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Adds some notes for a pending ADB implementation.

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This commit is contained in:
Thomas Harte 2020-11-01 14:49:04 -05:00
parent 2da71acefd
commit 53f60f7c87
2 changed files with 49 additions and 19 deletions
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40
Machines/Apple/AppleIIgs/ADB.cpp
View File

@ -13,29 +13,59 @@
using namespace Apple::IIgs::ADB;
uint8_t GLU::get_keyboard_data() {
return 0;
// The classic Apple II serial keyboard register:
// b7: key strobe.
// b6–b0: ASCII code.
return 0x00;
}
uint8_t GLU::get_mouse_data() {
// Alternates between returning x and y values.
//
// b7: 1 = button is up; 0 = button is down.
// b6: delta sign bit; 1 = negative.
// b5–b0: mouse delta.
return 0x80;
}
uint8_t GLU::get_modifier_status() {
// b7: 1 = command key pressed; 0 = not.
// b6: option key.
// b5: 1 = modifier key latch has been updated, no key has been pressed; 0 = not.
// b4: any numeric keypad key.
// b3: a key is down.
// b2: caps lock is pressed.
// b1: control key.
// b0: shift key.
return 0x00;
}
uint8_t GLU::get_data() {
// b0–2: number of data bytes to be returned.
// b3: 1 = a valid service request is pending; 0 = no request pending.
// b4: 1 = control, command and delete keys have been pressed simultaneously; 0 = they haven't.
// b5: 1 = control, command and reset have all been pressed together; 0 = they haven't.
// b6: 1 = ADB controller encountered an error and reset itself; 0 = no error.
// b7: 1 = ADB has received a response from the addressed ADB device; 0 = no respone.
return 0x00;
}
uint8_t GLU::get_status() {
// b7: 1 = mouse data register is full; 0 = empty.
// b6: 1 = mouse interrupt is enabled.
// b5: 1 = command/data has valid data.
// b4: 1 = command/data interrupt is enabled.
// b3: 1 = keyboard data is full.
// b2: 1 = keyboard data interrupt is enabled.
// b1: 1 = mouse x-data is available; 0 = y.
// b0: 1 = command register is full (set when command is written); 0 = empty (cleared when data is read).
return 0x00;
}
void GLU::set_command(uint8_t) {
printf("TODO: set ADB command\n");
void GLU::set_command(uint8_t command) {
printf("TODO: set ADB command: %02x\n", command);
}
void GLU::set_status(uint8_t) {
printf("TODO: set ADB status\n");
void GLU::set_status(uint8_t status) {
printf("TODO: set ADB status %02x\n", status);
}

28
Machines/Apple/AppleIIgs/AppleIIgs.cpp
View File

@ -299,20 +299,20 @@ class ConcreteMachine:
}
}
printf("%06x %s %02x", address, isReadOperation(operation) ? "->" : "<-", *value);
if(operation == CPU::WDC65816::BusOperation::ReadOpcode) {
printf(" a:%04x x:%04x y:%04x s:%04x e:%d p:%02x db:%02x pb:%02x d:%04x\n",
m65816_.get_value_of_register(CPU::WDC65816::Register::A),
m65816_.get_value_of_register(CPU::WDC65816::Register::X),
m65816_.get_value_of_register(CPU::WDC65816::Register::Y),
m65816_.get_value_of_register(CPU::WDC65816::Register::StackPointer),
m65816_.get_value_of_register(CPU::WDC65816::Register::EmulationFlag),
m65816_.get_value_of_register(CPU::WDC65816::Register::Flags),
m65816_.get_value_of_register(CPU::WDC65816::Register::DataBank),
m65816_.get_value_of_register(CPU::WDC65816::Register::ProgramBank),
m65816_.get_value_of_register(CPU::WDC65816::Register::Direct)
);
} else printf("\n");
// printf("%06x %s %02x", address, isReadOperation(operation) ? "->" : "<-", *value);
// if(operation == CPU::WDC65816::BusOperation::ReadOpcode) {
// printf(" a:%04x x:%04x y:%04x s:%04x e:%d p:%02x db:%02x pb:%02x d:%04x\n",
// m65816_.get_value_of_register(CPU::WDC65816::Register::A),
// m65816_.get_value_of_register(CPU::WDC65816::Register::X),
// m65816_.get_value_of_register(CPU::WDC65816::Register::Y),
// m65816_.get_value_of_register(CPU::WDC65816::Register::StackPointer),
// m65816_.get_value_of_register(CPU::WDC65816::Register::EmulationFlag),
// m65816_.get_value_of_register(CPU::WDC65816::Register::Flags),
// m65816_.get_value_of_register(CPU::WDC65816::Register::DataBank),
// m65816_.get_value_of_register(CPU::WDC65816::Register::ProgramBank),
// m65816_.get_value_of_register(CPU::WDC65816::Register::Direct)
// );
// } else printf("\n");
Cycles duration = Cycles(5);