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alex_79

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Everything posted by alex_79

  1. Thank you! I will try it on one of my consoles.
  2. Nice mod! :thumbsup: Do you think the circuit will work with a 74HCT00 instead of 74LS00? How much difficult would be to disable audio and video when the game is paused like on the Onyx Junior console?
  3. I made a more readable schematic of the adapter a while ago. (But I haven't built one cause i do not have a sega controller yet) Hope it helps. Moreover, here you can find different schematics to use a genesis controller on the 7800.
  4. According to this document, genesis gamepads have pull-up resistors so that they output a digital 1 when a button is not pressed.
  5. It's stored within the account. You can delete your card information after the purchase, however. (See the link in my previous post)
  6. You must have an account, but you can keep your email address private. From the Google Checkout help:
  7. My previous post wasn't clear (My english isn't very good). I meant that I don't need to use the harmony on the clone console. Of course if the mod doesn't affect the functionality of the cart you can send me the modded one.
  8. Yes, I ordered an Harmony cart, but I don't need the mod. I was just curious because I have one of those clone console, but I also have a few standard Atari 2600 and I plan to use the Harmony on my PAL junior with s-video output. Thank you!
  9. Hi! Will the harmony/melody work on atari 2600 clones with built-in games? These consoles usually have a pullup resistor on pin 24 of the cartridge port used to detect if a cart is present. Will this damage or erase a melody/harmony cart? If not, will the console detect the cart? Here is a schematics of a clone console I found:
  10. Hi! I fixed a PAL 7800 with a broken rf modulator using this mod and I can confirm that it works fine on PAL machines. I couldn't use the PAL schematics here on AtariAge because they refers to a different revision board than mine, but I found the right one on this site. There are some errors but I was able to identify the video circuit component on my console. I used the instructions on post #14 for the video part and those on post #90 for the audio. The brightness was ok, so I didn't change the resistor in the luma circuit, while there were some slight interferences in the video in the form of diagonal lines which disappeared after cutting the base of the audio oscillator transistor. There's still some video noise in 7800 mode. The mod described here will probably fix the problem but I haven't tried it because I basically use the console for 2600 games only. Here are some pics to help identify the components on the board and the procedure I used: - remove resistor R62 (or cut one of the lead). - cut the 4 pins of the rf modulator. The 3 pins from the bottom are Ground, Power (+5V) and Video. - desolder or cut only the right ends of R33 and R32 from the board, then solder them together and connect to the center pin of the audio rca jack. - build the circuit posted by puppetmark on post #14 and connect it to the board and to the video rca jack. - connect the ground wires to the outer housings of the rca jacks - cut the base of Q8 transistor or remove it (optional. reduces interferences in composite video). I hope this can help people to mod their PAL consoles. P.S. sorry for my bad english.
  11. In Phoenix the left difficulty switch is used to enable/disable the background sounds.
  12. The problem is that the synthcart uses the TV TYPE switch which on SECAM VCS is wired differently than NTSC or PAL. If you look at the schematics, you'll see that on PAL and NTSC VCS the 5 switches on the console (TV TYPE, LEFT and RIGHT DIFFICULTY, SELECT and RESET) are connected to 5 lines of the I/O chip, so that their state can be read by the software which then takes the action it was programmed to take. On the SECAM VCS the pin of the I/O chip which should connect the TV TYPE switch is hardwired to ground (from the software point of view the switch is always in B&W position), while the actual switch on the console is connected to the video circuit so that in the B&W position the color in the video signal is turned off. If you have some skills in electronics you could mod your console to have a proper TV TYPE switch. You have to install a simple on-off switch somewhere on the case connected between pin 21 of the 6532 chip and ground (you must cut the existing connection between that pin and ground first). Else you must buy a PAL or NTSC console to use the synthcart.
  13. While the game is running hit TAB, then select "Game Properties". On the "Controller" tab you can change the controllet port used by each player. Then you must reload the game (with ALT+R) for the change to take effect.
  14. With the old software I used the "print topic" feature a lot to save a pdf version of interestring threads (using a virtual pdf printer) and I like the addition of the "download" option on the new forum that allows to save the topic as html or word document. Unfortunately the Print/Download option is limited to the first 300 posts of a thread (It worked in this way with the old board software too). It would be nice to remove this limit and maybe to add the option to specify a range of posts to be printed/downloaded. Adding the pdf format in the download option would be nice too. Thanks for all the work you put on AA!
  15. I have that cart and It says 7800 on the end label. The game is in PAL format. Here's a pic:
  16. This is obviously a bug; it's supposed to work as you say. The requirement for OpenGL 2.0 is only for the filters, not for general OpenGL support. I'll look into it tomorrow. I'm using Linux, and I have an ATI Radeon 9000 video card with opengl 1.3 support. I can't use the TV filters but the opengl renderer works fine (As it did with older versions of Stella).
  17. He says to click on "pay now" and follow instructions to pay with paypal, then he gives some information needed to pay with the other methods he accepts (but those are not available for international buyers). Finally he ask you to confirm your address (if differs from the one in your ebay profile) and to use only the ebay message system to communicate with him instead of sending mail directly to his e-mail address. Sorry my english is not good. I hope this helps.
  18. Yes, emulators require multiload supercharger games to be concatenated in a single file. Note that Party Mix is NOT a multiload game: the three parts are actually separate games. If you concatenate them in a single file you will only be able to play the first one.
  19. It's NTSC. This is how a PAL 4-switch board looks like: Note that it has 2 oscillators (those circled in yellow in the picture), while NTSC only has one. I agree you should try to adjust the color pot as suggested by Benzman66.
  20. From your description, it seems that the console is PAL and that you have a multistandard TV set which accept PAL through RF. Look at these screenshots: NTSC Galaxian on PAL console (this one looks very similar than on NTSC console): NTSC kung-Fu Master on PAL console: NTSC Boxing on PAL console: NTSC River Raid on PAL console: You should open the console and post picture of the board to be sure about that.
  21. I agree. I too used common panel-mount push buttons on one of my Jr. to replace the broken mylar strip.
  22. Nice! what about using joystick up/down directions to select next or previous color?
  23. I tried the rom on real hardware (Supercharger + PAL 2600) and it is great! :thumbsup: There's still some problem with the title screen though. It doesn't roll on my tv but the upper part of the image it's distorted. I think the problem is that VSYNC it's turned off at scanline 46 in the title screen (during normal play it happens on line 2). Here's the z26 log file: Loaded ROM: data/atari/roms/homebrews/Exidy_Circus(Final).bin (Frame Line Cycle Clock) (P0_Pos P1_Pos M0_Pos M1_Pos BL_Pos) flags A X Y SP Code Disasm title screen: ... ( 15 262 0 -68) ( 98 106 8 2 2) nvbdIzc 30 00 ff ff f14c: a9 82 lda #82 ( 15 262 2 -62) ( 98 106 8 2 2) NvbdIzc 82 00 ff ff f14e: 85 02 sta WSYNC ( 15 263 0 -68) ( 98 106 8 2 2) NvbdIzc 82 00 ff ff f150: 85 01 sta VBLANK ( 15 263 3 -59) ( 98 106 8 2 2) NvbdIzc 82 00 ff ff f152: 85 00 sta VSYNC <--VSYNC ON ( 16 1 6 -50) ( 98 106 8 2 2) NvbdIzc 82 00 ff ff f154: 85 02 sta WSYNC ( 16 2 0 -68) ( 98 106 8 2 2) NvbdIzc 82 00 ff ff f156: c6 a9 dec a9 ( 16 2 5 -53) ( 98 106 8 2 2) NvbdIzc 82 00 ff ff f158: 10 08 bpl f162 ... ( 16 45 14 -26) ( 98 106 8 2 2) nvbdIZc 00 00 ff ff f089: d0 fb bne f086 ( 16 45 16 -20) ( 98 106 8 2 2) nvbdIZc 00 00 ff ff f08b: 85 02 sta WSYNC ( 16 46 0 -68) ( 98 106 8 2 2) nvbdIZc 00 00 ff ff f08d: 85 00 sta VSYNC <--VSYNC OFF (line 46) ( 16 46 3 -59) ( 98 106 8 2 2) nvbdIZc 00 00 ff ff f08f: 85 02 sta WSYNC ( 16 47 0 -68) ( 98 106 8 2 2) nvbdIZc 00 00 ff ff f091: 85 02 sta WSYNC ( 16 48 0 -68) ( 98 106 8 2 2) nvbdIZc 00 00 ff ff f093: 85 02 sta WSYNC ( 16 49 0 -68) ( 98 106 8 2 2) nvbdIZc 00 00 ff ff f095: 85 01 sta VBLANK ( 16 49 3 -59) ( 98 106 8 2 2) nvbdIZc 00 00 ff ff f097: a0 94 ldy #94 ( 16 49 5 -53) ( 98 106 8 2 2) NvbdIzc 00 00 94 ff f099: 84 06 sty COLUP0 ( 16 49 8 -44) ( 98 106 8 2 2) NvbdIzc 00 00 94 ff f09b: 84 07 sty COLUP1 ( 16 49 11 -35) ( 98 106 8 2 2) NvbdIzc 00 00 94 ff f09d: a2 27 ldx #27 ( 16 49 13 -29) ( 98 106 8 2 2) nvbdIzc 00 27 94 ff f09f: 20 00 f0 jsr f000 ... game: ... (195 263 0 -68) ( 77 36 5 65 38) nvbdIZc 00 0c 02 ff fa09: a9 82 lda #82 (195 263 2 -62) ( 77 36 5 65 38) NvbdIzc 82 0c 02 ff fa0b: 85 01 sta VBLANK (195 263 5 -53) ( 77 36 5 65 38) NvbdIzc 82 0c 02 ff fa0d: 85 00 sta VSYNC <-- VSYNC ON (196 1 8 -44) ( 77 36 5 65 38) NvbdIzc 82 0c 02 ff fa0f: 4c 65 f1 jmp f165 ... (196 2 18 -14) ( 77 36 5 65 38) nvbdIZc 00 0c 02 ff f1af: a9 f0 lda #f0 (196 2 20 -8) ( 77 36 5 65 38) NvbdIzc f0 0c 02 ff f1b1: 24 3d bit INPT5 (196 2 23 1) ( 77 36 5 65 38) NvbdIzc f0 0c 02 ff f1b3: 85 00 sta VSYNC <-- VSYNC OFF (line 2) (196 2 26 10) ( 77 36 5 65 38) NvbdIzc f0 0c 02 ff f1b5: 30 01 bmi f1b8 ...
  24. Hi! Thanks for the update. Haven't found any problem so far and I like the improvements in the GUI! I downloaded the new minigame Doris and I was thinking it would be nice if 1k roms could be run without doubling them to 2k. Maybe Stella could use a single "no bankswitch" format for roms <= 4k: If the rom is <= 4k and size is a power of 2, then it is mirrored to fill the 4k cart address space. (if size is 2^n, then it is mirrored 12-n times, because there are 12 address lines to the cart port and the rom only uses 'n' of them). This is what happens with "plain" carts only consisting in a rom chip without added logic, like original 2k games. A 1k rom would have 10 lines connected and would be mirrored 4 times. Smaller sizes would be theorically possible, if anything useful could be programmed for the 2600 in 512 bytes or less...
  25. Probably your cart is in PAL format. This screenshot shows how a PAL bump'n'jump will look on a NTSC console.
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