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Allow Telnet65 to send ASCII code 0 - on the C64.

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Lars informed me that $F142 by default produces ASCII code 0 via Ctrl-@. One just needs a way to distinguish it from the no-key-press.

This means that the further processing can be done in that same as on the Apple II - meaning to just replace in the VT100 keyboard translation table $00 with $FF as code for ignore-key.
This commit is contained in:
Oliver Schmidt 2017-08-20 20:58:49 +02:00
parent 3541c20ba2
commit 9f611c5c1e
3 changed files with 65 additions and 68 deletions
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2
apps/telnet65.s
View File

@ -523,7 +523,7 @@ welcome_1: .byte 27,")0"
.byte 15,13,10
.byte 14,"x x"
.byte 15,13,10
.byte 14,"x",15,27,"[1m","Telnet65 v1.1",27,"[0m"," based on: ",14,"x"
.byte 14,"x",15,27,"[1m","Telnet65 v1.2",27,"[0m"," based on: ",14,"x"
.byte 15,13,10
.byte 14,"x x"
.byte 15,13,10,0

2
drivers/c64input.s
View File

@ -34,7 +34,9 @@ get_key:
; outputs: sec if key pressed, clear otherwise
; A contains ASCII value of key just pressed
get_key_if_available:
ldy #$ff
jsr $f142 ; not officially documented - where F13E (GETIN) falls through to if device # is 0 (KEYBD)
cpy #$ff ; Y gets modified iff there's a character available - this approach allows to read ^@ as 0
beq no_key
sec
rts

129
drivers/c64vt100.s
View File

@ -1052,22 +1052,16 @@ aDDigE rts
ProcOut
lda pta,y ; PETSCII to ASCII
beq POrts ; ignore key
cmp #$ff
beq StrKey ; send a string
beq POrts ; ignore key
cmp #$fe
beq POCmdKey ; command key
beq CmdKey ; command key
jsr putRS
POrts rts
; to far for branch
POCmdKey
jmp CmdKey
; -------------------------------------
; outgoing string
; outgoing command key
;
; params: key in y
; -------------------------------------
ScrsrU .byt $1b, $4f, $41, $00 ; esc O A
@ -1083,91 +1077,93 @@ Sf6 .byt $1b, $5b, $31, $37, $7e, $00 ; esc [ 1 7 ~
Sf7 .byt $1b, $5b, $31, $38, $7e, $00 ; esc [ 1 8 ~
Sf8 .byt $1b, $5b, $31, $39, $7e, $00 ; esc [ 1 9 ~
StrKey tya ; restore key
CmdKey tya ; restore character
; --- crsr U ---
K1 cmp #$91 ; test crsr U
bne K2
cmp #$91 ; test crsr U
bne C0
ldx #<ScrsrU
ldy #>ScrsrU
jsr SendStr
rts
; --- crsr L ---
K2 cmp #$9d ; test crsr L
bne K3
C0 cmp #$9d ; test crsr L
bne C1
ldx #<ScrsrL
ldy #>ScrsrL
jsr SendStr
rts
; --- f1 ---
K3 cmp #$85 ; test f1
bne K4
C1 cmp #$85 ; test f1
bne C2
ldx #<Sf1
ldy #>Sf1
jsr SendStr
rts
; --- f2 ---
K4 cmp #$89 ; test f2
bne K5
C2 cmp #$89 ; test f2
bne C3
ldx #<Sf2
ldy #>Sf2
jsr SendStr
rts
; --- f3 ---
K5 cmp #$86 ; test f3
bne K6
C3 cmp #$86 ; test f3
bne C4
ldx #<Sf3
ldy #>Sf3
jsr SendStr
rts
; --- f4 ---
K6 cmp #$8a ; test f4
bne K7
C4 cmp #$8a ; test f4
bne C5
ldx #<Sf4
ldy #>Sf4
jsr SendStr
rts
; --- f5 ---
K7 cmp #$87 ; test f5
bne K8
C5 cmp #$87 ; test f5
bne C6
ldx #<Sf5
ldy #>Sf5
jsr SendStr
rts
; --- f6 ---
K8 cmp #$8b ; test f6
bne K9
C6 cmp #$8b ; test f6
bne C7
ldx #<Sf6
ldy #>Sf6
jsr SendStr
rts
; --- f7 ---
K9 cmp #$88 ; test f7
bne K10
C7 cmp #$88 ; test f7
bne C8
ldx #<Sf7
ldy #>Sf7
jsr SendStr
rts
; --- f8 ---
K10 cmp #$8c ; test f8
bne K11
C8 cmp #$8c ; test f8
bne C9
ldx #<Sf8
ldy #>Sf8
jsr SendStr
K11 rts
; -------------------------------------
; outgoing command key
;
; -------------------------------------
CmdKey tya ; restore character
rts
; --- crsr R ---
; --- ^] ---
; both events send $1d
cmp #$1d
bne C0
C9 cmp #$1d
bne C10
lda #$04 ; test control Key
bit ControlFlags
beq crsrR ; not pressed
@ -1185,8 +1181,8 @@ crsrR ldx #<ScrsrR
; --- crsr D ---
; --- ^Q ---
; both events send char $11
C0 cmp #$11 ;^Q / crsr down
bne C2
C10 cmp #$11 ;^Q / crsr down
bne C11
lda #$04 ; test control Key
bit ControlFlags
beq crsrD ; not pressed
@ -1203,55 +1199,55 @@ crsrD ldx #<ScrsrD
; --- C=H ---
; print help
C2 cmp #$b4 ; C=H
bne C8
C11 cmp #$b4 ; C=H
bne C12
jmp Help
; --- HOME key ---
; --- ^S ---
; both events send char $13
C8 cmp #$13 ;^S / HOME
bne C9
C12 cmp #$13 ;^S / HOME
bne C13
lda #$04 ; test control Key
bit ControlFlags
beq C8Home ; not pressed
beq C12Home ; not pressed
; control S is pressed
tya ; send ^S
jsr putRS
rts
; send TAB
C8Home lda #$09
C12Home lda #$09
jsr putRS
rts
; --- HOME key ---
; --- ^T ---
; both events send char $14
C9 cmp #$14 ;^S / DEL
bne C10
C13 cmp #$14 ;^S / DEL
bne C14
lda #$04 ; test control Key
bit ControlFlags
beq C9Del ; not pressed
beq C13Del ; not pressed
; control T is pressed
tya ; send ^T
jsr putRS
rts
; send TAB
C9Del lda #$08
C13Del lda #$08
jsr putRS
rts
; --- C=Q ---
; quit CaTer
C10 cmp #$ab ; C=Q
bne C12
C14 cmp #$ab ; C=Q
bne C15
jsr telnet_close
rts
; --- unknown C=-Key ---
C12 rts
C15 rts
; -------------------------------------
; Help - print help screen
@ -2111,8 +2107,7 @@ atp ;_0 _1 _2 _3 _4 _5 _6 _7 _8 _9 _a _b _c _d _e _f
; input for sending over the serial
; line.
;
; ascii = $00 means ignore key
; ascii = $ff menas send string
; ascii = $ff means ignore key
; ascii = $fe means do something
; complicated (command key)
; -------------------------------------
@ -2121,7 +2116,7 @@ pta ;_0 _1 _2 _3 _4 _5 _6 _7 _8 _9 _a _b _c _d _e _f
; --- Control chars ------------------------------------------------
; {STOP} {RETURN}
; ^A ^B ^C ^D ^E ^F ^G ^H ^I ^J ^K ^L ^M ^N ^O
; ^@ ^A ^B ^C ^D ^E ^F ^G ^H ^I ^J ^K ^L ^M ^N ^O
.byt $00,$01,$02,$03,$04,$05,$06,$07,$08,$09,$0a,$0b,$0c,$0d,$0e,$0f ; 0_
; {crsr↓} {HOME|DEL} {crsr→}
; ^P ^Q ^R ^S ^T ^U ^V ^W ^X ^Y ^Z ^[ ^\£ ^] ^↑
@ -2142,24 +2137,24 @@ pta ;_0 _1 _2 _3 _4 _5 _6 _7 _8 _9 _a _b _c _d _e _f
.byt $70,$71,$72,$73,$74,$75,$76,$77,$78,$79,$7a,$5b,$5c,$5d,$5e,$1b ; 5_
; --- mirror of upper letters - should never appear ----------------
.byt $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00 ; 6_
.byt $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00 ; 7_
.byt $ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff ; 6_
.byt $ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff ; 7_
; --- upper control chars ------------------------------------------
; {f1}{f3}{f5}{f7}{f2}{f4}{f6}{f8}{ShRET}
;
.byt $00,$00,$00,$00,$00,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$00,$00,$00 ; 8_
.byt $ff,$ff,$ff,$ff,$ff,$fe,$fe,$fe,$fe,$fe,$fe,$fe,$fe,$ff,$ff,$ff ; 8_
; {crsr↑} {CLR}{INS} {crsr←}
; DEL
.byt $00,$ff,$00,$00,$7f,$00,$00,$00,$00,$00,$00,$00,$00,$ff,$00,$00 ; 9_
.byt $ff,$fe,$ff,$ff,$7f,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$fe,$ff,$ff ; 9_
; --- block graphics -----------------------------------------------
; ShSP C=K C=I C=T C=@ C=G C=+ C=M C=£ Sh£ C=N C=Q C=D C=Z C=S C=P
; |
.byt $00,$00,$00,$00,$00,$00,$00,$00,$00,$7c,$00,$fe,$00,$00,$00,$00 ; a_
.byt $ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$7c,$ff,$fe,$ff,$ff,$ff,$ff ; a_
; C=A C=E C=R C=W C=H C=J C=L C=Y C=U C=O Sh@ C=F C=C C=X C=V C=B
; `
.byt $00,$00,$00,$00,$fe,$00,$00,$00,$00,$00,$60,$00,$00,$00,$00,$00 ; b_
.byt $ff,$ff,$ff,$ff,$fe,$ff,$ff,$ff,$ff,$ff,$60,$ff,$ff,$ff,$ff,$ff ; b_
; --- capital letters ----------------------------------------------
; Sh* A B C D E F G H I J K L M N O
@ -2167,11 +2162,11 @@ pta ;_0 _1 _2 _3 _4 _5 _6 _7 _8 _9 _a _b _c _d _e _f
.byt $5f,$41,$42,$43,$44,$45,$46,$47,$48,$49,$4a,$4b,$4c,$4d,$4e,$4f ; c_
; P Q R S T U V W X Y Z Sh+ C=- Sh- π C=*
; / / / / / / / / / / / { } ~
.byt $50,$51,$52,$53,$54,$55,$56,$57,$58,$59,$5a,$7b,$00,$7d,$7e,$00 ; d_
.byt $50,$51,$52,$53,$54,$55,$56,$57,$58,$59,$5a,$7b,$ff,$7d,$7e,$ff ; d_
; --- mirror of block graphics - should never appear ---------------
.byt $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00 ; e_
.byt $00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00 ; f_
.byt $ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff ; e_
.byt $ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff,$ff ; f_
; --- Font ROM ------------------------