;
; COMMUNICATING WITH MODEM: PORTS & IRQ
;
; Compile with FASM for Menuet
;
include "lang.inc"
include "..\..\..\..\macros.inc"
use32
org 0x0
db 'MENUET01' ; 8 byte id
dd 0x01 ; header version
dd START ; start of code
dd I_END ; size of image
dd 0x1000 ; memory for app
dd 0x1000 ; esp
dd 0x0 , 0x0 ; I_Param , I_Icon
START: ; start of execution
mov eax,45 ; reserve irq 4
mov ebx,0
mov ecx,4
mcall
mov eax,46 ; reserve ports 0x3f8-0x3ff
mov ebx,0
mov ecx,0x3f8
mov edx,0x3ff
mcall
mov eax,44 ; read these ports at interrupt/irq 4
mov ebx,irqtable
mov ecx,4
mcall
mov eax,40 ; enable event for interrupt/irq 4
mov ebx,10000b shl 16 + 111b
mcall
call program_com1
mov eax, 48
mov ebx, 3
mov ecx, sc
mov edx, sizeof.system_colors
mcall
red:
call draw_window
still:
mov eax,10 ; wait here for event
mcall
cmp eax,1 ; redraw request ?
je red
cmp eax,2 ; key in buffer ?
je key
cmp eax,3 ; button in buffer ?
je button
cmp eax,16+4 ; data read by interrupt ?
je irq4
jmp still
key: ; key
mov eax,2 ; just read it and ignore
mcall
mov al,ah
mov dx,0x3f8
out dx,al
jmp still
button: ; button
or eax,-1 ; close this program
mcall
irq4:
mov eax,42
mov ebx,4
mcall
; eax = number of bytes left
; ecx = 0 success, =1 fail
; bl = byte
inc [pos]
and [pos],31
mov eax,[pos]
mov [string+eax], bl
call draw_string
jmp still
baudrate_9600 equ 12
baudrate_57600 equ 2
program_com1:
mov dx,0x3f8+3
mov al,0x80
out dx,al
mov dx,0x3f8+1
mov al,0x00
out dx,al
mov dx,0x3f8+0
mov al,baudrate_9600
out dx,al
mov dx,0x3f8+3
mov al,0x3
out dx,al
mov dx,0x3f8+4
mov al,0xb
out dx,al
mov dx,0x3f8+1
mov al,0x1
out dx,al
ret
; *********************************************
; ******* WINDOW DEFINITIONS AND DRAW ********
; *********************************************
draw_window:
mov eax, 12 ; function 12:tell os about windowdraw
mov ebx, 1 ; 1, start of draw
mcall
; DRAW WINDOW
mov eax, 0 ; function 0 : define and draw window
mov ebx, 100*65536+250 ; [x start] *65536 + [x size]
mov ecx, 100*65536+85 ; [y start] *65536 + [y size]
mov edx, [sc.work]
or edx, 0x03000000 ; color of work area RRGGBB,8->color gl
mcall
; WINDOW LABEL
mov eax, 4 ; function 4 : write text to window
mov ebx, 8*65536+8 ; [x start] *65536 + [y start]
mov ecx, [sc.grab_text]
or ecx, 0x10000000 ; font 1 & color ( 0xF0RRGGBB )
mov edx, title ; pointer to text beginning
mov esi, title.len ; text length
mcall
mov eax, 4 ; draw text
mov ebx, 20*65536+33
mov ecx, [sc.work_text]
mov edx, text+4
.nextstr:
mov esi, [edx-4]
test esi, 0xFF000000
jnz .finstr
mcall
add edx, esi
add edx, 4
add ebx, 10
jmp .nextstr
.finstr:
call draw_string
mov eax,12 ; function 12:tell os about windowdraw
mov ebx,2 ; 2, end of draw
mcall
ret
draw_string:
mov eax, 4
mov ebx, 20*65536+65
mov ecx, [sc.work_text]
mov edx, string
mov esi, 32
mcall
ret
; DATA AREA
if lang eq ru
text mstr "
.",\
"
",\
"
IRQ4
."
title:
db '
COM1'
.len = $ - title
else
text mstr "TYPED CHARACTERS ARE SENT TO MODEM.",\
"DATA FROM MODEM IS READ BY IRQ4",\
"INTERRUPT AND DISPLAYED BELOW."
title:
db 'MODEM AT COM1'
.len = $ - title
end if
pos dd 0x0
irqtable:
; port ; 1=byte, 2=word
dd 0x3f8 +0x01000000 ; read byte from port 0x3f8 at interrupt/irq 4
dd 0x0 ; no more ports ( max 15 ) to read
I_END:
string rb 32
sc system_colors