A3000 RomTower
KICKSTARTS:
1.4 or the 'Boot ROMs' looked for a file called devs:kickstart to boot up
2.04 available in ROM and as a kickstart file. All 3000's were to come with
either one of these.
3.1 This is available as an upgrade
ROM chips are a pair of 40 pin DIPs.
CPU:
68030 at 25MHz or
68030 at 16MHz
FPU:
68882 at 25MHz
68881 at 16MHz for 16MHz machine
CHIPS:(ECS)
Denise - 8373 SuperDenise
Paula - Standard Paula
Agnus - 8372B or 8375 Agnus for 2 meg CHIP RAM
Gary - Fat Gary
Amber - De-interlacing chip to provide 31KHz video
Buster - SuperBuster -07, -09 and -11
DMAC - SuperDMAC -02, -04
Ramsey - Ramsey -04 and -07
RAM:
CHIP RAM Uses 44256 DRAM DIPs for up to 2 megabytes
FAST RAM uses 1x4 Static Column OR Page Mode ZIP DRAM for up to 16
Megabytes
or
FAST RAM uses 256x4 Static Column OR Page Mode ZIP DRAM up to 4 Megabytes
or
FAST RAM uses 44256 DRAM DIPs for 1 Megabyte of FAST RAM. May not be used
in conjuction with ZIPs.
PORTS:
15KHz Video
31KHz Video
External Disk drive
Parallel Port
External SCSI Connector
Serial Port
Mouse/Joystick ports
5-pin DIN Keyboard Port
Left and Right RCA Audio
SLOTS:
1 Video Slot. In line with ZorroIII slot
1 xxx pin CPU slot
4 ZorroII/III 16/32-bit Expansion slots
2 16-bit ISA slots (for use with BridgeBoard Devices) inline with ZorroIII
slots
MOTHERBOARD REVISIONS:
7.x Used a ROM tower to hold the ROMs
8.x ??
9.x Eliminated use of a ROM tower
Also has labels on the motherboard for jumpers
Jumper Pins -01 -02 -03 -04 Function ---------------------------------------------------------------------------- J100 4 2-3 2-3 1-2 1-2 Quadrature Clock Phasing J101 3 2-3 2-3 2-3 2-3 FPU Clock Source J102 3 2-3 2-3 2-3 2-3 System Clock Source J103 4 3-4 3-4 3-4 3-4 FPU CS/BERR J104 3 1-2 1-2 1-2 1-2 CPU Clock Source J151 3 2-3 2-3 1-2 1-2 ROM Timing J152 3 2-3 2-3 1-2 1-2 ROM Timing J180 3 2-3 2-3 2-3 2-3 A2000 ROM Compatibility Jumpers J181 3 2-3 2-3 2-3 2-3 A2000 ROM Compatibility Jumpers J200 3 1-2 2-3 1-2 2-3 NTSC/PAL Select J350 3 1-2 1-2 1-2 1-2 Tick Clock Source J351 3 2-3 2-3 2-3 2-3 Disable DF1: (1-2 to enable) J352 3 2-3 2-3 2-3 2-3 Light Pen Source J481 3 2-3 2-3 2-3 2-3 VDE Scan Double Only Jumper J482 3 1-2 1-2 1-2 1-2 VDE PLL Loop Adjust J483 3 - - - - VDE Factory Test Points J800 3 1-2 1-2 1-2 1-2 WD33C93 J851 3 1-2 1-2 2-3 2-3 RAM Controller Speed Jumper J852 5 4-5 4-5 4-5 4-5 -012A Ramsey only (See Notes) J853 3 2-3 2-3 2-3 2-3 -012A Ramsey only (See Notes) J852 connecting pins 2 & 3 : 1Mbit, in 256k x 4 J852 connecting pins 1 & 2 : 4Mbit, in 1m x 4 Notes: J150, J151: ROM Timing. The ROM timing circuit provides four different speed settings to match the output enable and access timing of the system ROMs. To set the jumpers, determine the output enable time and access times for the ROMs you wish to use. The ROM must have lower values than for the setting you select. System standard ROMs have T(oe) = 110ns and T(acc) = 250ns. CLK J151 J150 T(oe)(min.) T(acc)(min.) 16 MHz 2-3 2-3 157ns 250ns 16 MHz 2-3 1-2 220ns 312ns 16 MHz 1-2 2-3 282ns 375ns 16 MHz 1-2 1-2 345ns 437ns 25 MHz 2-3 2-3 90ns 160ns 25 MHz 2-3 1-2 130ns 200ns 25 MHz 1-2 2-3 170ns 240ns 25 MHz 1-2 1-2 210ns 280ns J180, J181: ROM Compatibility Jumpers J180 J181 A2000/A500 ROMS: 1-2 1-2 A3000 ROMs: 2-3 2-3 J851-J853: RAM Controller Compatibility Settings J852 J853 -012A Ramsey w/ 256K4 RAMs 4-5 2-3 Later Ramseys w/ 256K4 RAMs 2-3 1-2 Later Ramseys w/ 1M4 RAMs 1-2 1-2
The A3000 also has NVRAM configuration which is powered by the same battery as the clock. It supports the following:-
SCSI Controller ID:
You can configure the SCSI controller ID to whatever ID you want, the default
however is 7.
You can set the length of time that the SCSI timesout, increases this may
prevent slowboot drives which haven't spun up yet from not being detected.
Synchronous SCSI mode, this may speed up many driver operations, but may also be
incompatible with some drives
You can turn on or off Multiple LUNs.
The A3000 has a DMA SCSI chipset based on the WDC33C93 Chipset and has a 50pin connector internally and a 25pin connector externally. A3000 Fast Slot Pins
Pin number Signal name 1 /DSACK1 2 GND 3 GND 4 /HALT 5 R/W 6 GND 7 GND 8 /BGACK 9 /SBR 10 GND 11 GND 12 /AVEC 13 EXT90 14 VCC 15 VCC 16 /RAMSLOT 17 /BOSS 18 VCC 19 VCC 20 FC0 21 /STERM 22 VCC 23 VCC 24 FC1 25 /BR 26 VCC 27 VCC 28 /CBACK 29 /BERR 30 DIS_CLKS * 31 /EMUL 32 /CBREQ 33 A8 34 ECLK30 * 35 GND 36 A0 37 A9 38 GND 39 GND 40 A1 41 A10 42 ECLK90A * 43 /INT6 + Pin number Signal name 44 A2 45 A11 46 ECLK90 47 GND 48 A3 49 A12 50 GND 51 GND 52 A4 53 A13 54 ECPUCLKB * 55 /WAIT 56 A5 57 A14 58 ECPUCLKA * 59 GND 60 A6 61 A15 62 GND 63 GND 64 A7 65 A16 66 reserved 67 /CI2P + 68 A24 69 A17 70 reserved 71 GND 72 A25 73 A18 74 GND 75 GND 76 A26 77 A19 78 DIS_CLK30 * 79 /PI2C + 80 A27 81 A20 82 reserved 83 GND 84 A28 85 A21 86 GND 87 GND 88 A29 89 A22 90 reserved 91 /DSACK0 92 A30 93 A23 94 VCC 95 VCC 96 A31 97 /DS 98 VCC 99 VCC 100 /ECS 101 /CIOUT 102 VCC 103 VCC 104 /DBEN 105 /BG 106 VCC 107 VCC 108 /RMC 109 /CPURST 110 /FPURST 111 reserved 112 EXTCPU 113 /EBCLR 114 /SENSEZ3P + 115 GND 116 /IPEND 117 /RESET 118 GND 119 GND 120 /IPL0 121 SIZ0 122 GND 123 GND 124 /IPL1 125 FC2 126 CLK90 127 reserved 128 /IPL2 129 SIZ1 130 GND 131 GND 132 /CIIN 133 /AS 134 /FPUCS 135 CPUCLKA 136 /OCS 137 D31 138 GND 139 GND 140 D15 141 D30 142 GND 143 GND 144 D14 145 D29 146 reserved 147 /CBR 148 D13 149 D28 150 reserved 151 GND 152 D12 153 D27 154 GND 155 GND 156 D11 157 D26 158 reserved 159 /BG30 160 D10 161 D25 162 reserved 163 GND 164 D9 165 D24 166 GND 167 GND 168 D8 169 D16 170 reserved 171 reserved 172 D0 173 D17 174 VCC 175 VCC 176 D1 177 D18 178 VCC 179 VCC 180 D2 181 D19 182 VCC 183 VCC 184 D3 185 D20 186 VCC 187 VCC 188 D4 189 D21 190 GND 191 GND 192 D5 193 D22 194 GND 195 GND 196 D6 197 D23 198 GND 199 GND 200 D7
Thanks to Rick Harris, Ron Mascaro and Greg Scott (National Amiga)