Search found 156 matches

by rwv01
Sat Jul 01, 2023 10:17 pm
Forum: Other Systems
Topic: Help modifying C64 PAL code for NTSC machine
Replies: 5
Views: 2300

Re: Help modifying C64 PAL code for NTSC machine

Thanks again, groepaz. I've been trying those changes applied to line 130, data value 124. Changed 124 to 103, 102, 104, and even 144 (going the opposite way). So far, all I can get the receiver program to do is go from a waiting state to "basic mode" once the square starts flashing. The &...
by rwv01
Fri Jun 30, 2023 7:21 pm
Forum: Other Systems
Topic: Help modifying C64 PAL code for NTSC machine
Replies: 5
Views: 2300

Re: Help modifying C64 PAL code for NTSC machine

Thanks groepaz. .C:c044 A0 7C LDY #$7C ; tweak this, perhaps (60*$7c)/50 = $94 So instead of LDY #$7C it would be LDY #$94C ? Sorry my programming skills are VERY limited Also, from a related article; "The receiving program waited for the first edge of each start bit, waited a further 10 millis...
by rwv01
Fri Jun 30, 2023 6:17 pm
Forum: Other Systems
Topic: Help modifying C64 PAL code for NTSC machine
Replies: 5
Views: 2300

Help modifying C64 PAL code for NTSC machine

Hi folks. I've been playing around with an odd experiment from the '80s called Visicode. A method for transmitting BASIC code via a flashing square on a TV screen during a broadcast of the British computer show "Four Computer Buffs". Video: https://www.youtube.com/watch?v=xxo1Gs46ti0 Magaz...
by rwv01
Wed Mar 08, 2023 10:11 pm
Forum: Other Systems
Topic: Which user port ground pin for project?
Replies: 1
Views: 1861

Which user port ground pin for project?

Hi all. I'm building a user port interface from an old schematic I found in a disk image. It's for the C64. A ham radio interface for de-coding FAXes and Slow-Scan TV images https://en.wikipedia.org/wiki/Slow-scan_television . Anyway, If someone can help me, I just need to know which "pin"...
by rwv01
Sat Apr 25, 2020 11:49 pm
Forum: Hardware and Tech
Topic: Send "F1" command to computer via controller?
Replies: 8
Views: 599

Re: Send "F1" command to computer via controller?

Thanks for your replies.
Well, patching the F1 key to the control port would be the most practical way to do it, but I'd rather not
hack the VIC itself. If a software wedge is possible, would it work like the CardKey numeric keypad and software combination?
by rwv01
Wed Apr 22, 2020 6:26 pm
Forum: Hardware and Tech
Topic: Send "F1" command to computer via controller?
Replies: 8
Views: 599

Send "F1" command to computer via controller?

Hi guys. I would like to have a way to start games from the controller that normally require "F1" to start such as Avenger. Does anyone know of a new controller that can do this? Is it possible to modify a controller, e.g. by adding new components, to send the correct signal for "F1&q...
by rwv01
Sat Oct 28, 2017 11:52 pm
Forum: Hardware and Tech
Topic: Vic 20 user port at no more than 1200 baud?
Replies: 31
Views: 3326

Re: Vic 20 user port at no more than 1200 baud?

OK. I was able to use the wedge at 2400 baud with Ninjaterm and Plus Term. I loaded the wedge using ",8,1" and the terminal programs with ",8 +run". Also tried it with Mighty Term, but could not get it to work. Mighty Term has to be loaded using ,8,1, then sys8192. Could that be ...
by rwv01
Thu Oct 26, 2017 11:59 pm
Forum: Hardware and Tech
Topic: Vic 20 user port at no more than 1200 baud?
Replies: 31
Views: 3326

Re: Vic 20 user port at no more than 1200 baud?

Thanks for the update, srowe.
I'll let you know what happens!
by rwv01
Sun Oct 22, 2017 5:05 pm
Forum: Hardware and Tech
Topic: Vic 20 user port at no more than 1200 baud?
Replies: 31
Views: 3326

Re: Vic 20 user port at no more than 1200 baud?

Thanks guys. I tried srowe's wedge but I could only get up to 1200 baud, even with ninjaterm. Of course It could be just my equipment, or maybe I didn't load the wedge properly. I loaded it first with 32k ram (,8 + run right?), and at the ready promt I loaded the terminal program and ran it. As I un...
by rwv01
Thu Oct 19, 2017 12:51 am
Forum: Hardware and Tech
Topic: Vic 20 user port at no more than 1200 baud?
Replies: 31
Views: 3326

Vic 20 user port at no more than 1200 baud?

Hi guys.
For some reason, I my Vic is only able to operate at 1200 baud or less
with my modem or RS232 interface. The modem is an Aprotek Minimodem C24 and the RS232
interface is a Vic 1011A, both capable of 2400 baud rates as are the terminal programs used supposed to be.
Any ideas about this?
by rwv01
Fri Oct 13, 2017 1:55 am
Forum: Games
Topic: Trying to load Doom but need help please
Replies: 8
Views: 2845

Re: Trying to load Doom but need help please

I was beginning to suspect that. Thanks, torka and Imperious.
Your help is much appreciated!
by rwv01
Thu Oct 12, 2017 4:16 am
Forum: Games
Topic: Trying to load Doom but need help please
Replies: 8
Views: 2845

Re: Trying to load Doom but need help please

That makes sense with another test I did.
I also ran crosstalk with only the 3k+16k ram cart installed.
and it reported crosstalk between blocks 0 abd 2.

For some reason I couldn't get Memtest to work no matter how the memory was configured though.
by rwv01
Wed Oct 11, 2017 7:12 pm
Forum: Games
Topic: Trying to load Doom but need help please
Replies: 8
Views: 2845

Re: Trying to load Doom but need help please

Well, I ran the memtest and crosstalk programs and this is what happened: Memtest, when run, says "Filling memory" "Please wait 7 minutes" Then it says "Error in 1024" "Break in 70" It does this no matter what memory configuration I use with of without the car...
by rwv01
Wed Oct 11, 2017 4:23 am
Forum: Games
Topic: Trying to load Doom but need help please
Replies: 8
Views: 2845

Re: Trying to load Doom but need help please

Very kind of you!
Thanks. I'll let you know what happens.
by rwv01
Tue Oct 10, 2017 6:13 pm
Forum: Games
Topic: Trying to load Doom but need help please
Replies: 8
Views: 2845

Trying to load Doom but need help please

Hi guys. When I load Doom I can only get as far as the "start new game" screen. If I select one of the 3 options, it just freezes. My hardware set up relative to this is; NTSC Vic, 1541 or SD2IEC, 3k+16k switched ram cart (for 3k requirement), 32k ram cart. I'm using a HesCard 20 cartridge...