On 12/28/2010 01:04 PM, Patrick Schaefer wrote:
Am 28.12.2010 16:19 schrieb Steven Hirsch:Unfortunately, there is little theory-of-operation data available. The PAL equations were not available initially. I bugged Chuck and was able to get some files, but he was unsure whether they were the actual production code.There are files available at http://www.prodev.biz/DDT/ddt.htm -- are these the ones you got?
Yes, the PAL sources are not there. I didn't have the interest in reverse engineering them from the fuse map.
The 74S287 are 256x4 bit proms. With an adapter, you can put them into a 2716 socket and dump the data.
Yes, but without a theory of operation I'm quite in the dark as to what that code does.
I'm sure this is all doable, but I just... lost interest.