c18d42f08b
Previous refacoring broke all seek/tell within fs. fs handles now lost the responsibility to keep track of current position. It's blkdev's job.
1.4 KiB
1.4 KiB
Assembling z80 source from the shell
In its current state, Collapse OS has all you need to assemble z80 source from within the shell. What you need is:
- A mounted filesystem with
zasmon it. - A block device to read from (can be a file from mounted CFS)
- A block device to write to (can theoretically be a file, but technical limitations temporary prevents us that. We'll use a mmap for now).
The emulated shell is already set up with all you need. If you want to run that on a real machine, you'll have to make sure to provide these requirements.
The emulated shell has a hello.asm file in its mounted filesystem that is
ready to compile. It has two file handles 0 and 1, mapped to blk IDs 1 and 2.
We only use file handle 0 (blk ID 1) and then tell zasm to output to mmap which
is configured to start at 0xe00
Collapse OS
> fopn 0 hello.asm ; open file in handle 0
> zasm 1 3 ; assemble opened file and spit result in mmap
> bsel 3 ; select mmap
> mptr e000 ; set memptr to mmap's beginning
> peek 5
210890CD3C ; looking good
> mptr 4200 ; hello.asm is configured to run from 0x4200
> load ff ; load compiled code from mmap
> peek 5
210890CD3C ; looking good
> call 00 0000
Assembled from the shell
> ; Awesome!