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a8isa1's Photo


Member Since 15 Apr 2006
OFFLINE Last Active Today, 5:27 PM

#3966235 Images generated by RastaConverter

Posted by a8isa1 on Sun Feb 18, 2018 5:53 PM

Ang-Ka National Forest. 59 colors.


Deciduous Forest. 54 colors.

Not sure which is which but the one on the left almost knocks off your Le Mans picture as my favorite.



#3963333 Images generated by RastaConverter

Posted by a8isa1 on Thu Feb 15, 2018 12:03 PM

Stargate SG-1 Prometheus38 colors.



The Le Mans pic remains my overall favorite conversion. However, this is another pic that looks like it might have been done by a pixel artist specifically for A8.  It is my favorite in this vein.  Kudos!

#3959394 Analmux passed away

Posted by a8isa1 on Sun Feb 11, 2018 10:15 AM

Very sad news  :(


RIP analmux

#3957692 Atari's Plato Cartridge question

Posted by a8isa1 on Fri Feb 9, 2018 1:02 PM

I patched the ROM image for 2400 baud but the "1200 baud" message was annoying me.   Here's a patch of the patch of the patch.



Attached Files

#3956630 Atari's Plato Cartridge question

Posted by a8isa1 on Thu Feb 8, 2018 11:06 AM

Having a problem with both versions of the hacked ROM: when in the "Bigjump" and using the + key to scroll down the list, it always bails out at the point shown below, prints the text "OK" off to the left side of the list, and then Altirra's connection status changes to "(in command mode)". At that point I can do nothing but reboot and start over. I can type text, but nothing seem to have any effect on the mode I'm stuck in.


attachicon.gifbigjump problem.png


Until Phaeron adds his update for this you can type ATO and ENTER.  This resumes the session (here and with most 'AT' modems).

#3954932 Altirra 3.00 released

Posted by a8isa1 on Tue Feb 6, 2018 2:53 PM

Phaeron, I'm having a problem with Altirra-3.10-test6.   I'm using linux/wine/Altirra so I'm not sure it's Altirra's issue or not.


While using RVerter emulation when I attempt to make a connection I get an Altirra minidump (enclosed).




I've gone back as far as 2.99 test 25.   The issue exists there as well.


I don't have the same problem using Atari 850 emulation


Sorry, I didn't test this combination long ago.

Attached Files

#3954610 While driving yesterday...

Posted by a8isa1 on Tue Feb 6, 2018 8:20 AM

I wonder what "Blue October" is?  I had friends in a band in the 80's called Red October,...But these days you never know...I'd hope it's a band but it could just as easily be a store, a bar, a video game, a micro brew...

Could be this Blue October


Sorry, I don't know how to embed video links.


What a song, btw!

#3952274 Atari's Plato Cartridge question

Posted by a8isa1 on Sat Feb 3, 2018 11:53 AM

In Altirra 3.00




Select "850 Interface Module"


Click Settings and make sure "Full - SIO Protocol and 6520 R: Handler" is enabled. Click OK.


Under 850 Interface Module-->Serial Port-->  click on "(no attached devices)" and add Modem


Click Settings.  "Emulate Telnet Protocol" and "Allow outgoing connections" should both be enabled.  Click OK


and Click OK again


If you haven't already done so select File-->Attach Cartridge and choose the Atari Learning Phone cartridge (PLATO).


The cartridge should boot to an amber/greenish screen with the words, "WELCOME TO THE LEARNING PHONE". 


If the 850 interface and the simulated modem have been setup you should see "1200 baud".  You can then type "ATDICYBERSERV.ORG 8005" and ENTER.   Typed charcters will echo twice. [EDIT] If it's not setup correctly you will see "Microbit 300 baud"


You should see "Press NEXT to begin".   I usually just tap ENTER a few times.


Screen will go blank for about a minute before the Cyber1 signon appears.

#3951812 Images generated by RastaConverter

Posted by a8isa1 on Fri Feb 2, 2018 7:22 PM

24 Heures du Mans. 56 colors.

This is my favorite to date!

#3950858 Atari's Plato Cartridge question

Posted by a8isa1 on Thu Feb 1, 2018 7:11 PM

Thanks to Joe_z and Altirra I got to see Atari Learning Phone running.  Something I've wanted since I sat in on a static presentation back in the mid '80s.


Sorry, I can't show much.  I don't have an account.  However, this little bit made me happy.   Thanks Joe!





Joe_z mentioned that some of the terminal code sequences don't appear to be right.  There's also the need to connect to the port that supports color even though Atari Learning Phone has only 2 colors.


The screen shown above is a window to the 512x512 frame.  There's also a scaled mode (below).



#3947085 (Noob question) Atari800 + ATR8000 and floppy.

Posted by a8isa1 on Sun Jan 28, 2018 2:54 PM

There's a quick test you can do to see if the ATR8000 has booted.   From BASIC type LPRINT.  


If you get READY without an error then the ATR8000's printer spooler function is running.


If you get error 138 then the Atari is not getting a response from the ATR8000.


Things you need to do with an ATR8000.  


- floppy drive should have drive termination set, usually a resistor network (DIP or SIP) but sometimes via a jumper.

- drive select jumper should be set to DS0

- cable should be a straight through. There shouldn't be any wires flipped as with a PC AT's floppy cable

- floppy drive should be powered before the ATR8000 is powered.   A disk must be in the drive when the ATR8000 is powered.   ATR8000 will not register a disk otherwise, strangely [edit] *sometimes* not even when RESET (on the back of the ATR8000) is pressed.

- powering the ATR8000 (or pressing the ATR8000's RESET button) should cause the floppy drive to spin.

#3941333 16K cartridges on 400/800

Posted by a8isa1 on Sun Jan 21, 2018 6:53 PM

400/800 OS checks memory location $9FFC to see if it is 0, if it is, it attempts to run the cartridge at $9FFE, $9FFF.

Ah.  I didn't know that's what was being checked.


When I had an SRAM cartridge, which was fixed at 16K, I had trouble running 8K images.   I discovered if I mirrored the data of $BFFA-$BFFF to $9FFA it would work.


Only posting because my experience seems to confirm what you are seeing

#3929565 SIO Wifi modem with esp8266

Posted by a8isa1 on Sun Jan 7, 2018 2:12 PM

I've had good success with NodeMCU dev boards using Strikelink and Zimodem 3.0 firmwares (links below).


Both firmwares work well.  Both have telnet modes. Zimodem has the ability to answer. (EDIT - I haven't tested this aspect).


I'm still playing at this.  I didn't add RS232 level conversion. I just connected the boards' TX, RX and GND lines (so far) to SIO.  Power is via USB Phone charger.


I've been using the bobverter driver on the Atari but I'm not sure how to add RVerter logic. Since I don't have a real R: interface set up and the device just sits on the SIO bus I can't do disk I/O unless I'm using my internal MyIDE (with SDX 4.49c beta).



DIY C64 Wifi Modem

Zimodem 3.0

#3924977 Images generated by RastaConverter

Posted by a8isa1 on Mon Jan 1, 2018 4:56 PM

Playmates. 66 colors.

Protective Mother. 56 colors.


These are amazing, especially the one on the right!


And, once again they look like art made for the A8 vs the converted pictures that they are.

#3924940 Images generated by RastaConverter

Posted by a8isa1 on Mon Jan 1, 2018 3:57 PM

My 2 cents regarding filters (/filter=).   Use catmullrom.   All others make the destination look as if soft focus has been used.


I use a details mask a lot but you might be surprised how I use it.   I don't always mask areas of a picture where I want details to come through.   Sometimes a conversion seems to get stuck. Ugly problems appear and no amount of processing seems to correct it. In such a case I use a mask to select the trouble spot(s) on the picture so that hopefully those area get extra processing.


For example, the Christmas Hearth pic that I converted would get banding every time.   The bands showed themselves in the brick areas left and right of the flames. I used gimp and edited output.png. Here's what I do.


I create a second layer and make it all black.  I then overlay this layer.  I do this so I can paint on the black layer yet a visible indication shows in the composite picture.  Finally I delete the original layer which leaves just the black and white mask. It's alot easier than painting a white mask over a picture and then later painting the rest of picture black.