Jump to content


68kMLA Supporter
  • Content Count

  • Joined

  • Last visited

Everything posted by rsolberg

  1. I saw that the cache module ended up being the wrong one in your Trading Post thread. If you'd like to post front and back photos of it, I'd be happy to try identifying it for you so you know what it fits and who might want it.
  2. I couldn't find the cable for my MP2100 to test this, but I was going to try recreating your problem. Once I'd done that, my next step was going to be setting AppleTalk active in Chooser, changing it to the IRTalk (infrared) port in the AppleTalk control panel, then setting AppleTalk to Inactive again in the Chooser.
  3. Success! I didn't have a UV EPROM eraser, so I made one with a $17 6w UV-C disinfecting lamp attached to the lid of a plywood box I had kicking around. With the EPROMs a few inches below the lamp, they were completely erased in less than 5 minutes. The SE shows the updated version on the Radius boot splash screen and it boots into 6.0.8 without throwing bus errors!
  4. I think I recognize the Philips IC from my Performa's Apple Video System composite in board.
  5. Thought I would follow up on this thread. I just got a TL866II Plus programmer and dumped my original v1.8 ROMs. http://macintoshgarden.org/apps/radius-accelerator-16-macintosh-se-rom-v18 I will be flashing the 2.1 ROMs I found on Macintosh Repository and verifying compatibility soon. https://www.macintoshrepository.org/27255-radius-se-accelerator-2-1-roms
  6. I can confirm that the videos play (outside of the browser) with no issues in System 7.1 with Quicktime 2.1. Quicktime 1.6.2 throws a "data reference not found" error when trying to open the files.
  7. Every desktop Mac with a built in floppy drive, from the 128 to the beige G3 shipped from Apple with an auto eject drive. If you mean manual inject (where you push the disk all the way in and it drops down with a clunk) vs auto inject, (where you push the disk most of the way in and the drive pulls it in the rest of the way automatically) Then earlier Macs tend to have the auto inject drives, with the change to manual inject drives happening around 1994 or so. I believe all PCI based PowerMacs shipped with manual inject drives, while the 6100, 7100, and 8100 had auto inject drives
  8. IDT71V433 is a 32k*32 bit 3.3v SRAM, making them 128KiB each. I believe it's 11ns based on your photos. These are 3.3v cache tag SRAM in an 8k*16 bit configuration, making 128k bits/ 16KiB each. Yours appear to be 12ns The IDT74FCT163373 is a 3.3v 16-bit transparent latch, which I suspect is being used to buffer the tag SRAM, or could be used for part of the level shifting circuitry The IDT74FST3xxx ICs are level shifting bus switches. As Trag suspected, the SRAM in your modules is 3.3v, but the cache logic on our logic boards is 5v. Basically most o
  9. Here's my 256KiB IDT branded IDT7MP6071 cache module that I have installed in my 6360. When I bought it from eBay some time ago, I believe it was listed as for a 7600. It has eight IDT 71256 15ns 5v 32k*8 SRAM ICs, one IDT 71216S12PF 16k*15 tag SRAM IC with integrated comparators that appears to be specifically catered to PowerPC and other RISC platforms and rated up to 66MHz. The large IC is a mystery to me. It looks like the later IDT7MP6071A module (like in Jessenator's photo above) is lower profile and uses a significantly smaller IC.
  10. I would expect 10MB/sec with the drive connected to the 50 pin port on the model of 2940 you describe. 10MB/sec is the limit for 8-bit (50 pin) Fast/Narrow SCSI. If you had an Ultra SCSI capable card like the 2940UW, you *might* get up to 20MB/sec if the cabling is adequately screened. I believe that your 2940 card supports 20MB/sec with high voltage differential (HVD) signalling on its wide bus. Your more modern SCA hard drive certainly uses low voltage differential (LVD) signalling, so it's not a great idea to connect your drive to the 68 pin connector on your card as malfunctions and da
  11. For the purposes of testing, I'm going to plonk that module onto a breadboard and plug my Farallon PC Card's Ethernet cable into it. Ultimately, I'd like to try and fit it into the 1400's internal expansion space where the video output or (seemingly unobtainium) Ethernet card goes. If I can't find said Ethernet card, I'll leave the jack on the Centipede module and mount it flush to the rear ports on the laptop. If I can find the internal Ethernet card, I may remove the jack from both the card and the Centipede in an effort to fit both into the laptop. I was kind of hoping the internal expa
  12. I reached an impasse with the ESP32 last night. I decided to put it away for a little while to look at it with fresh eyes. In my frustration, I decided to order an 8devices Centipede. It's a very small linux-capable SBC running a MIPS 24k CPU core, ample flash and RAM, with 2.4GHz WiFi and 10/100 Ethernet on board. It comes preloaded with OpenWRT which is ideal for setting up a WiFi to Ethernet bridge. It can be configured through the LuCi web interface or through telnet/SSH, so it should be manageable on the 1400. Perhaps best of all, the whole thing runs on a 5v supply. I will report
  13. Whoops, I kinda missed your second post. For on-the-go Wifi on the 1400, I'm hoping to come across one of the internal Ethernet cards for it. I've built up a small ESP32 board with an Ethernet interface and I'm working on making it behave nicely as a Wifi to Ethernet bridge. Ultimately, I'd like to shave the 8p8c jack off of the ethernet module and try to squeeze the ESP32 into the expansion bay inside the 1400.
  14. I have some experience with a similar card (Orinoco Silver) which I believe was flashed with the Gold firmware in my 1400s and Wallstreet. I gave up on getting WPA to work on the 1400, since I believed any implementation of the cryptography would have to be in software and I felt that the performance penalty would be too great. I did get WPA working on the Wallstreet, but only in Mac OS X 10.3.9 with a paid third party driver. Even then it was limited to WPA, not WPA2, so I'd have to reduce my Airport Extreme router security by allowing WPA/WPA2 mode instead of WPA2 strict. I enabled Guest
  15. And to really mix things up, these were essentially analogue video camera hardware that recorded individual "video still" frames to a novel recording media - a diskette that held analogue video frames or fields - like a video tape. To transfer to computer, you had to use an analogue video capture card or a special frame grabber. The image quality could be diabolically bad, particularly if the A/D converter couldn't produce a clean image from the single frame.
  16. FileMaker to the rescue!
  17. I pulled the Apple video output card from my main 1400 in hope of finding the (seemingly quite rare) Ethernet card that fits in the same location. AFAIK, it utilizes the logic board VRAM and is of no advantage to built in video. Enabling its output drops the built in display to 256 colours as well.
  18. Those higher voltage ratings seem perfectly sane. A higher voltage rated cap will function the same as the original if all other things are equal. Having more headroom between the working voltage and rated voltage is generally a good thing when it comes to reliability and longevity. If you're concerned about a problem with the recap job, I'd suggest double checking that polarity is correct, checking for continuity, looking for components that may have been accidentally desoldered near the caps, and pins that might have been accidentally bridged.
  19. I would also try holding down D at power on to try forcing the system to boot from the internal hard drive, and holding CMD+opt+shift+del+0 at power on to force the system to boot from SCSI ID 0 if holding D doesn't work.
  20. I'd also replace the third input filtering capacitor -- the smaller yellow rectangular cap pictured in the foreground to the right of the fuse. This topic should actually go in the Apple II subforum rather than the Mac II/Quadra/Centris forum. Maybe an admin can move it?
  21. I'm pretty sure the vendor I sourced my RAM from is gone, but having had a look on eBay, there seems to be a fair bit of compatible RAM available. I checked the soldered RAM on the back of the board in your photos and it's 60ns FPM. Some Alchemy family logic boards should only use EDO memory, but others can use EDO or FPM. Yours obviously can use either, since the soldered RAM is FPM. It's important to note that while these boards take 168 pin DIMMs, they're not the same as 168 pin SDRAM DIMMs. The notches are in different positions, to make it harder to accidentally install the wrong typ
  22. I can confirm adding a 256K cache module makes a pretty significant improvement in performance. I equipped my 6360 with one. (basically the same logic board but with a 160MHz 603e) Combination PCI cards (USB and FireWire on the same card, for example) can be quite fickle to get working on this family of machines, so it may be worthwhile to keep an eye out for a CommSlot II Ethernet card if you plan on expanding the system in that direction. I can also confirm that a PCI ATI Rage 128 from a B&W G3 is an excellent upgrade to the onboard video.
  23. I can't speak for all beige machines, but with my Performa 6360, the built in video seems to be disabled when a (Mac compatible) PCI graphics card is installed. I think the card's boot ROM supersedes the onboard video, and the system firmware disables the onboard. On the beige G3s, the onboard video can be used simultaneously with the add-in card. Which one is used as the primary display is determined by the Monitors control panel. It's possible to have a no display condition if you have the system set to use the add-in card's monitor as number 1, but then remove said card.
  • Create New...