Preliminary
HTG1390
Mnemonic
Table Read
READ R4A
READ MR0A
READF R4A
READF MR0A
Sound Control
SOUND n
SOUND A
SOUND ONE
SOUND LOOP
SOUND OFF
Miscellaneous
HALT
Description
Read ROM code of current page to R4 & ACC
Read ROM code of current page to M(R1,R0), ACC
Read ROM code of page F to R4 & ACC
Read ROM code of page F to M(R1,R0),ACC
Activate SOUND channel n
Activate SOUND channel with ACC
Turn on SOUND one cycle
Turn on SOUND repeat cycle
Turn off SOUND
Enter power down mode
Byte Cycle CF
1
2
—
1
2
—
1
2
—
1
2
—
2
2
—
1
1
—
1
1
—
1
1
—
1
1
—
2
2
—
15
17th Nov ’98