I found yet are too large. I tried to provide at least some QL similarity by the white lasered backside labels, and using a case with some riffles on side and top. The LED color...
by Peter
Wed Apr 19, 2017 8:45 am
Forum: Compatibles Corner
Topic: Q68 case
Replies: 8
Views: 3660

Re: Q68 case

The case is a B2-080BK from Box Enclosures, probably easier if you order it in the US. I had the front- and back panels made separately. With access to a milling center, it would save cost and material to use the panels that come with the case. The only thing missing would be the white laser engrave...
by Peter
Tue Apr 18, 2017 9:27 pm
Forum: Compatibles Corner
Topic: Q68 case
Replies: 8
Views: 3660

Q68 case

This is how my Q68 looks inside a case with new front- and backpanel design:

Q68inCase1.jpg


Q68inCase2.jpg
by Peter
Tue Apr 11, 2017 10:29 am
Forum: Hardware
Topic: Fun things to do with an MC68EC020....
Replies: 153
Views: 38225

Re: Fun things to do with an MC68EC020....

The Q68 uses bitbanging for the RTC, as it's only read at startup and not speed critical. One unidirectional output register for the I2C clock. And one "open drain" input/output for I2C data. Should be easy to implement. I wrote a little C Program to set the clock, which should also work f...
by Peter
Mon Apr 10, 2017 7:31 pm
Forum: Hardware
Topic: Fun things to do with an MC68EC020....
Replies: 153
Views: 38225

Re: Fun things to do with an MC68EC020....

If you wish to add a realtime clock with integrated crystal and charger, you could take the DS1374C also used on the Q68.
by Peter
Fri Apr 07, 2017 9:27 am
Forum: Hardware
Topic: QL upgrade versus Q68
Replies: 67
Views: 16183

Re: QL upgrade versus Q68

Thank you Doug. Meanwhile "alea iacta est" for the Q68 as a standalone system. As the Q68 fits into a QL case mechanically, it is still possible to a) Connect the Q68 to the QL mainboard with a simple adaptor (yet to be designed) and let the 68008 work as coprocessor to exchange some QL as...
by Peter
Fri Apr 07, 2017 8:36 am
Forum: Hardware
Topic: Machine detection by hardware
Replies: 13
Views: 3322

Re: Machine detection by hardware

ROM would be easy, I guess you would use Flash, so it is probably programmable on both the Q68 and your machine, no hardware change at all.
by Peter
Thu Apr 06, 2017 2:12 pm
Forum: Hardware
Topic: Machine detection by hardware
Replies: 13
Views: 3322

Re: Machine detection by hardware

While it is historically interesting to hear about the Thor, that sounds more like a deliberatley obfuscated method used for dongles. I am not looking for CPU identification. The idea is to maybe provide a piece of hardware that allows to distinguish the Q68 from other machines with the same CPU. I ...
by Peter
Wed Apr 05, 2017 8:46 am
Forum: Hardware
Topic: Expansion serial card?
Replies: 36
Views: 7303

Re: Expansion serial card?

One thing to keep in mind is that the Raspberry PI usually is a Linux machine that takes a significant time to boot. During this time, the QL would have no microdrive, mouse, serial, etc. The other question is, how much software emulation you want. If you emulate a lot, you might end up asking yours...
by Peter
Wed Apr 05, 2017 8:30 am
Forum: Hardware
Topic: Machine detection by hardware
Replies: 13
Views: 3322

Re: Machine detection by hardware

I guess SMSQ/E just marks the machine type from knowing its own binary. But here the idea was to provide a hardware check that any OS could use. The CPU is plain 68000, so it doesn't offer much to distinguish the Q68 from a QL or GC for example. Also, in case of further development, it could be nice...