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| author | Benji Dial <benji6283@gmail.com> | 2020-09-19 14:53:29 -0400 |
|---|---|---|
| committer | Benji Dial <benji6283@gmail.com> | 2020-09-19 14:53:29 -0400 |
| commit | de20d7430df08731d9108acb83e1234ba7f1fe16 (patch) | |
| tree | 8646f3d1bae3d30391df34766e3e58c0c2af8aab /doc | |
| parent | 20853582d5385d12421433d21910e783caa00764 (diff) | |
| download | portland-os-de20d7430df08731d9108acb83e1234ba7f1fe16.tar.gz | |
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Diffstat (limited to 'doc')
| -rw-r--r-- | doc/ints.txt | 43 |
1 files changed, 21 insertions, 22 deletions
diff --git a/doc/ints.txt b/doc/ints.txt index d8abd6d..45c09b3 100644 --- a/doc/ints.txt +++ b/doc/ints.txt @@ -24,19 +24,23 @@ invalid system call numbers change eax to -1, and have no other effect. table 1: - function | eax | eax out | ebx | ecx | edx | esi | edi ----------------|-----|---------------|---------------|-------------|-------------|--------|----- - open file | 0x0 | handle | drive number | path | | | - close file | 0x1 | | handle | | | | - file read | 0x2 | read | handle | file offset | count | buffer | - get file size | 0x3 | size | handle | | | | - start task | 0x4 | handle | drive number | path | passed sz | | - log string | 0x5 | | sz string | | | | - get key | 0x6 | keycode | | | | | - allocate ram | 0x7 | start pointer | pages | | | | - memory info | 0x8 | see table 2 | see table 2 | | | | - wait for task | 0x9 | | handle | | | | - enumerate dir | 0xa | count | drive number | path | see table 3 | max | + function | eax | eax out | ebx | ecx | edx | esi | edi +----------------|-----|-----------------|----------------|-------------|-------------|--------|----- + open file | 0x0 | handle | drive number | path | | | + close file | 0x1 | | handle | | | | + file read | 0x2 | read | handle | file offset | count | buffer | + get file size | 0x3 | size | handle | | | | + start task | 0x4 | handle | drive number | path | passed sz | | + log string | 0x5 | | sz string | | | | + get key | 0x6 | keycode | | | | | + allocate ram | 0x7 | start pointer | pages | | | | + memory info | 0x8 | see table 2 | see table 2 | | | | + wait for task | 0x9 | | handle | | | | + enumerate dir | 0xa | count | drive number | path | see table 3 | max | + vga print at | 0xb | | row << 8 | col | sz string | | | + count of dir | 0xc | number of files | drive number | path | | | + clear screen | 0xd | | | | | | + set color | 0xe | | VGA color code | | | | table 2: @@ -55,12 +59,7 @@ eax -1 indicates unrecognized ebx table 3: edx of "enumerate dir" is a pointer to a buffer where an array of "directory info"s can be put. esi is the maximum number of "directory info"s to be placed in the buffer. -the "directory info" structure is defined as follows: - struct { - bool is_dir; - char name[100]; - uint32_t size; - } -"is_dir" here indicates whether or not the entry is another directory. -"name" is a null-terminated string, up to 99 characters, indicating the name of the entry. -"size" is the size of the file this entry refers to, in bytes.
\ No newline at end of file +the "directory info" structure is 128 bytes long. The first 100 bytes are a null-terminated string + indicating the name of the file represented by this entry. The next four bytes are a 32-bit integer + indicating the size of the file represented in bytes. The next byte's lowest bit is a one if this + entry is a directory, and a zero if this entry is not. The remainder of the structure is reserved.
\ No newline at end of file |