;
; Altos M1 486/20 CPU Board Configuration File
;
BOARD
  ID       = "ACR1381"
  NAME     = "M1 486/20 CPU Board"
  MFR      = "Acer/Altos Computer Systems"
  CATEGORY = "CPU"
  SLOT     = OTH,"M1_CPU"
  AMPERAGE = 2300
  READID   = YES
  IOCHECK  = INVALID
  DISABLE  = UNSUPPORTED
  COMMENTS = "This board contains a 20MHz 80486 CPU 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


JUMPER(1) = 2
  NAME = "JP1"
  JTYPE = INLINE
  VERTICAL = NO
  REVERSE = YES
  LABEL = LOC(1 2 3) "1" "2" "3"
  INITVAL = LOC(1^2 2^3) 00
  FACTORY = LOC(1^2 2^3) 00
  COMMENTS = "This jumper identifies the type of CPU chip installed."
  HELP = "No jumper means a 80486 CPU is installed, a jumper across
  	pins 1 and 2 means a 80487 CPU, and a jumper installed across
	pins 2 and 3 means a 80486SX CPU is installed."


FUNCTION = "CPU Type"
  TYPE     = "CPU,80486,20"
  COMMENTS = "The CPU on this board is a 20MHz 80486
		with 8KB of internal cache."
  CHOICE   = "20MHz 80486"


FUNCTION = "CPU System Memory"    
  TYPE     = "MEM,BIOS"

  CHOICE   = "ROM BIOS"
	FREE
	MEMORY = 64k
		ADDRESS = 0F0000h
		WRITABLE = NO
		MEMTYPE = SYS
		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) 00000rrr	;64K 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