The old man ZEOS 386SL-25Mhz 4Mb. Outside and inside

One evening, returning home from work, I noticed in the stairwell on the window sill a handful of pieces of iron, remotely resembling a laptop. Everything lay in a neat pile, but separately - the display, the motherboard, parts of the case, the keyboard and even the battery. Having no indifferent attitude to the glands in general and the old glands in particular, I without hesitation grabbed all this stuff into a heap and carried it home. What came out of all this set of pieces of iron can be seen by looking under

When I came home and examined all the selected parts, I discovered the absence of a trackball and a pad that was attached to the battery and a hard disk. The power supply was also missing. Considering the missing components are not critical, I assembled all the components into one and turned out to be an old laptop: a ZEOS with a 386SL-25Mhz processor and 4Mb of RAM on board. Looks like a laptop in the closed state is quite elegant and compact for those times. And of course, no gloss:


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The following picture shows the absence of a trackball, which was supposed to be at the top of the keyboard. A rather unusual solution, but it seems to me that it harmoniously fits into the miniature dimensions of the device:



The keyboard was suddenly Russified in an “industrial” way. The buttons are pressed clearly, without clicks. But, looking ahead, I will say that half the buttons on it unfortunately did not work.



The laptop matrix is ​​monochrome, to my shame I don’t know the resolution. On the left side are the hard disk indicators, caps Lok, Num Lok and power. On the right side are two depressed sliders that allow you to adjust the brightness and contrast. Unfortunately, the photos are not visible.



The laptop is equipped with quite good (and maybe standard) I / O ports at that time: There is an LPT port, a COM port, an integrated modem, a VGA-video output and a non-standard port for connecting additional peripherals (I suspect an external drive).




Having got acquainted with the appearance, we solder the wires to the power connector (the benefit on the sticker was clearly written 14V, the polarity was found by the nearest electrolytic) and power the design from the power supply unit of my laptop (12V). The “Power” light comes on, the screen blinks and we hear the usual - piiip!



Of course, the CMOS battery has already died a long time ago, there is no hard disk, there is no drive either, so we have no place to boot. Well, we will be content with the loading screen



And the first BIOS setup menu



Unfortunately, in the absence of a hard disk or a specific disk drive, it was no longer possible to play live with a laptop on the BIOS. Yes, and the keyboard let down, did not work a lot of buttons, sometimes even the cursor buttons did not work. Therefore, with screenshots of a working laptop on this we finish the review. But the most interesting thing awaits us ahead - hardware component of ZEOS

Removing the keyboard in front of us is filling the laptop. The motherboard and some daughter boards (“daughters”) inserted into the main board open


Link to the big picture

Let's get acquainted with all the boards closer. So, removing the board from yellowish PCB, we see a daughter modem. Built modem on the Rockwell RC224ATF chipset and can operate at a speed of 2400 baud



The next motherboard is a memory. As suggested byte Here 2 Mb. Each module is 512Kb. The remaining 2 Mb are soldered directly on the board and will be visible below.



Another appendage on the motherboard is a power supply stabilizer board and apparently there is also a battery charging controller



It looks like the motherboard outside the case with all the daughter boards installed on it


Link to the big picture
And this is how the motherboard looks like with all the daughters removed


Link to the big picture

But the very "heart" of the computer is hidden on the back of the motherboard. There we can see the processor itself


Link to the big picture

Processor closeup



Coprocessor As romx tells it, according to the Complete ISA Peripheral Subsystem part guide - close-up



About this chipset installed in the immediate vicinity of the processor, I doubt a little, but it seems to me that this is a cache memory . byte said that this is the main memory of the computer - 2 Mb.



Now back to the front side of the motherboard and look closely at the video card



In conclusion, I will say that this instance was given to another collector who promised to bring the machine to a fully working form. Repair the keyboard, find a suitable hard drive and use to run DOS-games and programs. That's probably all that I could tell you about this wonderful typewriter. Perhaps you will tell me something about it,%% username?

PS: I apologize for the quality of the photos. No photographer out of me, nothing to do.