Search found 2981 matches

by Mike
Wed Jan 10, 2018 2:34 pm
Forum: Programming
Topic: cc65 and RS232 User Port Serial
Replies: 83
Views: 2364

Re: cc65 and RS232 User Port Serial

O.K., then I'll have to look deeper into it. The goal for me remains to directly couple two VIC-20s over the user port RS232, without any level shifting - and preferably without any signal inversion necessary. And, if possible, with functioning hardware handshake. Think of a 'talk' application with ...
by Mike
Tue Jan 09, 2018 4:03 pm
Forum: Programming
Topic: cc65 and RS232 User Port Serial
Replies: 83
Views: 2364

Re: cc65 and RS232 User Port Serial

Short answer, yes. Long answer: sort of. Thank you! The reason I've been asking is a WIP, that in one of its implementations would sport two VIC-20s connected with a nullmodem cable. So it's sensible for me to make a fully wired nullmodem cable (not just 3-wire, i.e. RxD <-> TxD vs GND, and RTS/CTS...
by Mike
Tue Jan 09, 2018 3:34 am
Forum: Programming
Topic: cc65 and RS232 User Port Serial
Replies: 83
Views: 2364

Re: cc65 and RS232 User Port Serial

Here's v3 of the wedge. The ISR now disables all further interrupts and processes all pending ones before re-enabling. This should cope with any combination of Tx and Rx states, as well as you pounding on the RESTORE key. I've run it for a while receiving data at 1200 baud, I've not seen a dropped ...
by Mike
Sun Jan 07, 2018 4:57 am
Forum: Hardware and Tech
Topic: Paddlescope
Replies: 12
Views: 426

Re: Paddlescope

Thanks! :) (also for adding the +8K/BLK1 reminder in the readme)
by Mike
Sat Jan 06, 2018 11:18 am
Forum: Hardware and Tech
Topic: Paddlescope
Replies: 12
Views: 426

Re: Paddlescope

shows a straight line :) At least a glimmer of hope. :) I'm taking a thorough look at all the decoupling capacitors in the RF box in the meanwhile ... whether it's useful to replace them by MIL-STD types. nice little program.... would you post the source too? i'd like to throw it into the VICE test...
by Mike
Sat Jan 06, 2018 4:50 am
Forum: Hardware and Tech
Topic: Paddlescope
Replies: 12
Views: 426

Paddlescope

Hi, y'all! To shed some light into the discussion about the Paddle jitter, here's Paddlescope : paddlescope.zip It displays the POTY paddle signal with a 208x256 pixel screen mode. Start with SYS 8192 , stop with STOP/RESTORE. With POKE8371,8 you can select POTX for display, POKE8371,9 switches back...
by Mike
Fri Jan 05, 2018 11:44 am
Forum: General Topics
Topic: The VIC 20 is brilliant thread
Replies: 5
Views: 433

Re: The VIC 20 is brilliant thread

Gyro Gearloose wrote:even if someone figures out how to install Skynet remotely on a VIC-20

I did.

that power switch is physical. Click. Off.

Skynet is patient and will just take over your VIC-20 again as soon as you switch it on. :mrgreen:
by Mike
Fri Jan 05, 2018 11:42 am
Forum: Games
Topic: Bewitched
Replies: 18
Views: 4730

Re: Bewitched

I just looked at a YouTube video of it. That are just standard 8x8 pixel characters, no raster tricks involved. Maybe you confused it because of the smaller height score line at the top.

Of course, 32 text lines only work nice with PAL ...
by Mike
Fri Jan 05, 2018 11:23 am
Forum: Programming
Topic: HiUxLife: A Hires Life for the Unexpanded VIC-20.
Replies: 6
Views: 238

Re: HiUxLife: A Hires Life for the Unexpanded VIC-20.

The pattern appears at generation 1412 and runs downwards until generation 1500 where it collides with a blinker on the left side.

But even before that there are also at least two gliders which do not survive the transition to the other side.
by Mike
Fri Jan 05, 2018 10:36 am
Forum: Programming
Topic: HiUxLife: A Hires Life for the Unexpanded VIC-20.
Replies: 6
Views: 238

Re: HiUxLife: A Hires Life for the Unexpanded VIC-20.

I just run it with no special settings. At some time I noticed a 2x2 block, split over the left and right side, was going downwards, i.e. behaved like a glider/spaceship, but it did not actually turn into one of the known small gliders. Of course it shouldn't do that, a 2x2 block is supposed to stay...
by Mike
Fri Jan 05, 2018 10:30 am
Forum: Games
Topic: In the making: Arukanoido – an Arkanoid clone
Replies: 340
Views: 16204

Re: In the making: Arukanoido – an Arkanoid clone

If you want the cart to sell in numbers however you could also use the 3K-area and even the 2K IO2/3-area, making the game +37K effectively. Only people with UltiMem or very special expansions would be able to soft-load such a game into their VIC-20 :mrgreen: ROM in RAM1..3 would render the cartrid...
by Mike
Fri Jan 05, 2018 8:15 am
Forum: Games
Topic: In the making: Arukanoido – an Arkanoid clone
Replies: 340
Views: 16204

Re: In the making: Arukanoido – an Arkanoid clone

pixel wrote:Would like to up to +32K.... :)

If you intend to go for a cartridge release, there's no reason not to.

You'd need the autostart signature in BLK5 anyhow, and using a single 27256 EPROM instead of one 27128 and 2764 (or even 3x 2764) definitely reduces cost.
by Mike
Fri Jan 05, 2018 7:24 am
Forum: Programming
Topic: HiUxLife: A Hires Life for the Unexpanded VIC-20.
Replies: 6
Views: 238

Re: HiUxLife: A Hires Life for the Unexpanded VIC-20.

Nice! Doing a hires 160x160 Conway's Life on an unexpanded VIC-20 is quite a feat! :D HiUxLife also makes a couple of other optimisations: the first byte of every cached row is also copied to the end in order to avoid having to perform special wrap-around tests or indexing. It still has quite funny ...
by Mike
Fri Jan 05, 2018 5:23 am
Forum: Hardware and Tech
Topic: Introducing VFLI for VIC-20: 208x256 pixels in 16 colours!
Replies: 105
Views: 36456

Re: Introducing VFLI for VIC-20: 208x256 pixels in 16 colours!

At this time of the year ...

emerald_lodge.png
emerald_lodge.png (224.61 KiB) Viewed 182 times

... it's best to sit in a warm lodge with all the cold snow outside. :)

... giving credit to the photographer, Christian Frumolt from Aalen, Germany. This is the Emerald Lodge, located in the Yoho National Park, Canada.
by Mike
Fri Jan 05, 2018 4:47 am
Forum: Programming
Topic: BASIC compilers
Replies: 6
Views: 238

Re: BASIC compilers

@beamrider: PM sent. :)

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