YM2612: Difference between revisions
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(Created page with "=Port= ==Writing== {|class="regdef" |'''Description''' |'''Zone''' |'''Address''' |- |rowspan="2"|Part I address (A0) |Z80 |$4000 |- |M68K |$A04000 |- |rowspan="2"|Part I ad...") |
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= | ==Registers== | ||
==Writing== | [[YM2612 Registers]] | ||
==Port== | |||
===Writing=== | |||
{|class="regdef" | {|class="regdef" | ||
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==Reading== | ===Reading=== | ||
Reading from any of the port will return the status register. | Reading from any of the port will return the status register. | ||
Revision as of 01:25, 4 August 2012
Registers
Port
Writing
| Description | Zone | Address |
| Part I address (A0) | Z80 | $4000 |
| M68K | $A04000 | |
| Part I address (D0) | Z80 | $4001 |
| M68K | $A04001 | |
| Part I address (A1) | Z80 | $4002 |
| M68K | $A04002 | |
| Part I address (D1) | Z80 | $4003 |
| M68K | $A04003 |
Reading
Reading from any of the port will return the status register.
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| Def | 1 : Busy
0 : Ready for new data |
Unused | 1 : Timer A Overflow
0 : Not overflow | 1 : Timer B Overflow
0 : Not overflow |
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