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added strobing of copjmp1 after setting list 

not strobing copjmp1 can lead to compatibility issues
This commit is contained in:
Wei-ju Wu 2016-09-21 22:06:02 -07:00
parent b31f5a40aa
commit 1235d15acb
3 changed files with 15 additions and 0 deletions
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6
hardware/playfield1.c
View File

@ -27,6 +27,7 @@
* A simple setup to display a playfield with a depth of 1 bit.
*/
extern struct Custom custom;
char VERSION_STRING[] = "\0$VER: playfield1 1.0 (21.09.2016)\0";
static UWORD __chip coplist[] = {
COP_MOVE(BPL1PTH, 0),
@ -81,6 +82,11 @@ int main(int argc, char **argv)
// and point to the copper list
custom.cop1lc = (ULONG) coplist;
// strobe the COPJMP1 register to make sure the system is using
// copper list 1 (I found out that leaving this out can lead to
// strange effects on an emulated 4000 system)
custom.copjmp1 = 1;
waitmouse();
reset_display();

2
hardware/sprites.c
View File

@ -7,6 +7,7 @@
* A simple setup to display a sprite.
*/
extern struct Custom custom;
char VERSION_STRING[] = "\0$VER: sprites 1.0 (21.09.2016)\0";
static UWORD __chip coplist_pal[] = {
COP_MOVE(SPR0PTH, 0x0000),
@ -44,6 +45,7 @@ int main(int argc, char **argv)
coplist_pal[3] = (((ULONG) spdat0) >> 16) & 0xffff;
custom.cop1lc = is_pal ? (ULONG) coplist_pal : (ULONG) coplist_ntsc;
custom.copjmp1 = 1;
waitmouse();

7
hardware/startup.c
View File

@ -14,6 +14,7 @@
* A great starting point to use as a template for demos and games.
*/
extern struct Custom custom;
char VERSION_STRING[] = "\0$VER: startup 1.0 (21.09.2016)\0";
static UWORD __chip coplist_pal[] = {
COP_MOVE(BPLCON0, BPLCON0_COMPOSITE_COLOR),
@ -41,8 +42,14 @@ int main(int argc, char **argv)
struct Task *current_task = FindTask(NULL);
BYTE old_prio = SetTaskPri(current_task, TASK_PRIORITY);
BOOL is_pal = init_display();
custom.cop1lc = is_pal ? (ULONG) coplist_pal : (ULONG) coplist_ntsc;
// strobe the COPJMP1 register to make sure the system is using
// copper list 1 (I found out that leaving this out can lead to
// strange effects on an emulated 4000 system)
custom.copjmp1 = 1;
waitmouse();
reset_display();