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-rw-r--r--src/emu/drivers/xtal.h8
1 files changed, 4 insertions, 4 deletions
diff --git a/src/emu/drivers/xtal.h b/src/emu/drivers/xtal.h
index 2104d1a2be0..21d57348acc 100644
--- a/src/emu/drivers/xtal.h
+++ b/src/emu/drivers/xtal.h
@@ -94,8 +94,8 @@ enum
XTAL_8_7MHz = 8700000, /* Tandberg TDV 2324 */
XTAL_8_867236MHz = 8867236, /* RCA CDP1869 PAL color clock (~2x PAL subcarrier) */
XTAL_8_867238MHz = 8867238, /* ETI-660 (~2x PAL subcarrier) */
- XTAL_9_216MHz = 9216000, /* Conitec PROF-180X */
XTAL_8_945MHz = 8945000, /* Hit Me */
+ XTAL_9_216MHz = 9216000, /* Conitec PROF-180X */
XTAL_9_828MHz = 9828000, /* Universal PCBs */
XTAL_9_8304MHz = 9830400, /* Epson PX-8 */
XTAL_9_987MHz = 9987000, /* Crazy Balloon */
@@ -189,7 +189,7 @@ enum
XTAL_30_4761MHz = 30476100, /* Taito JC */
XTAL_30_8MHz = 30800000, /* 15IE-00-013 */
XTAL_32MHz = 32000000,
- XTAL_32_22MHz = 32220000, /* Typically used on 90's Data East PCBs */
+ XTAL_32_22MHz = 32220000, /* Typically used on 90's Data East PCBs (close to 9x NTSC subcarrier which is 32.215905Mhz*/
XTAL_32_5304MHz = 32530400, /* Seta 2 */
XTAL_33MHz = 33000000, /* Sega Model 3 video board */
XTAL_33_333MHz = 33333000, /* Sega Model 3 CPU board, Vegas */
@@ -209,7 +209,7 @@ enum
XTAL_48_66MHz = 48660000, /* Zaxxon */
XTAL_49_152MHz = 49152000, /* Used on some Namco PCBs, Baraduke h/w, System 21, Super System 22 */
XTAL_50MHz = 50000000, /* Williams/Midway T/W/V-unit system */
- XTAL_50_113MHz = 50113000, /* Namco NA-1 */
+ XTAL_50_113MHz = 50113000, /* Namco NA-1 (14x NTSC subcarrier)*/
XTAL_52MHz = 52000000, /* Cojag */
XTAL_52_832MHz = 52832000, /* Wang PC TIG video controller */
XTAL_53_693175MHz = 53693175, /* PSX-based h/w, Sony ZN1-2-based (15x NTSC subcarrier) */
@@ -233,7 +233,7 @@ enum
XTAL_400kHz = 400000, /* OKI MSM5205 on Great Swordman h/w */
XTAL_455kHz = 455000, /* OKI MSM5205 on Gladiator h/w */
XTAL_512kHz = 512000, /* Toshiba TC8830F */
- XTAL_640kHz = 640000, /* NEC UPD7759, Texas Instruments Speech Chips */
+ XTAL_640kHz = 640000, /* NEC UPD7759, Texas Instruments Speech Chips @ 8khz */
XTAL_1_056MHz = 1056000 /* OKI M6295 on Trio The Punch h/w */
};