Next Memory Bank Select - Revision history

Ped7g at 11:45, 4 May 2020

2020-05-04T11:45:42Z

← Older revision		Revision as of 12:45, 4 May 2020
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	{{Port		{{Port
	\|Number=$DFFD		\|Number=$DFFD
			\|NumberDec=57341
			\|PortMask=%1101 1111 1111 1101
	\|ShortDesc=Provides additional bank select bits for extended memory.		\|ShortDesc=Provides additional bank select bits for extended memory.
	\|Readable=No		\|Readable=No
	\|Writable=Yes		\|Writable=Yes
	\|Subsystem=Memory map		\|Subsystem=Memory map
	~~\|PortMask=%1101 1111 1111 1101~~
	}}		}}
	: bit 7 = 1 to set pentagon 512K mode (hard reset = 0) &dagger;		: bit 7 = 1 to set pentagon 512K mode (hard reset = 0) &dagger;

Ped7g: core 3.1.5 changes/refresh

2020-04-27T07:18:35Z

core 3.1.5 changes/refresh

← Older revision		Revision as of 08:18, 27 April 2020
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	}}		}}
	: bit 7 = 1 to set pentagon 512K mode (hard reset = 0) &dagger;		: bit 7 = 1 to set pentagon 512K mode (hard reset = 0) &dagger;
	: bits 3:0 = most significant bits of the 16K RAM bank selected in {{PortNo\|$7FFD}}		: bits 3:0 = most significant bits of the 16K RAM bank selected in {{PortNo\|$7FFD}} (soft reset = 0)

	Port 0xDFFD bits 3:0 are combined as the highest bits with the bank selected in port 0x7FFD to form a 7-bit bank number.		Port 0xDFFD bits 3:0 are combined as the highest bits with the bank selected in port 0x7FFD to form a 7-bit bank number.

			Bit 7 can only be modified when pentagon timing is not active.

	&dagger; Pentagon 512K mode is applied only when the machine is set to pentagon timing ({{NextRegNo\|$03}}). In this mode the selected 16K bank comes from port 0x7ffd {bits 7:6, bits 2:0}		&dagger; Pentagon 512K mode is applied only when the machine is set to pentagon timing ({{NextRegNo\|$03}}). In this mode the selected 16K bank comes from port 0x7ffd {bits 7:6, bits 2:0}

Ped7g: core 3.1.4 changes/refresh

2020-04-16T00:51:49Z

core 3.1.4 changes/refresh

← Older revision		Revision as of 01:51, 16 April 2020
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	\|PortMask=%1101 1111 1111 1101		\|PortMask=%1101 1111 1111 1101
	}}		}}
	bits 3:0 = most significant bits of the 16K RAM bank selected in {{PortNo\|$7FFD}}		: bit 7 = 1 to set pentagon 512K mode (hard reset = 0) &dagger;
			: bits 3:0 = most significant bits of the 16K RAM bank selected in {{PortNo\|$7FFD}}

	Port 0xDFFD bits 3:0 are combined as the highest bits with the bank selected in port 0x7FFD to form a 7-bit bank number.		Port 0xDFFD bits 3:0 are combined as the highest bits with the bank selected in port 0x7FFD to form a 7-bit bank number.

			&dagger; Pentagon 512K mode is applied only when the machine is set to pentagon timing ({{NextRegNo\|$03}}). In this mode the selected 16K bank comes from port 0x7ffd {bits 7:6, bits 2:0}

Ped7g: adding info

2019-12-31T10:16:35Z

adding info

← Older revision		Revision as of 11:16, 31 December 2019
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	\|Number=$DFFD		\|Number=$DFFD
	\|ShortDesc=Provides additional bank select bits for extended memory.		\|ShortDesc=Provides additional bank select bits for extended memory.
	\|Readable=~~Yes~~		\|Readable=No
	\|Writable=No		\|Writable=Yes
	\|Subsystem=Memory map		\|Subsystem=Memory map
	\|PortMask=%1101 1111 1111 1101		\|PortMask=%1101 1111 1111 1101
	}}		}}
			bits 3:0 = most significant bits of the 16K RAM bank selected in {{PortNo\|$7FFD}}

			Port 0xDFFD bits 3:0 are combined as the highest bits with the bank selected in port 0x7FFD to form a 7-bit bank number.

Xalior at 23:03, 19 April 2019

2019-04-19T23:03:52Z

← Older revision		Revision as of 00:03, 20 April 2019
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	\|Number=$DFFD		\|Number=$DFFD
	\|ShortDesc=Provides additional bank select bits for extended memory.		\|ShortDesc=Provides additional bank select bits for extended memory.
	~~\|PortMask=%1101 1111 1111 1101~~
	\|Readable=Yes		\|Readable=Yes
	\|Writable=No		\|Writable=No
	\|Subsystem=Memory map		\|Subsystem=Memory map
			\|PortMask=%1101 1111 1111 1101
	}}		}}

Specnext: 3 revisions imported

2019-04-14T10:00:19Z

3 revisions imported

← Older revision	Revision as of 11:00, 14 April 2019
(No difference)

wiki>Hyphz at 23:02, 29 August 2017

2017-08-29T23:02:27Z

← Older revision		Revision as of 00:02, 30 August 2017
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	\|Number=$DFFD		\|Number=$DFFD
	\|ShortDesc=Provides additional bank select bits for extended memory.		\|ShortDesc=Provides additional bank select bits for extended memory.
	\|Readable=No		\|PortMask=%1101 1111 1111 1101
			\|Readable=Yes
	\|Writable=No		\|Writable=No
	\|Subsystem=Memory map		\|Subsystem=Memory map
	}}		}}

wiki>Hyphz at 00:01, 29 August 2017

2017-08-29T00:01:14Z

← Older revision		Revision as of 01:01, 29 August 2017
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	\|Readable=No		\|Readable=No
	\|Writable=No		\|Writable=No
	\|Subsystem=Memory ~~Map~~		\|Subsystem=Memory map
	}}		}}

wiki>Hyphz: Created page with "{{Port |Number=$DFFD |ShortDesc=Provides additional bank select bits for extended memory. |Readable=No |Writable=No |Subsystem=Memory Map }}"

2017-08-29T00:00:37Z

Created page with "{{Port |Number=$DFFD |ShortDesc=Provides additional bank select bits for extended memory. |Readable=No |Writable=No |Subsystem=Memory Map }}"

New page

{{Port
|Number=$DFFD
|ShortDesc=Provides additional bank select bits for extended memory.
|Readable=No
|Writable=No
|Subsystem=Memory Map
}}