* [9front] [PATCH] games/gb: fix timer divider for input clock 0
@ 2021-02-03 8:46 Michael Forney
0 siblings, 0 replies; only message in thread
From: Michael Forney @ 2021-02-03 8:46 UTC (permalink / raw)
To: 9front
According to [0], input clock 0 should divide by 1024=2¹⁰, not 2¹².
This caused audio to run at quarter-speed in one game I tried.
[0] https://gbdev.io/pandocs/#ff07-tac-timer-control-r-w
---
diff 07a27ca966dafa2cf22d97ccb2519d16604bdc81 7d37c636636253b74d3d2260e991cd78664ce1e9
--- a/sys/src/games/gb/ev.c Fri Jan 29 01:31:59 2021
+++ b/sys/src/games/gb/ev.c Wed Feb 3 00:46:52 2021
@@ -8,7 +8,7 @@
extern Event evsamp, chev[4];
Event *events[NEVENT] = {&evhblank, &evtimer, &evenv, &evsamp, &chev[0], &chev[1], &chev[2], &chev[3]};
Event *elist;
-static int timshtab[4] = {12, 4, 6, 8}, timsh;
+static int timshtab[4] = {10, 4, 6, 8}, timsh;
ulong timclock;
Var evvars[] = {VAR(timsh), VAR(timclock), {nil, 0, 0}};
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