Page zero:
This refers to the region of memory in a CP/M environment between 0000Hex and 0100Hex that is used to hold vital system parameters.
Physical device:
An actual device, consisting of hardware, that exists. Physical devices may be represented by logical devices.
Primitives:
Procedures, operations or commands that make up Dr. Logo; the
Procedure:
A series of expressions or program statements that dictate how to perform a particular task.
Prompt:
A short message or character sequence reminding the user that some type of input is expected. For example, the CP/M prompt is the > and the Dr. Logo prompt is the ? character.
Random access:
The ability to read and write information in memory or on a disc in any desired order.
Read only R/O:
An attribute assigned to a disc, a disc file or a disc drive that prevents writing or changing of data.
Read write R/W:
An attribute assigned to a disc, a disc file or a disc drive that allows both reading and writing of data.
Record:
A group of bytes in a file. CP/M uses 128 byte records.
Sector:
A block of data on a disc. The AMSTRAD disc system uses a sector size of 512 bytes.
Single sided:
Refers to a disc which has only one side available for data storage.
AMSTRAD Disc Drive & Interface | Appendix 1.4 |
