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

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 – NCR © DIGBIE LMS 97644845-00 0390471 on the CM 260 for example.

External CD-ROMs, LMSI interface CDD 401: 1× speed (rebranded CM 221) CDD 461: 1× speed CDD 462: 1× speed (same as CDD 461 but with multi-session support) CM 50: 1× speed CM 100: 1× speed – the world's first CD-ROM drive CM 121: 1× speed CM 221: 1× speed CM 225: ?× speed

External CD-ROMs, SCSI interface CDD 521: 2× speed CDD 522: 2× speed CDD 552: ?× speed CDD 2000: 4× speed CDD 2600: 6× read, 2x write CM 110: ?× speed CM 231: 1× speed CM 234: ?× speed

Internal CD-ROMs, LMSI interface CM 201: 1× speed CM 205: 1× speed CM 206: 2× speed CM 210: ?× speed

Internal CD-ROMs, SCSI interface CM 121: 1× speed CM 201: 1× speed CM 204: ?× speed CM 212: ?× speed CM 214: ?× speed 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 CM 207: ?× speed CM 208: ?× speed CM 218: ?× speed

ISA LMSI controller cards CM 153: 8-bit ISA (coupled with the CM 100 and the CM 201) CM 155: 8-bit ISA (coupled with the CM 100, the CM 201 and the CM 210) CM 50 interface: 8-bit ISA (coupled with the CM 50) CM 250: 8-bit ISA (coupled with the CM 205) CM 260: 16-bit ISA (coupled with the CM 206)

Motherboard-integrated Certain Tandy Sensation models featured a LMSI controller PCB connected to the motherboard. 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): LD 510: internal SCSI MO drive LD 520: external MO drive LD 1200: external WORM drive LD 4100: cartridge optical storage LD 6100: external WORM drive LF 4500: cartridge optical storage

References