RTC - Revision history

Phi2x: /* RTC Registers */

2025-04-04T15:33:18Z

RTC Registers

← Older revision		Revision as of 15:33, 4 April 2025
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	\| 08H \|\| 0 \|\| 0 \|\| 0 \|\| 0 \|\| colspan="4" \| Month \|\| Month \|\| 01–0C		\| 08H \|\| 0 \|\| 0 \|\| 0 \|\| 0 \|\| colspan="4" \| Month \|\| Month \|\| 01–0C
	\|-		\|-
	\| 09H \|\| colspan="8" \| Year \|\| Year \|\| 00–63		\| 09H \|\| 0 \|\| colspan="7" \| Year \|\| Year \|\| 00–63
	\|}		\|}

Phi2x: /* RTC Registers */

2025-04-04T15:31:34Z

RTC Registers

← Older revision		Revision as of 15:31, 4 April 2025
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	{\| class="wikitable" style="text-align:center;"		{\| class="wikitable" style="text-align:center;"
	\|-		\|-
	! rowspan="2" \| Register !! colspan="8" \| Bit Position !! rowspan="2" \| Function !! rowspan="2" \| Range ~~(BCD)~~		! rowspan="2" \| Register !! colspan="8" \| Bit Position !! rowspan="2" \| Function !! rowspan="2" \| Range
	\|-		\|-
	! 7 \|\| 6 \|\| 5 \|\| 4 \|\| 3 \|\| 2 \|\| 1 \|\| 0		! 7 \|\| 6 \|\| 5 \|\| 4 \|\| 3 \|\| 2 \|\| 1 \|\| 0
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	{\| class="wikitable" style="text-align:center;"		{\| class="wikitable" style="text-align:center;"
	\|-		\|-
	! rowspan="2" \| Register !! colspan="8" \| Bit Position !! rowspan="2" \| Function !! rowspan="2" \| Range ~~(BCD)~~		! rowspan="2" \| Register !! colspan="8" \| Bit Position !! rowspan="2" \| Function !! rowspan="2" \| Range
	\|-		\|-
	! 7 \|\| 6 \|\| 5 \|\| 4 \|\| 3 \|\| 2 \|\| 1 \|\| 0		! 7 \|\| 6 \|\| 5 \|\| 4 \|\| 3 \|\| 2 \|\| 1 \|\| 0

Phi2x: /* RTC Registers */

2025-04-04T15:29:30Z

RTC Registers

← Older revision		Revision as of 15:29, 4 April 2025
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	{\| class="wikitable" style="text-align:center;"		{\| class="wikitable" style="text-align:center;"
	\|-		\|-
	! ~~ADDRESS~~ !! ~~BIT 7~~ !! ~~BIT 6~~ !! ~~BIT~~ 5 ~~!! BIT~~ 4 ~~!! BIT~~ 3 ~~!! BIT~~ 2 ~~!! BIT~~ 1 ~~!! BIT~~ 0 ~~!! FUNCTION !! RANGE~~		! rowspan="2" \| Register !! colspan="8" \| Bit Position !! rowspan="2" \| Function !! rowspan="2" \| Range (BCD)
			\|-
			! 7 \|\| 6 \|\| 5 \|\| 4 \|\| 3 \|\| 2 \|\| 1 \|\| 0
	\|-		\|-
	\| 00H \|\| 0 \|\| colspan="3" \| 10 Seconds \|\| colspan="4" \| Seconds \|\| Seconds \|\| 00–59		\| 00H \|\| 0 \|\| colspan="3" \| 10 Seconds \|\| colspan="4" \| Seconds \|\| Seconds \|\| 00–59
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	{\| class="wikitable" style="text-align:center;"		{\| class="wikitable" style="text-align:center;"
	\|-		\|-
	! ~~ADDRESS~~ !! ~~BIT 7~~ !! ~~BIT 6~~ !! ~~BIT~~ 5 ~~!! BIT~~ 4 ~~!! BIT~~ 3 ~~!! BIT~~ 2 ~~!! BIT~~ 1 ~~!! BIT~~ 0 ~~!! FUNCTION !! RANGE~~		! rowspan="2" \| Register !! colspan="8" \| Bit Position !! rowspan="2" \| Function !! rowspan="2" \| Range (BCD)
			\|-
			! 7 \|\| 6 \|\| 5 \|\| 4 \|\| 3 \|\| 2 \|\| 1 \|\| 0
	\|-		\|-
	\| 00H \|\| 0 \|\| 0 \|\| colspan="6" \| Seconds \|\| Seconds \|\| 00–3B		\| 00H \|\| 0 \|\| 0 \|\| colspan="6" \| Seconds \|\| Seconds \|\| 00–3B

Phi2x: /* RTC Registers */

2025-04-04T14:51:58Z

RTC Registers

← Older revision		Revision as of 14:51, 4 April 2025
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	\| 03H \|\| 0 \|\| colspan="3" \| 10 Minutes \|\| colspan="4" \| Minutes \|\| Minutes Alarm \|\| 00–59		\| 03H \|\| 0 \|\| colspan="3" \| 10 Minutes \|\| colspan="4" \| Minutes \|\| Minutes Alarm \|\| 00–59
	\|-		\|-
	\| 04H \|\| AM/PM \|\| 0 \|\| 0 \|\| 10 Hours \|\| colspan="4" \| Hours \|\| Hours \|\| 1–12 +AM/PM~~<br>00–23~~		\| rowspan="2" \| 04H \|\| AM/PM \|\| rowspan="2" \| 0 \|\| 0 \|\| 10 Hours \|\| colspan="4" \| Hours \|\| rowspan="2" \| Hours \|\| 1–12 +AM/PM
	\|-		\|-
	\| 05H \|\| AM/PM \|\| 0 \|\| 0 \|\| 10 Hours \|\| colspan="4" \| Hours \|\| Hours Alarm \|\| 1–12 +AM/PM~~<br>~~00–23		\| 0 \|\| colspan="2" \| 10 Hours \|\| colspan="4" \| Hours \|\| 00–23
			\|-
			\| rowspan="2" \| 05H \|\| AM/PM \|\| rowspan="2" \| 0 \|\| 0 \|\| 10 Hours \|\| colspan="4" \| Hours \|\| rowspan="2" \| Hours Alarm \|\| 1–12 +AM/PM
			\|-
			\| 0 \|\| colspan="2" \| 10 Hours \|\| colspan="4" \| Hours \|\| 00–23
	\|-		\|-
	\| 06H \|\| 0 \|\| 0 \|\| 0 \|\| 0 \|\| 0 \|\| colspan="3" \| Day \|\| Day \|\| 01–07		\| 06H \|\| 0 \|\| 0 \|\| 0 \|\| 0 \|\| 0 \|\| colspan="3" \| Day \|\| Day \|\| 01–07
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	\| 03H \|\| 0 \|\| 0 \|\| colspan="6" \| Minutes \|\| Minutes Alarm \|\| 00–3B		\| 03H \|\| 0 \|\| 0 \|\| colspan="6" \| Minutes \|\| Minutes Alarm \|\| 00–3B
	\|-		\|-
	\| rowspan="2" \| 04H \|\| AM/PM \|\| rowspan="2" \| 0 \|\| rowspan="2" \| 0 \|\| 0 \|\| colspan="4" \| Hours \|\| rowspan="2" \| Hours \|~~\| rowspan="2"~~ \| 01–0C +AM/PM~~<br>00–17~~		\| rowspan="2" \| 04H \|\| AM/PM \|\| rowspan="2" \| 0 \|\| rowspan="2" \| 0 \|\| 0 \|\| colspan="4" \| Hours \|\| rowspan="2" \| Hours \|\| 01–0C +AM/PM
	\|-		\|-
	\| 0 \|\| colspan="5" \| Hours		\| 0 \|\| colspan="5" \| Hours \|\| 00–17
	\|-		\|-
	\| rowspan="2" \| 05H \|\| AM/PM \|\| rowspan="2" \| 0 \|\| rowspan="2" \| 0 \|\| 0 \|\| colspan="4" \| Hours \|\| rowspan="2" \| Hours Alarm \|~~\| rowspan="2"~~ \| 01–0C +AM/PM~~<br>00–17~~		\| rowspan="2" \| 05H \|\| AM/PM \|\| rowspan="2" \| 0 \|\| rowspan="2" \| 0 \|\| 0 \|\| colspan="4" \| Hours \|\| rowspan="2" \| Hours Alarm \|\| 01–0C +AM/PM
	\|-		\|-
	\| 0 \|\| colspan="5" \| Hours		\| 0 \|\| colspan="5" \| Hours \|\| 00–17
	\|-		\|-
	\| 06H \|\| 0 \|\| 0 \|\| 0 \|\| 0 \|\| 0 \|\| colspan="3" \| Day \|\| Day \|\| 01–07		\| 06H \|\| 0 \|\| 0 \|\| 0 \|\| 0 \|\| 0 \|\| colspan="3" \| Day \|\| Day \|\| 01–07

Phi2x: /* RTC Registers */

2025-04-03T15:02:22Z

RTC Registers

@@ Line 34: / Line 34: @@
 === RTC Registers ===
-h  Second       (00..59) ;\
+Registers 00H-09H in BCD mode:
-h  Alarm second (00..59) ; these ten registers can be BCD or Binary
-h  Minute       (00..59) ; (see Control B, Bit2=DM)
+{| class="wikitable" style="text-align:center;"
-h  Alarm minute (00..59) ;
+|-
-h  Hour         (00..23) ;  ;\in 24hour mode:
+! ADDRESS !! BIT 7 !! BIT 6 !! BIT 5 !! BIT 4 !! BIT 3 !! BIT 2 !! BIT 1 !! BIT 0 !! FUNCTION !! RANGE
-h  Alarm hour   (00..23) ;  ;/bit7=PM
+|-
-h  Day of week  (01..07) ;
+| 00H || 0 || colspan="3" | 10 Seconds || colspan="4" | Seconds || Seconds || 00–59
-h  Day          (01..31) ;
+|-
-h  Month        (01..12) ;
+| 01H || 0 || colspan="3" | 10 Seconds || colspan="4" | Seconds || Seconds Alarm || 00–59
-h  Year         (00..99) ;/
+|-
 Ah  Control A
    UIP Update in Progress (0=Stable in next 244us, 1=Time changes) (R)
@@ Line 66: / Line 115: @@
    VRT  Valid RAM and Time (1=Okay, 0=Battery Low)              (R)
 -0 0    Reserved (zero)
 Eh..3Fh battery backed RAM (HD146818, DS1287A, DS12887A and other chips)
 h..7Fh battery backed RAM (only on DS12887A and newer chip variants)
 == Other chips ==

Phi2x: /* PC compatible RTC chip */

2025-04-03T10:45:15Z

PC compatible RTC chip

← Older revision		Revision as of 10:45, 3 April 2025
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	Usage in [[Aleste 520EX - I/O Ports]]:		Usage in [[Aleste 520EX - I/O Ports]]:
	Uses a russian KR512WI1 chip (which is, according to the Aleste's		Uses a russian KR512WI1 chip (which is, according to the Aleste's Manual) compatible to western MC146818 chips.
	Manual) compatible to western MC146818 chips.
	Connects to a 32.768kHz crystal.		Connects to a 32.768kHz crystal.
	Connects to the PPI:		Connects to the PPI:
Line 31:		Line 30:
	PPI Port C.Bit1 = Index Access (0=No, 1=Access)		PPI Port C.Bit1 = Index Access (0=No, 1=Access)
	PPI Port C.Bit2 = Data Access (0=No, 1=Access)		PPI Port C.Bit2 = Data Access (0=No, 1=Access)
	In the Aleste's Ext Port, the RTC must be enabled, and PSG and		In the Aleste's Ext Port, the RTC must be enabled, and PSG and 8253 must be disabled.
	8253 must be disabled.

	=== RTC Registers ===		=== RTC Registers ===

Phi2x: /* PC compatible RTC chip */

2025-04-03T10:43:56Z

PC compatible RTC chip

← Older revision		Revision as of 10:43, 3 April 2025
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	FBE2h Dk'tronics Real Time Clock - Z80 PIO Port A Control		FBE2h Dk'tronics Real Time Clock - Z80 PIO Port A Control
	FBE3h Dk'tronics Real Time Clock - Z80 PIO Port B Control		FBE3h Dk'tronics Real Time Clock - Z80 PIO Port B Control
	FBE8h Dk'tronics Real Time Clock - Control port for RTC chip (4bit latch) (details unknown)		FBE8h Dk'tronics Real Time Clock - Control port for RTC chip (4bit latch) '''(details unknown)'''
	Port B is connected directly to a standard 9-way connector on the left of the interface.		Port B is connected directly to a standard 9-way connector on the left of the interface.

Phi2x: /* Usage in CPCs */

2025-04-03T10:22:08Z

Usage in CPCs

← Older revision		Revision as of 10:22, 3 April 2025
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	Usage in [[Dk'tronics Real Time Clock]]:		Usage in [[Dk'tronics Real Time Clock]]:
	Uses a HD146818 chip.		Uses a Z80 PIO chip to control the HD146818 RTC chip via port A. Do not use Port A as this will affect the RTC operation.
	FBE0h Dk'tronics Real Time Clock - Z80 PIO Port A Data (HD146818P RTC Data bus)		FBE0h Dk'tronics Real Time Clock - Z80 PIO Port A Data (HD146818P RTC Data bus)
	FBE1h Dk'tronics Real Time Clock - Z80 PIO Port B Data, used for external control (General Purpose 8bit I/O Port)		FBE1h Dk'tronics Real Time Clock - Z80 PIO Port B Data, used for external control (General Purpose 8bit I/O Port)
Line 18:		Line 18:
	FBE3h Dk'tronics Real Time Clock - Z80 PIO Port B Control		FBE3h Dk'tronics Real Time Clock - Z80 PIO Port B Control
	FBE8h Dk'tronics Real Time Clock - Control port for RTC chip (4bit latch) (details unknown)		FBE8h Dk'tronics Real Time Clock - Control port for RTC chip (4bit latch) (details unknown)
	~~Do not use~~ Port ~~A as this will affect~~ the ~~RTC operation~~.		Port B is connected directly to a standard 9-way connector on the left of the interface.

	----		----

Phi2x: /* PC compatible RTC chip */

2025-04-03T10:17:52Z

PC compatible RTC chip

← Older revision		Revision as of 10:17, 3 April 2025
Line 15:		Line 15:
	FBE0h Dk'tronics Real Time Clock - Z80 PIO Port A Data (HD146818P RTC Data bus)		FBE0h Dk'tronics Real Time Clock - Z80 PIO Port A Data (HD146818P RTC Data bus)
	FBE1h Dk'tronics Real Time Clock - Z80 PIO Port B Data, used for external control (General Purpose 8bit I/O Port)		FBE1h Dk'tronics Real Time Clock - Z80 PIO Port B Data, used for external control (General Purpose 8bit I/O Port)
	FBE2h Dk'tronics Real Time Clock - Z80 PIO Port A Control ~~(do not use as this will affect the RTC operation)~~		FBE2h Dk'tronics Real Time Clock - Z80 PIO Port A Control
	FBE3h Dk'tronics Real Time Clock - Z80 PIO Port B Control		FBE3h Dk'tronics Real Time Clock - Z80 PIO Port B Control
	FBE8h Dk'tronics Real Time Clock - Control port for RTC chip (4bit latch) (details unknown)		FBE8h Dk'tronics Real Time Clock - Control port for RTC chip (4bit latch) (details unknown)
			Do not use Port A as this will affect the RTC operation.

	----		----

Phi2x: /* PC compatible RTC chip */

2025-04-03T10:13:29Z

PC compatible RTC chip

← Older revision		Revision as of 10:13, 3 April 2025
Line 13:		Line 13:
	Usage in [[Dk'tronics Real Time Clock]]:		Usage in [[Dk'tronics Real Time Clock]]:
	Uses a HD146818 chip.		Uses a HD146818 chip.
	~~Details on~~ I/O ~~addresses are~~ unknown.		FBE0h Dk'tronics Real Time Clock - Z80 PIO Port A Data (HD146818P RTC Data bus)
			FBE1h Dk'tronics Real Time Clock - Z80 PIO Port B Data, used for external control (General Purpose 8bit I/O Port)
			FBE2h Dk'tronics Real Time Clock - Z80 PIO Port A Control (do not use as this will affect the RTC operation)
			FBE3h Dk'tronics Real Time Clock - Z80 PIO Port B Control
			FBE8h Dk'tronics Real Time Clock - Control port for RTC chip (4bit latch) (details unknown)

	----		----