X-MEM - Revision history

TotO at 04:47, 29 August 2020

2020-08-29T04:47:02Z

← Older revision		Revision as of 04:47, 29 August 2020
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	X-MEM is a 512KB RAM and 512KB ROM Expansion made by [[TotO]] from [[ACME]]. It can be paired with a [[Y-MEM]] to expand the CPC to 1MB RAM.		X-MEM is a 512KB RAM and 512KB ROM Expansion made by [[TotO]] from [[ACME]]. Realeased on March 2014.
			It can be paired with a [[Y-MEM]] to expand the CPC to 1MB RAM and 1MB ROM.

	== Technical ==		== Technical ==

TotO at 09:51, 14 November 2019

2019-11-14T09:51:59Z

← Older revision		Revision as of 09:51, 14 November 2019
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	[[Category:FutureOS]]		[[Category:FutureOS]]
	[[Category:Peripherals]]		[[Category:Peripherals]]

			Website: [http://centpourcent.net centpourcent.net]

Arnoldemu at 09:29, 11 March 2018

2018-03-11T09:29:12Z

← Older revision		Revision as of 09:29, 11 March 2018
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	X-MEM is a 512KB RAM and 512KB ROM Expansion. It can be paired with a [[Y-MEM]] to expand the CPC to 1MB RAM.		X-MEM is a 512KB RAM and 512KB ROM Expansion made by [[TotO]] from [[ACME]]. It can be paired with a [[Y-MEM]] to expand the CPC to 1MB RAM.

	== Technical ==		== Technical ==

Arnoldemu at 09:26, 11 March 2018

2018-03-11T09:26:44Z

← Older revision		Revision as of 09:26, 11 March 2018
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	~~CPC~~ X-MEM		X-MEM is a 512KB RAM and 512KB ROM Expansion. It can be paired with a [[Y-MEM]] to expand the CPC to 1MB RAM.

	== Technical ==		== Technical ==
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	A4: Try to boot with the ESC key pressed, then apply the X-MEM rescue pass.		A4: Try to boot with the ESC key pressed, then apply the X-MEM rescue pass.

			[[Category:Memory expansions]][[Category:Expansion ROM]]
	[[Category:FutureOS]]		[[Category:FutureOS]]
	[[Category:Peripherals]]		[[Category:Peripherals]]

TFM: /* Technical */

2018-01-15T13:38:38Z

Technical

← Older revision		Revision as of 13:38, 15 January 2018
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	* If 'ROM read' is active then CPC will see 16 KB pages from the X-MEM flash at ROM slots 0-6 and 8-31. If boot from CPC, then ROM 0 will be from CPC.		* If 'ROM read' is active then CPC will see 16 KB pages from the X-MEM flash at ROM slots 0-6 and 8-31. If boot from CPC, then ROM 0 will be from CPC.

	* If 'free' is active, the CPC will also see 16 KB pages from the X-MEM flash at &40-&4f. All are visible regardless of booting from CPC or X-MEM.		* If 'free' is active, the CPC will also see 16 KB pages from the X-MEM flash at &40-&4f. All are visible regardless of booting from CPC or X-MEM. ROM select &47 contains the alternate lower ROM.

	* When boot from CPC is active, OS and BASIC are from CPC and not from X-MEM but they can still be accessed at &40-&4f if free is set.		* When boot from CPC is active, OS and BASIC are from CPC and not from X-MEM but they can still be accessed at &40-&4f if free is set.

TFM: /* Technical */

2018-01-15T13:36:41Z

Technical

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	ROMs are selected using the normal ROM selection I/O port (DFxx).		ROMs are selected using the normal ROM selection I/O port (DFxx).

	* If '~~rom~~ read' is active then CPC will see ~~16KB~~ pages from the X-MEM flash at ~~rom~~ slots 0-15. If boot from CPC, then ROM 0 will be from CPC.		* If 'ROM read' is active then CPC will see 16 KB pages from the X-MEM flash at ROM slots 0-6 and 8-31. If boot from CPC, then ROM 0 will be from CPC.

	* If 'free' is active, the CPC will also see ~~16KB~~ pages from the X-MEM flash at &40-&4f. All are visible regardless of booting from CPC or X-MEM.		* If 'free' is active, the CPC will also see 16 KB pages from the X-MEM flash at &40-&4f. All are visible regardless of booting from CPC or X-MEM.

	* When boot from CPC is active, OS and BASIC are from CPC and not from X-MEM but they can still be accessed at &40-&4f if free is set.		* When boot from CPC is active, OS and BASIC are from CPC and not from X-MEM but they can still be accessed at &40-&4f if free is set.

TFM: /* 3. Burning ROMs */

2018-01-15T13:35:16Z

3. Burning ROMs

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	==== 3. Burning ROMs ====		==== 3. Burning ROMs ====
	You can program from BASIC the X-MEM: CALL &B8DD,<source>,<rom_id>		There are different ways to flash a ROM:
			* Using Firmware 3.15: You can program the ROM from BASIC into the X-MEM: CALL &B8DD,<source>,<rom_id>
	i.e. “CALL &B8DD,&4000,15” set the ROM 15 with 16K loaded at &4000.		i.e. “CALL &B8DD,&4000,15” set the ROM 15 with 16K loaded at &4000.
			* Using FutureOS: Use the convenient [[ROManager]] to manage all your ROMs.

	=== FutureOS Lower ROM ===		=== FutureOS Lower ROM ===

Arnoldemu: /* X-MEM Install Pass */

2018-01-14T16:59:08Z

X-MEM Install Pass

← Older revision		Revision as of 16:59, 14 January 2018
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	This program allows to install the X-MEM after the Init pass. Also, it can up- date the Firmware and BASIC, targeting your CPC and keyboard layout. RUN”INSTALL”		This program allows to install the X-MEM after the Init pass. Also, it can up- date the Firmware and BASIC, targeting your CPC and keyboard layout. RUN”INSTALL”
	The process takes few seconds for reprogramming the Lower ROM and ROM		The process takes few seconds for reprogramming the Lower ROM and ROM
	0. Then you will be able to choose the CPC target model for programming the X-MEM. ~~Notethat~~ ROM 1 ~~willbeusedinthefuturetoextendthe~~ Firmware 3.14. Currently, a 448K RAM ~~Drive“C”is~~ installed. Use \|C from BASIC or C: from CP/M.		0. Then you will be able to choose the CPC target model for programming the X-MEM. Note that ROM 1 will be used in the future to extend the Firmware 3.14. Currently, a 448K RAM Drive “C” is installed. Use \|C from BASIC or C: from CP/M.

	=== X-MEM Rescue Pass ===		=== X-MEM Rescue Pass ===

Arnoldemu: /* Technical */

2018-01-14T15:45:08Z

Technical

← Older revision		Revision as of 15:45, 14 January 2018
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	ROMs are selected using the normal ROM selection I/O port (DFxx).		ROMs are selected using the normal ROM selection I/O port (DFxx).

	~~The~~ CPC ~~sees~~ 16KB pages from the X-MEM flash at rom slots 0-15 ~~and &40-&4f~~.		* If 'rom read' is active then CPC will see 16KB pages from the X-MEM flash at rom slots 0-15. If boot from CPC, then ROM 0 will be from CPC.

	~~Rom slots~~ &40-&4f are ~~always~~ visible regardless of ~~the ROM lock~~ or ~~ROM boot switches whereas 0~~-~~15 depend on these switches. If you wish to program the flash use the rom slot &40-&4f range~~.		* If 'free' is active, the CPC will also see 16KB pages from the X-MEM flash at &40-&4f. All are visible regardless of booting from CPC or X-MEM.

	When "boot from CPC" is ~~activated~~, ~~rom 0~~ and OS are not ~~paged in by the~~ X-MEM but can still be accessed at &40 ~~etc~~.		* When boot from CPC is active, OS and BASIC are from CPC and not from X-MEM but they can still be accessed at &40-&4f if free is set.

	The flash is mapped contiguously to roms 0-15 so that when programming the flash you need to translate the flash address from the datasheet to an appropriate rom slot and address in the range &c000-&ffff.		* If you wish to program the flash make sure 'free' is set and use the rom slots in the &40-&4f range.

			* The flash is mapped contiguously to roms &40-&4f so that when programming the flash you need to translate the flash address from the datasheet to an appropriate rom slot and address in the range &c000-&ffff.

	e.g. for flash address &05555 use DF41 and address &D555. For &2aaa this is DF40 and address &EAAA.		e.g. for flash address &05555 use DF41 and address &D555. For &2aaa this is DF40 and address &EAAA.

	If 'free' is set then writes to &c000-&ffff go to both the flash and to ram. When the upper rom is paged in, writes to &c000-&ffff go to the ram as normal.		* If 'free' is set then writes to &c000-&ffff go to both to the flash and to ram. When the upper rom is paged in, writes to &c000-&ffff go to the ram as normal.

	Writing to the flash doesn't require the upper rom to be paged in.		* Writing to the flash doesn't require the upper rom to be paged in.

	If 'rom read' is not set, ~~x-mem doesn~~'t ~~activate the rom~~.		* If 'rom read' is not set, roms are not visible at all and flash can't be accessed.

	== X-MEM Floppy Disc Utilities ==		== X-MEM Floppy Disc Utilities ==

Arnoldemu: /* Technical */

2018-01-14T15:37:59Z

Technical

← Older revision		Revision as of 15:37, 14 January 2018
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	Writing to the flash doesn't require the upper rom to be paged in.		Writing to the flash doesn't require the upper rom to be paged in.

	If '~~lock~~' is set, x-mem doesn't activate the rom.		If 'rom read' is not set, x-mem doesn't activate the rom.

	== X-MEM Floppy Disc Utilities ==		== X-MEM Floppy Disc Utilities ==