Appendix D - Cd Command List, Name, Mnemonic

VCD Command List

APPENDIX D - CD COMMAND LIST

NOTE: arg or ards (argument or address) prefaces commands with an argument or an address parameter. If arg or ards is in ( ), then the parameter is optional.

COMMAND

Name	Mnemonic
Audio Control	arg	AD
Block Number		BK
Block Number Request		?B
Command Stack Data		BD
Download
Command Stack Data Upload		BU
CCR Mode Request		?M
CD Disc Status Request		?K
Clear		CL
Clear Screen		CS
Close		CO
Communication Control Set	arg	CM
Current Address Request		?A
Display Control	arg	DS
Error Code Request		?E
Index		IX
Index Number Request		?I
Input Barcode Data Request		#B
Input Number Request		?N
Input Unit Request		#I
Key Lock	arg	KL
Lead Out Symbol		LO
LVP Model Name Request		?X
Open		OP
Pause		PA
Play	(adrs)	PL
Player Active Mode Request		?P
Player Region Code Request		?H
Print Character	arg	PR
Register A Request		$A
Register A Set (Display)	arg	RA
Reject		RJ
Scan Forward		NF
Scan Reverse		NR
Scan Stop		NS
Search	adrs	SE
Stack Group Set	arg	GP
Start		SA
Stop Marker	adrs	SM
Time		TM

- 84

RS-232C specifications

The Pioneer RS-232C is a significant component in the realm of communication technology, especially known for its application in serial communications. Initially introduced in the 1960s as part of the EIA-232 standard, RS-232C has evolved through various iterations to become a foundational interface for connecting data communication equipment (DCE) with data terminal equipment (DTE). This article outlines its main features, technologies, and characteristics.

One of the hallmark features of RS-232C is its ability to facilitate point-to-point communication. It allows for a direct link between two devices, making it suitable for a variety of applications, including modems, printers, computers, and other peripherals. The RS-232C interface typically uses a 25-pin connector, although a 9-pin variant is also common in many modern devices. This interface is based on serial communications, where bits are sent sequentially over a single channel, leveraging fewer wires compared to parallel communication methods.

In terms of technology, RS-232C operates primarily at voltage levels of +12V to -12V, which provide the necessary signaling for data transmission. The standard supports baud rates ranging from 300 to 115200 bps, accommodating various data transfer speeds depending on the needs of the hardware involved. RS-232C defines various electrical characteristics and timing requirements, ensuring robust performance over relatively short distances, typically up to 15 meters, depending on the baud rate.

Another essential aspect of the RS-232C standard is its use of asynchronous communication, allowing devices to transmit data without having to synchronize their clocks. Each data packet typically consists of a start bit, a predefined number of data bits (usually 7 or 8), an optional parity bit for error-checking, and one or more stop bits. This method allows for error detection and ensures data integrity during transmission.

Despite its age, the RS-232C interface remains relevant, especially in industrial applications, instrumentation, and legacy systems. Its simplicity, low cost, and widespread acceptance make it a versatile choice for connecting various devices, even in a world increasingly dominated by USB and other modern interfaces.

In conclusion, the Pioneer RS-232C is a remarkable testament to the enduring nature of serial communication technology. Its straightforward design, reliability, and ease of integration continue to make it a staple in numerous applications, underscoring its significance in the landscape of data communication.