MV1A: Difference between revisions
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#OP0 Clearly shows activity on sound | #OP0 Clearly shows activity on sound | ||
#SH1 and SH2 steady 55.56kHz signals | #SH1 and SH2 steady 55.56kHz signals | ||
Mute MV1A | |||
#rad0 18.66Khz signal | |||
#rad1-3 0.25V 113khz triangle waveform | |||
#rad4-6 18.66kHz signal | |||
*A1 from Z80 looks ok | |||
*A0 from Z80 looks ok | |||
*/RD and /CS always high, not normal - signals traced to custom SNK Custom "NEO-D0 9535 B24" | |||
*/RD PIN 59 on YM2610 traces to pin 48 | |||
*/WR PIN 58 on YM2610 traces to pin 47 | |||
*/CS PIN 57 on YM2610 traces to pin 49 | |||
Latest revision as of 21:59, 23 March 2011
Mute Board[edit]
On MV4FS YM2610
- Datalines D0-D7 busy and healty on 4slot
- RAD0-RAD7 healthy static about 113kHz signals
- OP0 Clearly shows activity on sound
- SH1 and SH2 steady 55.56kHz signals
Mute MV1A
- rad0 18.66Khz signal
- rad1-3 0.25V 113khz triangle waveform
- rad4-6 18.66kHz signal
- A1 from Z80 looks ok
- A0 from Z80 looks ok
- /RD and /CS always high, not normal - signals traced to custom SNK Custom "NEO-D0 9535 B24"
- /RD PIN 59 on YM2610 traces to pin 48
- /WR PIN 58 on YM2610 traces to pin 47
- /CS PIN 57 on YM2610 traces to pin 49
