Atari Portfolio as a Linux-Terminal

The terminalprogramm APTerm.com as a assembler program (apterm.dbg)

A 100

MOV AH,2        ; procedure: read keyboard

INT 16          ; Check if Shift left and right pressed

AND AL,03       ; clear bit 2-7

CMP AL,03       ; bit 0 high and bit 1 high ?

JE 130          ; jump to the end of the program

MOV AH,1        ; is a char available?

INT 16          ; 

JZ 11B          ; if no char available: goto 'read serial port'

MOV AH,0        ; if char available: get char (in AL)

INT 16

MOV AH,1        ; send char (from AL) to serial port

INT 14

JMP 100         ; goto 'read keyboard'

NOP

NOP

NOP

NOP



A 11B

MOV AH,2        ; procedure: read serial port

MOV DX,0        ; is a char in the serial port buffer ?

INT 14

ROL AH,1        ; if there is no char: goto 'read keyboard'

JB 100

MOV AH,0E       ; if there is a char: 

MOV BL,0        ; display it on the screen

INT 10

JMP 100         ; main loop

NOP

NOP

NOP

NOP

NOP



A130

MOV AH,4C       ; prepare return to DOS

INT 21

SBB BH,[SI]     ; Ctrl-Z, terminates the copy procedure

NOP             ; on the Atari Portfolio

NOP

NOP

NOP

NOP



N APTERM.COM

RCX

38

W

Q

DOS: Assemble it with:

debug < apterm.dbg

Hexdump of the terminalprogramm APTerm.com (52 Bytes)

Hexdump:
0100  B4 02 CD 16 24 03 3C 03-74 26 B4 01 CD 16 74 0B 
0110  B4 00 CD 16 B4 01 CD 14-EB E6 90 B4 02 BA 00 00 
0120  CD 14 D0 C4 72 DA B4 0E-B3 00 CD 10 EB D2 90 90
0130  B4 4C CD 21 1A 3C 90 90

File: apterm_d.htm Last update: Tue Apr 4 02:35:04 2000