* Aliens ( Kaypro video game ), a text-only clone of Space Invaders written for the CP / M operating system

Note that the 64x16 TRS-80 mode screen uses only a small part of the monitor screen, because the letters are the same size as the 80 × 25 CP / M screen, this was one of the things that was soon after fixed with the redesign to a commercial product

The Aster computer could use the software written for the popular Tandy TRS-80 computer while fixing many of the problems of that computer, but it could also run CP / M software, with a big amount of free memory ( Transient Program Area, TPA ) and a full 80 × 25 display, and it could be used as a Videotext terminal.

When the boot loader detected a CP / M floppy, the Aster would reconfigure its internal memory architecture on the fly to optimally support CP / M with 60 KB free RAM for programs ( TPA ) and an 80 x 25 display.

With a special configuration tool, the CT-80 could reconfigure its floppy drivers to read and write the floppies of about 80 other CP / M systems.

Also the more interesting software offered for CP / M systems could not run well on a TRS-80.

So they decided to designed a TRS-80 and CP / M software compatible computer system, which ( following the lead of Apple Computer ) they decided to name after a " typical Dutch flower ".

So they called it the Aster CT-80 ( CP / M / Tandy-1980 ).

Because the original designer had left the company another employee completely redesigned most of the system, ( adding a display snow remover circuit, true 80 / 64 column text mode support, ( with different size letters for TRS-80 and CP / M mode, so that in TRS-80 mode the full screen was also used, not just a 64x16 portion of the 80x25 screen ) with an improved font set ( adding " gray scale " version of the TRS-80 mozaik graphics and many special PETSCII like characters ), and a more flexible and reliable floppy disk controller and keyboard interface plus many other small improvements ), also an enclosure was developed for the main computer system, ( in the form of a 19-inch rack for the Eurocards ) and for two floppy disk drives and the power supply.

A software engineer was hired to write the special " dual boot mode " BIOS and the special CP / M BIOS.

The " dual boot mode " BIOS actually discovered whether a TRS-DOS, or Aster CP / M disk was placed in the drive, and would, depending on the type of disk, reorganise the internal memory architecture of the system, to either be 100 % TRS-80 compatible or optimally support CP / M, with as much " workspace " as possible, and the 80x25 video mode.

After the Aster having been a few years on the Market Tandy released its own improved model, the TRS-80 Model 3 computer which solved many of the same problems that the Aster also had solved, but the model 3 still did not fully support CP / M as the Aster did.

The color memory was also available in the " normal " TRS-80 and CP / M text modes, which meant that existing TRS-80 and CP / M software could be easily modified to add color.

On the software front, work was being done to implement the replacement for the aging " user interface " of CP / M, ( the Command Console Processor CCP ) with the more modern ZCPR.

The comparatively low price for a complete computer system with dedicated monitor, its high resolution monochrome text and graphic capabilities and the possibility to run CP / M software also rendered the system attractive for business users, which was reflected by a wide selection of application software.

The first BBSes used homebrew software, quite often written or customized by the SysOps themselves, running on early S-100 microcomputer systems such as the Altair, IMSAI and Cromemco under the CP / M operating system.

* CP / M, " Control Program / Monitor " microcomputer operating system ; a precursor to IBM PC-compatible disk operating systems

The acronym CP / M for " Control Program / Monitor " was later backronymed " Control Program for Microcomputers ".

MP / M ( Multi-Programming Monitor Control Program ) was a multi-user version of the CP / M operating system, created by Digital Research developer Tom Rolander in 1979 .< ref >

CP / CMS ( Control Program / Cambridge Monitor System ) was a time-sharing operating system of the late 60s and early 70s, known for its excellent performance and advanced features.

* CP, the Control Program, created the virtual machine environment.

* CP: Control Program.

* The Southern Pacific Railroad named a Control Point after Lick ( CP Lick ) on their Coast Line route in San Jose, California.

Buteyko uses a measurement called the Control Pause ( CP ), defined as the amount of time that an individual can comfortably hold breath after a normal exhalation.

A coupling facility is a mainframe processor ( runs in an own LPAR, with dedicated physical CP, defined thru HMC ), with memory and special channels ( CF Links ), and a specialised operating system called Coupling Facility Control Code ( CFCC ).

* File Control Block, a data structure in CP / M and DOS operating systems

* Peripheral Interchange Program, a file transfer utility under CP / M and several Digital Equipment operating systems

Program text, variables, disk buffers and the CP / M operating system itself all had to share the 64 kilobyte address space of the 8080 processor.

Assumption also offers college credit through the ACES Program, which provides dual credit through Bellarmine University, and these courses are commonly referred to as the CP level.

They will be populated by CP / M-86 with the zero page ( comparable to the Program Segment Prefix in DOS ).

* CMS (" Conversational Monitor System ", renamed from the " Cambridge Monitor System " of CP / CMS ).

Any S / 360 operating system could in fact be run under CP, but normal users ran Cambridge Monitor System ( CMS ), a simple, single-user operating system.

This portion of the CP / CMS system was renamed Conversational Monitor System when IBM released VM / 370.

The discovery of CP violation helped to shed light on this problem by showing that this symmetry, originally thought to be perfect, was only approximate.

The name originated from the Basic Input Output System used in the CP / M operating system ( released in 1976 ), where the BIOS was loaded from disk, with only a small boot loader program stored in read-only memory.

The term BIOS ( Basic Input / Output System ) was invented by Gary Kildall and first appeared in the CP / M operating system in 1975, describing the machine-specific part of CP / M loaded during boot time that interfaces directly with the hardware ( a CP / M machine usually has only a simple boot loader in its ROM ).

It offered MFM capability for accessing CP / M disks, improved speed, and somewhat quieter operation, but was only manufactured until Commodore got its production lines going with the double-sided 1571.

A C128 in CP / M mode equipped with a 1571 was capable of reading and writing floppy disks formatted for many CP / M computers ; specifically, the following formats:

However, booting CP / M was only supported from disks in the standard Commodore GCR format ; the MFM formats could only be used once the system was running.

Gary Arlen Kildall ( May 19, 1942 – July 11, 1994 ) was an American computer scientist and microcomputer entrepreneur who created the CP / M operating system and founded Digital Research, Inc. ( DRI ).

CP / M's quick success took Kildall by surprise, and he was slow to update it for high density floppy disks and hard disks.

Dorothy might have believed that the company could not deliver CP / M-86 on IBM's proposed schedule, as the company was busy developing an implementation of the PL / I programming language for Data General.

By the release of Version 6 Unix ( 1975 ), the game had been ported to Unix C. An implementation of Hunt the Wumpus was typically included with MBASIC, Microsoft's BASIC interpreter for CP / M and one of the company's first products.