Search found 230 matches
- Sun Jun 02, 2024 11:21 am
- Forum: Hardware and Tech
- Topic: Victor Progress
- Replies: 4
- Views: 170
Re: Victor Progress
Is there still hope though that the final PCB will have a footprint comparable to the original size of the VIC chip? I've got a friend with a good pick'n'place machine and reflow equipment, so I have every expectation that the final board will fit in a DIP40 outline, but it'll take a couple of trie...
- Sat Jun 01, 2024 2:43 pm
- Forum: Hardware and Tech
- Topic: Kung Fu Flash - like device?
- Replies: 7
- Views: 206
Kung Fu Flash - like device?
Wotcha! So I asked about banked EEPROMs, and they don't seem to really exist in a form in which I could use them. So how about something like the Kung Fu Flash, which pretends to be a floppy drive by taking over some of the vectors from the KERNAL, pulling data off a microSD card super fast, and rea...
- Sat Jun 01, 2024 12:08 am
- Forum: Hardware and Tech
- Topic: Victor Progress
- Replies: 4
- Views: 170
Victor Progress
For those of you with pachydermal memories, you may recall that I was using an FPGA to develop a replacement for the 6560/61 VIC chip. This project stalled for quite a while because of ill health and another project I wanted to finish. I'm now restarting work on Victor, and the next task is to creat...
- Fri May 31, 2024 11:49 pm
- Forum: Hardware and Tech
- Topic: Paged EEPROM
- Replies: 5
- Views: 151
Re: Paged EEPROM
Are these available pre-built and firmware flashed?
- Fri May 31, 2024 11:27 pm
- Forum: Hardware and Tech
- Topic: Powering a C64 (or VIC-20) with a USB Power Bank
- Replies: 9
- Views: 5261
Re: Powering a C64 (or VIC-20) with a USB Power Bank
https://www.instructables.com/Simple-Dc ... rter-Make/ might be a starting point
- Fri May 31, 2024 11:17 pm
- Forum: General Topics
- Topic: Victor at VCFSW (June 14-16th 2024)
- Replies: 0
- Views: 122
Victor at VCFSW (June 14-16th 2024)
If you are in Dallas for Vintage Computer Festival South West this year, I'll be demonstrating Victor.
(mod: see www.vcfsw.org)
(mod: see www.vcfsw.org)
- Fri May 31, 2024 11:16 pm
- Forum: Hardware and Tech
- Topic: Paged EEPROM
- Replies: 5
- Views: 151
Paged EEPROM
I don't suppose there exists an expansion cartridge that is one (or preferably more) largest EEPROMs setup to map into the $A000-$AFFF and $B000-$BFFF spaces, but with banking registers so you can select which block of EEPROM appears in each of the ranges?
- Fri May 31, 2024 11:11 pm
- Forum: Hardware and Tech
- Topic: Audio to expansion port
- Replies: 5
- Views: 269
Re: Audio to expansion port
You could design a cartridge with a SID in it and feed the output back using pin Y so that it comes out through the regular AV DIN connector on the back of the machine.
- Wed Feb 14, 2024 4:16 pm
- Forum: Programming
- Topic: Playing better notes
- Replies: 1
- Views: 1635
Playing better notes
I read, somewhere, of a program that toggles between two values in a sound register to produce frequencies closer to real notes - do any of you know what I'm talking about and where I could get it from?
- Tue Feb 13, 2024 5:49 pm
- Forum: Hardware and Tech
- Topic: Powering a C64 (or VIC-20) with a USB Power Bank
- Replies: 9
- Views: 5261
Re: Powering a C64 (or VIC-20) with a USB Power Bank
Something's not firing on all cylinders - Denial has just emailed me to notify me that Mike made that post!
- Sat Feb 03, 2024 8:35 pm
- Forum: Hardware and Tech
- Topic: Victor 6560 Replacement - Added graphics ops, just for fun
- Replies: 5
- Views: 2039
Re: Victor 6560 Replacement - Added graphics ops, just for fun
...you might want to take a sharp look at my ellipse routine (snippet taken from one of my example programs for MINIGRAFIK): If you're following in my footsteps, you might need to know that the range of some of those variables is somewhat larger than you'd imagine: For a resolution of 172x184, e(-5...
- Wed Jan 24, 2024 10:10 pm
- Forum: Hardware and Tech
- Topic: Victor 6560 Replacement - Added graphics ops, just for fun
- Replies: 5
- Views: 2039
Re: Victor 6560 Replacement - Added graphics ops, just for fun
I'm assuming (MX,MY) is the center point and that A and B are the major and minor radii? What you have here looks very similar to the code I have in Victor, give or take the ellipsy bits. I'll stare at this for a while and see if I can get it going. Thanks! Rounded rectangles would be neat, but that...
- Tue Jan 23, 2024 6:30 pm
- Forum: Hardware and Tech
- Topic: Victor 6560 Replacement - Added graphics ops, just for fun
- Replies: 5
- Views: 2039
Victor 6560 Replacement - Added graphics ops, just for fun
I've not been working on Victor, the 6560/61 replacement FPGA, for a little while due to health issues. To break myself back into working on it I implemented some graphics primitives, just for fun. Drawing points, lines, boxes, rectangles, circles and filled circles: https://www.youtube.com/watch?v=...
- Sun Jan 07, 2024 8:29 pm
- Forum: Programming
- Topic: Pixel, pixel, on the wall - who's the squarest of them all?
- Replies: 3
- Views: 3778
- Sun Jan 07, 2024 10:40 am
- Forum: Hardware and Tech
- Topic: Vic 20 Rev D, low voltage across the board, black screen
- Replies: 16
- Views: 8056
Re: Vic 20 Rev D, low voltage across the board, black screen
It's worth noting that 74LS series chips aren't as plentiful as they used to be, and unscrupulous dealers will sell you re-marked 74HC chips (or is it HCT?), claiming them to be LS. They'll often work for the job in hand, but you need the real thing occasionally, especially in crystal oscillator clo...