Search results

  1. O

    Reworking the KeyLargo chip on QS/DA G4 logic boards

    I thought I got a good deal on a Quicksilver logic board on eBay, but it was DOA. Upon further inspection, I spotted these gouges in the substrate of what I believe is the KeyLargo chip, the smaller BGA on the back side of the board, near the PCI slots. The damage is in the lower right corner...
  2. O

    Found the 50MHz bus switch on Alchemy (5400/6400)

    tl;dr: Remove R95 and install R94 (10k ohm 0603) to configure the PSX chip for 50MHz operation. Full story: I picked up one of my dream Macs a couple of weeks ago, a 5400/200. I met up with @dv- at Free Geek Twin Cities to collect it and return his battery-bombed Q650 motherboard I repaired...
  3. O

    Finally found my white whale, a decent 5400/200

    I know these machines aren't universally loved, but I credit the 5400 for my interest in beige all-in-one Macs, and possibly Macs at all. My junior high school had them in the shop classroom for learning 2D CAD, and I remember thinking that they were so much better than the Dell my parents had...
  4. O

    Design review: Analogous Board for SE and SE/30

    I've been working on converting one of my SEs from CRT to LCD. It all started with picking up one of @retro apple mods' excellent kits on Etsy, but that's only part of the equation. The other parts are how to power the system without the original analog board, and how to convert the monochrome...
  5. O

    How does the software controlled brightness on the Classic work?

    I was daydreaming a bit this morning and wondered how Apple implemented the software controlled screen brightness on the Mac Classic, so I had a look at the Bomarc schematic. It shows the "PBL" (Programmable Brightness Level) signal originating from BBU pin 49 through a 47ohm resistor, then...
  6. O

    Source for SE and SE/30 Analog Board Plastic Push Pins?

    Does anyone have a source for the black plastic push pins that hold the white plastic sheet on the back of the analog board? Somehow I'm short a few. Seems like a generic part that may not be Apple-specific, but I'm not sure where to look.
  7. O

    3D-printed 68030 CPU Puller

    After bending a few pins by using a DIP puller to remove PGA 68030s from sockets (I know, I know) I decided I needed a better tool. I thought I'd have to design one myself, but I found this 68040 puller tool by jessenator on Thingiverse. I was able to scale it down to 68030 size, and it works...
  8. O

    128 pin PGA sockets for 68030s that don't suck?

    Like most people it seems, at least in the US, I used the HWS4514 socket from Phoenix Enterprises for the 68030 on my Reloaded board, because it's under $5 with no minimum order quantity. I have to say, though, I'm not very satisfied with it. The force required to insert and remove the CPU in...
  9. O

    Why no SE/30 L2 Cache Card?

    I know that there are adapters that allow a card designed for a IIci cache slot to plug into the PDS on an SE/30, and the IIci has the Apple 32KB cache card and various aftermarket 64KB and 128KB cards as options. So, why has nobody made an SE/30 cache card? Does the SE/30 lack something that...
  10. O

    Troubleshooting GLUE, C32M, and C16M

    I know this isn't unique to compact Macs because early Mac IIs also used GLUE, but I'm putting it in the Compact Mac subforum because it's related to my SE/30 reloaded build. My reloaded board isn't working; no bong, no video. In my troubleshooting so far, I've confirmed that the reset circuit...
  11. O

    Do 32-pin, 400mil SOJ sockets still exist?

    I'm thinking of building some 16MB 30-pin RAM SIMMs out of some surplus, unknown condition 128MB 72-pin SIMMs. With only 2 chips per 16MB SIMM, it should be pretty easy to weed out any bad ones, but it'd be great to be able to build some boards with sockets for quick, easy chip swapping. The...
  12. O

    obsolete's SE/30 Reloaded Build

    Is it still cool to document reloaded builds? I was lucky enough to get a board from zigzagjoe's recent batch. This is Bolle's Rev04 with croissantking's fix, green solder mask, and HASL finish, which solders like a dream. Also has all of the "birdseed" components on the bottom pre-populated...
  13. O

    This CRT is dead, right?

    I got this Mac SE cheap as "does not power on". I tested all the other parts from the machine individually and they all work, which is great; I was expecting a battery bomb or a dead PS/AB. After doing that, I noticed the tip missing from the end of the CRT. This will have broken the vacuum...
  14. O

    SE/30 - no bong, no video before and after logic board recap

    First of all, I'm new to the forum but have been reading and soaking up as much information as I can for the past few weeks. Wow, what a wealth of knowledge here. I love this place! I have an SE/30 that I'm trying to resurrect. I've had this machine since I was a kid. It used to work, then sat...
Top