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mdanh2002

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  1. mdanh2002

    Dove Fastnet SE Extension\Software

    Did you ever find the driver for this card? I also have the same card and couldn't find the driver. See my thread here https://68kmla.org/forums/index.php?/topic/54757-driver-for-dove-fastnet-se-nic/
  2. mdanh2002

    Driver for Dove FastNET SE NIC

    Hi, I have a Macintosh SE with a Dove FastNET SE NIC card installed but couldn't find the driver for it anywhere. This is what I've gathered about this card: 1. The card was manufactured by Dove Computer Corporation (https://fccid.io/HY7) whose main business is network/telecommunication equipments 2. The card belongs to a family of similar NIC for 68k Macintoshes. The FastNet SEn is for the Mac SE whereas the FastNet SE/30s is for the SE/30. See details here https://archive.org/stream/TNM_Ethernet_connectivity_products_Fast_Net_-_Dov_20171214_0072/TNM_Ethernet_connectivity_products_Fast_Net_-_Dov_20171214_0072_djvu.txt 3. There is a driver (DoveEthernetkaart.sit) from http://vintageapple.org/macdrivers/network.shtml for the SE/30 version of the card. However, the file seems to be corrupted and can't be opened with any version of StuffIt Expander. There was a thread on this forum https://68kmla.org/forums/index.php?/topic/28834-dove-fastnet-se-extensionsoftware/ where somebody encountered exactly the same issue, with no replies. The same file found on other mirrors is also corrupted! The archive CD for Mac Driver's Museum found here https://www.macintoshrepository.org/8258-mac-drivers-museum-archive-1990-2003- also contains the same corrupted file! 4. I found an old list (ftp://ftp.uni-potsdam.de/pub/systems/mac/Help/abs/comm.txt) which mentions dove-fastnet-3-amd.hqx and dove-fastnet-3n-nat.hqx being the drivers for the FastNET III with the AMD and National chipsets respectively, but these files cannot be found anywhere online. At one point (around May 1993) these files were posted to the newsgroup com.sys.mac.digest and available on the InfoMac archive. The current archive https://archive.info-mac.org/ does not contain these files, and nor does the 1994 CD-ROM release (https://archive.org/details/Info_Mac_IV_CD-ROM_Pacific_HiTech_Inc._August_1994). It was posted to "comm/net" in the archive, which was probably renamed to "comm/inet" later, with many files removed. If anyone has the driver for this card, let me know. Thanks a lot!
  3. mdanh2002

    troubleshooting PowerBook LCD backlight issues

    The 190cs only has this problem when it boots from the hard drive. It does not exhibit the issues when booting from the floppy disk. And the problem always happens shortly after the "Welcome to Macintosh" text is displayed (backlight is turned off, making it very hard to see the screen). Something I observed today is that, if the problem happens, a PRAM reset (Command-Option-P-R) will restore the backlight to working condition again on the 190cs. I will take it apart this weekend and check again for leaky caps and see what I can find. For the 165, its backlight will always turn off around 5 seconds after power is applied, regardless of whether there is a boot disk. The PRAM reset trick does not solve the problem on this machine. On a side note, I have a 5300cs that works fine but does not accept CF cards. Drive Setup Lite always says "Disk Initialization Failed" when running on CF card (the card is detected with the correct capacity). I have tried various CF cards with the same results. When running on a traditional IDE hard drive, everything works fine. My 190cs does not have such issues. This is strange.
  4. mdanh2002

    troubleshooting PowerBook LCD backlight issues

    It could be caps on the 165. However I am reluctant to open it, since the cable between the LCD and the motherboard is 'almost' broken and I do not want to risk ruining it. For the 190cs, I doubt so. I checked the inverter board and it looks very clean, almost like the day it left the factory. I measured most caps on the LCD boards using an ESR meter and they seem to be fine. I also swapped the inverter board with another Powerbook 5300cs that I have whose LCD is cracked, and the same symptoms persisted. The symptoms did not happen when the swapped inverter board was on the other Powerbook, the backlight there could remain on for the whole day with no issues.
  5. Hi, I have a Powerbook 190cs and a Powerbook 165 that are having weird backlight issues. On both laptops, upon power on, the backlight will lit up for a while (5-10 seconds), then turns off. With this, I can still use the 165 since the screen is B&W, whereas the 190cs with color screen is totally unusable without the backlight. However, strangely on the 190cs, if I do not power it on for around 2-3 days, the LCD backlight will work fine for around 2-3 hours once it is turned on before the problem will happen again. Once the problem happens on the 190cs, I have to let it rest for a while before retrying. On the 165, the backlight symptoms are persistent and will not change regardless of how long I let it 'rest' before powering on. On the 165, the issue happens regardless of whereas the machine boots from floppy or HDD. On the 190cs, the issue does not happen with floppy boot but only when booting from the hard disk drive. The 190cs has the PRAM battery removed, if that matters. (I have another 5300cs which also has the PRAM battery removed, but does not exhibit such symptoms) The 190cs is on System 7.6.1 and the 165 is on System 7.5.5. I guess the backlight hardware is most likely ok, since it works fine for a while when power is applied. It is also not a loose cable issue since I did not touch the cables when the problems happen. Any thoughts?
  6. mdanh2002

    troubleshooting SE/30 motherboard

    I tried shimming with no effects. I realize that if it's going to work, just a standard socket insertion would do and no additional press/shimming is required on the module. If it's not going to work, shimming isn't going to help either. Anyway the board failed on me again today (horizontal stripes on the screen with chime of death). This happened for both the stock and the BMOW ROMs. My suspicion now falls on the power supply. I just ordered another fully working Macintosh SE from eBay today. When it arrives in a few weeks' time, I will swap the motherboards and see if it's indeed a motherboard issues. On a side note, what do you do with your 68k Macs once you have repaired them? For me, the most excitement (and also the most time spent) happens during the repair/setup phase. Once I've managed to do that, it'll be like "oh, cool", and that's it The same machine will only be turned on again once in a while for testing. I don't feel like opening a working Mac to tinker around, for there is always a risk that I would mess something up. But if I don't play with them, it will be sitting there doing nothing. Over the past 2 years since I started to play with vintage Macintosh, I have acquired quite a few machines (2 SEs, 2 SE/30, 2 512k, 1 Plus, 3 color Powerbooks and 7 B&W Powerbooks). I am thinking to resell some of them to get back some of the money spent. Here in Singapore a compact B&W Mac, with keyboard and mouse, in working condition, can fetch around US $300 if sold locally. A working vintage Powerbook can get you around US$150. But if I do this, I will feel somewhat bad since I no longer have machines to play with.
  7. mdanh2002

    troubleshooting SE/30 motherboard

    I still think it's got to do with the RAM modules, or the circuits surrounding them. I did run a thorough test on all of the 16MB SIMMs using the SIMCHECK II RAM tester, and all tested good, which is expected since they are new. I suspect one or more of the 74F253 multiplexers are dying and producing marginal outputs not tolerated by the Rominator II. When I am free I will use my oscilloscope to examine the voltage levels at their output pins to see what's going on. Unfortunately the SE/30 motherboard and its CRT are not convenient to mess with. The logic board cable is very short, making it impossible to lay the board flat on the table and far away from the CRT with deadly voltages for easy troubleshooting. If it's an LC, or perhaps a Commodore or something, I will be more comfortable to play with it and see what is wrong. I just do not want to trash the CRT a second time.
  8. mdanh2002

    troubleshooting SE/30 motherboard

    The SE/30 works fine again with the stock ROM after a second wash of the logic board. I leave it running for the whole day today with no weird behaviour observed. Strangely it still doesn't work with BMOW Mac-rominator II (chime of death upon power on). I will have to investigate this on another day, after I get another SE/30 and see whether the new machine will work with the custom ROM. Maybe some marginal voltage or logic levels that are within the tolerance of the stock ROM, but not with the Rominator II.
  9. mdanh2002

    troubleshooting SE/30 motherboard

    The shrinking display is a different story - I will check the analog board on another day. The 6 or 7 socketed chips above the 8 RAM slots get hot together, so the shorts must be something common to all of them. I have tried to power the on with each individual chip connected and others removed, and yes, each chip individually will get hot. I do not think that the traces on the logic board are broken because if they are, the machine would not work at all. I did manage to install a full System 7.1 with tons on software on this machine before this happens. In my case the ICs get very hot and the machine would only stop working once the ICs get 'hot' enough. So maybe some short circuits somewhere. I also checked the my soldering work on this board and it seems OK. Interestingly, the problem only started to happen yesterday. If all fails, I will borrow a Flir thermal camera and use it with the logic board powered on and the socketed chips removed, to see where the short might be.
  10. mdanh2002

    troubleshooting SE/30 motherboard

    Hi, I recapped 2 SE/30 around 2 months ago. One of them still works fine, while the other has developed some weird problems. First, I notice that during operation, the PAL and video chips above the 8 SIMM memory slots are very hot, to the point of burning my hands. Secondly, the machine works fine with the original Apple ROM but not with the Macintosh Rominator II ROM (by BMOW) - it would show various stripe patterns or play the chime of death upon boot up. Finally, if left running for a while (30-60 mins) then the machine would no longer boot up with either ROM (chime of death is played). If this happens I will need to wait for a few hours before it will work again. I have washed the board again the second time but the symptom does not change. The other SE/30 which was recapped around the same time still works well. This is the list of what I have done to this SE/30, in case they are related: 1. Install 128MB of RAM (purchased from OWC) 2. Install the Mac Rominator Kit II from BMOW. The custom ROM worked fine at first, and only started to show the above problem yesterday. 3. Adjust the trimmer on the analog board for the CRT vertical width to better fit the screen as the original display is a bit small. I am well aware of the overscan design of the original Mac, to make the screen WYSIWYG with 72 dpi printout, hence I still leave some black borders at the top and the bottom. With this, the new CRT image did not fit the screen entirely, just that it was bigger compared with the original display. Any ideas what is the problem and how should I debug it? I suspect there is a short somewhere on the board which results in the ICs getting hot and failing as the temperature increases. Are those PAL and video chips also hot on your SE/30 board? If it helps, a few days before this happened and after I adjusted the CRT trimmer, I started to observe that the CRT would sometimes shrink slightly or shake shortly after power on, but it would stop doing so once the machine had warmed up. I attributed this to the old analog board, but after checking the voltage rails all look good (12.57V, 5.02V) with only 60-70mV ripple, which are acceptable. Let me know what you think. PS: I accidentally broke the CRT neck tube this afternoon when trying to adjust the trimmers on the analog board. The CRT is now trashed and I had to test the logic board using another Mac SE CRT, but that's a different story.
  11. mdanh2002

    Macintosh SE/30 Recap Issues

    I bought myself an SMD rework station 3 months ago but so far only practiced to use it on an old VCR circuit board trying to remove some ICs. Did not get the results that I wanted and burned several nearby SMD components as well. So i guess using it on the SE/30 motherboard to replace the RAM socket is not for me. I am happy with using tape to secure the RAM - who's going to see it once the case is put back During the repair process, I also checked through the commented ROM source code listing for the Macintosh Plus (not SE/30, but both should share similar ROM routines) here http://www.bigmessowires.com/mac-rom-inator/, it seems that the bootup routine starts with the check of timing signals, followed by the VIA and IWM. After that, the screen buffer is cleared and the RTC is tested by writing a byte and reading it back. If everything is OK at this point, then the 'bong' sound is played. After that, the RAM content is initialized, CPU type is checked (whether 68000 or 68010), and the typical grey screen boot screen is drawn. At this point, the boot disk icon is plotted and the machine starts to look for a boot disk. In my case, the boot process hung after a loud bong and a crisp raster screen, with no disk icon. The machine only starts to look for a bootable disk drive after the disk icon is plotted, so one can say that the hangup was not due to external peripherals (e.g. issues with floppy or SCSI bus), but rather something that prevents the ROM source code from continuing to execute. This is what leads me to suspect ROM issues. To add on, the mouse cursor only appears once the machine starts to look for boot disk. As soon as it finds a boot disk, the mouse cursor disappears again, the smiley Mac icon appears and the corners of the screen become rounded (it was square right after the startup chime). By following these symptoms you will be able have some ideas where during the boot stage your recapped Mac hangs and isolate the issue. @Boctor, yes, the boot chime is in the ROM as mentioned on the same website. I am not sure if the chime of death is also there too as I've found no mentions of it and have no time to dig into the ROM binary. However, I am still puzzled by the different screen patterns that show even when there is a problem reading the ROM. If the ROM is not functioning then which part of the board is actually responsible for drawing these patterns? Any thoughts?
  12. mdanh2002

    Macintosh SE/30 Recap Issues

    My RAM sockets were still pretty solid when I first touched the board. I think the sockets would have remain so had I been more careful in removing the RAM. Btw, the corners of the screen did get rounded off once the Mac found a boot disk and started to boot from it. The machine also comes with a SE/30 PDS Ethernet Card, which still works well. Unfortunately, download speed (tested with Fetch and MacTCP on System 7.1) is only around 30 KB/s at its best, despite the card being a 10Mbps card ...
  13. mdanh2002

    Macintosh SE/30 Recap Issues

    I got it working. Once I discovered some corrosions beneath the ROM slot, I washed the board a second time using white vinegar and let it dry for two days. Upon the next boot up, I immediately saw the familiar question mark on the screen asking for the boot disk! Yes, the motherboard, if working properly, is supposed to boot all the way until it asks for boot disk, even with no keyboard/mouse/floppy/hard drive attached. The machine now has System 7.1 installed using Amigakit SCSI2SD module, with the PDS ethernet card and everything (including file transferring via FTP) works perfectly fine. Audio is loud and great with no issues at all. The only thing I regretted is that I slightly broke a plastic piece on 2 of the RAM sockets while swapping RAM, thinking that it might be RAM issue. Now that these 2 sockets are loose, I have to secure the RAM using tape instead. Good learning lesson for the next machine that I recap. There are still another three in the queue...
  14. mdanh2002

    Macintosh SE/30 Recap Issues

    I just tried, no difference with the floppy drive and SCSI hard drive attached. I think it does not get passed the memory test. Also the corners do not get rounded off after a while - they are perfectly square. Any other ideas?
  15. mdanh2002

    Macintosh SE/30 Recap Issues

    Thanks for the fast reply! When I first got the Mac, it came with an internal 800k floppy and a 40MB hard drive. Both were super noisy once power was applied so I removed them. Let me try plugging the SCSI2SD from Amigakit and see if it makes and different. I did not notice if the screen corners get rounded after a while. Let me check. Does that indicate any issues with the analog board? During the recap I also checked the analog board and gave it a good cleanup. No obvious problems were detected, no capacitors seem to have leaked or bulged. The analog board was in fact quite clean so I did not recap that.
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