From 13067957c813b1d1c5ede4dd2556c45033398580 Mon Sep 17 00:00:00 2001
From: Robert Pengelly <robertapengelly@hotmail.com>
Date: Sat, 24 Aug 2024 16:17:56 +0100
Subject: [PATCH] Command manipulation

---
 build/chimaera.img          | Bin 368640 -> 368640 bytes
 build/chimaera.vhd          | Bin 34120704 -> 34120704 bytes
 src/apps/pcomm/pcomm.asm    | 308 +++++++++++++++++++++++++++++++++++-
 src/apps/pcomm/writestr.asm |   2 +
 4 files changed, 302 insertions(+), 8 deletions(-)

diff --git a/build/chimaera.img b/build/chimaera.img
index ca1e7c2b1534bd86815bb9fb55b163cdfb27ef9a..2b9ed57069b0832c5072abb226bc8f96c6baa676 100644
GIT binary patch
delta 3861
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delta 3528
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diff --git a/build/chimaera.vhd b/build/chimaera.vhd
index 14c5bb51022cb044e309923ec4537fa3451f094c..b1a091a2a30387274520016b98f9385bff3b2ed4 100644
GIT binary patch
delta 6704
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n4wcT_E7=f+wMhT(wedx9=~aI77Cl-uXmEUPssex6wn_d6kpZjY

delta 6062
zcma)<3s_WT{>RUp8JIaJI4B^3&dfm&#qn@a6A<%?THXdmLDVF*&DJiq3c8jn7?qB;
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za!97lnd7wm`nbPPk|qcv(lbY=kF@>9@fcxvmLLosGiubp(L-!l+Js>5gKs||L)g)8
zi%y)XTk(`BXw<!>`5vt(Err=^_m$=={dQ?M>%QX#-1a^1ZO7buTZ8wy|NFMTe&fMI
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z+`}yw-UyiOkJSXXoN#XO@x*#<o1(_qrCzPaN}5~osDe|QlA`uDN!B(-rD(6=_H)fC
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zhwsytSkK|1JAlEbJ6z=uu3l7@ps|Ggk5md6Zf-Njjdu33=cWJeh4)@}`e)ChH`FgI
zQvYrx7Q~zPP?~Lyl9rm+Ic-v&HBHHjOgQJ-lc}{wrD&zRQ<+*<wVzdr2`sVHqR_0C
z@9#{jlpub8NiDTXq2d>p)Jm&lZTm*Jrg&-{P7AwubwQ+7SmCisC1QI_>NPFjmP=(=
zU9-w^XR<b6vfiXtMoFEFCuC(YJLIV-DW-KFB`Kv(a<6WI0m3c(J_r^oEHTn-UG}nN
z%M7gr;S>E&3k4w~^4JnV*l2LSD+vC6&Xt0&UYev6gz1sfpB03}Hv8Tdgy$l+MdE1i
z&rU)3u~T}4Ak2%p`GFuj6T2W+5Dv#qJ}(H_cD1iv>YU>4qD=_)ew=?`0K44Lt_F4p
zv~{&Rn%yiBza}c{q8-|DGura@G`~_E7%N!@9*Wk@5ta_UJ^&Nhq3F3**U;<36YIUR
znXA@cDXok4PG+t>My;#Rc#Jz7S_+?p#A<fcMXS3_Qbd?Lrb_UB?D(l(JhaJmEK5s@
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zP~6?vg5n;GEg<f`*m$RJLT|?w5a)}{-2K7WPKEknGk5pJX6~M?EeQ3+_DXASZ0;am
zY&gXmo4LC~`-)|@#D@K{BDGI2cSl_I^0X?Ou-&`vooJDk9cc})Yk>j2iPzj+69cr8
z6O3qxsIE_tQd8=ZwE0GFLguzis7|??P@Qroq1}o@+va~yLc3IJBKp-n<!(Uxlm`Ra
zt=tz7Z!{52@9S5)@oSd-sxJP)fW`*<0;-Gm1ymQGtz9vD12Q!my#b}GjwC5o#2Mav
z>f#+*hVgDb*w1|W*To|r{IV9&gRUmAFR@pBn}l>sJ+(!C*q%FxzhnDV*Trjd{j`u{
zjY+QB^8Qt~gza?+6}OV4N`vlYwX%=2sa@7MS3@IyadR$PZ>q_^{Mcl5L9!HOc)XXk
zw_;tgv`{BLmaI-$V~SMGYfK&PY<&95osC|1cJ{u0XJ@4P^t~I7zS7-mzic^D+E?;k
z8@vv8uUYH6*1Iw9#+{8`Vs0v*-$8wRohe+Ll6GgqzoKK4N%CKGbdUrBKr7H11cD&Y
z2ADxGXbakb5D*H&Kzk4lI)Dfe2|9vKzyhqm24oNgI)i8s1G<1%&=qt8aiBY}gC0Nu
z@gM;tf+Wxr^a8!XL!b{x1}PvF^aW|4A9xt_2Lr%BFbE6=LqIwh3WkB<;1TdB7y(9t
zQD8I}0~{a&WCAA`3&w#gkPXIz954Y)1e3sHU^2)BkAo>-DwqbI0KWrIg6ZHX@Ov-=
zJPn=!&w}T`Oz=GT1DFM7gFKKA=7722k6<2n0lWz2gFk@<pa2wth2SMn1YQQOfLFmH
zuo$?&60j7!2L23+!Rufdcmw<eya|?rzk(G&1#f}3!8_n@;9am1tO6xqH7EsZz*?{l
zya)ac{sG<xAAmCOAy^MKfRDh(U?bQBHiIpo9Bc*KKn17-RbV@)20OqfU?<oGYQS!=
z2h@VSU?12I>c9c;DL4oYfzN;&d=3tSBjBH)9{dX&1z&(;;7f2Ed<9N`li(EiH)sH-
z!5Q#1I19c3=fHo!x8OUV0S`D28o~GA0{8*^2>uH$f}g-8@H4m!u7IoH8u$fV2RA?y
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z0~J9<QXQ#Il!dZVHcF<VsLoV06+?BQVyUiFH!6<mPT8p*ltRT*2~;ALMD?V4QN5{$
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zspqJf)brFIs9Dr(Dv!#i=1_B~KT`9k7pNDh`P84N1yli5NG+sZqKc@OsaL31sYTRc
z%0(@qmQt@#f2NA5*QsUH8`NK@H>u^+U#S(8O1(wBO}#_?je3__Nv)zvsMS;{wT4<t
zt)t$f{!aaadY}4$Dx*H6)>9j(kEoBSjnpP;Gqr^(r?yhts0yl*s-m`2)zl8^6KW^5
zi>je^Q+uddYA>~q+E3L{2dGb}gVZ7FGs;bUP93I>Q2(Ursee&NsV}Hw)R)w8>MQC5
zb&@(o{hMl_PE%*7uc@=tH`F=mKh(F>ca%nXsPj}K^*wcg`hoh9`Y&~n`iZ(k{Y+h^
zu25I0Yt%2)b?OGyL^V@4saraH{zR<kD3Q`r2Fj1}r;Oq*eEvjx?iRE7oNm<`lh{E&
lapa379kJG>t!H0W&<lRfCufF7C5f|!=RZFc|KzRL{SQ>C-6;S7

diff --git a/src/apps/pcomm/pcomm.asm b/src/apps/pcomm/pcomm.asm
index 81272c8..7dfad70 100644
--- a/src/apps/pcomm/pcomm.asm
+++ b/src/apps/pcomm/pcomm.asm
@@ -96,18 +96,27 @@ _main:
     mov     ah,     HEX (08)
     int     HEX (21)
     
+    cmp     al,     HEX (47)
+    je      .L74
+    
     cmp     al,     HEX (48)
     je      .L1
     
     cmp     al,     HEX (4B)
-    je      .L4
+    je      .L57
+    
+    cmp     al,     HEX (4D)
+    je      .L58
     
-    ;cmp     al,     HEX (4D)
-    ;je      .L58
+    cmp     al,     HEX (4F)
+    je      .L75
     
     cmp     al,     HEX (50)
     je      .L2
     
+    cmp     al,     HEX (53)
+    je      .L71
+    
     jmp     .L11
 
 .L10:
@@ -552,13 +561,101 @@ _main:
     cmp     al,     HEX (7F)
     ja      .L11
     
-    mov     ah,     HEX (02)
-    mov     dl,     al
-    int     HEX (21)
+    push    ax
+    push    bx
+    push    cx
+    push    dx
+    push    si
+    push    di
+    push    ax
+    
+    mov     bx,     offset _scratch
+    
+    mov     ax,     di
+    sub     ax,     bx
+    
+    mov     cl,     ch
+    xor     ch,     ch
+    
+    cmp     ax,     cx
+    je      .L68
+    
+    push    cx
     
+    mov     si,     offset _scratch
+    mov     di,     offset _temp
+    
+    push    ax
+    push    cx
+    
+    mov     cx,     ax
+    rep     movsb
+    
+    xor     al,     al
     stosb
+    
+    pop     cx
+    pop     ax
+    
+    sub     cx,     ax
+    rep     movsb
+    
+    xor     al,     al
+    stosb
+    
+    pop     cx
+    inc     cx
+    
+    mov     si,     offset _temp
+    mov     di,     offset _scratch
+    
+    rep     movsb
+
+.L68:
+
+    pop     ax
+    pop     di
+
+.L69:
+
+    stosb
+    
+    mov     ax,     HEX (0300)
+    xor     bx,     bx
+    int     HEX (10)
+    
+    mov     bx,     di
+    dec     bx
+    
+    call    _writestr
+    
+    cmp     dl,     HEX (4F)
+    jb      .L73
+    
+    xor     dl,     dl
+    inc     dh
+    
+    jmp     .L70
+
+.L73:
+
+    add     dl,     1
+
+.L70:
+
+    mov     ax,     HEX (0200)
+    xor     bx,     bx
+    int     HEX (10)
+    
+    pop     si
+    pop     dx
+    
+    pop     cx
     inc     ch
     
+    pop     bx
+    pop     ax
+    
     jmp     .L11
 
 .L58:
@@ -658,8 +755,141 @@ _main:
 
 .L4:
 
-    call _handle_backspace
-    jmp  .L11
+    cmp     di,     offset _scratch
+    je      .L11
+    
+    push    es
+    push    ds
+    push    ax
+    push    bx
+    push    cx
+    push    dx
+    push    si
+    push    di
+    
+    mov     bx,     offset _scratch
+    
+    mov     ax,     di
+    sub     ax,     bx
+    
+    mov     cl,     ch
+    xor     ch,     ch
+    
+    mov     si,     di
+    dec     di
+    
+    sub     cx,     ax
+    rep     movsb
+    
+    xor     al,     al
+    stosb
+    
+    call    _erase_char
+    pop     di
+    dec     di
+    
+    mov     ax,     HEX (0300)
+    xor     bx,     bx
+    int     HEX (10)
+    
+    mov     cx,     dx
+    
+    mov     bx,     di
+    call    _writestr
+    
+    mov     ah,     HEX (02)
+    xor     dl,     dl
+    int     HEX (21)
+    
+    mov     dx,     cx
+    
+    mov     ax,     HEX (0200)
+    xor     bx,     bx
+    int     HEX (10)
+    
+    pop     si
+    pop     dx
+    
+    pop     cx
+    dec     ch
+    
+    pop     bx
+    pop     ax
+    pop     ds
+    pop     es
+    
+    jmp     .L11
+
+.L71:
+
+    push    ax
+    push    bx
+    push    cx
+    push    dx
+    push    si
+    push    di
+    
+    mov     bx,     offset _scratch
+    
+    mov     ax,     di
+    sub     ax,     bx
+    
+    mov     cl,     ch
+    xor     ch,     ch
+    
+    cmp     ax,     cx
+    je      .L72
+    
+    mov     si,     di
+    inc     si
+    
+    sub     cx,     ax
+    rep     movsb
+    
+    xor     al,     al
+    stosb
+    
+    pop     di
+    
+    mov     ax,     HEX (0300)
+    xor     bx,     bx
+    int     HEX (10)
+    
+    mov     cx,     dx
+    
+    mov     bx,     di
+    call    _writestr
+    
+    mov     ah,     HEX (02)
+    xor     dl,     dl
+    int     HEX (21)
+    
+    mov     dx,     cx
+    
+    mov     ax,     HEX (0200)
+    xor     bx,     bx
+    int     HEX (10)
+    
+    pop     si
+    pop     dx
+    
+    pop     cx
+    dec     ch
+    
+    pop     bx
+    pop     ax
+    
+    jmp     .L11
+
+.L72:
+
+    pop     si
+    pop     dx
+    pop     cx
+    pop     bx
+    pop     ax
+    
+    jmp     .L11
 
 .L3:
 
@@ -1053,6 +1283,68 @@ _main:
     call    _history_down
     jmp     .L11
 
+.L75:
+
+    and     ch,     ch
+    jz      .L11
+    
+    push    ax
+    push    bx
+    push    cx
+    push    dx
+    
+    xor     ah,     ah
+    mov     al,     cs:[_curr_col]
+    
+    xor     dx,     dx
+    
+    mov     cl,     ch
+    xor     ch,     ch
+    
+    add     ax,     cx
+    
+    mov     di,     offset _scratch
+    add     di,     cx
+    
+    mov     cx,     80
+    div     cx
+    
+    mov     dh,     cs:[_curr_row]
+    add     dh,     al
+    
+    mov     ax,     HEX (0200)
+    xor     bx,     bx
+    int     HEX (10)
+    
+    pop     dx
+    pop     cx
+    pop     bx
+    pop     ax
+    
+    jmp     .L11
+
+.L74:
+
+    push    ax
+    push    bx
+    push    cx
+    push    dx
+    
+    mov     dh,     cs:[_curr_row]
+    mov     dl,     cs:[_curr_col]
+    
+    mov     ax,     HEX (0200)
+    xor     bx,     bx
+    int     HEX (10)
+    
+    mov     di,     offset _scratch
+    pop     dx
+    pop     cx
+    pop     bx
+    pop     ax
+    
+    jmp     .L11
+
 ;******************************************************************************
 ; @function         _format_path
 ;******************************************************************************
diff --git a/src/apps/pcomm/writestr.asm b/src/apps/pcomm/writestr.asm
index 161b82e..64cc800 100644
--- a/src/apps/pcomm/writestr.asm
+++ b/src/apps/pcomm/writestr.asm
@@ -16,6 +16,7 @@ _writestr:
     ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
     push    ax
     push    bx
+    push    dx
     push    si
     push    bp
     
@@ -66,6 +67,7 @@ _writestr.done:
     ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
     pop     bp
     pop     si
+    pop     dx
     pop     bx
     pop     ax
     
-- 
2.34.1