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About rsolberg

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  1. I believe that the chassis for all of the Studio CRTs were sourced from LG, whether it's a 17" Diamondtron or a 21" Trinitron tube. LG didn't offer a 21" aperture grille monitors at this time, so their closest models around the time would be: 1. Studioworks 221U which had a 21" shadow mask FST tube, 4 port USB hub, and 1800x1440@80Hz or 1600x1200@90Hz "flicker free" maximum resolution 2. Flatron 915FT Plus which had a 19" aperture grille tube, 4 port USB hub, and 1800x1440@70Hz or 1600x1200@85Hz "flicker free" maximum resoluton (like the Studio Display 21) Maybe
  2. Based on the screen to bezel ratio, it looks like the 17" which has a Mitsubishi Diamondtron aperture grille CRT. I quite like Diamondtron CRTs- most I've encountered seem to have different phosphors and AR coatings than Trinitrons, offering deeper blacks even in brightly lit spaces. I'm not sure if the Diamondtron is a licensed version of Trinitron or if it's an independent design after Sony's patents expired.
  3. 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.
  4. 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.
  5. 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!
  6. Have you tried different SD cards?
  7. I think I recognize the Philips IC from my Performa's Apple Video System composite in board.
  8. 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
  9. 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.
  10. 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
  11. 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
  12. 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.
  13. 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
  14. 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
  15. 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
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