Search found 742 matches

by mk79
Sun Nov 29, 2020 8:34 pm
Forum: Hardware
Topic: digital precision lightning rom 2.10 upgrade an installation
Replies: 7
Views: 299

Re: digital precision lightning rom 2.10 upgrade an installation

Old TK2 ROMs had special code that detected if it was invoked from $CC000 and in that case checks if it was already initialised from $C000. So probably some incomplete address decoding going on.
by mk79
Sun Nov 29, 2020 3:51 pm
Forum: Hardware
Topic: digital precision lightning rom 2.10 upgrade an installation
Replies: 7
Views: 299

Re: digital precision lightning rom 2.10 upgrade an installation

No magic, there are probably small signal inverters in the socket below the EPROMs. The basic schematic for using EPROMs is documented many times in this forum.
Enter

Code: Select all

SBYTES flp1_lightning_bin,49152,16384
to get the lightning binary.
by mk79
Sat Nov 28, 2020 8:27 pm
Forum: Help for New Users
Topic: QL Tinkering
Replies: 145
Views: 33514

Re: QL Tinkering

Aaaah, you're actually using the additional "mode 4" colours in high colour for great effect. Clever. Didn't notice because I instinctively switched to QL colour mode before trying your program. That the deep blue maps to black in QL colour mode works out pretty well ;)
by mk79
Sat Nov 28, 2020 7:35 pm
Forum: General QL Chat
Topic: Future QL Zoom Meetings
Replies: 5
Views: 279

Re: Future QL Zoom Meetings

Normally I'd be a the Chaos Communication Congress, a 4 day hacker congress which I used last time to improve QMON (still unreleased, sorry...). But as nothing is normal I guess I have time ;)
by mk79
Thu Nov 26, 2020 10:20 am
Forum: Software & Programming
Topic: Switching screen modes
Replies: 6
Views: 259

Re: Switching screen modes

This is the correc tprocedure to chnage the QL Screen Mode, as just poking the System Variables will chnage the Screen Mode as required, but the operating system will not register the screen mode change, causing a conflicit. This is mentioned most good QL technical books. Yes. But to be pedantic, c...
by mk79
Wed Nov 25, 2020 10:00 pm
Forum: Help for New Users
Topic: QL Tinkering
Replies: 145
Views: 33514

Re: QL Tinkering

Unfortunately I don't have the time to learn the gameplay right now, but I'm in awe of what you manage to pull off in pure basic. Fantastic!

Cheers, Marcel
by mk79
Wed Nov 25, 2020 5:26 pm
Forum: Software & Programming
Topic: Switching screen modes
Replies: 6
Views: 259

Re: Switching screen modes

Ah, now I get your problem. Use MT.DMOD trap to change your screen mode, don‘t poke it in the system variables. That should have the desired effect.
by mk79
Wed Nov 25, 2020 1:00 pm
Forum: Software & Programming
Topic: Switching screen modes
Replies: 6
Views: 259

Re: Switching screen modes

NEW deletes the program and redraws the Basic windows. You're not in Basic, what exactly should happen? If you want to redraw your own C windows, just do a Border/Clear call on them.
by mk79
Wed Nov 25, 2020 8:27 am
Forum: Software & Programming
Topic: QL / PASCAL
Replies: 86
Views: 3644

Re: QL / PASCAL

That is correct. There was a FillChar() call in the original startup code by me for this, which zeroed out the .bss. Ouch, sorry about that :) Back then it was still my understanding that the memory areas were disjunct... There's a quick & dirty hack in the compiler for register-relative addres...
by mk79
Tue Nov 24, 2020 10:19 pm
Forum: Software & Programming
Topic: QL / PASCAL
Replies: 86
Views: 3644

Re: QL / PASCAL

First of all, thanks for taking the time to look and improve my stuff, I know how it is. Is there any mechanism of passing an option to the backend to select which style of output should be produced? What do you mean by "style of output"? Assembler style? Not currently, on the backend, the...