4.15 gvpscsi.device ROM

[Grega]

Hi

I'm trying to find this in a format which is 16KB and not 45KB.
On Ralphs site the .bz2 file extracts to be 45KB in size.
The ROM data should be 16KB i suspect as a binary file ; however, when stacking it to put on a 27C512 64KB EPROM x 4 times it doesn't quite work out for me.

I've seen folks have issues with burning this as well there was an alternate site i found that had this for a 27C256 but its gone now.

I have a GQ4X and have burnt to these chips before with no issues ; this I just can't suss out. Any ideas where I am going astray?

[Grega]

yes dude, i know, when i open it in the software as hex and save it as binary it becomes 16KB. so all good.

the problem is when i stack the 16KB binary files to be 64KB on the 27c512 ROM, it does not work. this i can't figure out mate.

[Grega]

Castellen, many, many thanks.
I think I sussed it though. ie:
I took the 45Kb HEX image, converted to binary which gave me a 16Kb file.
I opened that in the GQ4X software and copied the block of data to the end of 16Kb.
I then took the 'read' original ROM in the GVP and loaded that, and pasted it 4 times to the chip in the respective correct memory locations to make a 64KB file.
Note the tail end of the GVP ROM ends with two lines of 00 (not FF) so i matched those OK.
I get a boot operation fine with the standard 50MB Quantum SCSI drive BUT i don't get a boot condition with the 1GB Quantum SCSI drive - which could be due to jumpering - jury is out at this stage.
I will have a look at the images you've pointed me at to see how they compare.

Thanks again mate!

[Grega]

yes. that seems to be working now; in that I can see the drive in HDtoolbox and partition it. win. a good result.
FWIW i took the GVP_HC+8scsi_v4-15_27C256.bin and basically did a (in windaz 10) copy /b GVP_HC+8scsi_v4-15_27C256.bin+GVP_HC+8scsi_v4-15_27C256.bin GVPNEW64KB.bin - then burnt GVPNEW64KB.bin to a 27c512 ROM.
in with the ROM and off we go.
note: my drive is a quantum 1080S - 1GB SCSI 'Fireball' --> I have A2 and A1 jumpered (default) and TE jumper set. The PK jumper is removed.
only issue I have now is trying to get the bloody OS on there LOL ; i reboot and the GVP just sits there with the hard disk light stuck on going nowhere. the usual 2 finger mouse to select boot doesn't seem to work either. oh well. further than I've been

thanks heaps.