Editing Osborne Executive

{{Infobox computer
| name         = Osborne Executive
| image        = [[File:Osbourne-executive.jpg|250px]]
| caption      = Osborne Executive portable computer
| manufacturer = Osborne Computer Corporation
| type         = Portable Computer
| release date = 1982
| discontinued = 1983
| price        = US$2,495 (1982)
| cpu          = Zilog Z80A @ 4 MHz
| memory       = 128 KB RAM
| storage      = Dual 5.25" double-sided, double-density floppy drives (each 360 KB)
| display      = 7" amber monochrome CRT (80×24 text)
| sound        = None
| dimensions   = 18.5" × 11.25" × 7.5"
| weight       = 28 lbs (12.7 kg)
| os           = CP/M 2.2
| predecessor  = [[Osborne 1]]
| successor    = [[Osborne Vixen]]
| codename     = 
| model        = OCC Executive
}}

The '''Osborne Executive''' is a portable CP/M-based computer released by Osborne Computer Corporation in 1982 as the successor to the Osborne 1. It featured a larger screen, more memory, and enhanced storage capacity, targeting business users seeking improved portability and performance.

== Architecture and Processor ==
At its core, the Osborne Executive utilised a '''Zilog Z80A''' microprocessor running at 4 MHz. This 8-bit CPU was widely used in CP/M systems of the era, providing compatibility with a large library of business and productivity software.

The system architecture was designed to maximise performance within the CP/M environment, supporting bank-switched memory to address up to 128 KB of RAM—double that of its predecessor.

== Memory and Storage ==
The Executive shipped with:
* '''128 KB RAM''' (bank-switched, with 64 KB accessible at a time under CP/M 2.2)
* ROM containing the boot loader and system utilities

For mass storage, the Executive featured:
* '''Dual 5.25" double-sided, double-density floppy drives'''
** Each drive stored up to 360 KB per disk, for a total of 720 KB of removable storage.
* No internal hard disk; all storage was floppy-based.

== Display and Graphics ==
A key improvement over the Osborne 1 was the Executive's display:
* '''7-inch amber monochrome CRT'''
* '''80 columns × 24 rows''' of text (compared to the Osborne 1's 52×24)
* No bitmap graphics capability; text-only output

The larger, higher-resolution screen made the Executive more suitable for word processing and spreadsheet applications.

== Sound Capabilities ==
The Osborne Executive did not include dedicated sound hardware. Any audio output was limited to system beeps generated by a simple internal speaker.

== Input/Output and Expansion ==
The Executive provided a range of I/O ports for peripheral connectivity:
* '''IEEE-488 (GPIB) port''' for printers and external devices
* '''RS-232C serial port''' for modems and serial peripherals
* '''Parallel (Centronics) port''' for printers
* '''Video output''' for external monitor (monochrome composite)
* '''Keyboard''' – detachable, full-stroke, 69-key keyboard with numeric keypad
* '''Expansion slot''' for optional modem or other add-ons

The system was bundled with a suite of productivity software, including WordStar, SuperCalc, and dBase II.

== PCB Schematics & Service Manual ==
<templatestyles src="Template:StyledTable/styles.css" />

The Osborne Executive's hardware comprised a main logic board and a separate power supply board. Detailed schematics and service documentation were provided to support field repairs and upgrades.

{| class="wikitable styled-table" style="width:80%; text-align:center;"
! Main Logic Board
! Logic Board Schematics
|-
| [[File:Osborne-Executive-Motherboard.jpg|thumb|center|300px|Osborne Executive Main Logic Board]]
| [[File:Osborne Exec Schematic.pdf|center|thumb|Osborne Executive Schematics]]
|}

For full service documentation, see the [[:Category:Osborne Documentation|Osborne Documentation]] category.

== Gallery ==
<gallery mode="packed" heights="200">
File:Osbourne-executive.jpg|Osborne Executive portable computer (open)
File:Osborne_exec_keyboard_ditached.jpg|Osborne Executive with keyboard detached
File:Osborneexecutive-crt.jpg|7" amber CRT display (80×24 text)
File:Osborne-Executive-Motherboard.jpg|Main logic board
</gallery>

== Related Pages ==
* [[Osborne Executive Maintenance Guide]]
* [[Osborne Executive Troubleshooting Guide]]
* [[Osborne Executive Keyboard Repair Guide]]
* [[Osborne Executive Capacitor Replacement Guide]]

[[Category:Osborne]]