Rev 4 Accelerator
Rev 7 Accelerator
Rev 3 RAM32
Rev 3 RAM8
Hi Res Version, Rev 3 RAM32
- 2541 x 909, 623K
Hi Res Version, Rev 3 RAM8
- 2592 x 993, 651K
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- 882 x 1111, 167K
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030@25MHz, 030@28MHz, 030@33MHz or 030@50MHz
FPU: 68882 (PGA) at the same speed as the processor (optional seperate clock).
MMU: Internal
Max RAM: RAM8 - 4/8MB (AutoConfig).  RAM32 - 28/33MHz 2/4/8MB (AutoConfig).  RAM32 - 50MHz 4-20MB (early) or 4-32MB (later)
RAM Type:

30pin 1MBx8 nibble-mode with RAM8 <50Mhz (70ns/80ns), and 60ns page mode for 50Mhz (rare)
GVP 64pin SIMM32 with RAM32 card.  28/33MHz - 1MB SIMM32 only.  50MHz - 1MB/4MB SIMM32 or only 4MB SIMM32. 

An accelerator for the A2000 which plugs into the CPU Fast Slot. This product was the first 68030 card that GVP released for the A2000. It consists of two boards which are connected together, one containing the accelerator components of the 68030 CPU, FPU, and a hard disk interface (AT/IDE).  The second PCB contains the RAM controller logic. The CPU card can also take the special -07 UNIX Boot ROMs as found on the Commodore A2620 or A2630 to support the alternative Commodore operating system Amix (if installed previously), or use them to boot into 68000 mode (Rev 7/8).

Two types of RAM cards were made, and each is configured for a specific speed and memory module configuration. The original, called the RAM8, can support 4MB and 8MB of AutoConfig memory only.  It contains 8 x 30pin SIMM slots, and for 25-33MHz models uses a specific nibble-mode 30-pin SIMMs type, 4x/bank.  The modules were popular on the 68030 Mac and other 68030 platforms, and complement the burst-mode of the 68030.  The 50Mhz version of this RAM8 card is an exception on the memory type.  It uses only page-mode DRAM.  The RAM8 memory design uses 80ns for 25/28MHz, 70ns for 33MHz, and 60ns for 50Mhz

The later model, called the RAM32, supports several memory capacity configurations depending on the intended speed configuration of the board.  It contains 8 x GVP SIMM32 slots, which are a custom 64pin 32-bit module.  They are not compatible with the various other 64pin and 72 pin SIMM formats of the era.  The 33MHz RAM32 board supports 2MB, 4MB, and 8MB AutoConfig setting with 2x, 4x, and 8x of the 1MB SIMM32s. 

RAM32 jumper settings (all reserved):

ON - J1, J4, J5, J6, J8
OFF - J2, J7, J11,
CN12 - 1/2

The RAM32 board, in two configurations for the 50MHz speed, supports either 2-20MB, or 4-32MB memory configurations:

2-20MB - The top 4 SIMM32 sockets support 2MB or 4MB AutoConfig memory. With J5 on, the lower 4 SIMM32 sockets support another 4x 1MB SIMM32 modules for 8MB.  With J5 removed, the lower 4 SIMM32 sockets expect 4MB SIMM32 Memory modules, and are software-mapped by the v3.3 AT ROM on the front card.  1MB modules can be used, but they will not be a contiguous memory block.

4-32MB - 4MB AutoConfig (top SIMM32 slot populated) when J5 is on, & the remaining 7 SIMM32 sockets use 4MB SIMM32s for 28MB software-mapped >16MB by the AT 3.x ROM.  With J5 removed, 4MB-32MB is mapped by the ROM (contiguous) >16MB address range.

All GVP SIMM32 RAM is 60ns except for the 1MB type used for the 28MHz RAM32 cnfiguration, which supports 70ns.  The A3001-A3050 series products did not use the 16MB version of the SIMM32.

Speed Specific Jumper Settings:
J5 - On (28/33MHZ), Off (50MHz)
CN11 - 2/3 (28/33MHZ), Off (50MHz)
CN13 - Off (28/33MHZ), On (50MHz)

The PAL logic differs between most of the clock speeds on both memory boards.  In some cases, the PAL part speed/type is different.

68030 PCB Revisions:
Rev 4 - original, normally mated with the RAM8, hardware 68000 mode (disables accelerator card, memory, and AT interface) is manual toggle
Rev 7 - Single ROM socket for the AT 3.x ROM, jumper for upper/lower ROM image select and to identify the AT interface is not in use.  Supports software 68000 mode toggle tool.
Rev 8 - FCC revisions.

The AT/IDE interface was designed before the AT/IDE spec finalized, and the timing was off after the spec was completed. A few drives were compatible with the earlier spec, but none of today's modern IDE devices are compatible.  The known drives to work included: Quantum 40/80AT, Seagate 157AT, Conner 2040/2080AT, Maxtor MXT200A (but not the MXT213A).  The AT/IDE interface is not available in 68000 mode.

Rev 7 PCB Jumper Settings:

J1 - Default On, Reserved.
J2 - Default Off, Reserved.
J4 / J5 - FPU Clock Source.  Only one is jumpered.  J5 On = Same as CPU clock in U1.  J4 On = FPU clock is different in U2.
J6 - Default Off.  On = Disable MMU
J7 - Default Off for < 50MHz.  Default On for = 50MHz
J9 - Default On.  Off for Enable U24/U25 Boot Selection ROMs
J10 / J12 / J13 / J14 - Default [Off / Off / Off / On] for the common B2000 Rev 4.1-4.5 and 6.x motherboard.  Invert all 4 jumpers and remove the 68000 CPU for the German A2000 motherboard.
J11 - Default Off (68030 / board enabled).  On = 68000 fallback mode (board disabled).
J15 - Default On, enable onboard ROM socket U34
J16 - Default On, Reserved.
J17 - Bank select of U34.  On = upper bank of a 27C256, Off = Lower bank of a 27C256, or ROM is a size 27C128.

Page contributors: Francisco Rabay Jr, NicDouille, RiWa & Friends, Robert Miranda (GVP Tech Support)
Updated: 7/23/2022 . Added: 12/22/2004