0002 0076 Colorboard 264 Specification Rev C1

ColorBoard 264 (Cheapskate) Specification July 28, 1988 Primary Design Goal Replacement for ColorBoard 64 and 64N, with features to support Apple's Full Color QuickDraw, and optional NTSC output via a daughterboard. Once 264 production starts, 64 and 64N production stops. Target Retail Price $1595 Availability Introduction Shipping November 1988 January 1989 Resolution 640x480 640x486 66Hz 30Hz 13" monitor NfSC 72DPI One local oscillator with one external (NTSC). Resolutions are software selectable (no DIP switches), via keyboard at boot time. 1.5 Meg video RAM (1024 x 512 x 24 bits) Pixel Depth 1,2,4,8 and 24 bits per pixel. 1,2,4, and 8 bits per pixel is indexed; 24 bits per pixel is full chunky direct. 24-bit chunky planar hardware available; availability in software with release 1.0 TBD. Chunky planar available in hardware, availability with release 1.0 ROM TBD. Max 256 colors (indexed) and 16.7 million colors (direct) from 16.7 million palette. Configuration ROM 27256 EPROM (32K bytes) Video • RS-343A compatible • 15 pin D-subminiture connectors (same as Apple's) • 35Khz monitors supported (optional 31.49Khz) • VLSI controller • NTSC output (optional) • Separate sync for VGA compatability Slot • Single NuBus slot • 32-bit addressing (fat slot) • X Amps at 5 Volts • NTSC option control bus Register Add 15.0 Bits Default Value CM ODE CM ODE 6004 6008 3RW 3C OSC30HZ NMRQ NMRQ DACCTL 600C 6010 6014 6018 2RW 1RW 1C 2RW FORCEBLK* EXSYNMODE FATSLOT 601C 6020 6024 1RW 1RW 1RW RDOUTST SYNC EN TRANS EN STVTOTAL VCNTRES NM RODIS VSYNEND VBLKGO VTOTAL HSYNCEND HBLKEND HBLKGO HTOTAL HHLFLIN VBLKEND BLKENABLE 6028 602C 6030 6034 6038 603C 6040 6044 6048 604C 6050 6054 6058 605C 6060 6064 1R 1RW 1RW 1R 1RW 1RW 4RW 10RW 10RW 9RW 9RW 9RW 9RW 9RW 6RW 1RW 1** CHUNKY MODE CHUNKY, MODE1 , MODEO 000 1 BIT MODE CHUNKY,MODE1,MODEO 001 2 BIT MODE 010 4 BIT MODE 011 8 BIT MODE OSCSEL , 30 HZ MODE 00 NMRQBIT 0 N/A NMRQBIT OOCHUNKY DACS1,DACSO 10 PSEUDO COLOR 1 FORCE BLANK (ACTIVE LOW) 0 ENABLES EXTERNAL SYNCS 1 FAT SLOT FORCES FAT SLOT ADD DECODE 0 SKINNY SLOT N/A READS MPRES,MTYPE,OPTON 1 ALLOWS SYNC TO GO ACTIVE 1 TRANSFER CYCLE ENABLE N/A READS VTOTAL FROM VIDEO RESETS ALL VIDEO COUNTERS 0 0 DISABLE THE NMRQ INTERUPT 002 HEX VERTICAL SYNC END COUNT 209 HEX VERTICAL BLANK START COUNT 20C HEX VERTICAL TOTAL COUNT OOF HEX HORIZONTAL SYNC END COUNT 027 HEX HORIZONTAL BLANK END COUNT OC7 HEX HORIZONTAL BLANK START COUNT OD7 HEX HORIZONTAL TOTAL COUNT 06B HEX HORIZONTAL HALFLINE COUNT 029 HEX VERTICAL BLANK END COUNT THIS BIT ENABLES BLOCK MODE 0 Bits Definition A-Readable W - writeable C - Clearable Clearing a register is done by writing to the registers clear address with a 1 in each bit position to be cleared. *DONOTCARE Description CHEAPSKATE BOARD ADDRESS SPACE (FAT SLOT) COMPONENTS ADDDRESS SPACE NEEDED IN HEX 20 0000 2M BYTES 0 1000 4K BYTES 0 1000 4K BYTES 0 8000 32K BYTES RAM STATUS DACCONTROL FOv1 ROM ADDRESS LINES ARE AD<14 …