Cisano Posted October 19, 2022 Share Posted October 19, 2022 Hi to everyone. This is my last game. I have seen on the ZPH show, the game has a problem with Sync, I think. On Stella in dev mode it works great. Not having the real hardware for the test, can someone tell me what kind of problem is? Source code here Thanks. Cisano Invaders From Andromeda BETA V0.9 - by Cisano - 2022 - NTSC.bin 1 Quote Link to comment Share on other sites More sharing options...
alex_79 Posted October 19, 2022 Share Posted October 19, 2022 VSYNC timing is off. You should enable/disable it at the very beginning of a scanline (that is, right after a "sta WSYNC"), so to have three full scanlines with VSYNC on. Instead, you're enabling it at cycle 31 on line 259, and disabling it at cycle 5 on line 262/0. Rearrange the code to strobe WSYNC right before VSYNC, or just use the "VERTICAL_SYNC" macro that's in "macro.h" 1 Quote Link to comment Share on other sites More sharing options...
Cisano Posted October 19, 2022 Author Share Posted October 19, 2022 Thanks. I hope to have understood. This is the new bin file. Let me to know. Thanks. Invaders From Andromeda BETA V0.91 - by Cisano - 2022 - NTSC.bin 3 Quote Link to comment Share on other sites More sharing options...
+SpiceWare Posted October 19, 2022 Share Posted October 19, 2022 I tested the ROMs but the sync issue doesn't show up on my display with the initial ROM you posted, so I can't tell if it's fixed or not. I believe it showed up on ZPH because they're using an RGB modified 2600, so they can capture the video for streaming, so best bet would be to get @ZeroPage Homebrew to test it for you. Do note that this issue occurs with many older games, such as the ever popular Warlords for which I posted a fixed ROM: @ckrtech also did an in-depth video about the problem that you might find enlightening. Quote Link to comment Share on other sites More sharing options...
+SpiceWare Posted October 19, 2022 Share Posted October 19, 2022 I've opened up issue #940 to have Stella show similar screen jumps in Developer Mode if VSYNC is done incorrectly. 1 Quote Link to comment Share on other sites More sharing options...
Thomas Jentzsch Posted October 19, 2022 Share Posted October 19, 2022 @Cisano: Set Jitter/roll sensitivity to 10 to be safe for even the most sensitive hardware. 1 Quote Link to comment Share on other sites More sharing options...
alex_79 Posted October 19, 2022 Share Posted October 19, 2022 (edited) The first rom shows very minor jitter on the CRT I use. The screen jumps up and down 1 scanline about once per second in the title screen, and about twice as fast during gameplay, but without showing color loss. The second rom is stable. Edited October 19, 2022 by alex_79 1 Quote Link to comment Share on other sites More sharing options...
+SpiceWare Posted October 19, 2022 Share Posted October 19, 2022 22 minutes ago, Thomas Jentzsch said: @Cisano: Set Jitter/roll sensitivity to 10 to be safe for even the most sensitive hardware. Didn't realize that setting would reveal this bug. When set to 10 version 0.9 rolls the picture: While version 0.91 is stable. Quote Link to comment Share on other sites More sharing options...
Cisano Posted October 19, 2022 Author Share Posted October 19, 2022 (edited) Thanks to everyone. I'll use Stella with Jitter/roll to 10 in the future. Seems all ok now. Edited October 19, 2022 by Cisano Quote Link to comment Share on other sites More sharing options...
jetset Posted October 19, 2022 Share Posted October 19, 2022 Great job! Looks very cool. Quote Link to comment Share on other sites More sharing options...
Cisano Posted October 19, 2022 Author Share Posted October 19, 2022 30 minutes ago, jetset said: Great job! Looks very cool. Thanks Quote Link to comment Share on other sites More sharing options...
+Al_Nafuur Posted October 19, 2022 Share Posted October 19, 2022 11 hours ago, Cisano said: Hi to everyone. This is my last game. I have seen on the ZPH show, the game has a problem with Sync, I think. On Stella in dev mode it works great. Not having the real hardware for the test, can someone tell me what kind of problem is? Source code here I wanted to play on my PAL setup, so I added NTSC/PAL60 color switches to my fork here @Cisano if you like I can open a pull request with the PAL60 changes. PAL60 version V0.91:InvadersFromAndromedaBETAV0.91-byCisano-2022-PAL60.bin 1 Quote Link to comment Share on other sites More sharing options...
Cisano Posted October 20, 2022 Author Share Posted October 20, 2022 1 hour ago, Al_Nafuur said: I wanted to play on my PAL setup, so I added NTSC/PAL60 color switches to my fork here @Cisano if you like I can open a pull request with the PAL60 changes. PAL60 version V0.91:InvadersFromAndromedaBETAV0.91-byCisano-2022-PAL60.bin First time I see this. How the switches work? About pull request, I don't know what exactly is. I must read something about it. Anyway SpiceWare is working on PAL version. Quote Link to comment Share on other sites More sharing options...
+Al_Nafuur Posted October 20, 2022 Share Posted October 20, 2022 15 minutes ago, Cisano said: First time I see this. How the switches work? it's basically the color constants from @Random Terrain's batariBasic page here: https://www.randomterrain.com/atari-2600-memories-batari-basic-commands.html#color_constants_ntsc_pal60 I have moved them to the asm include file "NTSC_PAL_colors.h" where they could be switched with the "IS_NTSC" constant. Afterwards all color hex values in the code have to be converted to the constants (e.g. $32 to _32) 15 minutes ago, Cisano said: Anyway SpiceWare is working on PAL version. PAL or PAL60 ? 1 Quote Link to comment Share on other sites More sharing options...
+SpiceWare Posted October 20, 2022 Share Posted October 20, 2022 1 hour ago, Al_Nafuur said: PAL or PAL60 ? PAL60, done using color name constants like I described here. I find using color names to be more useful when reading the code: lda #GREEN+4 sta COLUP0 lda #VIOLET+8 sta COLUP1 I sent it to Cisano a little while ago, with some other coding tips. 3 Quote Link to comment Share on other sites More sharing options...
JetSetIlly Posted October 20, 2022 Share Posted October 20, 2022 17 hours ago, Thomas Jentzsch said: @Cisano: Set Jitter/roll sensitivity to 10 to be safe for even the most sensitive hardware. What do the numbers 1 to 10 refer to in the sensitivity setting? Is it just a scale? Quote Link to comment Share on other sites More sharing options...
alex_79 Posted October 20, 2022 Share Posted October 20, 2022 In my programming attempts, I usually put the switches to build different versions inside an IFNCONST statement. In that way you can pass their value from the command line (using the -D option) without editing the source each time, and if you omit it, the one defined inside the statement will be used as default. By using a script/batch file, you can build different versions at once. e.g., if in your source you have IFNCONST PAL PAL = 0 ;0=NTSC 1=PAL ENDIF You'll build the NTSC version by default, and the PAL version if you use the "-DPAL=1" option from the command line (or in a script). 2 Quote Link to comment Share on other sites More sharing options...
Thomas Jentzsch Posted October 20, 2022 Share Posted October 20, 2022 1 hour ago, JetSetIlly said: What do the numbers 1 to 10 refer to in the sensitivity setting? Is it just a scale? Yes. There are several parameters considered here. Quote Link to comment Share on other sites More sharing options...
Cisano Posted October 20, 2022 Author Share Posted October 20, 2022 14 hours ago, Al_Nafuur said: PAL or PAL60 ? PAL60. Downloadable in the new post of the forum. Quote Link to comment Share on other sites More sharing options...
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