Laser Magnetic Storage International

Laser Magnetic Storage International (LMSI) was a subsidiary of Philips that designed and manufactured optical and magnetic media.^[3] It began as a joint venture between Philips and Control Data Corporation.^[4] It later became Philips LMS.^[5]

Laser Magnetic Storage International

Company type	Subsidiary
Industry	Data storage
Founded	April 1986; 39 years ago (1986-04) in Mississauga, Ontario[1][2]
Defunct	July 1992 (1992-07)
Fate	Reorganized
Successor	Philips LMS
Products	Optical and magnetic media
Parent	Philips Control Data (1986–1992)

Products

LMSI built the Philips CM 100, the world's first CD-ROM drive (pictured).

LMSI developed a proprietary CD-ROM interface. Early iterations relied on many 7400-series 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 on the CM 260 for example.

External CD-ROMs, LMSI interface

• CDD 401: 1× speed (rebranded CM 221)^[6][7]
• CDD 461: 1× speed^[8]
• CDD 462: 1× speed (same as CDD 461 but with multi-session support)^[9]
• CM 50: 1× speed
• CM 100: 1× speed^[10][11] – the world's first CD-ROM drive^[12]
• CM 121: 1× speed
• CM 221: 1× speed
• CM 225: ?× speed^[13]

External CD-ROMs, SCSI interface

• CDD 521: 2× speed^[14]
• CDD 522: 2× speed^[15]
• CDD 552: ?× speed^[16]
• CDD 2000: 4× speed^[17]
• CDD 2600: 6× read, 2x write^[18]
• CM 110: ?× speed^[19]
• CM 231: 1× speed^[3]
• CM 234: ?× speed^[9]

Internal CD-ROMs, LMSI interface

• CM 201: 1× speed^[20][11]
• CM 205: 1× speed
• CM 206: 2× speed^[21]
• CM 210: ?× speed^[20][11]

Internal CD-ROMs, SCSI interface

• CM 121: 1× speed^[22]
• CM 201: 1× speed^[23][22]
• CM 204: ?× speed^[3]
• CM 212: ?× speed
• CM 214: ?× speed^[3][9]
• PCA80SC: 8× speed^{[citation needed]}

Internal CD-ROMs, IDE interface

• CDD 3610: 6× speed
• CDD 3801: 32× speed
• CDD 4201: ?× speed
• CDD 4401: ?× speed
• CDD 4801: ?× speed
• CM 202: 2× speed^[24][25]
• CM 207: ?× speed^[26]
• CM 208: ?× speed
• CM 218: ?× speed

ISA LMSI controller cards

• 

  LMSI CM 153, ISA CD-ROM interface board

CM 153: 8-bit ISA (coupled with the CM 100 and the CM 201)^[27][28]

• CM 155: 8-bit ISA (coupled with the CM 100, the CM 201 and the CM 210)^[29][11]
• CM 50 interface: 8-bit ISA (coupled with the CM 50)^[30]
• CM 250: 8-bit ISA (coupled with the CM 205)^[31][27]
• CM 260: 16-bit ISA (coupled with the CM 206)^[32][27]

Motherboard-integrated

• Certain Tandy Sensation models featured a LMSI controller PCB connected to the motherboard.^[33]
• The proprietary 16-pin 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 DB-15 connector for external LMSI devices (the DB-15 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 16-bit ISA cards with the Aztech AZTPR16 DSP (FCC ID 138-MMSN808)
• Magnetic products were geared towards corporate mini computer environments (like the IBM AS/400):^[34]
  • LD 510: internal SCSI MO drive
  • LD 520: external MO drive
  • LD 1200: external WORM drive^[27]
  • LD 4100: cartridge optical storage^[35]
  • LD 6100: external WORM drive
  • LF 4500: cartridge optical storage^[35]