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appleramdac: Allow read from CLUT.

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This commit is contained in:
joevt 2024-02-18 05:06:53 -08:00 committed by dingusdev
parent 7c203b40c8
commit 2d1616894d
1 changed files with 13 additions and 0 deletions
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13
devices/video/appleramdac.cpp
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@ -49,6 +49,16 @@ uint16_t AppleRamdac::iodev_read(uint32_t address) {
this->name.c_str(), this->dac_addr);
}
break;
case RamdacRegs::CLUT_DATA:
if (this->comp_index == 0) {
this->get_clut_entry_cb(this->dac_addr, this->clut_color);
}
this->comp_index++;
if (this->comp_index >= 3) {
this->dac_addr++; // auto-increment CLUT address
this->comp_index = 0;
}
break;
default:
LOG_F(WARNING, "%s: read from unsupported register at 0x%X",
this->name.c_str(), address);
@ -117,6 +127,9 @@ void AppleRamdac::iodev_write(uint32_t address, uint16_t value) {
}
break;
case RamdacRegs::CLUT_DATA:
if (this->comp_index == 0) {
this->get_clut_entry_cb(this->dac_addr, this->clut_color);
}
this->clut_color[this->comp_index++] = value;
if (this->comp_index >= 3) {
this->set_clut_entry_cb(this->dac_addr, this->clut_color);