Fix test sound cards for mb-audit 1.50

[tomcw]

AppleWin HEAD

mb-audit 1.50: (test "A")

• SDM: NG

  Test: 21 0C 00
  Exp:33, Act:FF
  AY reg dump:
  000000..00
  000102..0D
  FFFFFF..FF
  FFFFFF..FF

• MEGA Audio: NG

  Test: 21 0C 00
  Exp:00, Act:FF
  AY reg dump:
  FFFFFF..FF
  FFFFFF..FF
  FFFFFF..FF
  FFFFFF..FF

AppleWin 1.30.15

mb-audit 1.42: (test "A")

• SDM: OK
• MEGA Audio: OK (warning: 21 14 00 55 00)

mb-audit 1.50: (test "A")

• SDM: OK (warning: 21 14 00 FF 00)
  • Ctrl+Reset: OK (warning: 13 F1 08 FF 04)
• MEGA Audio: NG

  Test: 21 0C 00
  Exp:33, Act:00
  AY reg dump:
  000000..00
  000000..00
  000000..00
  000000..00

[tomcw]

Fix MEGA Audio: 56cc7793517a746d9e9db51ec0da8172adb34dbe

(Ignore mb-audit version - as 1.50 needed a fix too to avoid test 21,0C)

Warnings: (these are expected for MEGA Audio)

1. (21,14,00) TestAYReadHiZ: read 6522.IRA (PortA): expect FF; actual 00
2. (13,F1,08) After CTRL+RESET, read 6522.IRB: expect FF; actual 00

[tomcw]

Fix SD Music: 53fddfe41ab0d29d3080811600cd7e5abfb245a3

[tomcw]

s4=SD Music and s5=MEGA Audio