Specifications

S1C62N82 TECHNICAL HARDWARE EPSON I-77
CHAPTER 4: PERIPHERAL CIRCUITS AND OPERATION (Melody Generator)
D1 (TEMPC):
This is the bit that selects the tempo. 2 types of tempo
selected by mask option may be changed. The timing
of tempo change is not done when data is written on
this bit but rather, when the next melody begins.
D2 and D3 (CLKC0 and CLKC1):
This is the bit that changes playing speed. By the
combination of CLKC0 and CLKC1, 4 types of playing
speed may be selected. The playing speed for the
selectable tempo listed in Table 4.11.7 is the normal
speed; playing speeds which are 8, 16 and 32 times
the normal speed may also be selected. This is useful
in generating sound effects. For details, see "Playing
tempo".
MELC
(D0)
ON/OFF
control
circuit
TEMPC
(D1)
CLKC0
(D2)
CLKC1
(D3)
Data bus
Address "0F2H"
Playing speed
control signal
Tempo control
signal
ON/OFF
control signal
End-of-melody signal
Fig. 4.11.3
Controller
Since playing speed is modified simultaneously with data writing
on these bits, caution must be observed when operating these
bits in the middle of a playing.
Note