Search found 436 matches

by Silvester
Sat Mar 02, 2024 4:23 pm
Forum: The Off-Topic Section
Topic: Neo6502
Replies: 6
Views: 889

Re: Neo6502

Just listened to interesting podcast on Hackaday with Eben Upton on all things Pi where he is asked what was his favourite programming language (@ 1hr 2min 26secs). Close contest between 6502 and 68000 :D
by Silvester
Thu Feb 22, 2024 3:03 pm
Forum: Software & Programming
Topic: Joystick/Sound in Supervisor mode?
Replies: 66
Views: 2308

Re: Joystick/Sound in Supervisor mode?

tofro wrote: Thu Feb 22, 2024 1:07 pmThere is, however, an even better method that also unlinks the polling routine when you end the program by Marcel somewhere here on the site.
? https://www.qlforum.co.uk/viewtopic.php ... =10#p45932
by Silvester
Sat Feb 17, 2024 3:27 pm
Forum: The Off-Topic Section
Topic: Neo6502
Replies: 6
Views: 889

Re: Neo6502

So it turns out the NEO6502 couldn't be easier to use :-) It comes with with something already installed ( ProDOS , a filer/launcher front end to Apple II emulation, complete with BASIC and a dozen games). Just needed to hook up HDMI monitor, USB-A keyboard, power to USB-C and the system is up and r...
by Silvester
Wed Feb 14, 2024 4:03 pm
Forum: The Off-Topic Section
Topic: Today I Received...
Replies: 642
Views: 285586

Re: Today I Received...

I keep seeing those advertised - I've got a couple of the lilygo boards already - and they are wonderful little things - but I am struggling to justify why I might need this one ;-) Same here, almost hit 'Buy' on Bangood but then read this reality check (see comment by andrewstuart :lol: ). Screen ...
by Silvester
Wed Feb 14, 2024 3:44 pm
Forum: The Off-Topic Section
Topic: Neo6502
Replies: 6
Views: 889

Re: Neo6502

Ha!, just received mine today from PiHut, along with a AgonLight2 with case and protoboard. No case yet available for Neo6502 unless you 3D print one.
by Silvester
Tue Feb 06, 2024 8:09 pm
Forum: Software & Programming
Topic: Interrupt vector and Minerva
Replies: 11
Views: 555

Re: Interrupt vector and Minerva

What does that do? Disables the interface interrupt (IPC activity). Value gets copied to ZX8302 interrupt mask register. QDOS never used it but Minerva introduced it to respond to IPC (Hermes). But it causes slow down on non-Gold systems (FLP activity, POKE!!53,128 restores performance). Don't know...
by Silvester
Tue Feb 06, 2024 5:00 pm
Forum: Software & Programming
Topic: Interrupt vector and Minerva
Replies: 11
Views: 555

Re: Interrupt vector and Minerva

Try POKE!!53,128
by Silvester
Mon Dec 11, 2023 11:05 am
Forum: Hardware
Topic: MicroPeripherals Disk Interface ROM
Replies: 15
Views: 3724

Re: MicroPeripherals Disk Interface ROM

I bought this interface from Dennis Briggs in about 1988 at a QL show. He mentioned his stock of MP interfaces had been updated with the official upgrade from QJump.
QJump123.jpg
MP1.JPG
MP2.JPG
I also have a copy of the v1.23 ROM (8K), don't know the status...
by Silvester
Sat Dec 09, 2023 7:40 pm
Forum: Hardware
Topic: QIMSI
Replies: 101
Views: 42587

Re: QIMSI

Miracle WIN driver sets up poll routine to check if booted then reverts device name from MDV to WIN. So no WIN_USE WIN required :D haven't looked but I guess Tebby FLP drivers do same. INIPOL tst.l $0100(a6) ;SV_FSDEV, first entry beq.s POLINT ;if already booted then... move.l $0044(a3),$003E(a3) ;c...
by Silvester
Fri Nov 10, 2023 3:27 pm
Forum: Software & Programming
Topic: QMAC Assembler
Replies: 8
Views: 3488

Re: QMAC Assembler

Isn't it because prog_end-start can be resolved immediately as an absolute number. But 16384-prog_end can't because prog_end position can't be resolved until linking/assembly? (16384 seen as fixed address, thus dcb.w size can't be resolved). QMAC manual page 29 Relocation factors: +1-1 (=0 absolute)...