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@@ -26,40 +26,40 @@ |
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; *** CONSTS *** |
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; number of entries in shellCmdTbl |
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SHELL_CMD_COUNT .equ 7+SHELL_EXTRA_CMD_COUNT |
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.equ SHELL_CMD_COUNT 7+SHELL_EXTRA_CMD_COUNT |
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; maximum number of bytes to receive as args in all commands. Determines the |
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; size of the args variable. |
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SHELL_CMD_ARGS_MAXSIZE .equ 3 |
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.equ SHELL_CMD_ARGS_MAXSIZE 3 |
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; The command that was type isn't known to the shell |
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SHELL_ERR_UNKNOWN_CMD .equ 0x01 |
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.equ SHELL_ERR_UNKNOWN_CMD 0x01 |
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; Arguments for the command weren't properly formatted |
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SHELL_ERR_BAD_ARGS .equ 0x02 |
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.equ SHELL_ERR_BAD_ARGS 0x02 |
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; IO routines (GetC, PutC) returned an error in a load/save command |
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SHELL_ERR_IO_ERROR .equ 0x05 |
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.equ SHELL_ERR_IO_ERROR 0x05 |
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; Size of the shell command buffer. If a typed command reaches this size, the |
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; command is flushed immediately (same as pressing return). |
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SHELL_BUFSIZE .equ 0x20 |
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.equ SHELL_BUFSIZE 0x20 |
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; *** VARIABLES *** |
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; Memory address that the shell is currently "pointing at" for peek, load, call |
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; operations. Set with mptr. |
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SHELL_MEM_PTR .equ SHELL_RAMSTART |
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.equ SHELL_MEM_PTR SHELL_RAMSTART |
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; Places where we store arguments specifiers and where resulting values are |
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; written to after parsing. |
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SHELL_CMD_ARGS .equ SHELL_MEM_PTR+2 |
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.equ SHELL_CMD_ARGS SHELL_MEM_PTR+2 |
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; Command buffer. We read types chars into this buffer until return is pressed |
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; This buffer is null-terminated and we don't keep an index around: we look |
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; for the null-termination every time we write to it. Simpler that way. |
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SHELL_BUF .equ SHELL_CMD_ARGS+SHELL_CMD_ARGS_MAXSIZE |
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.equ SHELL_BUF SHELL_CMD_ARGS+SHELL_CMD_ARGS_MAXSIZE |
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SHELL_RAMEND .equ SHELL_BUF+SHELL_BUFSIZE |
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.equ SHELL_RAMEND SHELL_BUF+SHELL_BUFSIZE |
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; *** CODE *** |
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shellInit: |
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@@ -178,8 +178,7 @@ shellParse: |
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; let's have DE point to the jump line |
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ld a, SHELL_CMD_ARGS_MAXSIZE |
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call addDE |
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ld ixh, d |
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ld ixl, e |
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push ix \ pop de |
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; Ready to roll! |
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call callIX |
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cp 0 |
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@@ -467,10 +466,7 @@ shellCall: |
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; 2. our A arg as the first byte of (HL) |
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; 2. our HL arg as (HL+1) and (HL+2) |
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; Ready, set, go! |
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ld a, (SHELL_MEM_PTR) |
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ld ixl, a |
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ld a, (SHELL_MEM_PTR+1) |
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ld ixh, a |
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ld ix, (SHELL_MEM_PTR) |
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ld a, (hl) |
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ex af, af' |
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inc hl |
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Virgil Dupras