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]

Products

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 – 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

• 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:
• Cm153-1.jpg CM 153: 8-bit [[Industry Standard Architecture|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]