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About Attil@

  • Rank
    InsanelyMac Protégé
  • Birthday 09/11/1989

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  • Location
    Nove Zamky, Slovakia
  • Interests
    electronics, computers, music
  1. PC start-up chime

    Juan Luis: the usage is fairly simple. You build it, then you connect the X1-1 and X1-2 connectors to your amp. You can connect JP1 with the reset switch on the front of the computer and JP2 to the motherboard, to the pins, wher the reset button would usually go. You can get +5V from the floppy connector (red wire). R16 has to be set to appr. 43kOhm to give 16kHz sampling rate. I've found an error in the schematic. R1 to R8 are 20kOhm resistors and R9-R15, R17 are 10kOhm resistors. Sometimes is hard to obtain 20kOhm resistors, so you can use two 10kOhm resistors in series or one 22kOhm resistor. The one thing that I will have to cure is the mixing with the soundcard's main output. I renember that older SB16 cards had a PC Speaker connection, that allowed to connect it to the motherboard. The sound was always on the output, even when the card wasn't initialized.
  2. PC start-up chime

    It's in the ZIP. You just have to rename macchime.bin to macchime.pcm and import it with an audio editing software, that can import raw PCM data. Then it should ask for the sampling rate, bit-depth and stereo /ono. It's sampled at 16kHz, 8-bit, mono. Also, I have a 16-bit version... ...and about the BIOS screen: sorry, I can't help That just changes the EPA logo not the full screen, right?
  3. Nice work! Can you post a pic of the rear side? Thx in advance
  4. G5 case repairing

    Hello! Where did you get it? I would like to buy one, but I don't know where to get one. I'm in Slovakia.
  5. PC start-up chime

    OK, I'm gonna release the schematic and the prepared EEPROM file. There are 3 files in the ZIP archive: schematic.png - the schematic drawn in Eagle 4.16. If you are interested in the Eagle files, write me. macchime.bin - the chime sampled at 16kHz, for 512kbit EEPROMs macchime128k.bin - same as macchime.bin, but padded with silence to fill a 1Mbit EEPROM (that I use) RENEMBER! You are giong to build this project at your own responsibility! I am not responsible for any damage caused by this circuit! PS: the chime is sampled from my Power Macintosh 8500/180 macchime.zip
  6. PC start-up chime

    I'm etching with ferrous chloride... and my friend had some... But I think I'll make an other board (single sided), because the routes are very thin on one side and I have a lot of work to correct them (they are interrupted).
  7. PC start-up chime

    OK... I'm exposing the bottom side now. Then comes the top side and I'll etch it
  8. PC start-up chime

    I'm going to make the PCB now. It's all prepared, so I'll inform you today if it's working, but it should be
  9. PC start-up chime

    OK... I bought the parts for the project and the PCB drawings are ready too! I think it will be ready tomorrow.
  10. PC start-up chime

    The circuit is designed, but I won't publish it till I haven't tested it. This is because I don't want to put here a non-working thing. bofors: No, thanks. I am an electronics hobbyist. I can't program very well. i1sam: it was just an idea. Old IBM computers (300GL series) had an option while flashing BIOS to change the startup screen. But I didn't see this thing since then.
  11. This is how it looks 3 days after the installation.
  12. [HowTo] Intel GMA 900 (for 915GM and 910)

    Hi all! I have 10.4.6 and GMA900, but CI and QE does not work. Here is what I get in System Profiler: Intel Graphics Media Accelerator 900: Chipset Model: GMA 900 Type: VGA-Compatible Controller Bus: Built-In VRAM (Total): 128 MB Vendor: Intel (0x8086) Device ID: 0x2582 Revision ID: 0x0004 Displays: Display: Status: No display connected BenQ FP51G: Resolution: 1024 x 768 @ 75 Hz Depth: 32-bit Color Core Image: Not Supported Main Display: Yes Mirror: Off Online: Yes Quartz Extreme: Not Supported The device ID is also correct. Then what is the matter?
  13. PC start-up chime

    When the power goes on, the circuit plays the sound. In this state I have the drawing it will play looped, so I'll need some timing circuit or something similar. amdprophet: Yes, you can play an other sound, but it has to be mono 8-bit PCM raw data regardless to the sampling rate. But it has to fit in the EEPROM. I used the 16kHz sampling rate and the whole thing fits into 54KB. I just have to hack my BIOS to show an Apple bootscreen now
  14. PC start-up chime

    I've found a great circuit on the net that can play back WAV data from an EEPROM. I've got the idea to make a Mac-styled start-up chime player for my PC. I recorded the chime from my old PowerMac 8500 and did all the editing. It's ready to be programmed into the EEPROM, what I cannibalized from a broken P2 MoBo. I'll tell more details when it will be finished, because I can't make a PCB and program the EEPROM at home, only at my friend, but he will have time for me on monday or tuesday. Are you interested in this?
  15. Wondering if my hardware is compatible.

    Hi all! I'm new to this forum, but it's very good! I'm dumb to the MacOS X86 thing, I've used MacOS on Mac (PM8500/180) and Windows on PC. My question: is my HW compatible? My setup: - Microstar 645 Ultra-C motherboard with SiS 645 chipset - 2,4 GHz Celeron CPU (Northwood core, 400MHz FSB, 128KB cache) - 768 MBytes of RAM (2x V-DATA, 256+512MB, 400MHz) - 80 GB Maxtor HDD, 7200 rpm, 8MB cache - Microstar GeForce FX5200 128MB - LG LSA-4166 DVD-RW - SoundBlaster Audigy 4 - 3Com ethernet card (3C905TX) - Pinnacle PCTV Pro TV tuner - USB 2.0 card with 5 ports, based on NEC chip hope, I didn't forget anything to mention Will it run OSX86? Or better to forget it? Thanks in advance for help! Attila Slovakia