Wiha 27920 Precision Chip Lifter, ESD Safe, 1 x 3.5mmwhat’s the best way to remove the EPROMs to burn the games on them? They are super close to each other and can only get under one side with my tools and worried I’ll break off pins on one side - thanks
+1 for kikaso's excellent advice - best five bucks I've ever spent on this hobby
Optional: Rotary Selector Installation
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Optional: Reset wire installation:
If you are using a selector, the reset wire can be installed. This needs to be connected to the reset wire position on the selector board
oneleaf86 S16 Selector
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I haven't used a TL866+, but here's a few pointers:
- The chip should be aligned all the way down, closest to the lever (as per the illustration on the programmer). Don't worry about the unused rows at the end.
- The chip should be flat all the way across. You may have to bend a few of the legs slightly with your fingers or tweezers to get everything lined up so the chip seats down properly in the socket.
- The System 16 kit uses one 27C801 chip and fourteen 27C322 chips. The chip programmer software should have a button you can click on to select the chip type.
- You'll need to Load the ROM into the programmer software, Write the ROM to the chip, and then Verify that it programmed correctly.
- The 27C322 chips hold a lot of data, and the TL866+ doesn't handle them very well. It has to program them one 512kb bank at a time - it's very tedious and time consuming.
- You'll need to set the S1 switch on the adapter to 27C322 and the Bank Switch dial to 0.
- Then you'll need to split each ROM file into 8 smaller 512 kb files, set the selector dial to a corresponding bank, then Load, Write and Verify the file for each bank one at a time, incrementing the bank selector dial after each bank is programmed to the chip - banks 0 through 7. Rinse and repeat for all 14 EPROMs. 8 times 14 equals 112 files to cover all 8 banks across the 14 EPROMs.
- You can use the program GSplit to split each ROM into eight 512 kb smaller files for you.
- 27C322 EPROMs have a high failure rate when programming - somewhere between 10 and 20% in my experience - so if a bank won't Write and Verify, wipe the EPROM in an eraser then try one more time. If it fails programming the second time, throw the chip out and try another one.
FYI: I offer free EPROM programming services for just the cost of shipping, and I have a high-end programmer than can knock out those 27C322 chips very quickly without having to split up the ROM files beforehand. Feel free to shoot me a PM if you'd like me to program the EPROMs for you.
The Wiha is awesome for the little guys, but for Eproms, once you this, you will wonder how you ever survived without it:+1 for kikaso's excellent advice - best five bucks I've ever spent on this hobby
I resisted buying one for several years, it's just a bent screwdriver, right? But now that I have one I would never go near an eprom without it.
Also Digikey and mouser if stock is a pain (spoiler alert: stock is a pain) various sizes