★ PROGRAMMER'S GUIDE ★ Virtual CD system
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Virtual CD System User's Manual / Chapter 3 CD Emulator VCDEMU

3.2.1 Log window

The log window displays messages in two formats.

● Command display
For command display, the message is divided into fields. The meanings of the fields are as follows in order from the left. There is a display for identifying the field in the line just below the top bar.

Command Atime FAD (10) Rtc NopOutPREFD
Play 00:02:00 96 0x80 00230 000001000
Stop 00:00:00 00 0x80 00015 001011000
Pause 00:00:00 00 0x80 00030 001011000
Play2 00:10:05 2F3 0x80 00224 000001000

◆ Command
The command name is displayed. The display of identification is "Command". A number may be added to the end of the command name. This indicates whether it is double speed or not. It means that 2 received the command for double speed.

◆ Absolute time
When a command with an access position as an argument is received, the value of that argument is displayed. The identification display is "A time". Its format is mm: ss: ff, where mm stands for minutes, ss stands for seconds, and ff stands for frames. For commands that do not have an access position as an argument, 00:00:00 is displayed.

◆ Frame address
Displays the absolute time in frames in decimal or hexadecimal (switchable, default is decimal). For example, when the absolute time is displayed as 00:02:15, this field is displayed as 165 (75 x 2 + 15). The identification display is "FAD (10)".

◆ Message
Displays the number of NOP commands and the number of frames of transferred data. The number of NOP commands is the number received between receiving the command displayed immediately before and receiving the command displayed on this line.
The number of frames is the number sent to the VCD I / F board after receiving the command with the data transfer displayed immediately before and receiving the command displayed on this line. Therefore, the value is larger than the number received in the target box. The display of identification is "Message".

◆ Status
Shows the status of the I / F board when the command is received. Another display is "Status: PREFD". Five 0 or 1 values are lined up. From the left

When -1, it indicates the Play status.
It is always 0. It is not set on the VCD I / F board.

When it is -1, it indicates the Ready status.
If it is normal, it is 1.

When -1, it indicates the Error status.
Indicates that some error has occurred.

When -1, it indicates the DiskEnd (Finish) status.
It is always 0. It is not set on the VCD I / F board.

When -1, it indicates the DmaEnd state.
It is used as a trigger for transfer during playback.

● Other messages
Other messages, such as error messages, are not separated into fields.

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★ PROGRAMMER'S GUIDE ★ Virtual CD system
Copyright SEGA ENTERPRISES, LTD ,. 1997