193-313 IBM PLANAR UPGRADES FOR PS/2 MODELS 50, 50Z, 55 SX AND 55 LS The PS/2 (R) Planar Upgrade for Models 50 and 50Z and PS/2 Planar Upgrade for Models 55 SX and 55 LS feature the IBM 486SLC2 25-50MHz microprocessor for upgrade of all PS/2 Model 50, 50Z, 55 SX and 55 LS system units. The IBM 486SLC2 25-50MHz microprocessor operates at the clock speed of 50MHz for the internal operations and 25MHz for external operations. An integrated memory cache controller and 16KB memory cache are also included. These new planar upgrades enhance the processing power of the upgraded system by allowing internal operations at higher speed and 16-bit data path. In addition, two fixed disk drive upgrade kits are offered to support the planar upgrades being announced -- one for the PS/2 Models 50 and 50Z -- one for the PS/2 Models 55 SX and 55 LS. These kits provide all the necessary parts and components to: o Add a second fixed disk drive -- IDE interface o Replace existing fixed disk drive with IDE fixed disk drive o Replace existing fixed disk drive with IDE fixed disk drive and add a second IDE fixed disk drive. Single Part Unit Description Number Price PS/2 Model 50, 50Z Planar Upgrade (all models) 32G3279 $899 PS/2 Model 55 SX/LS Planar Upgrade (all models) 32G3283 899 PS/2 Fixed Disk Drive Upgrade Kit for Models 50, 50Z 32G3323 20 PS/2 Fixed Disk Drive Upgrade Kit for Models 55 SX/LS 32G3327 55 Availability Date: October 12, 1993. (R) Registered trademark of International Business Machines Corporation. IN BRIEF . . . o Features IBM 486SLC2 25-50MHz microprocessor o 486 compatible instruction set o Internal memory cache controller and integrated 16KB cache memory o Enhances system performance, especially for compute-intensive applications o Allows upgrades of PS/2 Models 50 and 50Z and PS/2 Models 55 SX and LS o 16MB real memory addressability (15.936MB user addressable) o SVGA video up to 1024 x 768 pixels (1MB video memory standard) o 1024 x 768 non-interlaced up to 256 colors o 800 x 600, up to 64K colors o 640 x 480, up to 16 million colors o Integrated IDE interface supports an additional IDE fixed disk drive o Existing fixed disk drive (ST506 or ESDI) still functional/usable o Ability to remove existing fixed disk drive and have support for two IDE fixed disk drives o Planar memory support of 70ns, 80ns and 85ns memory SIMMs o 4MB 70ns SIMM comes standard with planar with two additional SIMM sockets for memory expansion