Alpha Chip List

This is an overview of ICs used in Alpha systems. Listed are the ICs with a well-known function (i.e., system chipset, network chip, etc). The main CPU however, is not included in the list.

Note that the list is still under construction; I will augment the list as I collect more Alpha systems.

Table 1: Alpha Systems Chip List

System	Core Logic	Std. I/O	Bus	RTC/NVRAM	Net/PHY	SCSI	Sound/VGA	Notes
Alpha XL
XL300	21172-BA 21172-CA DC7560A	N8242PC PC87312VF	S82378ZB	DS1287A / DS1225AD	21040-AA	53C810A	-
AlphaStation 200
4/166	21071-BA 21071-CA 21071-DA	N82C42PE PC87332VLJ	S82378ZB	?	21040-AA	53C810	CS4231A-KL / -
AlphaStation 255
255/233	21071-BA 21071-CA 21071-DA	PC87303IAT	S82378ZB	(1)	21040-AA	53C810A	(2) / -	(1) Provided by PC87303? (2) Analog Devices chip, covered by other component.
AlphaStation 500
500/266	21172-BA 21172-CA DC7560A	N8242PC PC87312VF	S82374SB S82375SB	DS1287 / M48Z18	21040-AA	ISP1020A	CS4231A-KL / -
500/500	21172-BA 21172-CA DC7560A	N8242PC PC87312VF	S82374SB S82375SB	DS1287 / M48Z18	21040-AB	ISP1020A	CS4231A-KL / -
AlphaStation XP1000
67/667	DC1046C DC1047B DC1048E	FDC37C669 CY82C693UB	21152-AB	(1)	21143PD / ML6698	ISP1040C	ES1887F / -	(1) Provided by 82C693?
AlphaServer 800
5/500	21172-BA 21172-CA	N8242PC PC16552DV PC87332VLJ	S82374SB S82375SB	DS1287 / DS1225AD	-	ISP1040B	- / 86C765
AlphaServer 1000A
5/300?	?	?	?	?	?	?	? / -
AlphaServer 4100
5/300	DC1034A DC7580B	N8242PC PC87312VF	S82374SB S82375SB	DS1287	-	53C810	- / -
5/466	DC1034A DC7580B	N8242PC PC87312VF	S82374SB S82375SB	DS1287	-	53C810	- / -
5/600	DC1034B DC7580B	N8242PC PC87312VF	S82374SB S82375SB	DS1287	-	53C810	- / -
AlphaServer DS10/DS10L
6/466	DC1046C DC1047B DC1048E	M1543C PC16552DV	?	DS12887	21143TD / ML6698	-	- / -	UNKN: QL2005-XPF144C
67/600	DC1046C DC1047B DC1048E	M1543C PC16552DV	?	DS12887	21143TD / ML6698	-	- / -	UNKN: QL2005-XPF144C
AlphaServer DS15
68/1000	21-49953-03 21-49954-02 21-50023-03	M1543C PC16552DV	-	DS12887	82559ER	AIC-7899G	- / -	UNKN: CY7C006A-20AC, XC4013XLA, Zircon 2405226
AlphaServer DS20E
67/667	?	?	?	?	-	?	- / -
AlphaServer ES45
68/1250	21-49953-03? 21-49954-02 21-50023-03	?	?	?	-	?	- / -
AlphaServer ES47
7/1150	21-56480-03	ISP1561BM SC28L194A SiI0649CL160	N/A	M4T28-BR12SH1	82559ER	AIC-7892B	- / -	UNKN: ElanSC520, ispLSI 2064VE, Spartan XC2S100
AXPvme
166	?	Z85C3016	S82378IB VIC64-NC	DS1386	21040-AB	53C810	- / -	UNKN: CY7C964, N82C542, TC160G70HF
DECpc
AXP 150	?	VL82C106-FC	NG82357 NG82358-DT S82352	(1)	-	-	- / -	(1) Provided by VL82C106-FC.
Digital Server 3300
5/400	21172-BA 21172-CA	N8242PC PC16552DV PC87332VLJ	S82374SB S82375SB	DS1287 / M48Z18	-	ISP1040B	- / 86C765
Flexor A264
	DC1046C DC1047B DC1048E	CY82C693UB PC97338VJG	?	(1)	-	-	ES1879S (2) / -	(1) Provided by 82C693? (2) Optional.
Multia
VX40	?	N8242PC PC87312VF	S82378ZB	?	21040-AA	53C810	CS4231A-KL / 21030-AA + BT485AKPJ	UNKN: TC14L040AF TODO: Unidentified IC under CMOS battery
Personal WorkStation
500a	?	CY82C693UB FDC37C669	21152-AA	(1)	21143-PC / DP83840AV	ISP1040B	ES1887F / -	(1) Provided by 82C693? TODO: 2 chips not identified (heatsink or label cover).

Following is a table with a short description of the chips used in the Alpha systems along with a link to the manual or datasheet of the respective chip. The chips and descriptions are categorized by the columns of the Alpha Systems Chip List table.

Table 2: Chip Description

Chip	Description
Core Logic
21071-BA	Data path chip.
21071-CA	Cache/memory controller.
21071-DA	PCI interface.
21171-BA	Data Switch chip (DSW).
21171-CA	Control, I/O, and address chip (CIA).
21172-BA	Data Switch chip (DSW).
21172-CA	Control, I/O, and address chip (CIA).
21174	21164 interface chip (PCI, memory, cache).
DC1034A	? (used on 300 MHz CPU board, AS4100).
DC1034B	? (used on 600 MHz CPU board, AS4100).
21272-C1/DC1046C	Controller chip (C-chip).
21272-D1/DC1047B	Data slice chip (D-chip).
21272-P1/DC1048E	Peripheral interface chip (P-chip).
21274-D1	Data slice chip (D-chip).
21274-C1	Controller chip (C-chip).
21-49953-03	Controller chip (C-chip).
21-49954-02	Data path chip (D-chip).
21-50023-03	Peripheral interface chip (P-chip).
21-56480-03	IO7 ASIC (Marvel systems).
DC7560A	GRU ASIC??
DC7580B	? (used on DRAM memory board, AS4100).
Std. I/O
CY82C693UB	PCI peripheral controller (USB, IDE, ISA, RTC, keyboard, APM).
FDC37C669	Super I/O, floppy disk controller with IR support. (PnP)
ISP1561BM	Hi-speed USB controller.
M1543C	PCI-to-ISA bridge with Super I/O and Fast IR. (PnP, ACPI)
N82C42PE	8-bit MCU with keyboard controller firmware for AT and PS/2 platforms. Also supports mouse.
N82C42PE	8-bit MCU with keyboard controller firmware for PS/2 platforms. Also supports mouse.
PC16552DV	Dual UART with FIFOs.
PC87303IAT	SuperI/O Sidewinder Lite, floppy disk controller, keyboard controller, real-time clock, dual UARTs, IEEE 1284 parallel port, and IDE interface.
PC87312VF	SuperI/O II/III, floppy disk controller with dual UARTs, parallel port, and IDE interface.
PC87332VLJ	SuperI/O III, floppy disk controller, dual UARTs, IEEE 1284 parallel port, and IDE interface.
PC97338VJG	SuperI/O, floppy disk controller, dual UARTs, IEEE 1284 port, Fast IR. (PnP, ACPI)
SC28L194A	Quad UART with FIFOs.
SiI0649CL160	IDE controller.
VL82C106-FC	Combination I/O chip.
Z85C3016	Dual channel serial communications controller (16 MHz).
Bus
21150	PCI-to-PCI bridge.
21152-AB	PCI-to-PCI bridge.
NG82357	Integrated System Peripheral controller. (DMA & PIC)
NG82358-DT	EISA bus controller.
S82352	EISA bus buffer.
S82374SB	EISA system component.
S82375SB	PCI-to-EISA bridge.
S82378ZB	System I/O, PCI-to-ISA bridge.
S82378IB	System I/O, PCI-to-ISA bridge.
VIC64-NC	VMEbus interface controller.
RTC/NVRAM
DS1287	Real-Time clock.
DS1287A	Real-Time clock.
DS1225AD	64K non-volatile SRAM.
DS12887	Real-Time clock.
DS1386	RAMified watchdog timerkeeper (RTC).
M48Z18	8K zero-power SRAM.
M4T28-BR12SH1	Real-Time clock.
Net/PHY
21040-AA	10 Mb Ethernet controller.
21142-PA/TA	10/100 Mb Ethernet controller.
21143-PC/PD	10/100 Mb Ethernet controller.
DP83840AV	10/100 Mb PHY.
82559ER	Fast Ethernet controller.
ML6698	100Base-TX PHY interface.
SCSI
53C810/A	FastSCSI I/O processor, single-ended, narrow.
AIC-7892B	Single-channel Ultra160 SCSI chip.
AIC-7899G	Dual-channel Ultra160 SCSI chip.
ISP1020A	FastSCSI I/O processor, wide.
ISP1040B	UltraSCSI I/O processor, wide.
ISP1040C	UltraSCSI I/O processor, wide.
Sound/VGA
21030-AA	Graphics accelerator (TGA).
86C765	S3 Trio64V+ PCI VGA graphics.
BT485AKPJ	170 MHz True-Color RAMDAC.
CS4231A-KL	16-bit multimedia audio codec.
ES1879S	16-bit audio codec.
ES1887F	16-bit audio codec.
Notes
CY7C006A-20AC	16K dual-port SRAM.
CY7C964	Bus interface logic circuit (VMEbus).
ElanSC520	x86-compatible microcontroller (Am5x86).
ispLSI 2064VE	High-density programmable logic device.
N82C542	Programmable timer/counter.
QL2005-XPF144C	QuickLogic FPGA.
TC14L040AF	Toshiba gate array.
TC160G70HF	Toshiba gate array.
XC2S100	Xilinx Spartan-II FPGA.
XC4000X	Xilinx FPGA.
Zircon 2405226	Qlogic baseboard management controller.