HP-71 Compu-LS module

[Christoph Giesselink]

(03-06-2017 07:50 PM)Dave Frederickson Wrote:  Can you make an image of the EPROM using ROMCOPY? That would make it easier to remove any file protection.

Hi Dave,

sorry I don't agree with you. A copy with ROMCOPY may destroy the original checksum or will add a checksum which isn't inside.

I personally prefer most times the original data, even if they are wrong or inaccurate. And it doesn't matter if the data are measuring values, data send to a printer or in our case a ROM image.

With the original data you can convert these data into every wanted format, because you still have all information. In the case of ROMCOPY you may loose the checksum information and so you aren't able to recover the original data.

You suggested to use a 9114 disc drive or a 82161A tape drive to make a ROMCOPY when you don't have a PIL-Box. But how you can use ILvlif to make an image without a PIL-Box?

Even if you have 9114 disc with the data, do you still have a PC with a disc dive and an operating system which can read a LIF disc?

So IMHO the alternative to a PIL-Box is the HP82164A HP-IL/RS232 interface or the HP82973A HP-IL interface card.