Acer 420 manual Memory Combinations, LAN Interface, Modem Interface, Hard Disk Drive Interface

Memory Combinations

	Slot 1		Slot 2	Total Memory
256/512MB		0 MB		256MB/512MB
256/512MB		128MB		384MB/640MB
256/512MB		256MB		512MB/768MB
256/512MB		512MB		768MB/1024MB

NOTE: Above table lists some system memory configurations. You may combine DIMMs with various capacities to form other combinations. .

LAN Interface

		Item					Specification
	Supports LAN protocol				10/100 Mbps
	LAN connector type				RJ45
	LAN connector location				Right side
	Modem Interface
		Item					Specification
	Data modem data baud rate (bps)				56K
	Supports modem protocol				V.90 MDC or Billionton
	Modem connector type				RJ11
	Modem connector location				Right side
	Hard Disk Drive Interface
	Item	Specification
	Vendor &	IBM 20G	IBM 30G	IBM 40G		Toshiba	Hitachi	Hitachi	Hitachi
	Model Name					40G	20G	30G	40G
						(MK4018)	DK23DA-	DK23DA-	DK23DA-
							20F	30F	40F
	Capacity (MB)	20000	30000	40000		40000	20000	30000	40000
	Bytes per	512	512	512		512	512	512	512
	sector
	Data heads	2	3	4		4	2	3	4
	Drive Format
	Disks	1	2	2		2	1	2	2
	Spindle speed	4200 RPM	4200 RPM	4200 RPM		4200 RPM	4200 RPM	4200 RPM	4200 RPM
	(RPM)
	Performance Specifications
	Buffer size	2048KB	2048KB	2048KB		2048	512KB	2048KB	2048KB
	Interface	ATA-5	ATA-5	ATA-5		ATA-5	ATA-5	ATA-5	ATA-5
	Max. media	130~245	125~241	130~245		156.9~	149.6~	149.6~	149.6~
	transfer rate					290.4	277.6	277.6	277.6
	(disk-buffer,
	Mbytes/s)
	Data transfer	100 MB/	100 MB/	100 MB/		100 MB/	100 MB/	100 MB/	100 MB/
	rate	Sec.	Sec.	Sec.		Sec.	Sec.	Sec.	Sec.
	(host~buffer,	Ultra DMA	Ultra DMA	Ultra DMA		Ultra DMA	Ultra DMA	Ultra DMA	Ultra DMA
	Mbytes/s)	mode-5	mode-5	mode-5		mode-5	mode-5	mode-5	mode-5
	DC Power Requirements
	Voltage	5V(DC) +/-	5V(DC) +/-	5V(DC) +/-		5V(DC) +/-	5V(DC) +/-	5V(DC) +/-	5V(DC) +/-
	tolerance	5%	5%	5%		5%	5%	5%	5%
24									Chapter 1