Sharp PC-6200/6220

Hi. I got this rare laptop which was made in 1990 and was sort of top quality business laptop of it's time. Originally I got this because I wanted to play some very old dos games which are clocked to speed of processor, so you can imagine how fast they work with new computers... even 75 Mhz was way too fast!


Specifications:

286 Processor, 12 Mhz (CPU bus speed works as pairs and those pairs can be Switced between 12Mhz/6Mhz, 7.16Mhz/7.16Mhz or 6Mhz/6Mhz)
20 Mb hard drive (no, I am not joking xD)
3 Mb RAM ( 1 mb factory, installed rare 2 mb ram card, wow)
Monochrome LCD, Emulating VGA (16 shades of grey)
MS DOS 4.01 build-in ROM (Includes also all factory utilities and drivers)
Connections: Expansion (Expansion unit, external floppy drive, external battery pack), Serial, parallel and external Numpad.

Very inspirational and ultimately darn handy feature is that MS-DOS (4.01) can be installed from ROM circuit so you can always boot ROM and install it whatever you format hard drive and switch booting from ROM to Hard drive. AWESOME! (when we will be able to install windows from ROM??? Hello, Bill Gates!)

Funny enough, external floppy disk drive have connection for PS/2 keyboard!!!
Can you imagine PS/2 port in 1990? More common was 5-pin connector for keyboards.

Also I own pretty rare huge expansion unit which is funnily big metallic box which acts as a standalone power source and can be fitted with 2 ISA cards plus the external floppy disk drive too. Anyway, a pity that this laptop's expansion card (installed near the serial port inside the laptop) is just modem/fax card and the original factory VGA card (CE-621A) is missing and the lcd is monochrome so... but eventually I installed ISA screen card and so now I can have full colors. Is there anyone owning the original CE-621A VGA card? I am still missing it because now if I want colors, I have to carry this huge metalbox around. Also the only other missing thing is external 5 1/4" floppy disk drive but it's so old thing that I wouldn't necessary need it but it would still be very nice addition to this vintage laptop. The internal battery have also already leaked out so it's totally useless. I also own 2 add-on battery packs which are made to maintain power much longer, but they are so overused that 1 battery pack can hold as much as between 15 minutes to one full hour and the other one only 3 minutes. I could buy new cells for batteries, but just having technician guy installing them cost way too much to be enough reasonable.

Also, as this is business laptop, it's designed to be closed system... which means that the hard drive cannot be removed, unless you cut plastic away covering the hard drive!!! Luckily I could solve this problem with expansion unit: I installed another ISA card; Adaptec SCSI card and now I own external 2 Gb and 1 Gb JAZ drives and have disks too and I can switch them between very new and old computers and my synthesizers too! (I use the only available program to format 1.62 Mb floppy disks which my synthesizer use and it's very old dos program and is not working with new computers). Pictures below are taken before I got SCSI.