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AX = 5F02h BH = what to set 02h dot clock BL = new clock speed (see #00180) 03h memory clock BL = new clock speed (see #00180) 04h set power-down register BL = new value for power-down register (bits 3-0 only) 06h (404 clock chip) set control register BL = new vlaue for control register (bits 5-0 only) 06h (404A/B/B-ES clock chips) set control register PWRDN1 BL = new value for control register 07h (404A/B/B-ES clock chips) set control register PWRDN1 BL = new value for control register FFh default dot and memory clocks
Return:
AL = 5Fh if function supported AH = status 00h unsuccessful 01h successful
See Also: AX=5F01h - AX=5F02h"64300" - AX=5FA0h - #00184
(Table 00180) Values for C&T '65530' BIOS clock speed: 00h 12 MHz 01h 14 MHz 02h 16 MHz 03h 18 MHz 04h 20 MHz 05h 25 MHz 06h 28 MHz 07h 32 MHz 08h 36 MHz 09h 40 MHz 0Ah 45 MHz 0Bh 50 MHz 0Ch 56 MHz 0Dh 60 MHz 0Eh 65 MHz 0Fh 66 MHz 15h 34 MHz
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