Apple Chip Designations

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Vintage Apple Computer Inc. - IC part numbers (designations).

Number Model Chip Description
331-0931-B II+ Custom Keyboard Controller
341-0001-00 II+ ROM 2kb*8 Integer BASIC (E0)
341-0002-00 II+ ROM 2kb*8 Integer BASIC (E8)
341-0003-00 II+ ROM 2kb*8 Integer BASIC (F0)
341-0004-00 II+ ROM 2kb*8 Non Autostart Monitor (F8), complete set: 341-0001-00, 341-0002-00, 341-0003-00 and optional 341-0016-00
342-0007 ISA Bus ROM Apple LocalTalk PC Card, Firmware
342-0007-B ISA Bus ROM Apple LocalTalk PC Card, Firmware
341-0008 342-0008-A AppleBus Card PROM 256*8 (TBP28L22N or 6309) Communication Card 670-9003 (RS-232 via 6850)
341-0009 AppleBus Card PROM 256*8 (TBP28L22N or 6309) 13 Sector Drive Controller P5 ROM (firmware)
341-0010 AppleBus Card PROM 256*8 (TBP28L22N or 6309) 13 Sector Drive Controller P6 ROM
341-0011 II+ ROM 2kb*8 Applesoft BASIC (D0)
341-0012 II+ ROM 2kb*8 Applesoft BASIC (D8)
341-0013 II+ ROM 2kb*8 Applesoft BASIC (E0)
341-0014 II+ ROM 2kb*8 Applesoft BASIC (E8)
341-0015 II+ ROM 2kb*8 Applesoft BASIC (F0)
341-0016-00 II, II+ ROM 2kb*8 Programmer's Aid #1 (D0)
341-0020 II+ ROM 2kb*8 Autostart Monitor ROM (F8), complete set: 341-0011, 341-0012, 341-0013, 341-0014, 341-0015
341-0021-00 II+ ROM 2kb*8 probably part of Basic
341-0026-00 AppleBus Card ROM Graphics Tablet Interface
341-0027-A AppleBus Card PROM 256*8 (TBP28L22N or 6309) 16 Sector Drive Controller P5 ROM (firmware)
341-0028-01 341-0028-A AppleBus Card, III PROM 256*8 (TBP28L22N or 6309) 16 Sector Drive Controller P6 ROM
341-0030 342-0030 III ROM 2kb*8 Video elements/attributes generator
341-0031-01 342-0031 III ROM 8kb*8 BIOS, Kernel
341-0032-00 III ROM Video Mode Select
342-0033-A IIc ROM 32kb*8 Monitor ROM $00
341-0034-A 342-0034-B ImageWriter II, LQ ROM 8kB*8 Firmware (LocalTalk Option)
341-0035 342-0035 IIc, IIe, III KR3600-075B1 Keyboard Controller
341-0036 II+ ROM Character ROM (Rev.7+)
341-0041 III PROM CASB65 PROM (old)
341-0042 III PROM CAS128 PROM (4116 / 12V)
341-0043 342-0043 III PROM Status PROM
341-0044 III PROM RAS128 PROM (4116 / 12V)
341-0045 342-0045-A III PROM I/O Address generator
341-0046 342-0046 III PROM Timing Logic
341-0052 III PROM Video/main memory bank select
341-0055 342-0055-A III PROM Video/main memory bank select
341-0056 342-0056-A III PROM CASB65 PROM
341-0057 III PROM 512*8 Universal Parallel Interface
341-0059-A AppleBus Card ROM 2kb*8 IEEE-488 Interface Card 1980
341-0060 III ROM 2kb*8 Video scan decode ROM 50 Hz
341-0061-A 342-0061 III PROM RAS256 PROM (4164 / 5V)
341-0062-A III PROM CAS128 PROM (4164 / 5V)
341-0063-A 342-0063-A III PROM CAS256 PROM (4164 / 5V)
341-0065-A AppleBus Card ROM 2kb*8 Super Serial Card ROM
341-0066-A ProFile PROM ProFile Controller PROM (U29)
341-0067-A ProFile PROM ProFile Controller PROM (U37)
341-0068-A ProFile PAL 16L8 ProFile Controller PAL (U27)
342-0077-A IIgs ROM 128kb*8 or 256kb*8 ROM-00
342-0077-B IIgs ROM 128kb*8 or 256kb*8 ROM-01
341-0080 ProFile 5MB ROM 2kb*8, Z8601 ProFile 5MB RW Z8 version 3.97
341-0080-B ProFile 5MB ROM 2kb*8, Z8601 ProFile 5MB RW Z8 version 3.98
342-0081-A LaserWriter ROM LaserWriter Printer 512K Rev 2 L0 ROM
342-0082-A LaserWriter ROM LaserWriter Printer 512K Rev 2 H0 ROM
342-0083-A LaserWriter ROM LaserWriter Printer 512K Rev 2 L1 ROM
342-0084-A LaserWriter ROM LaserWriter Printer 512K Rev 2 H1 ROM
342-0085-A LaserWriter ROM LaserWriter Printer 512K Rev 2 L2 ROM
342-0086-A LaserWriter ROM LaserWriter Printer 512K Rev 2 H2 ROM
342-0087-A LaserWriter ROM LaserWriter Printer 512K Rev 2 L3 ROM
342-0088-A LaserWriter ROM LaserWriter Printer 512K Rev 2 H3 ROM
342-0089-A LaserWriter Plus ROM LaserWriter Plus Printer 512K Rev 2 L0 ROM
342-0090-A LaserWriter Plus ROM LaserWriter Plus Printer 512K Rev 2 H0 ROM
342-0091-A LaserWriter Plus ROM LaserWriter Plus Printer 512K Rev 2 L1 ROM
342-0092-A LaserWriter Plus ROM LaserWriter Plus Printer 512K Rev 2 H1 ROM
342-0093-A LaserWriter Plus ROM LaserWriter Plus Printer 512K Rev 2 L2 ROM
342-0094-A LaserWriter Plus ROM LaserWriter Plus Printer 512K Rev 2 H2 ROM
342-0095-A LaserWriter Plus ROM LaserWriter Plus Printer 512K Rev 2 L3 ROM
342-0096-A LaserWriter Plus ROM LaserWriter Plus Printer 512K Rev 2 H3 ROM
342-0097-A LaserWriter Plus ROM LaserWriter Plus Printer 512K Rev 2 L4 ROM
342-0098-A LaserWriter Plus ROM LaserWriter Plus Printer 512K Rev 2 H4 ROM
342-0099-A LaserWriter Plus ROM LaserWriter Plus Printer 512K Rev 2 L5 ROM
342-0100-A LaserWriter Plus ROM LaserWriter Plus Printer 512K Rev 2 H5 ROM
342-0101-A LaserWriter Plus ROM LaserWriter Plus Printer 512K Rev 2 L6 ROM
342-0102-A LaserWriter Plus ROM LaserWriter Plus Printer 512K Rev 2 H6 ROM
342-0103-A LaserWriter Plus ROM LaserWriter Plus Printer 512K Rev 2 L7 ROM
342-0104-A LaserWriter Plus ROM LaserWriter Plus Printer 512K Rev 2 H7 ROM
341-0112-A AppleBus Card ROM 8k*8 Apple SCSI (non-HS) Revision A Firmware
341-0112-B AppleBus Card ROM 8k*8 Apple SCSI (non-HS) Revision B Firmware
342-0120 NuBus Card ROM 4k*8 PC Drive Card (630-4161, 820-0213-A)
341-0124-A IIgs i8048 IIgs Keyboard
341-0127-A AppleBus Card PROM 256*8 (TBP28L22N or 6309) 16 Sector Drive Controller P5A ROM (firmware)
341-0128-A AppleBus Card PROM 256*8 (TBP28L22N or 6309) 16 Sector Drive Controller P6A ROM
341-0132-A 342-0132-A IIc, IIe ROM 2kb*8 Keyboard USA w/Dvorak
341-0132-B 342-0132-B IIc, IIe ROM 2kb*8 Keyboard USA w/Dvorak
341-0132-C 342-0132-C IIc, IIe ROM 2kb*8 Keyboard USA w/Dvorak
342-0132-D IIc, IIe ROM 2kb*8 Keyboard USA w/Dvorak
342-0133-A IIc, IIe ROM 4kb*8 Video US-NTSC (Character Generator)
342-0134-A IIc, IIe ROM 8kb*8 EF ROM
342-0135-A IIc, IIe ROM 8kb*8 CD ROM
342-0135-B IIc, IIe ROM 8kb*8 CD ROM
341-0138-D Lisa 1 ROM 4kb*8 Disk ROM
341-0138-E Lisa 1 ROM 4kb*8 Disk ROM
341-0138-F Lisa 1 ROM 4kb*8 Disk ROM
341-0145 III ROM 2kb*8 Video scan decode ROM interlace upgrade
341-0150-A IIc, IIe ROM 2kb*8 Keyboard ROM UK/USA
341-0151-A IIc, IIe ROM 2kb*8 Keyboard ROM Germany/USA Rev.A
341-0154 IIc, IIe ROM 2kb*8 Keyboard ROM Italy/USA
341-0160-A IIc, IIe ROM 2kb*8 Video ROM UK/USA
341-0161-A IIc, IIe ROM 2kb*8 Video ROM Germany/USA Rev.A
341-0164 IIc, IIe ROM 2kb*8 Video ROM Italy/USA
341-0170-A 342-0170-A IIc, IIe HAL/PAL 16R8 TMG DRAM/NTSC Video Timing Generator
342-0176B IIe P.A.L. HAL/PAL 16R8 TMG DRAM/PAL Video Timing Generator
341-0171-A ProFile 5MB Z8610 RW Z8 ROM version 3.98
342-0172-A Lisa 2/5 PROM 256*8 16 Sector drive controller P6A ROM, same as 34x-0028
341-0175-B Lisa ROM 8kb*8 Boot ROM Hi (old)
341-0175-C Lisa ROM 8kb*8 Boot ROM Hi (old)
341-0175-D Lisa ROM 8kb*8 Boot ROM Hi (old)
341-0175-F Lisa ROM 8kb*8 Boot ROM Hi (old)
341-0175-H Lisa ROM 8kb*8 Boot ROM Hi
341-0176-B Lisa ROM 8kb*8 Boot ROM Lo (old)
341-0176-C Lisa ROM 8kb*8 Boot ROM Lo (old)
341-0176-D Lisa ROM 8kb*8 Boot ROM Lo (old)
341-0176-F Lisa 2 ROM 8kb*8 Boot ROM Lo (old)
341-0176-H Lisa ROM 8kb*8 Boot ROM Lo
341-0181 ? EPROM 2kb*8 ?
341-0182 ? EPROM 2kb*8 ?
341-0193-A Lisa ROM 2kb*8 Parallel Interface Card
342-0220-A Mac 128 ROM 32kb*8 Hi
342-0220-B Mac 128 ROM 32kb*8 Hi
342-0221-A Mac 128 ROM 32kb*8 Lo
342-0221-B Mac 128 ROM 32kb*8 Lo
341-0229-A Lisa PROM 256*8 Video PROM
342-0243-A IIc PAL 20X4 or GAL 20XV10 GLU
341-0246 NuBus Card ROM Apple EtherNet NB (A/ROSE)
342-0250-A Mac 512 PAL 16L8 BMU1
342-0251-A Mac 512 PAL 16R8 LAG
342-0252-A Mac 512 PAL 16R6 TSG
342-0253-A Mac 512 PAL 16R8 ASG
342-0254-A Mac 512 PAL 16R4 TSM
342-0255-A Mac 512 PAL 16R4 BMU0
341-0260-A Z8601 Widget-10 Servo Z8
341-0265-A 342-0265-A IIc, IIe ROM 4kb*8 Character Generator USA (Enhanced)
341-0266 NuBus Card ROM Macintosh Display Card 8•24GC
342-0268 AppleBus Card PAL 16R4 Mouse Card
341-0269 AppleBus Card CPU 68HC05 Mouse Card, see also 341-0285/342-0285
342-0270-C AppleBus Card ROM Mouse Card, Firmware
341-0271-A AppleBus Card ROM 2kb*8 ProFile Controller: Firmware 5MB
342-0272-A IIc ROM 16kb*8 Monitor ROM FF
342-0273-A IIc, IIe ROM 2kb*8 Video ROM UK
342-0274-A IIc, IIe ROM 2kb*8 Video ROM French
342-0275-A IIc, IIe ROM 2kb*8 Video ROM DE
342-0276-A IIc, IIe ROM 2kb*8 Video ROM Italian
341-0281-D Lisa ROM 4kb*8 2/10 Disk ROM
342-0284-A IIc, IIe ROM 2kb*8 (enhanced) Keyboard ROM IT/USA
341-0285 AppleBus Card CPU 68HC05 Mouse Card, see also 341-0269
342-0285 AppleBus Card CPU 68HC05 Mouse Card, see also 341-0269
341-0286-A ProFile 10MB ROM 4kb*8, Z8611 RW ROM
341-0287 ProFile 10MB
341-0288-A Widget-10 Controller (677-0108) Z8 Piggyback
341-0289-A Widget-10 Controller Z8 Piggyback 8k*8 Widget-10 Controller 1A42
341-0289-B Widget-10 Controller Z8 Piggyback 8k*8 Widget-10 Controller 1A43
341-0289-C Widget-10 Controller Z8 Piggyback 8k*8 Widget-10 Controller 1A44
341-0289-D Widget-10 Controller Z8 Piggyback 8k*8 Widget-10 Controller 1A45
341-0290-B Lisa ROM 2kb*8 2/5 Disk ROM
342-0297-H0 ? Printer H0 ROM
341-0299-A AppleBus Card ROM 2kb*8 ProFile Controller: Firmware 10MB
341-0299-B AppleBus Card ROM 2kb*8 ProFile Controller: Firmware 10MB
342-0303-A IIe ROM 8kb*8 (Enhanced) EF ROM
342-0304-A IIe ROM 8kb*8 (Enhanced) CD ROM
342-0306-A IIc, IIe ROM 2kb*8 Keyboard ROM French
342-0307-A IIc, IIe ROM 2kb*8 Keyboard ROM Spanish
342-0309-H1 ? Printer H1 ROM
342-0310-H2 ? Printer H2 ROM
342-0311-H3 ? Printer H3 ROM
342-0312-H4 ? Printer H4 ROM
342-0313-H5 ? Printer H5 ROM
342-0314-H6 ? Printer H6 ROM
342-0315-H7 ? Printer H7 ROM
342-0316-L0 ? Printer L0 ROM
342-0317-L1 ? Printer L1 ROM
342-0318-L2 ? Printer L2 ROM
342-0319-L3 ? Printer L3 ROM
342-0320-L4 ? Printer L4 ROM
342-0321-L5 ? Printer L5 ROM
342-0322-L6 ? Printer L6 ROM
342-0323-L7 ? Printer L7 ROM
342-0327-A IIe ROM 2kb*8 (enhanced) Keyboard ROM deutsch/usa
342-0329 IIe ROM 2kb*8 (enhanced) Keyboard ROM Italy/USA
342-0341-A Mac Plus ROM 64kb*8 Hi V1
342-0341-B Mac Plus ROM 64kb*8 Hi V2
342-0341-C Mac Plus ROM 64kb*8 Hi V3
342-0342-A Mac Plus ROM 64kb*8 Lo V1/V2
342-0342-B Mac Plus ROM 64kb*8 Lo V3
342-0343-A HD20 ROM 8kb*8 v3271
342-0343-B HD20 ROM 8kb*8 v3271
341-0344-A AppleBus Card ROM 4kb*8 Apple II Memory Expansion aka Slinky
341-0346-A Mac XL ROM 8kb*8 Boot ROM Lo
341-0347-A Mac XL ROM 8kb*8 Boot ROM Hi
341-0348-A Mac XL PROM 256*8 Video PROM
342-0349-A IIe (Platinum) ROM 16kb*8 CF ROM
342-0349-B IIe (Platinum) ROM 16kb*8 CF ROM
342-0352-A Mac SE ROM 128kb*8 High
342-0353-A Mac SE ROM 128kb*8 Low
342-0359-A LaserWriter ROM LaserWriter Printer 1M Rev 47 L0 ROM
342-0360-A LaserWriter ROM LaserWriter Printer 1M Rev 47 H0 ROM
342-0361-A LaserWriter ROM LaserWriter Printer 1M Rev 47 L1 ROM
342-0362-A LaserWriter ROM LaserWriter Printer 1M Rev 47 H1 ROM
342-0363-A LaserWriter Plus ROM LaserWriter Plus Printer 1M Rev 47 L0 ROM
342-0364-A LaserWriter Plus ROM LaserWriter Plus Printer 1M Rev 47 H0 ROM
342-0365-A LaserWriter Plus ROM LaserWriter Plus Printer 1M Rev 47 L1 ROM
342-0366-A LaserWriter Plus ROM LaserWriter Plus Printer 1M Rev 47 H1 ROM
342-0367-A LaserWriter Plus ROM LaserWriter Plus Printer 1M Rev 47 L2 ROM
342-0368-A LaserWriter Plus ROM LaserWriter Plus Printer 1M Rev 47 H2 ROM
342-0369-A LaserWriter Plus ROM LaserWriter Plus Printer 1M Rev 47 L3 ROM
342-0370-A LaserWriter Plus ROM LaserWriter Plus Printer 1M Rev 47 H3 ROM
342-0371-A LaserWriter Plus ROM LaserWriter Plus Printer 512k Rev 47 L0 ROM
342-0372-A LaserWriter Plus ROM LaserWriter Plus Printer 512k Rev 47 H0 ROM
342-0373-A LaserWriter Plus ROM LaserWriter Plus Printer 512k Rev 47 L1 ROM
342-0374-A LaserWriter Plus ROM LaserWriter Plus Printer 512k Rev 47 H1 ROM
342-0375-A LaserWriter Plus ROM LaserWriter Plus Printer 512k Rev 47 L2 ROM
342-0376-A LaserWriter Plus ROM LaserWriter Plus Printer 512k Rev 47 H2 ROM
342-0377-A LaserWriter Plus ROM LaserWriter Plus Printer 512k Rev 47 L3 ROM
342-0378-A LaserWriter Plus ROM LaserWriter Plus Printer 512k Rev 47 H3 ROM
342-0379-A LaserWriter Plus ROM LaserWriter Plus Printer 512k Rev 47 L4 ROM
342-0380-A LaserWriter Plus ROM LaserWriter Plus Printer 512k Rev 47 H4 ROM
342-0381-A LaserWriter Plus ROM LaserWriter Plus Printer 512k Rev 47 L5 ROM
342-0382-A LaserWriter Plus ROM LaserWriter Plus Printer 512k Rev 47 H5 ROM
342-0383-A LaserWriter Plus ROM LaserWriter Plus Printer 512k Rev 47 L6 ROM
342-0384-A LaserWriter Plus ROM LaserWriter Plus Printer 512k Rev 47 H6 ROM
342-0385-A LaserWriter Plus ROM LaserWriter Plus Printer 512k Rev 47 L7 ROM
342-0386-A LaserWriter Plus ROM LaserWriter Plus Printer 512k Rev 47 H7 ROM
341-0392 Mac LC ROM 128kb*8 (c) Apple 1983-1990
341-0393 Mac LC ROM 128kb*8 (c) Apple 1983-1990
341-0394 Mac LC ROM 128kb*8 (c) Apple 1983-1990
341-0395 Mac LC ROM 128kb*8 (c) Apple 1983-1990
341-0414-A HD20 PAL 16R6A
341-0415 AppleBus Card PAL 16L8 SCSI Controller Card: <unknown>
341-0416 AppleBus Card PAL 16L8 SCSI Controller Card: <unknown>
341-0437-A AppleBus Card ROM 8kb*8 SCSI (non-HS) Revision C Firmware
341-0438-A AppleBus ROM 32kb*8 3.5" Disk Controller
341-0445-A 342-0445-A IIc ROM 32kbx8 Monitor ROM $03(?)
341-0445-B IIc ROM 32kbx8 Monitor ROM $04
342-0545-A ? Printer L0 ROM
342-0546-A ? Printer H0 ROM
342-0547-A ? Printer L1 ROM
342-0548-A ? Printer H1 ROM
342-0549-A ? Printer L2 ROM
342-0550-A ? Printer H2 ROM
342-0551-A ? Printer L3 ROM
342-0552-A ? Printer H3 ROM
342-0568-A LaserWriter ROM LaserWriter Printer 512k Rev 47 L0 ROM
342-0569-A LaserWriter ROM LaserWriter Printer 512k Rev 47 H0 ROM
342-0570-A LaserWriter ROM LaserWriter Printer 512k Rev 47 L1 ROM
342-0571-A LaserWriter ROM LaserWriter Printer 512k Rev 47 H1 ROM
342-0572-A LaserWriter ROM LaserWriter Printer 512k Rev 47 L2 ROM
342-0573-A LaserWriter ROM LaserWriter Printer 512k Rev 47 H2 ROM
342-0574-A LaserWriter ROM LaserWriter Printer 512k Rev 47 L3 ROM
342-0575-A LaserWriter ROM LaserWriter Printer 512k Rev 47 H3 ROM
341-0625-A IIc+ ROM 32kb*8 Monitor ROM $05
341-0650-01 Mac SE/30 ROM Video ROM
341-0660 NuBus Card ROM 8kb*8 Hi Res Display (Toby Frame Buffer)
341-0661 ? 40pol DIP seen on Ebay together with 341-0662
341-0662 ? 40pol DIP seen on Ebay together with 341-0661
341-0668-A NuBus Card ROM ? *8 Nubus Monochrom Video Card 820-0285-A 630-4385-
341-0722 NuBus Card ROM NuBus Serial A (A/ROSE)
341-0723 NuBus Card ROM NuBus Serial C (A/ROSE)
341-0728 IIgs ROM 128kb*8 or 256kb*8 ROM 3 FC-FD (prototype)
341-0729 IIgs ROM 128kb*8 or 256kb*8 ROM 3 FE-FF (prototype)
341-0737 IIgs ROM 128kb*8 or 256kb*8 ROM 3 FC-FD
341-0748 IIgs ROM 128kb*8 or 256kb*8 ROM 3 FE-FF
341-0749 IIgs ROM 128kb*8 or 256kb*8 ROM 3 FE-FF (prototype)
341-0801[-02] NuBus Card ROM 16kb*8 Macintosh Display Card 670- (630-0400, 820-0600-A), (4*8, 8*24) ROM v1.0.1
341-0803 AppleBus Card ROM 32k*8 Apple II HighSpeed SCSI Card
341-0860 Printer ROM LL
341-0861 Printer ROM LM
341-0862 Printer ROM UM
341-0863 Printer ROM UU
341-0868 NuBus Card ROM 32kb*8 Macintosh Display Card 670- (630-0400, 820-0600-A), (4*8, 8*24) ROM v1.2
341-0873 NuBus Card ROM 64kb*16 TokenRing 4/16 NB Card (A/ROSE)
341-8003-A Mac XL ROM 4kb*8 Sun Mac XL Disk ROM for 800k drives (from 2/5)
341-8003-B Mac XL ROM 4kb*8 Sun Mac XL Disk ROM for 800k drives (from Sun XL)
341-8003-C Mac XL ROM 4kb*8 Sun Mac XL Disk ROM for 800k drives (from Goodwill XL)
341-8007 ROM 2kb*8 Sun SCSI Card
343S0041 IIgs IWM - Integrated Woz Machine FDC
341S0345 IIgs M50740 6502 based MPU ADB Keyboard Controller
342S0639-A SE/30 ROM-SIMM 4* 64kb*8 Firmware
342S0640-A SE/30 ROM-SIMM 4* 64kb*8 Firmware
342S0641-A SE/30 ROM-SIMM 4* 64kb*8 Firmware
342S0642-A SE/30 ROM-SIMM 4* 64kb*8 Firmware
341S1055-A AppleBus Card GAL 16V8 3.5" Disk Controller <unknown>
341S1056-A AppleBus Card GAL 16V8 3.5" Disk Controller <unknown>
341S1057-A AppleBus Card GAL 16V8 3.5" Disk Controller <unknown>
341S1058-A AppleBus Card GAL 16V8 3.5" Disk Controller <unknown>
343S0061-A AppleBus Card 3.5" Disk Controller: SWIM - Super Integrated Woz Machine FDC
343-0051 IIgs DOC5503 - Ensoniq Digital Oscillator (Sound)
343S6502-A AppleBus Card VLSI 6502 CPU 3.5" Disk Controller: CPU
344-0010 IIe ASIC MMU
344-0010-B IIe ASIC MMU
344-0011 IIc ASIC MMU
344-0011-B IIc ASIC MMU
344-0020-A IIe ASIC IOU 50Hz?
344-0020-B IIe ASIC IOU 60Hz?
344-0021-B IIe ASIC IOU International 50Hz/60Hz
344-0022-A IIc, IIe ASIC IOU 50Hz
344-0023-A IIc ASIC IOU 50Hz
344-0040 IIgs RTC - Real Time Clock
344-0041-B Mac 512 IWM
344-0042-B Mac 512 RTC
344S0046-C IIgs VGC - Video Graphics Controller
344S0047 IIgs MEGA II - Integrated Apple II Core Logic Controller
344S0048 IIgs ABD GLU - Legacy Keyboard/ADB Multiplexer General Logic Unit
344S0049 IIgs SLOTMAKER - Apple II Slot control, multiplexing, timing and buffering
344S0050 IIgs FPI - Fast Processor Interface
344S0052 IIgs SGLU - Sound General Logic Unit
344S0066 IIgs CYA - <Unknown>
820-0418-A NuBus Card ROM 64kb*16 TokenRing

Notes:

  • Use of "-00", "-DO", etc. suffixes (or lack of suffix) seems to vary randomly and is inconsistent. For instance, an E8 ROM might be numbered 341-0014 or 341-0014-00 and have "E8" stamped elsewhere on the ROM. In most cases, this also seems to apply to "-A", "-B" suffixes (or having no suffix). It has been suspect that "-A", "-B" suffixes could be used to denote IC runs or production batches.
  • There is some evidence that the prefix "341" vs "342" may denote manufacture or locations, or first and second source suppliers. Perhaps it could also denote NMOS vs CMOS die fabrication.
  • 341/342 are always ROMs, and 344 are always custom ASICs. However 343S0061-A is a custom ASIC and does not follow this pattern. So perhaps like with the ROMs, the prefix denotes first and second source suppliers or fabrication process.
  • Most newer ICs use a 'S' designation in the middle of their part number where older ICs used a '-' mark. This is most likely to designate CMOS die fabrication but has yet to be confirmed.

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