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■ Slot status register

MSLC (W); MonitorSLot Call
Specify the slot number you want to monitor in the “CA” register. "0H" becomes "SLOT0", and "1FH" becomes "SLOT31".
CA (R); Call Address
The slot with the number set in this register can read the address of the currently read waveform data as the relative number of samples (sample number = number of waveform data samples) from "SA" (start address) .
Since the LSB (least significant bit) of the value that can be read here indicates 4K (4096) samples, when the read value is "1H", the monitored slot must have a waveform address of at least 4K samples from "SA" It is reading.

Sound memory configuration register

MEM4MB (W); MEMory 4MBit
Specify the amount of memory connected to SCSP.

Table 4.32 Memory capacity
MEM4MB Memory capacity
0 Use 1Mbit DRAM
1 Use 4Mbit DRAM

Figure 4.58 Memory address mapping diagram

MIDI register

SCSP has a MIDI serial interface with a transfer rate of 31.25Kbps. However, MIDI peripheral circuits and MIDI DIN connectors are not installed, so MIDI applications cannot be created.
∙ MIDI interface block diagram is shown in Figure 4.59.

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