. Default to SSI263AP (ie. with reset fixed)
. Support SSI263 type set from cmd-line: SSI263P, SSI263AP or empty
. Support SC01 type set from cmd-line: SC01 or empty
. Save-state: MB v14: support SSI263 & SC01 type (including Empty)
Better support the IIe's aux slot when it's empty or has the 80-col(1KiB) card.
- any h/w using this alternate CPU emulation, (ie. aux=empty or 80-col(1KiB)), then the 'mem' cache is completely bypassed.
Debugger: change all the direct 'mem' accesses to go via ReadByteFromMemory().
TestCPU6502: test the alt CPU emulation code too.
. Save-state: Mockingboard v13: deprecate SS_YAML_KEY_VOTRAX_PHONEME (from Mockingboard card).
. Consolidate the save/loading of the SSI263 & SC01 state into single function (in class SSI263).
. Defer each SSI263's DSInit() until SSI263::Play() & Update() are called.
. Refactor DSInit(): rename to Init() for consistency with MockingboardCardManager class.
. m_currentActivePhoneme: never return to -1 value, instead OR with kPhonemeLeadoutFlag.
. Save-state: Mockingboard v13: deprecate SS_YAML_KEY_SSI263_ACTIVE_PHONEME.
. A phoneme will continue playing back infinitely; unless the phoneme is changed or CTL=1.
. Reset doesn't affect SSI263/SC01 (so phonemes continue to play).
. CTL=1 sets "PD" (Power Down / "standby") mode, also set at power-on.
. CTL=0 brings device out of "PD" mode, the mode will be set to DR1,DR0 and the phoneme P5-P0 will play.
. Setting mode to DR1:0 = %00 just disables A/!R (ie. disables interrupts), but otherwise retains the previous DR1:0 mode.
. RESET is not connected to !PD/!RST pin 18.
. Support edge-case where RESET can enable ints & assert IRQ.
. Power-on: PD=1 (so D7=0), reg4 (Filter Freq)=0xFF.
. Support SSI263 IRQ and D7 on a Phasor mode change (including Echo+).
. $Csxx I/O mapping (same for Mockingboard and Phasor mode).
Other:
. SSI263 save-state: support SC01 as a sub-unit of the card.
. 6522: Fix reg $F (ORA w/HS) to be identical to reg $1 (ORA).
Differences compared to Mockingboard:
. Only one 6522
. AY8913 is selected by address b7
Add cmd line: -sN sdmusic
Add cmd line: -mb-audit (to enable selection of additional sound cards, eg. for mb-audit)
Differences compared to Mockingboard:
. TIMER1 underflows to $FFFE before it's reloaded with latch.
. TIMER1's LATCH=$0000 gets interpreted as $FFFF.
. Partial TIMER2 support: IFR.T2 gets set on underflow. But T2 reads as 0x00FF.
. AY register reads are unsupported (always read as 0).
Config->Sound: show 'MEGA Audio' in drop-down menus only if it was specified on the cmd line.
. For MB: isChipSelected[0] = true. So do this on Reset() or for Phasor when switching to MB mode.
. Add "Notes on Phasor's AY-3-8913 chip-select & r/w"
. Refactor some common code into SY6522::UpdatePortAForHiZ()
. add 2nd nAYCurrentRegister (Reg. Address Latch) for 2nd AY8913.
. add support for the odd Phasor logic when doing discrete LATCH and WRITE PSG functions.
(keep in sync with mb-audit v1.3)
