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collapseos
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54 Commits

Author SHA1 Message Date
Virgil Dupras 73c3fc7947 shell/stdio: decouple from blkdev (again) 
Move load/save to blkdev_cmds and add a new "poke" builtin shell cmd
that is the mirror of "peek" and strictly uses stdio (no blkdev
involved).

This allows us to slim the minimal OS size but, more importantly, change
the behavior of "load" so that we don't expect GetC to block until Z is
set. This way, using "load X" with X being larger than the blkdev size
won't block forever.

This also brings our RC2014 minimal kernel below the 1K mark again.
 2019-06-02 11:06:38 -04:00
Virgil Dupras 88bf98321e fs: adjust to DE->IX change in recipe/emul glue code 2019-06-02 10:18:03 -04:00
Virgil Dupras 2e8af376e3 pgm: new kernel module 
The pgm module implements a shell hook so that when an unknown command
is typed, we look into the mounted filesystem and look for a file with
the same name as the command. If we find one, we load it in memory and
run it.
 2019-05-31 14:54:15 -04:00
Virgil Dupras 83771b538f fs: check for file size bounds in GetC 2019-05-31 11:12:29 -04:00
Virgil Dupras cdc865f8c6 tools/emul/shell: add debug output 2019-05-30 14:55:16 -04:00
Virgil Dupras 6403ab1acf zasm: add support for SRL r 2019-05-30 14:46:25 -04:00
Virgil Dupras 328f44814e Make blockdev pointers 32 bits 
This allows us to break through the 64K limit for includes CFS in zasm,
a limit we were dangerously close to breaking. In fact, this commit
makes us go over that limit. Right in time!
 2019-05-28 19:42:35 -04:00
Virgil Dupras 2c80924df9 zasm: indicate include lineno in errors 2019-05-28 09:57:29 -04:00
Virgil Dupras 8def8e7c38 zasm: add lineno to error reports 
For now, top-level only
 2019-05-27 20:52:40 -04:00
Virgil Dupras e1e6d52fea zasm: add ERR_BAD_FMT 2019-05-27 11:58:12 -04:00
Virgil Dupras 412b3f374a zasm: add ERR_BAD_ARG 2019-05-27 11:22:38 -04:00
Virgil Dupras af2c561c6b zasm: begin erroring out reliably 
Up until now, invalid source input had undefined behavior. We're now
beginning to define that behavior so that zasm can be a bit more usable.
 2019-05-27 11:04:31 -04:00
Virgil Dupras 8923fefeff Update docs 2019-05-20 12:11:45 -04:00
Virgil Dupras c40bc329d5 zasm: fix expr returning wrong values on first pass 
To run a parseExpr on first pass would always return a false success
with dummy value because symbols are configured to always succeed on
first pass. This would make expressions like ".fill 0x38-$" so bad
things to labels because "0x38-$" wouldn't return the same thing on
first and second pass.

Revert to parsing literals and symbols after having scanned for
expressions and add a special case specifically for char literals (which
is why we scanned for literals and symbols first in the first place).
 2019-05-20 10:46:27 -04:00
Virgil Dupras e18f9b53a9 zasm: add support for "$" symbol 
Allows for the ".fill x-$" pattern.
 2019-05-20 09:17:50 -04:00
Virgil Dupras 207adbc2f8 tools/emul: add "make rescue" command 2019-05-20 08:58:53 -04:00
Virgil Dupras 848a7500bc zasm: add support for .fill directive 2019-05-20 08:39:53 -04:00
Virgil Dupras c586c0d63c Make the shell emulator be built by zasm 2019-05-20 07:29:19 -04:00
Virgil Dupras fa3b86a5c1 zasm now bootstraps itself without scas! 2019-05-19 20:44:19 -04:00
Virgil Dupras bc1496a7e3 zasm emul: bring back kernel/user distinction 
It was a bad idea to remove it. Now that I'm introducing the concept of
a per-app glue file, it becomes much easier to build emulated zasm as a
userspace app.
 2019-05-19 12:57:59 -04:00
Virgil Dupras 7fad3b0c90 Move /parts/z80 to /kernel 
Let go of that "meta os" thing. it's not as meta as I made it sound
like. It's a kernel.
 2019-05-19 11:19:41 -04:00
Virgil Dupras d9fff16157 zasm emul: get rid of the kernel/user distinction 
Made things complicated for nothing.
 2019-05-19 09:14:40 -04:00
Virgil Dupras 98695f9912 zasm: de-index symRegister 
Make symRegister's logic pointer-based so we can break through the 0x100
limit.
 2019-05-19 09:06:24 -04:00
Virgil Dupras f44c3e5413 zasm: fix 3-digit hex parsing 2019-05-17 23:00:57 -04:00
Virgil Dupras 157ac03e25 zasm: can now assemble zasm/util.asm! 2019-05-17 20:47:43 -04:00
Virgil Dupras 28d5ebdc8a Make apps folder into a namespace 
To straighten out includes and to pave the way into zasm being part of
the same "include CFS" as parts, we make zasm includes namespaced.
 2019-05-17 20:22:32 -04:00
Virgil Dupras 93e40aeb09 Strip comments out of code before packing CFS 
This shrinks the CFS size to 21k from nearly 64K. This will allow me to
kick the can down the road a bit with regards to supporting storage
seek/tell greater than 64K.

I'll get to it, but first, I want to assemble zasm with zasm!
 2019-05-17 19:54:35 -04:00
Virgil Dupras 807bd70b63 zasm emul: add dumpSymbolTable debug routine 
Very helpful...
 2019-05-17 13:22:45 -04:00
Virgil Dupras 7083116379 zasm: remove JUMP_ prefixes 
They serve no purpose and make the code less flexible.
 2019-05-17 09:50:11 -04:00
Virgil Dupras 013a3b74c8 Add the concept of unit tests 
Will be much much easier to tests new core routines without having to
re-create their context first.

Also, extract parse.asm from core.asm
 2019-05-17 09:33:20 -04:00
Virgil Dupras 45b8e84e2a shell: de-macro-ize 2019-05-17 08:21:37 -04:00
Virgil Dupras 56760b5aba stdio: de-macro-ize 2019-05-17 08:14:19 -04:00
Virgil Dupras dfce0d3a62 tools/emul: fix shell RAMSTART 2019-05-17 07:55:28 -04:00
Virgil Dupras def6c2123d tools/emul: clean up the place a bit 2019-05-17 07:23:59 -04:00
Virgil Dupras 2f0dd5d668 zasm: iiiiiiiincluuuuuuudes!!1! 2019-05-16 21:15:00 -04:00
Virgil Dupras e18879fcb2 zasm emul: hook fsdev in glue code 2019-05-16 13:23:23 -04:00
Virgil Dupras df67a38f81 Extract fs_cmds.asm from fs.asm 2019-05-16 13:20:29 -04:00
Virgil Dupras 23f0dc18ca zasm emul: add tooling for includes fsdev 
On build, pack `parts/z80` into a CFS and embed it into the emulated
zasm executable as an fsdev. This will allow for the upcoming include
directive to have something to go to.

For now, this is useless except for inflating the emulated zasm's size.
 2019-05-16 12:07:57 -04:00
Virgil Dupras 0ae91e55ec zasm: big local symbols overhaul 2019-05-16 08:26:00 -04:00
Virgil Dupras fa28d64278 zasm: change ioRewind to ioSeek 
Will need it soon.
 2019-05-15 13:41:56 -04:00
Virgil Dupras 878bc2919f zasm: add support for relative labels 2019-05-12 22:07:21 -04:00
Virgil Dupras 1e3982d3ab zasm: make DE indicate the last line to be read 
Facilitates debugging
 2019-05-12 21:44:59 -04:00
Virgil Dupras 4f44d3de63 parts/z80/fs: add "fopn" command 2019-05-12 15:38:58 -04:00
Virgil Dupras 9b4b907236 tools/emul/shell: fix srong SeekL return value 
Also, add warning on attempts to write to ROM.
 2019-05-12 14:32:24 -04:00
Virgil Dupras a86738ae84 tools/emul/shell: add filesystem support 
With the help of the newly-introduced cfspack tool, we can mount a
filesystem in our emulated shell and play around. Read-only for now.
Unpacking incoming.
 2019-05-12 11:20:31 -04:00
Virgil Dupras 6aa53afabc zasm: add memdump mode 2019-05-12 08:49:59 -04:00
Virgil Dupras c239ec7dea zasm: read input in two passes 2019-05-10 20:32:05 -04:00
Virgil Dupras 6a804a9c64 zasm: buffer stdin in emulator 
Also, add a port for rewinding stdin.
 2019-05-10 19:55:01 -04:00
Virgil Dupras 34ee91a0d7 zasm: use blkdev IDs as input and output 
This will soon allow use to seek and tell on input, which is necessary
for a second pass which is necessary for forward symbol references.

This require making `blkSel` a bit more flexible. Rather than having one
global selected blkdev, each app can select its own, in its own memory
space.
 2019-05-10 19:33:34 -04:00
Virgil Dupras 5a6078df4d zasm: add support for hex literals 2019-05-09 22:14:11 -04:00