OSBORNE 1 |
SIZE measured with case closed
20.5 inches wide 14.5 inches deep 8.5 inches high WEIGHT 26.2 lbs (shipping weight 34 lbs.) PORTABILITY Leather handle for carrying When closed, unit is weather resistant Unit sized to fit under standard airline seat 120 volt detachable power cord stows within case with cover secured High impact plastic case meet UL 94VO flame retardance specifications POWER CONSUMPTION 120 volts AC 50-60 hz 37 watts maximum Configurable to 220 AC 50-60 hz Switching power supply ENVIRONMENTAL Convection cooled; no fan Maximum operating ambient air temperature 85 degrees F Humidity - 95% relative, non-condensing Minimum operating air temperature 32 degrees F DISPLAY SYSTEM 4K byte memory-mapped display memory in top page of main memory 9 bit wide display memory-7 bit ASCII plus underline and half-intensity attributes Scrolling performed by hardware in vertical and horizontal directions Solid underline cursor White video on dark background 24 lines of 52 characters visible 32 lines of 128 characters video memory over which window may be moved 10 scan lines per character line Cursor on lowest scan Character set 96 upper and lower case characters 32 graphics characters Video monitor Size of video area 3.55" horiz. 2.63" vert. P4 phosphor Linearity 10% adjacent characters, 15% overall Timing 64 microseconds per scan 16.666 milliseconds per vertical sweep 12 microseconds horizontal blanking 1.28 milliseconds vertical blanking |
SAFETY
Three-wire grounded power plug Fuse integral to AC receptacle Thermal cutoff opens when internal temperature exceeds 150 degrees F (resets at 130 degrees F) Power supply shuts off under overload conditions CONTROLS 69-key detachable keyboard, full-travel sloped keytops includes 12-key numeric keypad Power on-off switch in rear Reset pushbutton on front panel Brightness and contrast controls on front panel MAIN PC BOARD Processor-Z80A, 4MHz CPU clock Memory size-64K bytes programmable (RAM) 4K read-only memory bank-switched 60K of programmable memory available for software PROGRAM EXECUTION SPEED Program in read-only memory executes without delay Programmable memory adds average delay times as follows: First Ml cycle-188 nsec Subsequent consecutive Ml cycles-0 sec Non-Ml cycles-375 nsec INTERFACES Serial RS-232C 1200 or 300 baud, selectable in software DTR (pin20) handshaking input to control transmission data Modem-9 pin plug for use with external DCE type modem Adapter allows connection of modem and printer simultaneously IEEE-488 (General Purpose Instrumentation Bus) Controller only, talker and listener Keyboard-connects to keyboard through detachable cable External video-drives non-composite TTL video monitor supplied as option (same format as 24X52) Battery adapter-allows operation with external battery pack DISKS Media 5.25 inch diskettes, single sided, soft sectored Storage provided for 30 diskettes max 40 tracks per diskette 10 sectors per track 256 bytes per sector Max. seek time 20 milliseconds track-to-track Rotation time 200 milliseconds Recording standard-FM Controller type 1793 / / / |