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Found 3 results

  1. A couple of months back I bought a 1MB SRAM card for my Macintosh Portable (non-backlight) from a vendor in France via eBay. Unfortunately the vendor lied that it was in full working order as it didn't work. (Thankfully I got my money refunded and he didn't want it back.) Well, something terrible had happened to the card all the chips connected directly to the address and databuses were fried, including the 74AC24x chips on the board were fried. I'm guessing that the VLSI custom chip is too. After replacing the 74AC24x chips the card partly works. It mostly doesn't pass the memory test but once in a while I managed to get to the debugger. After doing this once I tested the memory and it does work to a point. I I can read and write to it fine, but the data is replicated every few kilobytes, so it looks like the chip select isn't working, i.e. the VLSI chip is shot. So as to get further with the diagnosis I'll either need a schematic of the card or at the very least the pin-out and functionality of the custom VLSI "Dunkirk" chip. Does anyone have either of these? If in any doubt, I've attached an image of the board (before chip replacement).
  2. Hi guys, So there are some games that I want to run from MacIntosh Garden which need Mac OS 9. (Marathon in particular, anything in color) I've been looking around to see what my options are. There are a few but being so new to Mac I can't figure out which is the best one. So I need your help guys. Any feedback would be appreciated. Here are the options that I can see: 1 - Run SheepShaver on my iBook G4 to get Mac OS 9 going. I'm not sure how well the games will run considering the iBook specs 2 - Run Mac OS natively(?) on this iBook G4 ( not sure if this is even possible with my hardware) 3 - Buy a PowerMac G4 and run MacOS 9 natively. I like this solution but you need a treasure map to navigate the compatibility landmines of G4 hardware and Mac OS 9 https://en.wikipedia.org/wiki/Mac_OS_9 4 - Buy a modern Mac to run SheepShaver upon. This is a very expensive solution I'm sure there are options I haven't thought of and also nuances to these options that I might not understand at this time. Any help on this topic is appreciated.
  3. I don't know if I'm using the wrong search words or just don't know what I'm looking for, but I'm curious about what happens when the Apple I, II, III and Lisa have a hardware problem that would cause a Sad Mac in later computers. I'm a very visual person so pics would be great, but they seem to be hard to find so a description of some sort would work too. Thanks everyone!
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