UNIDENTIFIED SUPER TURBO-XT Processor 8088 (exact location is unknown) Processor Speed 4.77/12MHz Chip Set Unidentified Max. Onboard DRAM 1MB Cache None BIOS Unidentified Dimensions 220mm x 220mm I/O Options None NPU Options 8087(exact location is unknown) [Image] CONNECTIONS Purpose Location Purpose Location Power LED CN3 Keylock CN6 Reset switch CN4 Turbo LED CN7 Speaker CN5 Turbo switch CN8 USER CONFIGURABLE SETTINGS Function Jumper Position » CPU type select NEC V20 J5 Closed CPU type select 8088 J5 Open » RAM wait state select 0 wait J6 Closed state RAM wait state select 1 wait J6 Open state » ROM wait state select 0 wait J7 Closed state ROM wait state select 1 wait J7 Open state » Factory configured - do not J8 Closed alter » Parity check disabled SW1/1 On Parity check disabled SW1/1 Off » NPU disabled SW1/2 On NPU enabled SW1/2 Off DRAM CONFIGURATION Size Bank 0 Bank 1 Bank 2 Bank 3 Bank 4 256KB (2) 414256 NONE NONE NONE NONE 512KB (2) 414256 (2) 414256 NONE NONE NONE 640KB (2) 414256 (2) 414256 (4) 41464 NONE NONE 1MB (2) 414256 (2) 414256 NONE (2) 414256 (2) 414256 DRAM CONFIGURATION (PARITY) Size Parity 0 Parity 1 Parity 2 Parity 3 Parity 4 256KB (1) 41256 NONE NONE NONE NONE 512KB (1) 41256 (1) 841256 NONE NONE NONE 640KB (1) 41256 (1) 41256 (2) 4164 NONE NONE 1MB (1) 41256 (1) 41256 NONE (1) 41256 (1) 41256 Note:If SW1 is disabled, parity chips are not needed. DRAM SWITCH CONFIGURATION Size SW1/3 SW1/4 0KB On On 256KB Off On 512KB Off On 640KB On Off 1MB Off Off MONITOR CONFIGURATION Type SW1/5 SW1/6 None installed On On Monochrome Off Off VGA (40 x 25) Off On VGA (80 x 25) On Off Note: Without ERSO BIOS 3301 installed. MONITOR CONFIGURATION Type SW1/5 SW1/6 Monochrome On On VGA (40 x 25) Off On VGA (80 x 25) On Off Note: With ERSO BIOS 3301 installed. DISK DRIVE CONFIGURATION Drives installed SW1/7 SW1/8 1 On On 2 Off On 3 On Off 4 Off Off