Data bus:	32-bit PCI
Size:	Three-quarter length, full-height card
Hard drive supported:	Up to seven SCSI-2 or Fast SCSI-2 devices (PM2124/PM2124-MAC) Up to fifteen Wide SCSI-2 devices (PM2124W/PM2124W-MAC)
Floppy drives supported:	None

CONNECTIONS (CM4000 CACHING MODULE)
Function	Location
Fault LED (red)	DS1
ECC enabled LED (green)	DS2
Proprietary CM4000 connector - caching board to controller	J1
Proprietary CM4000 connector - caching board to controller	J2
Note: Proprietary connectors J1 and J2 are on the reverse side of the board.

CONNECTIONS (CONTROLLER)
Function	Location
50/68-pin SCSI connector - external	J11
Proprietary CM4000 connector - controller to caching board	P1
Proprietary CM4000 connector - controller to caching board	P2
3-pin connector - factory test LED	P4
4-pin connector - drive active LED	P6
Proprietary DM4000 (disk array module) connector	P5
Proprietary DM4000 (disk array module) connector	P7
50/68-pin SCSI connector - internal	P10
LED - adapter busy	LED1
LED - computer bus transfer to adapter	LED2
LED - computer bus transfer from adapter	LED3
LED - cache hit	LED4
LED - disk read/ahead active	LED5
LED - disk read	LED6
LED - disk write	LED7
LED - adapter reset	LED8
LED - interrupt to computer pending	LED9
LED - DRQ to computer asserted	LED10
Note: 50-pin ports are on models PM2124 and PM2124-MAC. 68-pin ports are on the PM2124W and PM2124W-MAC.

CACHING MODULE DRAM CONFIGURATION
Size	Bank 0	Bank 1	Bank 2	Bank 3
1MB	(1) 256K x 36	None	None	None
1MB	None	(1) 256K x 36	None	None
1MB	None	None	(1) 256K x 36	None
1MB	None	None	None	(1) 256K x 36
2MB	(1) 256K x 36	(1) 256K x 36	None	None

DRAM CONFIGURATION (CONTINUED)
Size	Bank 0	Bank 1	Bank 2	Bank 3
2MB	None	(1) 256K x 36	(1) 256K x 36	None
2MB	None	None	(1) 256K x 36	(1) 256K x 36
3MB	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36	None
3MB	None	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36
3MB	(1) 256K x 36	None	(1) 256K x 36	(1) 256K x 36
3MB	(1) 256K x 36	(1) 256K x 36	None	(1) 256K x 36
4MB	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36	(1) 256K x 36
4MB	(1) 1M x 36	None	None	None
4MB	None	(1) 1M x 36	None	None
4MB	None	None	(1) 1M x 36	None
4MB	None	None	None	(1) 1M x 36
8MB	(1) 1M x 36	(1) 1M x 36	None	None
8MB	None	(1) 1M x 36	(1) 1M x 36	None
8MB	None	None	(1) 1M x 36	(1) 1M x 36
12MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	None
12MB	None	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
12MB	(1) 1M x 36	None	(1) 1M x 36	(1) 1M x 36
12MB	(1) 1M x 36	(1) 1M x 36	None	(1) 1M x 36
16MB	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36	(1) 1M x 36
16MB	(1) 4M x 36	None	None	None
16MB	None	(1) 4M x 36	None	None
16MB	None	None	(1) 4M x 36	None
16MB	None	None	None	(1) 4M x 36
32MB	(1) 4M x 36	(1) 4M x 36	None	None
32MB	None	(1) 4M x 36	(1) 4M x 36	None
32MB	None	None	(1) 4M x 36	(1) 4M x 36
48MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	None
48MB	None	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36
48MB	(1) 4M x 36	None	(1) 4M x 36	(1) 4M x 36
48MB	(1) 4M x 36	(1) 4M x 36	None	(1) 4M x 36
64MB	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36	(1) 4M x 36
Notes: Although not shown above, 1MB, 4MB and 16MB SIMMs can be combined and DPT ECC SIMMs can replace parity SIMMs of 4MB or 16MB. Single sided SIMMs are preferred, but low-profile double sided 2MB and 8MB increments are supported.