This edition of techblog shows you pictures of some of the old computers. When we running after quad processors to satify our needs, we must have a look at the evolution.

And after seeing these you can guess how our present day PCs will look like after 30 years. (Comments are welcome)

MITS Altair 8800

DOB: March 1975
CPU: Intel 8080, 2.0 MHz
RAM: 256 bytes, 64K max
Display: front panel LEDs
Controls: front panel switches
Expansion: card-cage with 16 card slots
Storage: external Cassette or 8″ floppy drive
OS: CP/M, BASIC

Apple 1

DOB: March 1976
CPU: MOS 6502, 1.0 MHz
RAM: 4K (upto 65K is supported)
Display: monochrome
Ports: composite video O/P , keyboard interface and one vertical expansion slot
Storage: cassette interface available
OS: firmware in ROM (HEX) Apple BASIC on cassette

IBM Portable PC

Model: 5100
DOB: September, 1975
CPU: IBM proprietary, 1.9MHz
RAM: 16K (upto 64K is supported)
Display: 5″ monochrome monitor
Storage: Internal 200K tape (DC300)
Ports: tape or printer I/O port
OS: APL (and/or BASIC)

Hewlett-Packard Model 85

DOB: December, 1979
CPU: Custom HP 8bit @ 0.613MHz
RAM: 8K ( upto 64K is supported)
Display: built-in 5” monitor
Storage: built-in DC100 217K tape drive
Ports: 4 expansion ports
OS: HP BASIC in ROM

Apple Macintosh

Model: M0001
DOB: January 1984
CPU: Motorola 68000, 7.83 Mhz
RAM: 128K ( later 512K was supported)
Display: 9-inch monochrome
Ports: Two DB9 serial ports , Printer and External floppy port
Storage: Internal 400K SSDD floppy ( there is also an optional external floppy)
OS: Macintosh (GUI version)

If you wish to have any of these old PCs (except apple), please mail me