CP/M-09 [English]

CP/M-09

• CP/M-09 is a floppy-based OS that runs on one of the retro PCs, the Fujitsu FM-11 system (CPU6809/ 6309+RAM64KB+FDD). No Z80 card required. It is a CP/M compatible OS that works only with 6809/6309.

• Actually, it is better to say a floppy image OS that runs on "FM-11 Simulator V1.03" on Windows.

• We provide a 320KB image file of CP/M-09 for FM-11 simulator, an operation guide, a user's guide, and a manual book 'Making CP/M-09 & inside CP/M'.

• As of April 2022, there are no apps for programming or business such as editors and assembler compilers yet. Its a chance to show your skills ?

It actually works, ie, executable in the simulator, but neither practical nor a game. It's useless now. It is a parody that has been delayed for 40 years.

FM-11 simulator V1.03

• Nowadays, the actual retro PCs that are fully operational are rare. An application called an emulator has appeared in place of the actual machine. It runs on many platforms such as Windows.

• FM-11 Simulator v1.03 is a Windows emulator that completely simulates an FM-11 system. Not only 6809 but also 6309 and Z80 cards are supported. If you have an image file of the boot disk, FBASIC, OS-9, Flex, CP/M-80, and CP/M-09 will boot. Of course, game software is also OK. If it only uses FBIOS/DisplaySubsystem, it will work on CP/M-09 as well.

It was published on the FM11 execution screen (nanno.bf1.jp/softlib/man/fm11/) .

CP/M

　Initially, BASIC was bundled with the retro PCs. ROM-BASIC that has a monitor function in BASIC, and Disk BASIC that has a file operation function. After that, a general-purpose OS was created for PCs to use business software such as word processors/spreadsheets/databases and programming software such as assemblers/compilers, and quickly gained enthusiastic support.
　CP/M was one of them, and it was released earliest and boasted an overwhelming number of users and software. In addition to CP/M-80 for 8080/Z80, CP/M-86 for 8086 and CP/M-68K for 68000 have been released. However, there is no CP/M for 6809/6309.
　One of the reasons for acquiring users is that the CP/M format of 320KB floppy disks was common to many models.

However, with the rise of IBM-PC, users have moved to MS-DOS, which has good usability and is easier to use.

Retro PC

　8/16bit PC sold in the late 1970s and early 1980s. Initially, it was called a microcomputer. FM-11 (Fujitsu Micro11) released by Fujitsu is one of them. 8-bit machines can be roughly divided into two types depending on the CPU used. The major CPU is 8080/Z80. Next is 6809/6309. Among Japanese manufacturers, NEC and Sharp have released PCs using the former, and Fujitsu and Hitachi have released using the latter.
　Most of the 8-bit machines that were sold as suitable for business had 64KB (~128KB) memory and two floppy disk drives of about 320KB (~640KB) as an external storage device. As a game machine, attention was focused on the graphic function rather than the performance of the CPU.

In the latter half of the 1980s, 8-bit machines were dominated by 16-bit machines such as IBM-PC.