mirror of
https://github.com/forth-ev/VolksForth.git
synced 2024-07-02 01:29:31 +00:00
375 lines
23 KiB
Forth
375 lines
23 KiB
Forth
\ *** Block No. 0 Hexblock 0
|
|
\ Serial interface for IBM-PC using 8250 chip cas 11nov05
|
|
|
|
INCLUDE SERIAL.FB will load code for COM1,
|
|
2 LOADFROM SERIAL.FB for COM2
|
|
|
|
Bytes recieved will be buffered in a 128 Byte deep Queue
|
|
by an interrupt Routine.
|
|
|
|
The DTR Line will be used to signal that new bytes can be
|
|
recieved.
|
|
The Sender will recognize CTS, a full Handshake is implemented
|
|
|
|
Xon/Xoff Protocoll using ^S/^Q is _not_ implemented.
|
|
|
|
Sender: TX? ( -- f ) TX ( -- char )
|
|
Empf„nger: RX? ( -- f ) RX ( char -- )
|
|
\ *** Block No. 1 Hexblock 1
|
|
\ Driver for IBM-PC Serial card using 8250 cas 11nov05
|
|
Onlyforth \needs Assembler 2 loadfrom asm.fb
|
|
|
|
cr .( COM1: )
|
|
|
|
| $C 4 * Constant SINT@ \ absolute loc. of serial interrupt
|
|
|
|
$3F8 >label Portadr
|
|
|
|
| $10 Constant I_level \ 8259 priority
|
|
|
|
2 7 +thru
|
|
|
|
|
|
|
|
|
|
\ *** Block No. 2 Hexblock 2
|
|
\ Driver for IBM-PC Serial card using 8250 cas 11nov05
|
|
Onlyforth \needs Assembler 2 loadfrom asm.fb
|
|
|
|
cr .( COM2: )
|
|
|
|
| $B 4 * Constant SINT@ \ absolute loc. of serial interrupt
|
|
|
|
$2F8 >label Portadr
|
|
|
|
| 8 Constant I_level \ 8259 priority
|
|
|
|
1 6 +thru
|
|
|
|
|
|
|
|
|
|
\ *** Block No. 3 Hexblock 3
|
|
\ Driver for IBM-PC Serial card using 8250 ks 11 mai 88
|
|
\ 3 .( 38.4 kbaud )
|
|
\ &6 .( 19.2 kbaud )
|
|
&12 .( 9.6 kbaud )
|
|
\ &24 .( 4.8 kbaud )
|
|
\ &96 .( 1200 baud )
|
|
>label baud
|
|
|
|
$20 >label I_ctrl $21 >label I_mask \ 8259 addresses
|
|
|
|
Create Queue 0 , $80 allot
|
|
\ 0 1 2 130 byte address
|
|
\ | len | out |<-- 128 byte Queue -->|
|
|
\ len ::= number of characters queued
|
|
\ out ::= relativ address of next output character
|
|
\ (len+out)mod(128) ::= relative address of first empty byte
|
|
\ *** Block No. 4 Hexblock 4
|
|
\ transmit to 8250 ks 11 dez 87
|
|
|
|
Code tx? ( -- f ) D push Portadr 5 + # D mov
|
|
D in D D xor $1020 # A and $1020 # A cmp
|
|
0= ?[ D dec ]? Next end-code
|
|
|
|
Code tx ( c -- ) D- A- xchg Portadr # D mov
|
|
D byte out D pop Next end-code
|
|
|
|
Code -dtr D push Portadr 4 + # D mov
|
|
D byte in $1E # A- and D byte out D pop Next
|
|
end-code
|
|
|
|
Code +dtr D push Portadr 4 + # D mov
|
|
D byte in 1 # A- or D byte out D pop Next
|
|
end-code
|
|
\ *** Block No. 5 Hexblock 5
|
|
\ receive queue and interrupt service routine ks 11 dez 87
|
|
|
|
Label S_INT D push I push A push
|
|
Portadr # D mov D byte in A- D+ mov
|
|
Queue # I mov C: seg I ) A mov A- D- mov D- inc
|
|
C: seg D- I ) mov A+ A- add $7F # A and A I add
|
|
C: seg D+ 2 I D) mov $68 # D- cmp CS not
|
|
?[ Portadr 4 + # D mov
|
|
D byte in $1E # A- and D byte out ]? \ -DTR
|
|
$20 # A- mov I_ctrl #) byte out \ EOI for 8259
|
|
A pop I pop D pop iret
|
|
end-code
|
|
|
|
|
|
|
|
|
|
\ *** Block No. 6 Hexblock 6
|
|
\ rx? rx ks 30 dez 87
|
|
|
|
Code rx? ( -- f ) D push D D xor
|
|
Queue #) D- mov D- D- or 0=
|
|
?[ [[ D push Portadr 4 + # D mov \ +DTR
|
|
D byte in 9 # A- or D byte out D pop
|
|
swap ]? Next end-code
|
|
|
|
Code rx ( -- 8b ) I W mov Queue # I mov
|
|
D push D D xor cli lods A- A- or 0= not
|
|
?[ A+ C- mov A- dec A+ inc $7F # A+ and
|
|
A -2 I D) mov D- C+ mov C I add I ) D- mov
|
|
]? sti W I mov $18 # A- cmp CS not ?] Next
|
|
end-code
|
|
|
|
|
|
\ *** Block No. 7 Hexblock 7
|
|
\ Serial initialization ks 25 apr 86
|
|
|
|
| Code S_init D push D: push A A xor A D: mov C: A mov
|
|
SINT@ # W mov S_INT # W ) mov A 2 W D) mov D: pop
|
|
Portadr 3 + # D mov $80 # A- mov D byte out \ DLAB = 1
|
|
2 # D sub baud # A mov A- A+ xchg D byte out
|
|
D dec A- A+ xchg D byte out \ baudrate
|
|
3 # D add $A07 # A mov D out \ 8bit, noP, +RTS +OUT
|
|
2 # D sub 1 # A- mov D byte out \ +rxINT
|
|
I_mask #) byte in I_level Forth not Assembler # A- and
|
|
I_mask #) byte out D pop Next
|
|
end-code
|
|
|
|
|
|
|
|
|
|
\ *** Block No. 8 Hexblock 8
|
|
\ init bye ks 11 dez 87
|
|
\needs init : init ;
|
|
|
|
: init init Queue off S_init ; init
|
|
|
|
: bye 0 [ Portadr 1+ ] Literal pc! \ -rxINT
|
|
0 [ Portadr 4 + ] Literal pc! \ -dtr/-rts/-out2
|
|
I_mask pc@ I_level or I_mask pc! bye ;
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
\ *** Block No. 9 Hexblock 9
|
|
\ dumb terminal via 8250 ks 11 dez 87
|
|
|
|
Variable Fkeys Fkeys on
|
|
|
|
| : ?rx ( -- ) pause rx? 0=exit rx
|
|
Fkeys @ 0= IF emit ?cr exit THEN
|
|
#LF case? IF cr exit THEN
|
|
#CR case? IF Row 0 at exit THEN
|
|
#BS case? IF del exit THEN emit ;
|
|
|
|
| : ?tx ( c -- ) BEGIN ?rx tx? UNTIL tx ;
|
|
|
|
: dumb BEGIN BEGIN ?rx key? UNTIL key
|
|
$1B case? IF -dtr exit THEN ?tx REPEAT ;
|
|
|
|
|
|
\ *** Block No. 10 Hexblock A
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
\ *** Block No. 11 Hexblock B
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
\ *** Block No. 12 Hexblock C
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
\ *** Block No. 13 Hexblock D
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
\ *** Block No. 14 Hexblock E
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
\ *** Block No. 15 Hexblock F
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
\ *** Block No. 16 Hexblock 10
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
\ *** Block No. 17 Hexblock 11
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
\ *** Block No. 18 Hexblock 12
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
\ *** Block No. 19 Hexblock 13
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
\ *** Block No. 20 Hexblock 14
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
\ *** Block No. 21 Hexblock 15
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|