From: Tobias Girstmair <tobi@isticktoit.net>
Date: Mon, 26 Apr 2021 14:09:59 +0000 (+0200)
Subject: update cycle count
X-Git-Url: https://git.gir.st/Chiptunes-pms150c.git/commitdiff_plain/936a9ec2db80a80c7858a8794d552e8d8db1b360

update cycle count
---

diff --git a/bsv.asm b/bsv.asm
index e83e3a4..df121a9 100644
--- a/bsv.asm
+++ b/bsv.asm
@@ -50,7 +50,7 @@ ihrcr = 0x0B
 ; Bitshift Variations calls for an 8kHz sample rate; with an interrupt every
 ; 512 cycles (the next power of two above the 495 cycles the program needs for
 ; execution), this gives us a clock speed of 512 * 8khz = 4.096MHz. The MCU
-; will be powered by a 3V lithium coin cell. (+10-15ish cycles ivr overhead)
+; will be powered by a 3V lithium coin cell.
 calib_freq = 4096000 ; Hz
 calib_vdd  = 3000 ; mV
 
@@ -65,6 +65,8 @@ sleep_clock = (( 7<<5 | 1<<4 | 0<<3 | 1<<2 | 0<<1 | 0<<0 ))
 ; mod3:    28
 ; g:       81
 ; sample: 115 + 4*g + 2*mod3 = 495
+; isr overhead: 12
+; TOTAL: sample + overhead = 507
 
 ; portA.4: audio out
 ; portA.6: debug pin