AY regs: ENABLE(bits 7-6), PORTA, PORTB: support depends on AY chip type
Add cmd line: -sN ay-socketX <empty|ay8910|ay8912|ay8913|ym2149>
Save-state: Mockingboard v15: add type for AY/YM
1. Registry functions
The set of functions are changed to consistently use bool arguments.
The macros are changed to inline functions to improve type checking.
RegSaveValue() are overloaded with help of templates to reduce
typecasting at call sites. For instance, bool value would be converted
consistently instead of relying on call sites to convert bool to int values.
2. Memory functions
BOOL usages were unnecessary. Mostly internal usages which can simply be bool.
3. FrameBase
Some member variables are changed to bool.
BOOL was used because of those Registry functions.
Additional changes:
- Some expressions are forced to be bool when assigning to bool variables.
. 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)
tomcw
Kelvin Lee
Andrea