GVP A2000 HC & GVP A2000 HC2 ROMS (Help)!!!!

[Nostalgiac]

Hi,

I have this same card GVP A2000 HC2
When I bought it originally it had the 2 v1.0 roms.

Somewhat later I bought the upgrade so that it would support RDB and newer scsi command, it was called FaaastROM".

the upgrade consisted of ONE v3.07 ROM (double the size) and a PAL chip that had to be replaced. The single rom went into the "even" socket,and the "odd" socket is now empty.

So as far as I know you cannot simply split into 2 seperate eproms. You need that PAL.

btw... these are all versions:
1.0 : original
2.2/2.3 : removable media support
3.07: support for RDB, Direct SCSI; MUCH faster
3.12: same as 3.07 but with faster autoboot, and extra support for some accelerator ram (I guess dma ?)
3.14/3.15:  later cards had a WD33C93A scsi chip, this rom supported this chip better and was again faster.
4.0 or 4.3 ?? ... last version that can work with these cards (Series I) : enhanced support for removable media based on AmigaDOS 2.0 FastFileSystem

hope this explains
Tom

[Nostalgiac]

Hi Computolio,

I just rechecked my original docs again, and have partial good news:

The HC card WITHOUT memory does not need the pal chip, so it should be sufficient to stick the single v3.07 rom chip in the EVEN socket, and leave the odd empty.

The HC+2 card MUST have the pal. My card obv does, but sadly I cannot remember which chip it was I replaced (there are 6 pals on there) but I GUESS it was U39 .... purely based on the layout of the board

Btw, the checksum of my rom v3.07 chip is ECD9

My advice: try upgrading the HC card... but forget about the HC+2

ta
Tom