ivop

I've seen prototype new hardware running on an unmodified 800XL having no problems with divisor zero because they put schmitt-triggers on the serial and clock lines. It even went up to about 250kbps when externally clocked.

Haha, yeah, I guess that happened when I increased the saturation

Has anyone dumped the firmware yet? Mine says: ATARI 1027 A 0 83.8.5 It seems that by running the program/verify waveforms from an Arduino (for example) should be able to retrieve the data inside. NEC8749.pdf

From the command line, I count colours with pnmcolormap: $ pngtopnm output.png | pnmcolormap 2 >/dev/null pnmcolormap: making histogram... pnmcolormap: 78 colors found pnmcolormap: choosing 2 colors... Basically, this is the first step of pnmquant and discarding the output, because I'm only interested in the number of colours found

20 colours: ivop_audi.xex

82 colours: ivop_miner2049er.xex

You can also take output.png from your conversion directory. Saves the trouble of creating a screenshot.

Thanks! 11kHz is quite a feat already. Don't think there's much improvement possible there Even if one could get to 12 or 13 kHz, the difference would be negligible.

Hi, Years ago, I created a MOD player for the Atari 8-bit (https://demozoo.org/productions/145663/). Considering my age and overall knowledge at the time, it wasn't bad. But, now that I'm more than twice as old (and wiser ) I think I can do a lot better. So, I was wondering, what is currently considered the best MOD player and at what frequency does it play the samples? What's the state-of-the-art player to beat? Thanks! Ivo

http://www.ebay.com/itm/altera-Mini-Usb-Blaster-Cable-For-CPLD-FPGA-NIOS-JTAG-Altera-Programmer-/200943750380 Including shipping, it's actually cheaper than the micro match connector Does take 3-5 weeks to be delivered though. Yeah, hopefully Simius will release a few versions with different palettes. I don't mind the PAL palette (prefer it even), but I can imagine Americans want an NTSC palette because that's what they're used to.

http://www.ebay.com/itm/8-215570-0-TE-Connectivity-10-Way-Micro-MaTch-IDC-Ribbon-Connector-/182288456444

OK, let's be constructive This is the kind of tune that makes everybody run for the volume knob. The bass and the melody are in totally different keys! Now for the constructive part: I'm under the impression that a lot of the songs you post are MOD file conversions. Within MOD files, it is entirely possible that when a pattern says it's playing a C-4, it is actually playing a completely different note because the sample that is used for that instrument is not tuned to C but to some other note, let's say it's a D-4. Another channel/instrument that is tuned to a C note sample has to play a D-4 to sound in unison with the previous instrument. Now, you convert the patterns to RMT and it will play a C-4 and a D-4 note together instead of two D-4's as was intended by the original author of the MOD file. This will sound horrible. To fix that, you have to transpose all notes played by the first instrument by a full note up. You "vierkanal" song didn't have any problem BTW and hence sounded perfect.

A feature that would be nice to have is small playfield width support. Gives you some extra cycles to change colours and placement of players, at the cost of a smaller image. The images I did before could possibly look even better.

Perhaps you could optionally support the 128kB S/XEGS RAMCart . That way you can switch $4000-$7FFF and $8000-$BFFF, effectively bank switching 32kB. Or maybe we need a new RAM upgrade that can switch a full 48kB, including stack and page zero through an Axlon style bank switching location

Packages are in the mail!

I have received the boards today! I'll start packaging tonight or tomorrow morning and expect to send them out late afternoon tomorrow.. Two people have not payed yet. Of one I'm fairly sure I'll get the money, but the other has not even read the two personal messages I sent, even after being online several times since I did. I'll wait another week or two and if I get no response I'll cancel the order(s) and have one or two more for sale and reserve one for you.

Thanks! I also "breadboarded" the cable and tried all sync combinations and single sync lines, but I kept blanking connected all the time. Guess I could go back and try your suggestion, but I'm pretty content with my current setup, including audio on pin 1, too, which needs a separate connector (or even cable) on the 1084S. BTW I noticed that the Sophia PCB does not fit well in a fully socketed 800XL. It's at a bit of an angle because of the 74LS158 right above it. It only touches the IC housing though, so it doesn't make any shorts. If you add a precision socket to increase the height you can clear the '158, but then it touches the keyboard and the casing won't close properly. For now, I have it plugged in at a slight angle, but I'm thinking about removing the 158's socket.

I got DB9-->SCART working on that Phillips CM8802 monitor. Great picture quality!

Okay, fair enough. I have tried feeding the right signals on the right pins to the 1084S and the problem remains. It might be just my monitor though, so I'll move to my Phillips CM8802, which has a SCART connection. I'll keep you posted.

I see. I went by what you said earlier: Guess I have to cut the cable then and rewire

Got my cable in the mail today (1:1 DB9) and connected it to my 1084s. Sophia jumper 1 open or closed, jumper 2 open. I can see the blue background and the yellow letters, but it's rolling all over the place. Both horizontally and vertically. It seems there is no hsync/vsync. The housing of the monitor says there should be an RGB TTL/Analog switch, but there's no switch! I'm a little reluctant to open up the monitor to see if the solderpads are there :/ Edit: hmm, the 1084s without a switch should default to RGB analog (for the Amiga) It looks though as somebody dremeled a hole in the back and added the DB9 themselves. The hole looks fuzzy. Perhaps they also shorted the switch to RGB TTL for the C128? Sigh.... guess I have to open it after all or get another monitor. Measured the cable and all pins are connected correctly.

Exactly how did you work around this bug? I stumbled upon it once and just restarted the conversion.

I got mine the day before yesterday. Just ordered a straight-thru db9 cable for my 1084s!

Stephen measured 60.99mm, so I just ran $ units -1 "60.99mm" mil * 2401.1811 I figured that was close enough to 2400 on 100 mil grid. So instead of rounding up to 61mm, it was actually 0.03mm shorter I just held a perfboard along the ECI connector of the 130XE that I'm currently fixing and all the pins line up perfectly. The whole connector pair is 3000 mil.

That's probably 2400mil (60.96mm)