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Stubs in a couple more registers.

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PC now hits $0000. Likely a bug.
This commit is contained in:
Thomas Harte 2020-11-09 21:54:25 -05:00
parent 7e106c6add
commit 54352cb1cb
4 changed files with 32 additions and 1 deletions
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2
Machines/Apple/AppleIIgs/ADB.cpp
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@ -87,7 +87,7 @@ uint8_t GLU::get_status() {
// b0: 1 = command register is full (set when command is written); 0 = empty (cleared when data is read).
const uint8_t status =
(pending_response_.empty() ? 0 : 0x20); // Data is valid if a response is pending.
printf("ADB get status : %02x\n", status);
// printf("ADB get status : %02x\n", status);
return status;
}

21
Machines/Apple/AppleIIgs/AppleIIgs.cpp
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@ -391,6 +391,26 @@ class ConcreteMachine:
// TODO: begin analogue channel charge.
break;
// Monochome/colour register.
case 0xc021:
// "Uses bit 7 to determine whether composite output is colour 9) or gray scale (1)."
if(is_read) {
*value = video_->get_composite_is_colour() ? 0x00 : 0x80;
} else {
video_->set_composite_is_colour(!(*value & 0x80));
}
break;
// Language select. (?)
case 0xc02b:
if(is_read) {
*value = language_;
} else {
language_ = *value;
}
break;
// Slot select.
case 0xc02d:
// b7: 0 = internal ROM code for slot 7;
// b6: 0 = internal ROM code for slot 6;
@ -580,6 +600,7 @@ class ConcreteMachine:
uint8_t card_mask_ = 0x00;
bool test_mode_ = false;
uint8_t language_ = 0;
};
}

7
Machines/Apple/AppleIIgs/Video.cpp
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@ -281,3 +281,10 @@ void VideoBase::set_text_colour(uint8_t colour) {
text_colour_ = appleii_palette[colour >> 4];
background_colour_ = appleii_palette[colour & 0xf];
}
void VideoBase::set_composite_is_colour(bool) {
}
bool VideoBase::get_composite_is_colour() {
return true;
}

3
Machines/Apple/AppleIIgs/Video.hpp
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@ -41,6 +41,9 @@ class VideoBase: public Apple::II::VideoSwitches<Cycles> {
void set_border_colour(uint8_t);
void set_text_colour(uint8_t);
void set_composite_is_colour(bool);
bool get_composite_is_colour();
/// Sets the scan target.
void set_scan_target(Outputs::Display::ScanTarget *scan_target);