Difference between revisions of "CP/M 2.2"
ZoeRobinson (Talk | contribs) (Added a second link for the CP/M 2.2 manual, since the first one isn't working for me and may be broken.) |
|||
| Line 4: | Line 4: | ||
CP/M 2.2 was the first CP/M avaiable for the Amstrad CPC. A minimum requirement to run CP/M was a disc drive therefore CP/M 2.2 came bundled with the Amstrad [[DDI-1]] discdrive, making it possible to run CP/M 2.2 on the Amstrad CPC 464. Later when the Amstrad CPC 664 was released, CP/M 2.2 came together with this machine as the 664 had a built in discdrive. | CP/M 2.2 was the first CP/M avaiable for the Amstrad CPC. A minimum requirement to run CP/M was a disc drive therefore CP/M 2.2 came bundled with the Amstrad [[DDI-1]] discdrive, making it possible to run CP/M 2.2 on the Amstrad CPC 464. Later when the Amstrad CPC 664 was released, CP/M 2.2 came together with this machine as the 664 had a built in discdrive. | ||
| + | |||
| + | == Implementation == | ||
| + | === Amstrad CPM 2.2 === | ||
| + | |||
| + | * Amstrad CPM2.2 uses Amstrad's "System" format. This is 40 tracks, 1 side, 9 sectors per track numbered &41-&49. There are two reserved tracks, then the directory which has 64 entries, and then the data area. | ||
| + | |||
| + | * CP/M is booted by a RSX command "|CPM" which is implemented by the AMSDOS ROM (the standard disc ROM in the DDI-1, CPC664, CPC6128 and 6128Plus). | ||
| + | |||
| + | 1. The |CPM command loads track 0, side 0, sector 41 into ram at &100 and jumps to it. This is the boot sector. (The boot sector occupies &100-&2ff). | ||
| + | |||
| + | 2. The boot code copies the BIOS jumpblock from the AMSDOS rom to &500. (In the AMSDOS ROM this is located at &C17F. The actual address is passed to the boot rom in BC). | ||
| + | |||
| + | 3. The boot code then loads track 0, side 0, sector 42 into ram at &300 which is the "configuration" sector which defines colours, mode, and keyboard translation tables. (The configuration sector occupies &300-&4ff). | ||
| + | |||
| + | 4. Finally the boot code calls CPM "WBOOT". | ||
| + | |||
| + | * WBOOT loads multiple sectors from the reserved tracks, this is the platform independent CPM system (BDOS etc). | ||
== Download == | == Download == | ||
Revision as of 07:50, 24 April 2018
Operating system for the Intel 8080 and Zilog Z80 based computers by Digital Research
CP/M 2.2 was the first CP/M avaiable for the Amstrad CPC. A minimum requirement to run CP/M was a disc drive therefore CP/M 2.2 came bundled with the Amstrad DDI-1 discdrive, making it possible to run CP/M 2.2 on the Amstrad CPC 464. Later when the Amstrad CPC 664 was released, CP/M 2.2 came together with this machine as the 664 had a built in discdrive.
Implementation
Amstrad CPM 2.2
- Amstrad CPM2.2 uses Amstrad's "System" format. This is 40 tracks, 1 side, 9 sectors per track numbered &41-&49. There are two reserved tracks, then the directory which has 64 entries, and then the data area.
- CP/M is booted by a RSX command "|CPM" which is implemented by the AMSDOS ROM (the standard disc ROM in the DDI-1, CPC664, CPC6128 and 6128Plus).
1. The |CPM command loads track 0, side 0, sector 41 into ram at &100 and jumps to it. This is the boot sector. (The boot sector occupies &100-&2ff).
2. The boot code copies the BIOS jumpblock from the AMSDOS rom to &500. (In the AMSDOS ROM this is located at &C17F. The actual address is passed to the boot rom in BC).
3. The boot code then loads track 0, side 0, sector 42 into ram at &300 which is the "configuration" sector which defines colours, mode, and keyboard translation tables. (The configuration sector occupies &300-&4ff).
4. Finally the boot code calls CPM "WBOOT".
- WBOOT loads multiple sectors from the reserved tracks, this is the platform independent CPM system (BDOS etc).
Download
- CP/M 2.2 (DSK for Emulators)
Manual
- Entire CP/M 2.2 Manual on the Web
- Entire CP/M 2.2 Manual (in case the above link doesn't work for you)
- CP/M 2.2 - Manual
Page 1
Page 2
Page 3
Page 4
Page 5
Page 6
- CPM22 p7.jpg
Page 7
- CPM22 p8.jpg
Page 8
- CPM22 p9.jpg
Page 9
- CPM22 p10.jpg
Page 10
- CPM22 p11.jpg
Page 11
- CPM22 p12.jpg
Page 12
- CPM22 p13.jpg
Page 13
- CPM22 p14.jpg
Page 14
- CPM22 p15.jpg
Page 15
- CPM22 p16.jpg
Page 16
- CPM22 p17.jpg
Page 17
- CPM22 p18.jpg
Page 18
- CPM22 p19.jpg
Page 19
- CPM22 p20.jpg
Page 20
