Great Valley Products A3001 (Impact A2000-030)

Company Great Valley Products, USA	Date 1989	Amiga A2000	Interface CPU slot	Autoconfig ID 2017 / 8,9,13

Company

Great Valley Products, USA

Date

1989

Amiga

A2000

Interface

CPU slot

Autoconfig ID

2017 / 8,9,13

processor

68030 @ 16 / 25 / 28 / 33 / 50 MHz, PGA
optional 68882 @ 16 - 50 MHz, PGA - can be clocked at different speed than the CPU

optional memory daughterboards

eight 30 pin SIMM sockets accept 4 or 8 MB RAM
supports only special 1 MB Nibble Mode SIMMs, they are more expensive than GVP SIMMs
accepts SIMMs in groups of four

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

optional IDE controller

two autoboot ROM sockets
to activate the IDE controller only the boot EPROM(s) (gvpat.device) has to be installed on the main board - the first version of the driver software required two EPROMs, later ones required only one
does not support drives that has more than 1024 cylinders
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

notes

autobooting requires at least Kickstart 1.3 - the autoboot ROM should not be installed with Kickstart 1.2
two ROM sockets for UNIX boot ROMs that require an A2090A SCSI controller - these ROMs are compatible with those on the A2630
68000 fallback mode selectable by jumper
the memory and IDE controller is also deactivated in fallback mode

jumper settings - A3001

Jumper	Default	Description
J4	OPEN	Install to clock FPU from oscillator U2
J5	SHORTED	Remove to disconnect FPU from oscillator U1
J6	OPEN	Install to disable the 68030’s caches
J7	OPEN	Install to disable the 68030’s MMU
J8	OPEN	Install to enable Unix boot register
J9	SHORTED	Remove to enable 68030 boot EPROMs
J10	SHORTED	Remove for use in German 4-layer A2000’s
J11	OPEN	Install to boot in 68000 mode
J12	OPEN	Reserved
J13	OPEN	Reserved
J14	SHORTED	Reserved
J15	OPEN	Reserved (AT interface)
J16	SHORTED	Reserved (AT interface)