Apple-2-Tools
/
Steve2
mirror of https://github.com/trudnai/Steve2.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

Fixed Text Page switching

This commit is contained in:
tudnai 2020-05-02 10:36:21 -07:00
parent 54a02f3ea1
commit 040ee3af43
1 changed files with 14 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
src/dev/mem/mmio.h
View File

@ -324,28 +324,32 @@ void resetMemory() {
static uint8_t page2 = 0;
static uint8_t * activePage = Apple2_64K_RAM + 0x400;
void textPageSelect() {
uint8_t * shadow = Apple2_64K_MEM + 0x400;
if ( page2 != MEMcfg.txt_page_2 ) {
page2 = MEMcfg.txt_page_2;
static uint8_t * newPage = NULL;
if ( MEMcfg.is_80STORE && MEMcfg.txt_page_2 ) {
// save the content of Shadow Memory
memcpy(Apple2_64K_RAM + 0x400, shadow, 0x400);
// load the content of Video Page 2
memcpy(shadow, Apple2_64K_AUX, 0x400);
newPage = Apple2_64K_AUX + 0x400;
}
else {
// save the content of Shadow Memory
memcpy(Apple2_64K_AUX + 0x400, shadow, 0x400);
newPage = Apple2_64K_RAM + 0x400;
}
if ( activePage != newPage ) {
if ( activePage ) {
// save the content of Shadow Memory
memcpy(activePage, shadow, 0x400);
}
// load the content of Video Page 2
memcpy(shadow, Apple2_64K_RAM, 0x400);
memcpy(shadow, newPage, 0x400);
activePage = newPage;
}
}