Hi, All, Chunking through the pile of old machines has revealed a Hyundai Super LT-3 80286 laptop. I see several for sale presently on the infamous auction site (and not selling...) and I see numerous forum requests for DIP switch settings (it has two 8-pin feature DIP switches behind the carrying handle and one 4-pin switch in the battery case - along with a dozen 3-pin jumpers inside). Everyone refers back to an InfoWorld review...
https://books.google.com/books?id=ATwEAAAAMBAJ&pg=PT7 ... that mentions the DIP switches select CPU speed, boot drive and external video adapter (the unit has a built-in supertwist 640x480 LCD that reponds as CGA, but there's a DE-9 marked EGA on the back). So I guess I'll add my voice to the chorus to ask if anyone has any documentation on the DIP switches and/or internal jumpers. My unit has a dead Dallas DS1287 battery, of course, and like all of them, you have to replace the unit or add an external battery to the existing unit or the CMOS settings are _not_ preserved after setting them and saving-and-exiting. This is not specific to this laptop; I've observed this behavior on other PCs with Dallas DS1287 clocks (unlike the NiCd-powered cheap clone motherboard clocks that _do_ work without/with a dead battery if you boot up, update the settings and just don't turn it off). Like in my Compaq SLT/286, the DS1287 is soldered in place here, so I'm going to attempt to cut the case without desoldering the chip. There's plenty of room inside the case to mount a CR2032 out of the way on a 4" lead. I can test the Connor 20MB hard drive in another machine. That's easy. One interesting bit about the LT-3 packaging - the drive is _not_ powered via its 4-pin Molex connector. It's powered by a JST connector on the other side of the drive. There are no internal Molex connectors from the internal PSU. If I replace the spinning drive with a IDE-CF adapter, I'll have to hack the power connector. No biggie, just an extra step. It seems that there is not a lot of love right now for 80286 machines, at least as evidenced by the perpetual relistings of sales that fail to garner an asking price of $80. All the attention with retro-DOS is with the 486. FWIW, I still use my Compaq SLT/286 because it has a docking station with 2 ISA slots and one of those is stuffed with a proprietary ISA card to drive my B&C Microsystems device programmer. If it weren't for that, I'd have no real "need" for a '286. Thanks for any info or tips on the configuration of the Super LT-3. I did document the present settings so I could just start flipping switches, but I'd love *any* period docs on what any of them are. Once I get the CMOS battery situation fixed, I may just try flipping switches to see what changes. I don't think I have a color EGA CRT anywhere (who still does?) but I do have a wee monochrome EGA ELT flatscreen for testing. -ethan
