Duo System

Straight to individual datasheet

Duo230

Duo250

Duo270C

Duo280

Duo280C

Duo2300C

Duo full line-up at a glance

NB: Data in this table is based on Japanese versions. Some US versions may have different specification. See Apple's product description for detail.

Duo	CPU	FPU	RAM* (default) (on board/max)	HD** (2.5'')	Display***	Weight
210	68030/25MHz	-	4MB 4MB/24MB	80MB	9'' FSTN 640*400 w/16-gray scale	1.9kg
230	68030/33MHz		4MB 4MB/24MB	80MB 120MB 160MB	9'' FSTN 640*400 w/16-gray scale
250			12MB 4MB/24MB	200MB	9'' TFT 640*400 w/16-gray scale
270C		68882	12MB 4MB/24MB	240MB	8.4'' TFT 640480 w/256 colors 640400 w/32000 colors	2.2kg
280	68LC040/33MHz	-	12MB 4MB/40MB	240MB	9'' TFT 640*400 w/16-gray scale	1.9kg
280C	68LC040/33MHz	-	12MB 4MB/40MB	320MB	8.4'' TFT 640480 w/256 colors 640400 w/32000 colors	2.2kg
2300C	PPC603e/100MHz	CPU built-in	20MB 8MB/56MB	1.1GB	9.5'' TFT 640480 w/256 colors 640400 w/32000 colors	2.2kg

Pointing device: Trackball 19mm (except 2300C with trackpad).
Interface: Serial Port, 152pin PDS Port, AC Adaptor Port, and Modular Jack.
Express Modem (14400bps) is built in as default (except 210 and 230).
Size: 36*277*216mm (B/W models), 38*277*216mm (Color models)

*RAM

RAM cards for Duo are not compatible with other machines except PowerBook150. And they are so expensive! You should be careful because price of RAM is quite defferent by shops.

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**HD

Unlike desktop machines with 3.5inch hard disk, all PowerBooks use 2.5inch internal hard disk. As for Duo, most hard disks shouold be SCSI type though, 2300C and Duos upgraded to PowerPC can use both SCSI and IDE disks.

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***Display

FSTN: Supertwist Nematic LCD
TFT: Active Matrix LCD

FSTN describes the indication style of liquid cristal, on the other hand, TFT shows its driving method -- using different naming system!

Anyway, FSTN display is generally slow in indication and low in contrast. TFT is better in this sense giving beautiful and clear view, however, it is very expensive. TFT displays are widely used nowadays.

Resolution of Duo's display is 640*400 pixcels or 640*480 pixcels. Although color models have larger display, it becomes small screen when using 32000 colors display, which is a little bit annoying...

If your Duo's display needs to be replaced, there are several possibilities. Duo's logic board can work with some other types of Duo's LCDs so you can change your Duo's face!

The compatibility between Duo's logic board and LCD is summarized in the table below. Thanks to Big Muff san! :-p

Logic board - LCD compatibility

Logic Board

210
230
250
280
270c
280c
2300c

LCD
210
OK
OK
OK
N/A
N/A
N/A
OK

230
OK
OK
OK
N/A
N/A
N/A
OK

250
OK
OK
OK
**
**
**
OK

280
**
**
**
OK
OK
OK
OK

270c
N/A
N/A
N/A
OK
OK
OK
OK

280c
N/A
N/A
N/A
OK
OK
OK
OK

2300c
N/A
N/A
N/A
N/A
N/A
N/A
OK

OK: Compatible
**: Compatible with replacing a film cable for LCD
N/A: Not applicable

Back to at a glance

| Duo230 | Duo250 | Duo270C | Duo280 | Duo280C | Duo2300C |

		Logic Board
		210	230	250	280	270c	280c	2300c
LCD	210	OK	OK	OK	N/A	N/A	N/A	OK
	230	OK	OK	OK	N/A	N/A	N/A	OK
	250	OK	OK	OK	**	**	**	OK
	280	**	**	**	OK	OK	OK	OK
	270c	N/A	N/A	N/A	OK	OK	OK	OK
	280c	N/A	N/A	N/A	OK	OK	OK	OK
	2300c	N/A	N/A	N/A	N/A	N/A	N/A	OK