mirror of https://github.com/pyrollo/vinace.git
75 lines
2.2 KiB
C++
75 lines
2.2 KiB
C++
/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */
|
|
/*
|
|
* Vinace
|
|
* Copyright (C) P.Y. Rollo 2009 <dev@pyrollo.com>
|
|
*
|
|
* Vinace is free software: you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* Vinace is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
|
* See the GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include "c-graphic-mode-unit.hpp"
|
|
|
|
//
|
|
// Graphic mode unit
|
|
//
|
|
// See "Apple IIe Technical Reference Manual" page 29 (PDF p63)
|
|
|
|
/*
|
|
C01A 49178 RDTEXT ECG R7 Status of Text/Graphics
|
|
C01B 49179 RDMIXED ECG R7 Status of Full Screen/Mixed Graphics
|
|
C01C 49180 RDPAGE2 ECG R7 Status of Page 1/Page 2
|
|
C01D 49181 RDHIRES ECG R7 Status of LoRes/HiRes
|
|
|
|
C050 49232 TXTCLR OECG WR Display Graphics
|
|
C051 49233 TXTSET OECG WR Display Text
|
|
C052 49234 MIXCLR OECG WR Display Full Screen
|
|
C053 49235 MIXSET OECG WR Display Split Screen
|
|
C054 49236 TXTPAGE1 OECG WR Display Page 1
|
|
C055 49237 TXTPAGE2 OECG WR Display Page 2
|
|
C056 49238 LORES OECG WR Display LoRes Graphics
|
|
C057 49239 HIRES OECG WR Display HiRes Graphics
|
|
*/
|
|
|
|
void CGraphicModeUnit::reset() {
|
|
s_text = false;
|
|
s_mixed = false;
|
|
s_page2 = false;
|
|
s_hires = false;
|
|
notifyUpdate();
|
|
}
|
|
|
|
void CGraphicModeUnit::access(BYTE addr) {
|
|
switch(addr) {
|
|
CASE_SWITCH(text, 0x50, 0x51);
|
|
CASE_SWITCH(mixed, 0x52, 0x53);
|
|
CASE_SWITCH(page2, 0x54, 0x55);
|
|
CASE_SWITCH(hires, 0x56, 0x57);
|
|
default:return;
|
|
}
|
|
notifyUpdate();
|
|
}
|
|
|
|
void CGraphicModeUnit::write(BYTE addr, BYTE byte) {
|
|
access(addr);
|
|
}
|
|
|
|
BYTE CGraphicModeUnit::read(BYTE addr) {
|
|
access(addr);
|
|
switch (addr) {
|
|
CASE_READ(text, 0x1A);
|
|
CASE_READ(mixed, 0x1B);
|
|
CASE_READ(page2, 0x1C);
|
|
CASE_READ(hires, 0x1D);
|
|
}
|
|
return dummy_byte();
|
|
} |