diff options
| author | dweller <dweller@cabin.digital> | 2025-03-26 20:37:01 +0200 |
|---|---|---|
| committer | dweller <dweller@cabin.digital> | 2025-03-26 20:37:01 +0200 |
| commit | 750cd23d7afac165502defa1d259ace00ca0e414 (patch) | |
| tree | ff28a5649a4ba2b19a93c924536634106b65816e /sources/meta/exec.c | |
| parent | 202712187e6ea7ce39dafad744c1e729e5279db6 (diff) | |
clean up chip-8 into its own file
Diffstat (limited to 'sources/meta/exec.c')
| -rw-r--r-- | sources/meta/exec.c | 34 |
1 files changed, 28 insertions, 6 deletions
diff --git a/sources/meta/exec.c b/sources/meta/exec.c index b913390..a39aef2 100644 --- a/sources/meta/exec.c +++ b/sources/meta/exec.c @@ -1,11 +1,33 @@ -/* FIXME: add a one time init and deinit to generate macro */ -#define BEGIN \ -do{ \ - chip8* c8 = usrdat; \ - assert(c8); - +#define BEGIN do{ #define END }while(0) +#define X_C8_PRELUDE \ + chip8* c8 = usrdat; \ + assert(c8); \ +\ + if(c8->pc >= sizeof(c8->mem)) \ + { \ + report(ERR, "CHIP-8: PC(%04X) Overflow!\n", c8->pc); \ + c8->running = false; \ + } \ +\ + if(c8->pc & 0x0001) \ + { \ + report(ERR, "CHIP-8: PC(%04X) is not aligned!\n", c8->pc); \ + c8->running = false; \ + } + +#define X_C8_EPILOGUE \ +BEGIN \ + c8->cycles++; \ + if((c8->cycles % C8_CYCLES_PER_FRAME) == 0) \ + { \ + if(c8->dt) c8->dt--; \ + if(c8->st) c8->st--; \ + } \ + c8->pc += 2; \ +END + #define X_C8_ILL \ BEGIN \ c8->running = false; \ |