I will look at these as well. Incidently, my cbm-transfer for windows has a built in disassembler with selectable platforms for most cbm 8-bit machines plus a special “identifier” platform that can identify rom calls. It also has a hex viewer with compare function to spot differences, can enable masking bits to show screen codes and can be synchronized to the disassembler listing. Steve > On Sep 6, 2021, at 3:39 PM, Hans Liss <Hans_at_liss.pp.se> wrote: > > Better link: http://www.zimmers.net/anonftp/pub/cbm/firmware/misc/unknown/ > > The low count of "a9" bytes in several of these is a sure sign it's not 6502 code. I took a quick look at a few: > > 8in-cpm-trbdos.bin is definitely Z80 code (or 8085, perhaps?). A CPM "driver" for 8-inch floppies, perhaps? > 740turbo1-1.bin is also Z80 code. > I suspect ultima-ii-v1-73.bin is also Z80 code. > create-new-base.bin and 40-80-60h.bin seem to be something else, like not program code at all. > I found a fairly useful disassembler at https://onlinedisassembler.com/odaweb/, by the way. I tend to use wfdis for 6502 code, but this one has many other architectures and accepts small hex dumps as input. > > /Hans > >> On 2021-09-06 19:23, Bo Zimmerman wrote: >> Hello all, >> >> Dave McMurtrie contributed a nice pile of PET option rom images to the funet/zimmers archive _at_ http://www.zimmers.net/.../computers/pet/other/index.html >> >> I had no trouble identifying and classifying most of them. However, there were several that I could either not get working, properly disassembled,, or just couldn't identify. This is fairly new to me, so I created a special place for them here: >> http://www.zimmers.net/ano.../pub/cbm/firmware/misc/unknown/ >> >> If anyone out there enjoys digital archeology, I'd ask you to give a second or third opinion on some of those unknown roms. It's possible the eproms were just corrupt or unreadable, but I'd sure like someone else to concur before I throw any of the images out. >> >> - Bo Zimmerman >> >>Received on 2021-09-06 23:03:22
Archive generated by hypermail 2.3.0.