Phasor card: remaining things to support

[tomcw]

A list of remaining items to support:

• In Phasor native mode, investigate how SSI263 IRQ is cleared
• Cmd line to add a Phasor card (eg. -sN phasor)
  • optionally specify DIP SW1..4 for Hardware Mode Selection (eg. SW Selectable, Echo+, Mockingboard)
  • eg. -sN phasor[:SSSS], where each S is 0 or 1; and/or -sN phasor[:SW|E+|MB]
• Support Phasor DIP SW setting in code & save-state
• Investigate whether the Echo+'s 2 AYs' latch addresses can be set independently and write to different AY regs
• Fix mb-audit's TestAYTones for Echo+
  • Manually set Phasor to Echo+ mode (C0C7 for slot 4). mb-audit 1.50 correctly detects "E" and all tests pass, but the manual Tone tests are just silent under AppleWin. NB. this works on real Phasor h/w (tones output to both speakers). Fixed in 001f04c
  • see Improve support for Phasor's Echo+ mode tomcw/mb-audit#11
• 6522's AY RESET always resets both attached AYs, regardless of Phasor mode or chip-select bits.
• mb-audit 1.52: for Phasor enable "QWE" -> Echo+ / Mockingboard
  • Real Phasor: both E+/MB play tones at half frequency
  • AppleWin 1.30.18.0: E+ is silent (wrong), but MB play tone at half freq (correct)

[tomcw]

In Phasor native mode, investigate how SSI263 IRQ is cleared

mb-audit 1.53 (not released yet) includes tests: tomcw/mb-audit@87739af

NB. AppleWin 1.30.18 fails this new test with error:

Test: 41:05:03
Expected 00 Actual 80

(This is an expected failure, since AppleWin didn't support SSI263 reg1&2 deasserting the IRQ)
SubTestNum=03 means that the write to SSI263 reg1 didn't clear the IRQ.
Expected D7=0(00), but Actual still has D7=1(80)