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- ; QT-QX10.Z - Epson QX-10 overlay source for QTERM
- ;
- ; Also uses a SIO, so this is based on the Kaypro overlay
-
- .var sioc 0x13 ; sio control port
- .var siod 0x11 ; sio data port
-
- .var rxrdy 1 ; receiver ready
- .var txrdy 4 ; transmitter ready
-
- .var yes 0xff ; true value
- .var no 0 ; false value
-
- .var brport 6 ; timer port for baudrate generator
- .var ctport 7 ; CTC control port
-
- .org 0x0110
- modist: in a,(sioc) ;get modem input status
- and rxrdy ; (result to Z: no inp. character available
- ret ; is 0 at bit-0 (low order) ===> Z==1 )
-
- .org 0x0120
- modin: in a,(siod) ;read modem input character
- ret
-
- .org 0x0130
- modost: in a,(sioc) ;get modem output status
- and txrdy ; (result to Z: bit-2 ... see above)
- ret
-
- .org 0x0140
- modout: out (siod),a ;write modem output char.
- ret
-
- .org 0x0150
- sbreak: ld a,(setf) ;start "break"
- or a ;do we have valid data in r3,r4,r5
- ret z ;no - don't do it
- ld hl,r5
- set 4,(hl) ; set the bit
- jp sioout ; and go do it
-
- .org 0x0160
- ebreak: ld a,(setf) ;end "break"
- or a
- ret z ; don't do it unless r3, r4, r5 are valid
- ld hl,r5
- res 4,(hl)
- jp sioout ; go clear the bit
-
- .org 0x0170
- dtroff: ld a,(setf) ;drop DTR
- or a
- ret z ; don't do it unless r3, r4, r5 are valid
- ld hl,r5
- res 7,(hl)
- jp sioout
-
- .org 0x0180
- dtron: ld a,(setf) ;raise DTR
- or a
- ret z ; don't do it unless r3, r4, r5 are valid
- ld hl,r5
- set 7,(hl)
- jp sioout
-
- .org 0x0190
- setbd: ld l,a ; index to l
- ld h,0
- ld de,bdval ; table address
- add hl,de ; point at word
- jp finbd ; and finish the setting
-
- ; The Baud Rate Table has entries from 38400 baud down to 300 baud.
- ; There are 2 bytes per entry. The second byte determines if the entry is
- ; enabled or disabled (ffh=enabled; 00=disabled). The first byte is passed
- ; as the A value to the setbd subroutine.
-
- .org 0x01a0
-
- baudtb:
- b38400: db 0,no ; 38400 baud
- b19200: db 0,no ; 19200
- b9600: db 0,yes ; 9600
- b4800: db 2,yes ; 4800
- b2400: db 4,yes ; 2400
- b1200: db 6,yes ; 1200
- b600: db 8,yes ; 600
- b300: db 10,yes ; 300 baud
-
- ;.org 0x01b0 ; don't need this - table above is 16 bytes
- setmod: ld (setf),a ; flag we've done a set
- jp domod ; have to do this elsewhere
-
- ; Communication Mode Table. Single byte values for 12 combinations of
- ; number-of-bits(7/8), parity(none/even/odd), number-of-stop-bits(1/2).
-
- .org 0x1c0
-
- modetb:
- n17: db 0b10000000 ;0x80, 7n1
- n18: db 0b11000000 ;0xc0, 8n1
- n27: db 0b10001000 ;0x88, 7n2
- n28: db 0b11001000 ;0xc8, 8n2
- e17: db 0b10000011 ;0x83, 7e1
- e18: db 0b11000011 ;0xc3, 8e1
- e27: db 0b10001011 ;0x8b, 7e2
- e28: db 0b11001011 ;0xcb, 8e2
- o17: db 0b10000001 ;0x81, 7o1
- o18: db 0b11000001 ;0xc8, 8o1
- o27: db 0b10001001 ;0x89, 7o2
- o28: db 0b11001001 ;0xc9, 8o2
-
- ;.org 0x01cc ; don't need this - we're contiguous
- resrvd: db 0 ; reserved for future use
-
- ;.org 0x01cd
- xfersz: db 8 ;number of K to read/write during file xfers
- ;Must be 1 / 2 / 4 / 8. Best left as 8 unless
- ; disk is verrrrry slow. Drop to smaller value
- ; if too many timeouts occur during "protocol"
- ; file transfers (xmodem or kermit).
-
- ;.org 0x01ce
- speed: db 4 ;cpu speed (Mhz; use 3 for 2.5)
-
- ;.org 0x01cf
- escape: db '\e' ;escape character (1bh=^[ Escape)
-
- ;.org 0x01d0
- signon: ;signon message
- db 'Epson QX-10\0'
-
- .org 0x01f0
- clrs: db 'z' & 0x1f, 0 ;clear screen string (Control-Z)
-
- .var scrout 0x0109 ;(a routine to print to CON: the
- ; character in C)
- .var decout 0x010c ;(a routine to print to CON: a decimal value
- ; in HL. Is available for VT100 and the like.)
-
- .org 0x0200
- moveto: push hl ;move cursor to position in HL (Row,Col)
- ld c,'\e' ; lead-in with Esc (the ASCII one; not QTERM's)
- call scrout
- ld c,'=' ; 2nd lead-in is '='
- call scrout
- pop hl
- push hl
- ld a,h ; row value (top row is 0.)
- call poff ; add offset and send it to screen
- pop hl
- ld a,l ; col value (leftmost col is 0.)
- poff: add a,' ' ; (adds 20h)
- ld c,a
- jp scrout ; (scrout returns from 'moveto's call)
-
- ; Terminal Capability Bits. The eight bits stand for each of the following
- ; strings. They count from 01h=bright to 80h=clear-to-end-of-screen.
-
- .var b_brit 0b00000001 ; 0: bright (1.) -- NOT mandatory
- .var b_dim 0b00000010 ; 1: dim (2.) -- NOT mandatory
- .var b_dlln 0b00000100 ; 2: delete line (4.) -- important
- .var b_inln 0b00001000 ; 3: insert line (8.) -- important
- .var b_dlch 0b00010000 ; 4: delete character (16.)-- unused by QTERM
- .var b_inch 0b00100000 ; 5: insert character (32.)-- NOT mandatory
- .var b_clel 0b01000000 ; 6: clear to end-of-line(64.) -- important
- .var b_cles 0b10000000 ; 7: clear to end-of-screen(128.)-- important
-
- .org 0x022f
- tcbits: db 0b11001111 ; All are possible except insert & delete char
-
- ;.org 0x0230
- brites: db '\e(\0' ;bright string
-
- .org 0x0238
- dims: db '\e)\0' ;dim string
-
- .org 0x0240
- dlstr: db '\eR\0' ;delete line
-
- .org 0x0248
- ilstr: db '\eE\0' ;insert line
-
- .org 0x0250
- dcstr: db 0 ;delete character
-
- .org 0x0258
- icstr: db 0 ;insert character
-
- .org 0x0260
- ceol: db '\eT\0' ;clear to end of line
-
- .org 0x0268
- ceos: db '\ey\0' ;clear to end-of-screen
-
- ; Entry and Exit hooks. These are provided to perform custom initialisation
- ; on startup and on exit from QTERM. They are invoked before any use is made
- ; of the screen or the port hardware.
-
- .org 0x0270
- entry: jp do_ent ; entry hook (270h .. 272h)
-
- ;.org 0x0273 ; exit hook (273h .. 275h)
- exit: ret
-
- ; Extra patch area if needed. 276h .. 2ffh
-
- .org 0x0276
- patcha:
-
- do_ent:
- ld a,(b1200) ; entry hook (from 270h)
- call setbd ; set baud to 1200
- ld a,(n18) ; and 8n1 communications mode.
- call setmod
- ret
-
- domod: ld c,a ; save byte in c
- ld hl,r3 ; look at byte for wr3
- res 7,(hl) ; turn off ms bit (Rx # bits / char)
- add a,a ; move bit from 6 to 7 in a
- and 0x80 ; mask off the rest
- or (hl) ; or in the remainder
- ld (hl),a ; and save it back
- inc hl
- inc hl ; point hl at r4
- ld a,(hl)
- and 0xf4 ; mask out bits we don't want
- ld b,a ; save in b
- ld a,c ; get set byte back
- and 0x0b ; get bits out of set byte that we want
- or b ; or in the other bits
- ld (hl),a ; and save it back
- inc hl
- inc hl ; point hl at r5
- ld a,c
- and 0x40 ; get the bit we want from c
- res 6,(hl) ; clear the bit in r5
- or (hl)
- ld (hl),a ; put new composite value back
-
- sioout: ld hl,siodat
- ld bc,6 * 256 + sioc
- otir
- ret
-
- siodat: db 3
- r3: db 0b11000001 ; value for wr3 (0xc1)
- db 4
- r4: db 0b01000100 ; value for wr4 (0x44)
- db 5
- r5: db 0b11101010 ; value for wr5 (0xe5)
-
- setf: db 0 ; flag if we've done a set mode command
-
- finbd: ld a,0xb6 ; Set up square wave response, etc.
- out (ctport),a ; Send to 'CTC' timer
- ld a,(hl) ; LSP of baudrate
- out (brport),a
- inc hl
- ld a,(hl) ; MSP of baudrate
- out (brport),a
- ret
-
- bdval:
- bd9600: dw 13 ; 9600 bps value for CTC
- bd4800: dw 26 ; 4800 bps value for CTC
- bd2400: dw 52 ; 2400 bps value for CTC
- bd1200: dw 104 ; 1200 bps value for CTC
- bd600: dw 208 ; 600 bps value for CTC
- bd300: dw 416 ; 300 bps value for CTC