; ; Altos M1 486/50 CPU Board Configuration File ; BOARD ID = "ACR15c1" NAME = "M1 486/50 CPU Board" MFR = "Acer/Altos Computer Systems" CATEGORY = "CPU" SLOT = OTH,"M1_CPU" AMPERAGE = 2700 READID = YES IOCHECK = INVALID DISABLE = UNSUPPORTED COMMENTS = "This board contains a 50MHz 80486 CPU with external 2nd Level Cache and System BIOS ROM." IOPORT(1) = 022h ;DRAM Controller index register SIZE = BYTE INITVAL = xxxxxxxx IOPORT(2) = 023h ;DRAM Controller data register SIZE = BYTE INITVAL = xxxxxxxx FUNCTION = "CPU Type" TYPE = "CPU,80486,50" COMMENTS = "The CPU on this board is a 50MHz 80486 with 8KB of internal cache." CHOICE = "50MHz 80486" FUNCTION = "Cache Type" TYPE = "CACHE,discrete,50" CHOICE = "50MHz Discrete" FUNCTION = "CPU System Memory" TYPE = "MEM,BIOS" CHOICE = "64K ROM BIOS" FREE MEMORY = 64k ADDRESS = 0F0000h WRITABLE = NO MEMTYPE = OTH CACHE = YES SHARE = NO INIT = PORTADR(22h) 00100001 ;21h - ID register INIT = PORTADR(23h) 00000001 ;Allow access to B1 INIT = PORTADR(22h) 00001001 ;09h INIT = PORTADR(23h) 000r0rrr ;64K BIOS size CHOICE = "128K ROM BIOS" FREE MEMORY = 128k ADDRESS = 0e0000h WRITABLE = NO MEMTYPE = OTH CACHE = YES SHARE = NO INIT = PORTADR(22h) 00100001 ;21h - ID register INIT = PORTADR(23h) 00000001 ;Allow access to B1 INIT = PORTADR(22h) 00001001 ;09h INIT = PORTADR(23h) 000r1rrr ;128K BIOS size FUNCTION = "Math Coprocessor" TYPE = "NPX,80487" COMMENTS = "The Floating Point Unit is internal to the 80486 CPU and functionally equivalent to the 80387 Numeric Coprocessor." CHOICE = "internal 80487 FPU" FREE IRQ = 13 SHARE = YES TRIGGER = EDGE ; ******************************************************************* ; Revision History: ; 11/10/91 kpf ; Changed MEMTYPE from SYS to OTH for ROM BIOS area ; 12/02/91 kpf ; Removed references to TurboCache ; 02/06/92 kpf ; Leave bit D4 of Mode Register B (offset 09h) of 82359 unchanged.