A2286 AT Bridgeboard Information Jumper and socket locations: --------------------------------------------------------------------- |Main J4 --------------------------------------| |Board |Sandwich J ::|| | | Board 1 F::|| | | 3 L::|| | | J J O::|| | | 1 6 P::|| | | 4 P::|| | | - - - - - - Y::|| | | | 80287 | ------- ::|| | | | FPU | |O-ROM| || | | - - - - - - ------- || | | ------- || | | |E-ROM| || | | ------- || | | J5 || | | || | --------------------------------------| --------------------------------------------------------------------- | Zorro Connector | | AT | | XT | ----------------------------- ------------ ----------------- Jumper Information. J4: (1-2) Internal floppy disk controller. Pins 1-2 for enabled, Pins 2-3 to disable. J5, (2-3) RAM configuration. Pins 1-2 for 640K, Pins 2-3 for 1024K. J6: (2-3) Internal disk type. Pins 1-2 for PS/2 Mode, Pins 2-3 for AT Mode. J13: Lithium battery connector. To store BIOS setup. J14: (1-2) Default video mode configuration. Pins 1-2 for Mono, Pins 2-3 for Color. There is more specific information on these and other A2286 jumpers. Technical Specifications: Function: Provides an IBM-PC/AT compatible coprocessor system for a computer in the A2000, A3000 and A4000 series. Processor: 80286 Clock Speed: 8mhz Coprocessor: Optional 80287 FPU supported. Located under sandwich board. Memory: 1MB supplied Floppy Disks: Supports up to 2 standard PC floppy disk drives: 5.25" Drives: 360KB, 1.2MB (Comes standard with 1.2MB drive) 3.5" Drives: 720KB, 1.44MB Card Type: Uses both Amiga bus and PC ISA bus. Video Display: 1. IBM-PC/AT MDA Monochrome 80x25 text mode. 2. IBM-PC/AT CGA Color text (80x25 & 40x25) and graphics (640x200x2 & 320x200x4 color) modes supported in Amiga windows simultaneously. Keyboard: IBM-PC/XT keyboard emulation using the Amiga keyboard Parallel Port: IBM-PC/AT compatible Centronics port emulation using the Amiga's parallel port. ROM: 16KB AT-compatible BIOS Interprocessor Communications: 128K of shared memory, ability for PC to interrupt Amiga and vice versa.