processor
- 68030 @ 33 / 50 MHz, PGA
- 68882 @ 33 / 50 MHz, PGA - clocked separately from the CPU
memory daughterboard (68030-RAM32)
- eight 64 pin SIMM sockets accept up to 8 or 20 MB RAM
- supports only special 1 or 4 MB, 60 ns GVP SIMMs
- 60 ns SIMMs are required for 50 MHz, 70 ns for 33 MHz, 80 ns for 25 MHz
- 16 - 33 MHz boards support 1 MB SIMMs only, possible configurations are 2, 4 and 8 MB
- 50 MHz boards support 4 MB SIMMs, possible configurations are 4, 8, 12, 16 and 20 MB
- using a 4 MB SIMM requires four 1 MB SIMMs to be installed in sockets 3 to 6, so the 4 MB SIMMs can only be installed into sockets 7 to 10
IDE controller
- autoboot ROM (gvpat.device)
- does not support drives that has more than 1024 cylinders
- autobooting requires at least Kickstart 1.3 - the autoboot ROM should be removed with Kickstart 1.2
- controller uses byte-swapped storaging, so the HDD will be unreadable on other controllers without that feature
- 40 pin internal IDE header
- A-Max II driver (gvpat.amhd) - requires gvpat.device v2.4 and A-Max v2.06
jumper settings
- main board (rev 7):
J4
ON
OFF | J5
OFF
ON | - FPU clock
- from oscillator U2
- from oscillator U1 |
J10
ON
OFF | J12
ON
OFF | J13
ON
OFF | J14
OFF
ON | - clocking mode
- A2000-A german motherboard, 68000 must be removed
- A2000-B motherboard |
| J6 - | MMU: ON - disable |
| J7 - | CPU clock: OFF - 50 MHz, ON - lower |
| J9 - | 68030 Boot code EPROMS (U23 and U25): OFF - enable |
| J11 - | 68000 fallback mode: ON - enable |
| J15 - | IDE autoboot EPROM (U34): ON - enable |
| J17 - | IDE autoboot EPROM type: ON - 27256, OFF - 27128 |
| J18 - | IDE drive: OFF - connected (with autoboot EPROM v3 or later) |
- memory board (rev 3):
J3
OFF
ON | CN11
OFF
2-3 | CN13
ON
OFF |
- 50 MHz
- lower clock |
J5
ON
OFF | - memory address of CN7-CN10 SIMMs
- Zorro II address space (with 1 MB SIMMs only)
- 0x01000000 (with 4 MB SIMMs only) |
J1, J4, J6, J8
ON | | J2, J11
OFF | | CN12
1-2 |
- reserved |
notes
- two ROM sockets for UNIX boot ROMs that require an A2090A SCSI controller - these ROMs are compatible with those on the A2630
- the memory and IDE controller is also deactivated in 68000 fallback mode
Photo
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Series II, front side
Series II, back side
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RAM32 board, front side
RAM32 board, back side
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