Apple Computer Custom IC Definitions
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- Antelope. The Antelope IC is a custom IC containing the video CLUT (color look-up table) and DAC. The Antelope IC is pin and software compatible with the AC/DC custom IC used in the Macintosh Quadra 700 and 950, but does not support 24 bits per pixel or Apple convolution.
- Ariel II. The Ariel II video chip provides a color lookup table (CLUT) and digital-to-analog converter (DAC) for driving an AudioVision monitor.
- ATECS. The Apple Telecom External Clock Synchronizer (ATECS) is a control chip that can synchronize the DSP and sound subsystems to an external clock signal received through the Apple GeoPort serial port connector.
- AWACS. The audio waveform amplifier and converter (AWACS) is a custom IC that combines a waveform amplifier with a 16-bit digital sound encoder and decoder (codec).
- Baboon. The Baboon custom IC provides the interface to the IDE hard disk drive.
- Bandit. The Bandit IC provides buffering and address translation between the processor bus and the PCI bus. The Bandit IC supports burst transfers, in both directions, of up to 32 bytes in length—the size of a cache block.
- BART. The BART NuBus controller chip provides the data gateway between NuBus and the CPU bus. It acts as a CPU bus master, transferring one-cycle or four-cycle transactions.
- Burgundy. The Burgundy custom IC combines a waveform amplifier with an internal 18-bit digital sound codec (only 16 bits supported for analog to digital/digital to analog sound capture and playback).
- Capella. The Capella custom IC provides the bus translation logic that bridges the 603e processor and the 68040-based custom ICs. It translates the 64-bit data from the 603e data bus into 32-bit data required by the 68040 bus and provides the necessary signals to maintain 68040 protocol.
- Chaos, a custom IC that provides data bus buffering between the video subsystem and the processor bus
- CIVIC. The Cyclone Integrated Video Interfaces Controller (CIVIC), used in the AV card, is a CMOS chip in a 144-pin package.
- CLUT/DAC (color look-up table and digital-to-analog converter) IC developed by Apple and used in the Macintosh Display Card4•8, 8•24, and 8•24GC
- Control, a custom IC that provides addressing and control for the video subsystem
- CSC. The CSC (color support chip) IC provides the data and control interface to the LCD panel. The CSC IC is also used in the Macintosh PowerBook 500 and 280 series computers. The CSC IC contains a 256-entry CLUT, RAMDAC, display buffer controller, and flat panel control circuitry.
- Cuda. The Cuda IC is a custom version of the Motorola MC68HC05 microcontroller. It includes ADB, the programming interface for the DFAC II IC, real-time clock.
- CudaLite. The CudaLite IC is a custom version of the Motorola MC68HC05 microcontroller. It provides several system functions, including ADB and PS2.
- Curio. The Curio is a multipurpose I/O chip that contains a Media Access Controller for Ethernet (MACE), a SCSI controller, and a Serial Communications Controller (SCC).
- DAFB (Direct Access Frame Buffer), an IC that connects directly to the system bus and controls the video RAM (frame buffer)
- DFAC (Digitally Filtered Audio Chip), the sound input and filter IC first used in the Macintosh LC
- DFAC II. The DFAC II custom IC contains the sound input processing devices. The DFAC II IC does not include the sound control logic and the input and output buffers; those are part of the PrimeTime IC.
- EAGLE. The EAGLE gate array is a new custom chip that implements many functions that were provided by individual chips in earlier Macintosh computers. These functions include timing, video generation, memory mapping, sound, clock generation, and miscellaneous GLU (general logic unit) functions.
- Endeavor. The Endeavor is a programmable video clock chip used in the Macintosh Quadra 840AV; the equivalent in the Macintosh Centris 660AV is called Clifton Plus.
- Enhanced ASC (Apple Sound Chip), a custom IC that replaces the Apple Sound Chip
- F108. The F108 IC performs the system memory control functions. It also includes circuitry equivalent to the SCC and SCSI controller ICs.
- Grackle. The Grackle IC functions as the bridge between the PowerPC microprocessor bus and the I/O and graphics devices on the PCI bus. It provides buffering and address translation from one bus to the other.
- Grand Central. The Grand Central custom IC provides an interface between the standard Macintosh I/O devices and the PCI bus. A DMA controller in the Grand Central IC supports DMA I/O transfers through that IC’s internal I/O devices and through the Curio IC.
- Hammerhead. A custom IC called Hammerhead controls the memory subsystem. The components of the Hammerhead IC are the system bus controller, the DRAM controller, the ROM controller, the second-level (L2) cache controller.
- Heathrow. The Heathrow IC is an I/O controller and DMA engine for Power Macintosh computers using the PCI bus architecture.
- IOSB. The IOSB includes I/O data bus buffers, a SWIM2 floppy disk controller, VIA1 and VIA2. The IOSB IC provides the data bus services of the MC68030 that the MC68040 does not provide.
- JDB (Junction Data Bus), one of two ICs making up the I/O Adapter, connecting the data signals from the system bus and the I/O bus
- KeyLargo. The I/O controller IC in the PowerBook computer is a custom IC called KeyLargo. It provides the interface and control signals for the following devices: hard drive, USB, modem, etc.
- Kiwi. The Kiwi IC is a very large-scale IC that incorporates the functions of the YANCC IC used in the Macintosh Quadra 700 and 950 computers along with the bus transceivers and several driver ICs. The Kiwi IC provides an interface to the MC68040 on one side and a NuBus interface on the other side.
- MCU (Memory Control Unit), a custom IC that connects to the system bus and controls regular and burst-mode data transfers to and from the main RAM and ROM
- MEMC. The MEMC provides the control and timing signals for the ROM, RAM, and VRAM. It also includes the logic that controls the system bus arbitrations and the frame buffer controller that provides the video timing and control signals.
- MEMCjr. The MEMCjr IC combines functions performed by several ICs in previous Macintosh designs. Control and timing signals for the ROM, RAM, and VRAM, a frame buffer controller for the video display.
- MESH. The MESH IC is a custom IC that controls the SCSI bus to the internal SCSI devices. Because this bus does not have to drive a long external bus, it can operate at higher transfer rates than the external SCSI bus.
- Mickey. The Mickey is a composite video encoder in a 28-pin advanced bipolar CMOS chip. It is used in the AV card.
- New Age. The New Age is a floppy disk controller in a 64-pin CMOS chip.
- O’Hare. The O’Hare IC is based on the Grand Central IC present in the Power Macintosh 7500 computer. It is an I/O controller and DMA engine for Power Macintosh computers using the PCI bus architecture
- Paddington. The I/O controller IC in the Macintosh iMac computer is an ASIC called Paddington. The Paddington IC is an integrated I/O controller and DMA engine for use in Power Macintosh computers with a PCI bus.
- Power Manager. The Power Manager IC is a 68HC05 microprocessor that operates with its own RAM and ROM.
- PrimeTime. The PrimeTime IC combines functions performed by several ICs in previous Macintosh designs. Data bus buffers for the internal I/O bus, SWIM II, interface adapters VIA1 and VIA2.
- PrimeTime II. The PrimeTime II IC supports the I/O bus. It combines functions performed by several ICs in previous Macintosh designs.
- PrimeTime III. The PrimeTime III IC supports the I/O bus and functions as the bridge between the 68040 bus and the I/O bus. It combines functions performed by several ICs in previous Macintosh designs (VIA1, VIA2, SWIM II).
- PSX. The PSX IC functions as the bridge between the PowerPC 603e microprocessor and the PCI bus. It provides buffering and address translation from one bus to the other.
- PSX+. The PSX+ IC functions as the bridge between the PowerPC 603e microprocessor and the PCI bus. It provides buffering and address translation from one bus to the other. The PSX+ IC also provides the control and timing signals for system cache, ROM, and RAM.
- RaDACal, a high-performance digital-to-analog converter (DAC) used for the video stream to the monitor
- Relayer, one of two ICs making up the I/O Adapter, controlling the bus buffers and providing bus arbitration logic
- Screamer. The Screamer custom IC combines a waveform amplifier with a 16-bit digital sound encoder and decoder (codec). The Screamer IC provides improved audio performance over the AWACS IC used in previous Macintosh computers.
- Sebastian. The Sebastian chip is a video color palette and video digital-to-analog converter (DAC) in a 100-pin CMOS configuration, used in the AV card.
- Singer. The Singer is an I/O chip that constitutes a 16-bit digital sound codec. It conforms to the IT&T ASCO 2300 Audio-Stereo Codec Specification.
- Sixty6, an RGB-to-YUV converter and convolver for the second video output stream (on the Power Macintosh 8500 computer only)
- Sonora is a new custom chip that integrates the functions of the V8 and SWIM chips used in the Macintosh LC II. These functions include timing, memory mapping, video and sound control, miscellaneous GLU (General Logic Unit) functions, and floppy disk control.
- Spice. A custom IC called Spice combines several functions performed by individual ICs in older machines: memory mapping, VIA1/VIA2 registers, SWIM2.
- Sporty, a custom IC that provides sound output amplification functions
- Squidlet is a 28-pin chip that provides a set of synchronized system clocks for Power Macintosh computers.
- SWIM (Super Woz Integrated Machine), the IC that supports the SuperDrive high-density floppy disk drive
- Uni-N. The Uni-N memory controller and bus bridge IC provides cost and performance benefits by combining several functions into a single IC. It contains the memory controller, the PCI bus bridge, the Ethernet and FireWire interfaces, and the AGP port.
- Valkyrie. The Valkyrie IC is a custom IC containing the logic for the video display. It includes the following functions: display memory controller, video CLUT (color lookup table), video DAC (digital-to-analog converter).
- Valkyrie-AR. The Valkyrie-AR IC is a custom IC containing the logic for the video display.
- Video Display Interface. The Video Display Interface chip is a custom IC designed to keep the Macintosh Portable 68HC000 CPU from having to refresh the screen (LCD display), thereby allowing the CPU to do more useful work.
- Whitney. The Whitney IC is a custom IC that provides the interface between the system bus and the I/O bus that supports peripheral device controllers.
- YANCC (Yet Another NuBus Controller Chip), a custom IC that controls the NuBus interface
Part number Name Notes 337-0001 MC68000P8 (DIP) Custom marked 337S0006 ATI 264GT 337S0078 'Control 1'? TI-Manufactured, IIvx 338-6523 or 338S6523 VIA Custom marked 338S6525 VIA Mac Portable, PB140/170 338S6526 65C22 VIA @ UC2, IIsi 3400257 NCR 53C80 Custom marked 341-0250-A BMU1 PAL16L8, Mac512k 341-0251-A LAG PAL16R8?, Mac512k 341-0252-A TSG PAL16R6, Mac512k 341-0253-A ASG PAL16R8, Mac512k; implements a 6-bit PWM counter for floppy drive speed and audio 341-0254-A TSM PAL16R4, Mac512k 341-0255-A BMU0 PAL16R4, Mac512k 341-0514-A BMU1 PAL16L8, Plus 341-0515-A LAG PAL16R8, Plus 341-0516-A TSG PAL16R6, Plus 341-0517-A ASG PAL16R8, Plus; implements a 6-bit PWM counter for audio 341-0519-A CAS PAL20L8, Plus 341-0520-A BMU2 PAL20R4, Plus 341-0522-A TSM VP16RP8MPC(PAL16R4), Plus 341-0538-A GLU PAL16L8, Mac SE 341-0633-A PAL16R8B @ UG7, SE/30; Clock generator for Video state machine 341-0635-A PAL16R8B @ UG6, SE/30; Beginning of Video state machine 341-0637-A PAL16L8B @ UE6, SE/30; End of Video state machine 341-0665-A PAL16R4B @ UI6, SE/30; Controls HSync and IRQ? in regards to CPU? 341S0689-C PAL16L8D @ UH7, SE/30; Controls RAM read/write signals in regards to CPU? 341-0688-A PAL16R8B @ UE7, SE/30; Middle of Video state machine 341-0746-A PAL16R8B? @ UG7, replaces 341-0633-A, SE/30; Clock generator for Video state machine 341-0747-A PAL16R8B? @ UG6, replaces 341-0635-A, SE/30; Beginning of Video state machine 341-0754-A PAL16L8B? @ UE6, replaces 341-0637-A, SE/30; End of Video state machine 341-0755-A PAL16R8B? @ UE7, replaces 341-0688-A, SE/30; Middle of Video state machine 341-0815-A PAL16R4, IIsi 341-0816-A PALC22V10, IIsi 341-0817-A PALC22V10, IIsi 341S0025 PMU 341S0060 Cuda (v2.40) Performa/Quadra 6xx, some PMac x200, PMac x400, some PMac x500, Pippin, Gossamer G3 341S0187 PMU PB190 341S0187-B PMU PB1400 341S0262 Cuda v3.0 some PMac x500, Bondi Blue iMac 341S0285 Cuda Lite ADB and PS/2 support - PMac 4400 & clones 341S0417 Cuda Color Classic 341S0489 'DECODE' Rom address decoder, IIvx 341S0720 CAS PAL(PAL16R8?) Classic 341S0788 Cuda (v2.37) PRAM, RTC, ADB 341S0490 ? PAL?, IIvx 341S0815-A PAL16R4 @ UJ10, IIsi 341S0816-A PALC22V10 @ UJ8, IIsi 341S0817-A PALC22V10 @ UE9, IIsi 341S0850 Egret (v1.01, earlier) PRAM, RTC, ADB; IIsi and LC 341S0851 Egret (v1.01) PRAM, RTC, ADB 341S0853 Caboose (v1.00) Handles switches on case 341S0856-A ? AMD-Manufactured, Quadra 700 341S0879-B 'Control 2'? AMD-Manufactured, IIvx 341S0934 PMU PB5x0 342S0440 or 342-0440-A or 342S0440-B â€œBit-bangâ€ ADB MCU; Manufactured by Microchip, early PIC as acquired from GI SE-FD/HD,II,IIx,IIcx,IIci,SE-30,Quadra 700 342S0740-2 KYBD Mac Portable; probably Mitsubishi M50740 342S0743-1 ? PB140/170 342S0753-A PMGR Mac Portable; Mitsubishi M50753 342S0854-2 PMU Power Management Unit 3430045B â€œSony Sound Chipâ€ PWM audio DAC 343-0071 U1M HYBRID Hybrid IC carrier, Mac Portable 343-0155-A ?(V8?) LCII 343-1086 GSC Gray Scale video Controller (actually a Chips & Technologies part) 343-1087 CPUGLU 343-1090 MISCGLU 343S0014 Orbit 343S0018-01 ? PM7500/100 343S0042 RTC 343S0045-B SOUND Performa 200, Mac Portable, probably PWM audio DAC 343S0060-A VASP Memory & I/O controller w/audio, video 343S0061(-A) SWIM floppy controller 343S0065 PSX+ 343S0103 Quadra 700 343S0105 RELAYER Quadra 700 343S0106 JDB Quadra 700 343S0107 BBU 343S0116-A V8 343S0124-01 PMU Duo 210/230/250 343S0129 DFAC II 343S0132 Spice 343S0135 Primetime 343S0137 SWIM III 343S0140 AWACS Audio DAC 343S0147 Barney also called â€œTREXâ€ 343S0148-01 FAT AMIC WGS 343S0161 ?Clock generator? Quadra 605 343S0164-A MEMCjr Memory controller 343S0172 O'Hare I/O controller 343S0173(-B) O'Hare PB2400/3400 343S0180 Whitney 3 343S0704 Sebastian Video RAMDAC 343S0788 Cuda PMac x100? (may be 341S0788 typo) 343S0801 AMIC 343S0802 HMC 343S0802-A HMC WGS 343S1018(A) MDU Memory Decode Unit (IIci/IIsi) 343S1019(A) RBV RAM-Based Video (IIci/IIsi) 343S1020(-A) NuChip30 NuBus bridge 343S1027 Bus Transceiver comes in a pair of 2; IIsi, IIvx, Q700 343S1029(-A) ? PB140/170 343S1036(-A) Enhanced Apple Sound Chip (EASC) 343S1039 MUNI 343S1047 DDC 343S1048-1 ? PB140/170 343S1049 ? PB140/170 343S1054-A Eagle Memory & I/O controller w/audio, video 343S1055 MSC 343S1065 Sonora Memory & I/O controller w/audio, video 343S1069(-A) Ariel Video RAMDAC 343S1074 Ariel IIvx 343S1077 djMEMC 343S1078 IOSB 343S1091 Antelope Video RAMDAC 343S1095(-A) Nubus 343S1096 Civic Framebuffer controller 343S1097 YMCA or MCA Memory controller 343S1100 PSC I/O controller 343S1103(-A) Civic Framebuffer controller 343S1105 Whitney I/O controller 343S1113 Pratt Memory controller 343S1118 MSC Memory controller 343S1123 Keystone 343S1124 BART NuBus controller 343S1125 Grand Central I/O controller 343S1126 Bandit 343S1129(-A) PSC I/O controller 343S1133 Valkyrie 343S1136 F108 343S1138-04 PLAN-B pm7500/100 343S1144 Data Path 343S1148 PBX 343S1154 Control 343S1155 Chaos 343S1159 Baboon 343S1161 DATA PATH WGS 343S1164 BART WGS 343S1166 Dacula Video RAMDAC 343S1181 Capella Converts 040 bus for PPC603 343S1183 PSX 343S1184 Platinum 343S1185 Iridium 343S1189 PrimeTime II 343S1190 Hammerhead 343S1191(-A) Athens Prime Clock/timing controller 343S1201 Heathrow 343S1202(-2) PSX+ 343S1206 Valkyrie AV2 343S6502 65C02 Apple IIe Card 344-0040 RTC Apple IIgs (less pram than the 'Mac RTC', 344-0042?) 344-0041(-A/B) IWM 344S0041 IWM Apple IIe Card 344S0042(A/B) RTC 344-0043-A IWM (SWIM Pinout version) IIgs and Mac SE 344S0061-A SWIM 344S0063-1 ASC Apple Sound Chip 344S0063-A ASC Apple Sound Chip, IIsi 344S0076 OSS Operating System Support (IRQ controller), IIfx 344S0100-01 Egret (v1.00) IIsi 343S0104-A YANCO Quadra 700 344S0111(-01/-A) GEMINI Apple IIe Card 344S0112-02 DAFB Quadra 700 344S0602 GLU 344S0602-A GLUE CHIP SE/30 344S0603-A BBU Mac SE 344S0608-02 CPU GLU Mac Portable 344S0609-01 VIDEO Mac Portable 344S0610-1 MISC GLU Mac Portable 344S1018-03 MDU @ UI4, IIsi 344S1019-01 RBV @ UA3, IIsi 344S1029 SWIM Mac Portable 344S1033-B DFAC Digitally Filtered Audio Chip 357S0010-A RAMDAC Bt ?model? RAMDAC 377S6553 Beruit 377S7014 CSC Chips & Technologies 65225 377S9624 CSC Chips & Technologies 65220 65210 N/A Chips & Technologies video controller 68HC05 N/A Egret/Cuda/Caboose on desktops, â€œPG&Eâ€ PMU on portables 79c50 Curio Enhanced 8530 + 5380 + Ethernet CS4216 Crystal Semiconductor audio CS4217 Crystal Semiconductor audio uPD72070GF New Age NEC765-derived FDC 85c80 Combo AMD 8530 + 53c80 MPC106 Grackle M50753 PMU PCI1130PDV PCI/Cardbus bridge WD90C26 PowerBook 165c/180c video chip (not â€œPangolaâ€, which is separate) WD90C55 PowerBook 165c/180c LCD driver