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97 lines
2.3 KiB
Plaintext
97 lines
2.3 KiB
Plaintext
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title ' Console Output Entry Module'
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;*******************************************
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; *
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; CONOUT MODULE *
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; Last changed : 2/11/84 *
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; *
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;*******************************************
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include chrcomm.equ
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include serdata.equ
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include vscreen.equ
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eject
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dseg
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extrn ocdesctbl:word
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extrn vccb_tbl:word ; in vs_screen.a86
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extrn oq0desc:byte
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extrn stoppoll:word ; in headentr.a86
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cseg
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public io_conout
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public pmsg
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public conout1
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extrn serial_out:near ; in serout.a86
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extrn supif:near ; in headentr.a86
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extrn vs_conout:near ; in vs_screen.a86
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;====
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pmsg:
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;====
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; print message on current console until 0ffh
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; input: BX = address of message
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push stoppoll
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mov stoppoll,0ffffh
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mov dl, 0 ; signon to console 0
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ploop:
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mov cl,[bx] ; get next char
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cmp cl,0ffh
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je pmsg_ret ; return if 0ffh
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; CL = character
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push dx ;save device number
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push bx ;save string ptr
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call io_conout ;display it
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pop bx ;regain <BX>
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pop dx ;console
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inc bx ;bump to next char
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jmps ploop ;loop till done
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pmsg_ret:
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pop stoppoll
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ret ; end of message
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;=========
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io_conout: ; Function 2: Console Output
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;=========
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;
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; input: CL = character
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; DL = virtual console number
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;
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; output: None
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;
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xor dh,dh
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jmp vs_conout ; for virtual screen buffering
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; omit this jump to disable buffering
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conout1:
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push dx ; save the Virtual con
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mov bx, dx
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shl bx, 1
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mov bx, vccb_tbl[bx] ; bx -> VCCB
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mov bl, vccb_pcon[bx] ; get the Physical console #
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xor bh, bh
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shl bx, 1
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mov bx, ocdesctbl[bx] ; bx -> Xmit Q control structure
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pop dx ; get the Vcon back
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cmp dl, CUR_VCON[bx]
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je co1 ; if background and dynamic,
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ret ; bit bucket the char
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co1:
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cmp cl, ESC ; Check for an escape character.
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jne co2 ; Worst case (VT-52) is 4 char's.
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mov OESC_CNT[bx], 4 ; init escape count
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co2:
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call serial_out
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ret
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end
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