Simple DDT "HI" program - can be expanded to "hello world" if ambitious enough.
Start DDT A100 # Start assembly at location $100 mvi c,2 # Put 2 in the C-register for Console Out mv e,48 # $48 is ASCII H call 5 # entry point for all system calls (BDOS) mvi c,2 # Put 2 in C-register for Console Out mvi e,49 #$49 ASCII I call 5 # BDOS call again rst 7 # return to DDT g100 to execute, should print something like "HI" with memory location after. Tons of fun! Brian On Sat, Mar 16, 2024 at 3:12 PM Will Senn <will.s...@gmail.com> wrote: > Brian, > > Definitely. DDT is great. I'll be working through that next. I finally got > a program working and assembled - from the 2.2 manual - read chars until *. > Now, I just gotta get hello, world working.... I was sure, it would work... > oh, wait, when it says to CALL CPM, I bet it's not talking about where CP/M > is DE1EH... I bet it's that 0005H entry point... off to explore. > > Will > > On 3/16/24 1:08 PM, Brian Brindle wrote: > > If you just want to play, don't discount ddt in CP/M. Cheap and dirty way > to play with everything. > > On Sat, Mar 16, 2024, 1:48 PM Stephen Adolph <twospru...@gmail.com> wrote: > >> regarding file transfer, use >> IMPORT >> or >> EXPORT >> in CP/M. Included in package. >> These programs access a "TPDD". Filenames are 8.3 format, >> >> cheers >> Steve >> >> On Sat, Mar 16, 2024 at 1:36 PM Will Senn <will.s...@gmail.com> wrote: >> >>> I broke down and started reading the manuals (REXCPM, CP/M 2.2, etc). >>> It's starting to come together (again?)... I've inlined the answers I >>> figured out for posterity or the next clueless newb who comes along. >>> >>> On 3/16/24 11:00 AM, Will Senn wrote: >>> >>> 2. CP/M works from RexCPM, which is great, cuz CP/M recognizes more >>> memory: >>> >>> 64K CP/M 2.2 M100 CP/M + REXCPM 2MB 1.0 >>> >>> Yes, it does recognize more memory and it serves up an A: drive that's a >>> big chunk of that 2MBs. Solid. Talked about here: >>> http://bitchin100.com/wiki/index.php?title=M100_CP/M >>> >>> My questions are as follows: >>> >>> 4. In CP/M, how do I get back to MENU? >>> >>> Duh, F8 :). >>> >>> 5. When I start CP/M, is it just running CP/M against the M100's memory >>> or am I in some special whizbang virtual environment where I have >>> additional disks available somehow? >>> >>> It's a whizbang environment for sure - 64K ram and a nearly 2MB A: drive. >>> >>> As for my broken ASM, another duh, thanks John for the tip - I need to >>> write a CP/M friendly program that call it's routines and not the ROM calls. >>> >>> CP/M seems the way to go, though. It kinda reminds me of RT11, but with >>> ASM instead of MACRO11. ed... well, after you figure out that you need to >>> retrieve the file contents into the buffer, it kinda makes sense - nice >>> video - I love ED: >>> https://www.youtube.com/watch?v=7pqaj050X7g >>> >>> Still need to figure out how to get files into and out of cp/m though... >>> >>> Off to read some more. >>> >>> -will >>> >> >
