Laser Magnetic Storage International

Laser Magnetic Storage International (LMSI) was a subsidiary of Philips that designed and manufactured optical and magnetic media.^[1] It began as a joint venture between Philips and Control Data Corporation.^[2] It later become Philips LMS.

Products

LMSI Interface LMSI developed a proprietary CD-ROM interface. Early iterations relied on many Philips chips: on the CM 153 card for example. Later on this bus was based on the highly integrated NCR chip: NCR @DIGBIE LMS 97644845-00 0390471 F851480 N9205: on the CM 260 for example.

External CD-ROMs, LMSI interface:

• CDD 401: ?X speed.^[3][4]
• CDD 461: 1X speed.^[5]
• CDD 462: ?X speed.^[6]
• CDD 2600: 6X speed.^[7]
• CM 50: ?X speed.
• CM 100: ?X speed.^[8][9]
• CM 121: ?X speed.
• CM 225: ?X speed.^[10]

External CD-ROMs, SCSI interface:

• CDD 521: 2X speed.^[11]
• CDD 522: 2X speed.^[12]
• CDD 552: ?X speed.^[13]
• CDD 2000: ?X speed.^[14]
• CDD 2600: 6X speed.^[15]
• CM 110: ?X speed.^[16]
• CM 221: ?X speed.
• CM 231: ?X speed.^[17]
• CM 234: ?X speed.^[18]

Internal CD-ROMs, LMSI interface:

• CM 201: ?X speed.^[19][20]
• CM 205: 1X speed.
• CM 206: 2X speed."InfoWorld".
• CM 210: ?X speed.^[21][22]

Internal CD-ROMs, SCSI interface:

• CM 121: ?X speed.^[23]
• CM 201: ?X speed.^[24][25]
• CM 204: ?X speed.^[26]
• CM 212: ?X speed.
• CM 214: ?X speed.^[27][28]

Internal CD-ROMs, IDE interface:

• CDD 3610: 6X speed.
• CDD 3801: 32X speed.
• CDD 4201: ?X speed.
• CDD 4401: ?X speed.
• CDD 4801: ?X speed.
• CM 202: 2X speed.^[29][30]
• CM 207: ?X speed.^[31]
• CM 208: ?X speed.
• CM 218: ?X speed.

ISA LMSI Controller Cards:

• CM 153: 8BIT ISA (coupled with the CM 100 & CM 201).^[32]
• CM 155: ?BIT ISA (coupled with the CM 100, CM 201 & CM 210)^[33][34]
• CM 50 interface: 8BIT ISA (coupled with the CM 50)^[35]
• CM 250: 8BIT ISA (coupled with the CM 205).^[36][37]
• CM 260: 16BIT ISA (coupled with the CM 206).^[38][39]

The proprietary 16PIN LMSI CD-ROM interface was relatively short lived and existed on LMSI interface cards and a few ISA sound cards. These sound cards only have internal LMSI connectors; not the external DB15 connector for external LMSI devices (the DB15 on sound cards is the game port / UART MPU-401):

• Sound Blaster Pro 2 CT1620
• Sound Blaster 16 ASP CSP CT1780
• Media Vision Jazz 16 LMSI
• Pro Audio Spectrum LMSI
• Pro Audio 16 LMSI
• Generic 16BIT ISA PCBs with the AZTECH AZTPR16 DSP, FCC ID 138-MMSN808

Magnetic products were geared towards corporate mini computer environments (like the IBM AS/400).^[40]

• LD 510: internal SCSI MO drive.
• LD 520: external MO drive.
• LD 1200: external WORM drive.^[41]
• LD 4100: cartridge optical storage.^[42]
• LD 6100: external WORM drive.
• LF 4500: cartridge optical storage.^[42]

References