Model T Y2K - Revision history

Hackerb9: Add concatenated ROM file plus M14 ROM

2026-02-15T08:34:56Z

Add concatenated ROM file plus M14 ROM

← Older revision		Revision as of 08:34, 15 February 2026
Line 26:		Line 26:
	If you have a late model without LH535618, then you can use a plain 27C256, or [[FlexROM_102]] (optionally with [[Building a REX\|REX Classic]]), or [[28C256_to_27C256]].		If you have a late model without LH535618, then you can use a plain 27C256, or [[FlexROM_102]] (optionally with [[Building a REX\|REX Classic]]), or [[28C256_to_27C256]].

	==~~TANDY~~ Model 102==		==Tandy Model 102==
	US<br>		US<br>
	:0x5A53 0x31 -> 0x32		:0x5A53 0x31 -> 0x32
Line 43:		Line 43:
	You can use a plain 27C256, or [[FlexROM_102]] (optionally with [[Building_a_REX\|REX Classic]]), or [[28C256_to_27C256]] to install the patched rom.		You can use a plain 27C256, or [[FlexROM_102]] (optionally with [[Building_a_REX\|REX Classic]]), or [[28C256_to_27C256]] to install the patched rom.

	==~~TANDY~~ Model 200==		==Tandy Model 200==
	~~Model~~ 200 system ~~rom~~ spans 2 chips, ~~32k at~~ M15, and ~~8k at M13~~. Only M15 needs to be modified.		The Tandy 200 system ROM spans 3 chips, M15, M13, and M14. Only M15 needs to be modified.

	:0x6DF1 0x31 -> 0x32		:0x6DF1 0x31 -> 0x32
	:0x6DF3 0x39 -> 0x30		:0x6DF3 0x39 -> 0x30

	[[file:~~TANDY_Model_200~~.~~M15~~.orig.bin]]<br>		{\| class="wikitable sortable"
	[[file:~~TANDY_Model_200~~.M15.y2k.bin]]		\|+ Tandy 200 ROMs
			\|-
			! Description !! Original !! Y2K Patched
			\|-
			\|'''M15''': First system ROM chip (32K)
			\|\| [[File:Tandy_200.M15.orig.bin]] \|\| [[File:Tandy_200.M15.y2k.bin]]
			\|-
			\|'''M13''': Second system ROM chip (8K)
			\|\| [[file:Tandy_200.M13.orig.bin]]
			\|rowspan="2"\| not modified, included here just for completeness
			\|-
			\|'''M14''': Third system ROM chip<br/>Multiplan (32K, bank selected)
			\|[[file:Tandy_200.M14.orig.bin]]
			\|-
			\|All three ROMs (M15+M13+M14) in one file, for emulators
			\|\|[[file:Tandy_200.us.orig.bin]] \|\| [[file:Tandy_200.us.y2k.bin]]
			\|}

	~~[[file:TANDY_Model_200.M13.orig.bin]] (the 8k 2nd rom chip is not modified, included here just for completeness)~~		You can use a plain 27C256, or [[28C256_to_27C256]], or [[FlexROM_200]] (optionally with [[Building_a_REX\|REX Classic]]) to install the patched M15 ROM.

	You can use a plain 27C256, or [[28C256_to_27C256]], or [[FlexROM_200]] (optionally with [[Building_a_REX\|REX Classic]]) to install the patched ~~rom~~.

	==Olivetti M10==		==Olivetti M10==

Bkw: /* General */

2025-10-23T18:18:52Z

General

← Older revision		Revision as of 18:18, 23 October 2025
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	All the KC-85 clones have the same routine holding the century digits, though appearing at different addresses in different system roms.		All the KC-85 clones have the same routine holding the century digits, though appearing at different addresses in different system roms.

	A Y2K patching rule that applies the same to all machines is to just search for a certain string of bytes wherever it happens to appear, and edit.		A Y2K patching rule that applies the same to all machines is to just search for a certain string of 6 bytes wherever it happens to appear, and edit.

	Using the hex-editor of your choice:		Using the hex-editor of your choice:

Bkw at 01:09, 11 January 2023

2023-01-11T01:09:33Z

← Older revision		Revision as of 01:09, 11 January 2023
Line 54:		Line 54:
	[[file:TANDY_Model_200.M13.orig.bin]] (the 8k 2nd rom chip is not modified, included here just for completeness)		[[file:TANDY_Model_200.M13.orig.bin]] (the 8k 2nd rom chip is not modified, included here just for completeness)

	You can use a plain 27C256, or [[28C256_to_27C256]] to install the patched rom.		You can use a plain 27C256, or [[28C256_to_27C256]], or [[FlexROM_200]] (optionally with [[Building_a_REX\|REX Classic]]) to install the patched rom.

	==Olivetti M10==		==Olivetti M10==

Bkw: /* TANDY Model 200 */

2023-01-11T00:51:13Z

TANDY Model 200

← Older revision		Revision as of 00:51, 11 January 2023
Line 52:		Line 52:
	[[file:TANDY_Model_200.M15.y2k.bin]]		[[file:TANDY_Model_200.M15.y2k.bin]]

	[[file:TANDY_Model_200.M13.orig.bin]] (the 8k 2nd chip just for completeness)		[[file:TANDY_Model_200.M13.orig.bin]] (the 8k 2nd rom chip is not modified, included here just for completeness)

	You can use a plain 27C256, or [[28C256_to_27C256]] to install the patched rom.		You can use a plain 27C256, or [[28C256_to_27C256]] to install the patched rom.

Bkw: /* TANDY Model 102 */

2022-02-04T13:33:01Z

TANDY Model 102

← Older revision		Revision as of 13:33, 4 February 2022
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	UK<br>		UK<br>
			:0x5A53 0x31 -> 0x32
			:0x5A56 0x39 -> 0x30

	[[file:TANDY_Model_102.uk.orig.bin]]<br>		[[file:TANDY_Model_102.uk.orig.bin]]<br>
	[[file:TANDY_Model_102.uk.y2k.bin]]		[[file:TANDY_Model_102.uk.y2k.bin]]

Bkw: /* TANDY Model 102 */

2022-02-04T13:17:01Z

TANDY Model 102

← Older revision		Revision as of 13:17, 4 February 2022
Line 27:		Line 27:

	==TANDY Model 102==		==TANDY Model 102==
			US<br>
	:0x5A53 0x31 -> 0x32		:0x5A53 0x31 -> 0x32
	:0x5A56 0x39 -> 0x30		:0x5A56 0x39 -> 0x30

	[[file:TANDY_Model_102.orig.bin]]<br>		[[file:TANDY_Model_102.us.orig.bin]]<br>
	[[file:TANDY_Model_102.y2k.bin]]		[[file:TANDY_Model_102.us.y2k.bin]]

			UK<br>
			[[file:TANDY_Model_102.uk.orig.bin]]<br>
			[[file:TANDY_Model_102.uk.y2k.bin]]

	You can use a plain 27C256, or [[FlexROM_102]] (optionally with [[Building_a_REX\|REX Classic]]), or [[28C256_to_27C256]] to install the patched rom.		You can use a plain 27C256, or [[FlexROM_102]] (optionally with [[Building_a_REX\|REX Classic]]), or [[28C256_to_27C256]] to install the patched rom.

Bkw: /* Olivetti M10 */

2021-08-08T22:56:00Z

Olivetti M10

← Older revision		Revision as of 22:56, 8 August 2021
Line 56:		Line 56:

	Europe:		Europe:
	:~~0x5A5B~~ 0x31 -> 0x32		:0x5774 0x31 -> 0x32
	:~~0x5A5E~~ 0x39 -> 0x30		:0x5779 0x39 -> 0x30
	[[File:M10_System_ROM_EU.orig.bin]]<br>		[[File:M10_System_ROM_EU.orig.bin]]<br>
	[[File:M10_System_ROM_EU.y2k.bin]]		[[File:M10_System_ROM_EU.y2k.bin]]

Bkw: /* Olivetti M10 */

2021-08-08T22:53:48Z

Olivetti M10

← Older revision		Revision as of 22:53, 8 August 2021
Line 56:		Line 56:

	Europe:		Europe:
	~~<!--~~
	:0x5A5B 0x31 -> 0x32		:0x5A5B 0x31 -> 0x32
	:0x5A5E 0x39 -> 0x30		:0x5A5E 0x39 -> 0x30
	~~-->~~
	[[File:M10_System_ROM_EU.orig.bin]]<br>		[[File:M10_System_ROM_EU.orig.bin]]<br>
	[[File:M10_System_ROM_EU.y2k.bin]]		[[File:M10_System_ROM_EU.y2k.bin]]

Bkw: /* Olivetti M10 */

2021-08-08T22:53:22Z

Olivetti M10

← Older revision		Revision as of 22:53, 8 August 2021
Line 52:		Line 52:
	:0x5A5B 0x31 -> 0x32		:0x5A5B 0x31 -> 0x32
	:0x5A5E 0x39 -> 0x30		:0x5A5E 0x39 -> 0x30
	~~<!--~~ [[File:M10_System_ROM_NorthAmerica.orig.~~hex~~]] -->[[File:M10_System_ROM_NorthAmerica.~~orig~~.bin]]<br>		[[File:M10_System_ROM_NorthAmerica.orig.bin]]<br>
	<!-- [[File:~~M10_System_ROM_NorthAmerica~~.~~y2k~~.~~hex~~]] -->[[File:~~M10_System_ROM_NorthAmerica~~.y2k.bin]]		[[File:M10_System_ROM_NorthAmerica.y2k.bin]]

			Europe:
			<!--
			:0x5A5B 0x31 -> 0x32
			:0x5A5E 0x39 -> 0x30
			-->
			[[File:M10_System_ROM_EU.orig.bin]]<br>
			[[File:M10_System_ROM_EU.y2k.bin]]

	You can use a plain 27C256, or [[28C256_to_27C256]] to install the patched rom.		You can use a plain 27C256, or [[28C256_to_27C256]] to install the patched rom.

Bkw: /* TANDY Model 200 */

2021-07-19T04:55:31Z

TANDY Model 200

← Older revision		Revision as of 04:55, 19 July 2021
Line 40:		Line 40:
	:0x6DF1 0x31 -> 0x32		:0x6DF1 0x31 -> 0x32
	:0x6DF3 0x39 -> 0x30		:0x6DF3 0x39 -> 0x30

	~~[[file:TANDY_Model_102.M15.orig.bin]]<br>~~
	~~[[file:TANDY_Model_102.M15.y2k.bin]]~~

	~~[[file:TANDY_Model_102.M13.orig.bin]] (the 8k 2nd chip just for completeness)~~

	[[file:TANDY_Model_200.M15.orig.bin]]<br>		[[file:TANDY_Model_200.M15.orig.bin]]<br>