91 lines
1.2 KiB
NASM
91 lines
1.2 KiB
NASM
; Commands and utils related to displaying or editing memory or registers
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cmd_r: cmp byte [si], 0
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je printregs
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call eat_register
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jc .err
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mov al, [cs:bx+rnames]
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call putc
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mov al, [cs:bx+rnames+1]
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call putc
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call space
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call edit_word
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call crlf
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ret
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.err: mov di, eat_register.emsg
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jmp parse_error
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printregs:
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mov cx, 13
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xor bx, bx
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mov ah, 0x0e
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mov si, reg_ax
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.loop: push cx
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mov dx, [cs:si+rnames]
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lodsw
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call printreg
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pop cx
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loop .loop
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mov dx, [reg_fl]
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mov si, fnames
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mov cx, 16
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.floop: mov al, [cs:si]
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inc si
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cmp al, '+'
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je .fskip
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test dx, 0x8000
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jnz .fprnt
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mov al, '-'
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.fprnt: int 0x10
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.fskip: shl dx, 1
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loop .floop
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call space
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push ds
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mov ds, [es:reg_cs]
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mov si, [es:reg_ip]
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call disasm
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pop ds
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call crlf
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ret
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printreg:
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push ax
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mov al, dl
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call putc
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mov al, dh
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call putc
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mov al, '='
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call putc
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pop dx
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call print_dx
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call space
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ret
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; let the user edit the word at ES:BX
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edit_word:
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push bx
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mov dx, [es:bx]
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call print_dx
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mov al, '.'
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call putc
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mov byte [inmin], 4
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mov byte [inmax], 4
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mov word [ingetc], getch
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call gets
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pop bx
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jc .ret
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mov si, inbuf
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call eat_hex_word
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jc .err
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mov [es:bx], dx
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.ret: ret
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.err: call crlf
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mov di, eat_hex_word.emsg
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jmp parse_error
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