Software EPROM Information

GEM & LEM EPROM Information Table

EPROMs, Operating System (Firmware), were used in the earlier GEM equipment, (plus later models like Digital Real Pianos) and also some of the LEM range.

Whilst this is not a definitive list (as it may expand), a number of firmware revisions and updates maybe shown below. Please review the latest, or one matching your version. If updating to a later version, you MUST update ALL the set of EPROMs.

EPROM BIN files, with CHK(16), are available in the Members download area. We welcome any new, or updated BIN code and models.

In alphabetical order. List being updated. Please use table search, or column sort, as needed.

Code	Rev	Ver	CHK(16)	CHK	Model	Description	Release	Type	Set	IC
550068	A	1	00DEEA81h	EA81	WS2			27C1001	1	IC6
550069	A	1	009D4CA9h	4CA9	WS2			27C1001	1	IC13
550070	C	1	00697BB7h	7BB7	WS2			27C512	1	IC23
550071	A		000E11D2h	11D2	WS2M	Sys Disk Ver 2.3		27C256
550076	A	1.1	011D4DE5h	4DE5	WS2/M			27C1001	1	IC6
550076		1.1			WS2 II			27C1001	1	IC4
550077	A	1.1	00C1F01Fh	F01F	WS2/M			27C1001	1	IC13
550077	A	1.1	00C1F01Fh	F01F	WS2 II			27C1001	1	IC10
550079	A	1.1		4C48	WS2 II			27C512	1	IC20
550079	B	1.1		E2C0	WS2 II			27C512	1	IC20
550079	C	1.1	00685422h	5422	WS2 II	Midi Lock		27C512	1	IC20
550079	D	?	006821DFh	21DF	WS2 II	Ref: b2. Upgrade MKII. Possibly a MIDI Lock Fix		27C512	1	IC20
550081	A	1.1		19A5	WSM			27C512	1	IC29
550081	A	?	00694CDCh	4CDC	WSM	Different Checksum to other A		27C512	1	IC29
550081	B	1.1		B990	WSM			27C512	1	IC29
550081	C	1.1	006919A5h	19A5	WSM	Midi Lock Update		27C512	1	IC29
550083	A	1.1		4ACB	WS2			27C512	1	IC23
550083	C	1.1	00685340h	5340	WS2	MIDI Lock		27C512	1	IC23
550107	A			92CA	S2/3			27C040	2	IC32
550107	B			1BB3	S2/3			27C040	2	IC32
550107	C		02004A9Bh	4A9B	S2/3	Green Update		27C040	2	IC32
550107	D	?	01FE30DAh	30DA	S2/3	Green Update. Updated?		27C040	2	IC32
550108	A			6F7A	S2/3			27C040	2	IC34
550108	B			44DC	S2/3			27C040	2	IC34
550108	C		0244F630h	F630	S2/3	Green Update		27C040	2	IC34
550108	D	?	0242ECEDh	ECED	S2/3	Green Update. Updated?		27C040	2	IC34
550109	A	1	04505B4Eh	5B4E	WS1	(Program)	1991-06-30 00:00:00	27C4001	1	IC21
550109		?	03CC6D2Eh	6D2E	WS1	Early Version? (Program)		27C4001	1	IC21
550296	A	0	02BCA461h	A461	WX2	Alpha Version - Pre Version Display (Program Odd)	0/0/1993	27C040	4	IC16
550296	B	1.02		6B6D	WX2	Beta Version (Program Odd)		27C040	4	IC16
550296	C	1.03		06D5	WX2	(Program Odd)		27C040	4	IC16
550296	D	1.04		3DB1	WX2	(Program Odd)		27C040	4	IC16
550296	E	1.05	02A5D9AEh	D9AE	WX2	(Program Odd)	1994-10-24 00:00:00	27C040	4	IC16
550297	A	0	01C231F7h	31F7	WX2	Alpha Version - Pre Version Display (Sound Odd)	0/0/1993	27C040	4	IC17
550297	B	1.02		F59E	WX2	Beta Version (Sound Odd)		27C040	4	IC17
550297	C	1.03	01C2789Fh	789F	WX2	(Sound Odd)	0/0/1993	27C040	4	IC17
550297	D	1.04	01C415C8h	15C8	WX2	(Sound Odd)	0/0/1994	27C040	4	IC17
550297	D	1.04	01C415C8h	15C8	WX2M	(Sound Odd)	0/0/1994	27C040	4	IC48
550297	E	1.05	01A9801Ch	801C	WX2	(Sound Odd)	1994-10-24 00:00:00	27C040	4	IC17
550298	A	0		78C9	WX2	Alpha Version - Pre Version Display (Program Even (78CA))		27C040	4	IC18
550298	A	0		8C91	WX2	Alpha Version (Program Even)		27C040	4	IC19
550298	B	1.02		5C1C	WX2	Beta Version (Program Even)		27C040	4	IC18
550298	C	1.03		D075	WX2	(Program Even)		27C040	4	IC18
550298	D	1.04		944C	WX2	(Program Even)		27C040	4	IC18
550298	E	1.05	020D929Ah	929A	WX2	(Program Even)	1994-10-24 00:00:00	27C040	4	IC18
550299	A	0		8C91	WX2	Alpha Version - Pre Release (Sound Even)		27C040	4	IC19
550299	B	1.02		F87C	WX2	Beta Version (Sound Even)		27C040	4	IC19
550299	C	1.03	017A8AA0h	8AA0	WX2	(Sound Even)		27C040	4	IC19
550299	D	1.04	017C87E3h	87E3	WX2	(Sound Even)		27C040	4	IC19
550299	D	1.04	017C87E3h	87E3	WX2M	(Sound Even)		27C040	4	IC50
550299	E	1.05	0161F3A4h	F3A4	WX2	(Sound Even)	1994-10-24 00:00:00	27C040	4	IC19
550299	E	1.05	0161F3A4h	F3A4	WX2M	(Sound Even)	1994-10-24 00:00:00	27C040	4	IC50
550305	A		030F05A4h	05A4	CD1			27C240
550305	R	?	02FBF19Fh	F19F	CD1			27C4096
550305		?	0325CE70h	CE70
550305				CC60	MIXER			27C040	1
550306	A	1.03		69EE	WX2	No Longer Valid Use 550360 (Video PAL Version)		27C4002	1	IC1
550306	C	1.03		6DE9	WX2	No Longer Valid Use 550360 (Video PAL Version)		27C4002	1	IC1
550306	C	?	049458A1h	58A1	WX2	Different Checksum to other C (Video PAL Version)		27C4002	1	IC1
550306	D	1.04	04334FEBh	4FEB	WX2	No Longer Valid Use 550360 (Video PAL Version)		27C4002	1	IC1
550306	D	1.04		E140	WX2	No Longer Valid Use 550360 (Video PAL Version)		27C4002	1	IC1
550306	E	1.05		70E1	WX2	No Longer Valid Use 550360 (Video PAL Version)	1994-11-01 00:00:00	27C4002	1	IC1
550306	E	?	03D7DA4Ah	DA4A	WX Series	No Longer Valid Use 550360 (Video PAL Version)		27C240	1	IC1
550317	A		02F33E1Dh	3E1D	STURBO	(Program Even)	0/0/1993	27C040	2	IC4
550317	B		02159264h	9264	STURBO	Bug Fix Version (Program Even)	1994-12-01 00:00:00	27C040	2	IC4
550317				4EB5	STURBO	Early Version (Program Even)		27C040	2	IC4
550318	A		02D76968h	6968	STURBO			27C040	2	IC5
550319	A	?	039D1579h	1579	STURBO	Different Checksum to other A (Program Odd)		27C040	2	IC6
550319	A			741C	STURBO	(Program Odd)		27C040	2	IC6
550319	B		02907043h	7043	STURBO	Bug Fix Version (Program Odd)	1994-12-01 00:00:00	27C040	2	IC6
550319				6B39	STURBO	Early Version (Program Odd)		27C040	2	IC6
550320	A		02C701D3h	01D3	STURBO	(CRC Also typed 81D3)	0/0/1993	27C040	2	IC7
550321	A			9EDB	CD3			27C240	1	IC6
550321	B	?	034B9EDBh	9EDB	CD3	Unsure what a CRC is		27C240	1	IC6
550321	B		0336CB4Dh	6CB4	CD3			27C240	1	IC6
550323	A	1.03			WX2	Video Program NTSC		27C4002	1	IC1
550323	E	1.05		2CAA	WX2	Video Program NTSC	1994-11-01 00:00:00	27C4002	1	IC1
550324	D	1.04	02A43E52h	3E52	WX2M	Different Checksum to other D (Program Odd)	0/0/1994	27C040	4	IC47
550324	D	1.04		F279	WX2M	(Program Odd)	1994-01-01 00:00:00	27C040	4	IC47
550324	E	1.05	02AA49FCh	49FC	WX2M	ipv.296 (Program Odd)	1994-12-01 00:00:00	27C040	4	IC47
550324	E	1.05		F5AB	WX2M	Old Release (Program Odd)	1994-11-01 00:00:00	27C040	4	IC47
550325	B?		02094973h				0/0/1994
550325	D	1.04		71C6	WX2M	(Program Even)	1901-01-01 00:00:00	27C040	4	IC49
550325	E	1.05	02082BD3h	2BD3	WX2M	Old Release (Program Even)	1994-11-01 00:00:00	27C040	4	IC49
550325	E	1.05	0210D631h	D631	WX2M	ipv.298 (Program Even)	1994-12-01 00:00:00	27C040	4	IC49
550334	A		034B411Ah	411A	CD3+	CD2 & CD3 Plus Upgrade	1995-01-01 00:00:00	27C240	1	IC6
550334	R		033775A8h	75A8	CD3+			27C240	1	IC6
550334		?	034B0B2Ah	0B2A	CD3+			27C240	1	IC6
550346	R		0331902Ah	902A	CD1 Oriental			27C4096
550349	B	2	0460882Bh	882B	SAPPIRE	USA Update (D600 II)		27C040	1
550355	E	1.05	02B355C2h	55C2	SX2/3	Release 1 (Program Odd)	1994-10-24 00:00:00	27C040	4	IC17
550356	E	1.05	021CF8EDh	F8ED	SX2/3	Release 1 (Program Even)	1994-10-24 00:00:00	27C040	4	IC18
550357	E	1.05	01B8C6FAh	C6FA	SX2/3	Release 1 (Sound Odd)	1994-10-24 00:00:00	27C040	4	IC17
550358	E	1.05	018CB689h	B689	SX2/3	Release 1 (Sound Even)	1994-10-24 00:00:00	27C040	4	IC19
550359	E	1.05		E78E	WX2	USA Version (Video NTSC Version)	1994-12-01 00:00:00	27C240	1	IC1
550360	A	1		69EE	WX2	(Video PAL Version)		27C240	1	IC1
550360	C	1.03		6DE9	WX2	(Video PAL Version)		27C240	1	IC1
550360	E	1.05	03D7DA4Ah	DA4A	WX2	(Video PAL Version)	1994-12-01 00:00:00	27C240	1	IC1
550501	A	1	02ACE0A8h	E0A8	WX2+	WX Plus Upgrade Release 1 (Program Odd) & SX	1995-04-01 00:00:00	27C040	4	IC16
550502	A	1	01DE88DBh	88DB	WX2+	WX Plus Upgrade Release 1 (Sound Odd) & SX	1995-04-01 00:00:00	27C040	4	IC17
550503	A	1	0217D7D6h	D7D6	WX2+	WX Plus Upgrade Release 1 (Program Even) & SX	1995-04-01 00:00:00	27C040	4	IC18
550504	A	1	01B87982h	7982	WX2+	WX Plus Upgrade Release 1 (Program Even) & SX	1995-04-01 00:00:00	27C040	4	IC19
550505	A	1	03DAB703h	B703	WX2+	WX Plus Upgrade Release 1 (Video PAL Version)	1995-04-01 00:00:00	27C040	4	IC1
550505	B	?	0214BB61h	BB61	WX2+	(Video PAL Version)		27C040	4	IC1
550505		?	03DAC143h	C143	WX2+	(Video PAL Version)	0/0/1995	27C4096
550507	A	1	02B29F47h	9F47	WX2M+	WX Plus Upgrade Release 1 (Program Odd)	1995-04-01 00:00:00	27C040	4	IC47
550507	A	?	02B24DA4h	4DA4	WX2M+	Different Checksum to other A (Program Odd)		27C040	4	IC47
550508	A	1	021B0C10h	0C10	WX2M+	WX Plus Upgrade Release 1 (Program Even)	1995-04-01 00:00:00	27C040	4	IC50
550508	A	?	021AA898h	A898	WX2M+	Different Checksum to other A (Program Even)		27C040	4	IC50
550509	G		02782CF2h	2CF2	RP2/RP3/GRP3	Out of CPU PCB 315080 Will work in later 315080/1		27C240	1
550520	A	?	02C701D3h	01D3	?			27C040
550607	A		009570FBh	70FB	RPS Stage Piano			27C1001
550630	B		005CBE19h	BE19	?	Archive Romatic		27C512
550631	C		005C9584h	9584	?	Archive 201		27C512
550632	B		005C63DFh	63DF	?	Archive 202		27C512
550637			022D3BF0h	3BF0	RP2/RP3/GRP3	Out of CPU PCB 315080/1. Will work in earlier 315080	1996-12-17 00:00:00	27C4002
550638	A	?	0567491Ch	491C	?			27C040
550639	B		005C9E0Dh	9E0D	?	Archive Classic. Code maybe 550637		27C512
550693	A		009B8D38h	8D38	H350			27C1001
557002	A	?	00686D51h	6D51	MIXER	(DSP PLUS 1.0)	1993-01-01 00:00:00	27C512
557011	B	?	00139668h	9668	?			27C256
557012	B	2	00169C6Ch	9C6C	TourMaster 15.2			27C256

This table was last updated January 26, 2021

Should you wish to add other EPROM code, or have any information updated, we would welcome you to contact us.

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