Quick correction, if you don't have a Z80 rst 7 is gonna end poorly -
try rst 6 instead.
Only see these things AFTER hitting send..
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 6 # return to DDT
g100 to execute, should print something like "HI" with memory location
after.
Still tons of fun!
On Sat, Mar 16, 2024 at 4:03 PM Brian Brindle <bbrin...@gmail.com> wrote:
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
