+++ /dev/null
- page 200\r
-\r
-\r
- extrn buf.init\r
- extrn isv_sw\r
-\r
- \r
- global ser.init\r
- global ser.instat,ser.in\r
- global ser.out\r
-\r
-;TODO: define a trampoline area somewhere in top ram. \r
-rtxisvjmp equ 0FF60h ;momentan frei...\r
-\r
- include config.inc\r
- include z180reg.inc\r
-\r
-\r
-;-----------------------------------------------------\r
-\r
- dseg\r
- \r
-buf_start:\r
- mkbuf ser1.inbuf,s1.rx_len\r
- mkbuf ser1.outbuf,s1.tx_len\r
-buf_end:\r
-\r
-\r
-\r
-;-----------------------------------------------------\r
-\r
- cseg\r
-;\r
-; Init Serial I/O for console input and output (ASCI1)\r
-;\r
- \r
-\r
-ser.init:\r
-; ld a,i\r
-; push af ;save IFF\r
-; di\r
-\r
- xor a ;\r
- out0 (stat1),a ;Disable rx/tx interrupts\r
- \r
- ld hl,rxtx_src ;move rx and tx isv to common ram\r
- ld de,rxtx_dst ;\r
- ld bc,rxtx_src_e-rxtx_src ; \r
- ldir ;\r
-\r
- ld hl,rtxisvjmp ;rx/tx int vector\r
- ld (ivtab + IV$ASCI1),hl;\r
- ld a,0cdh ;\r
- ld (rtxisvjmp),a ;\r
- ld hl,isv_sw ;\r
- ld (rtxisvjmp + 1),hl ;\r
- ld hl,rxtxisv ;\r
- ld (rtxisvjmp + 3),hl ;\r
-\r
-; ASCI1: 8N1, highest baudrate (56700), CTS disabled\r
-\r
- ld a,M_MPBT \r
- out0 (cntlb1),a\r
- ld a,M_RE + M_TE + M_MOD2\r
- out0 (cntla1),a\r
- ld a,M_RIE\r
- out0 (stat1),a ;Enable rx interrupts\r
-\r
- ld ix,ser1.inbuf\r
- ld a,ser1.inbuf.mask\r
- call buf.init\r
- ld ix,ser1.outbuf\r
- ld a,ser1.outbuf.mask\r
- call buf.init\r
-\r
-; pop af\r
-; ret po\r
-; ei\r
- ret ;\r
-\r
-ser.instat:\r
- push ix\r
- ld ix,ser1.inbuf ;\r
-\r
-buf.empty:\r
- ld a,(ix+o.in_idx) ;\r
- sub (ix+o.out_idx) ;\r
- pop ix\r
- ret z\r
- or 0ffh\r
- ret\r
- \r
-ser.in:\r
- push hl ;11 \r
- push de ;11\r
- ld hl,ser1.inbuf-1 ; 9 hl = &rx.out_idx \r
- ld a,(hl) ; 6 a = rx.out_idx\r
- dec hl ; 4 hl = &rx.in_idx\r
- jr bg.w1\r
-bg.wait:\r
- halt\r
-bg.w1:\r
- cp (hl) ; 6 while (out_idx==in_idx) \r
- jr z,bg.wait ; 6 (/8) ;\r
-\r
- inc a ; 4\r
- ld e,a ; 4 \r
- inc e ; 4\r
- ld d,0 ; 6\r
-\r
- ex de,hl ; 3\r
- add hl,de ;10\r
- ld l,(hl) ; 6\r
- ex de,hl ; 3 \r
- \r
- dec hl ; 4\r
- and (hl) ; 6 \r
- inc hl ; 4\r
- inc hl ; 4\r
- ld (hl),a ; 7\r
- \r
- ld a,e ; 4\r
- pop de ; 9\r
- pop hl ; 9\r
- ret ; 9\r
- ; 153 \r
-\r
-ser.outstat:\r
- push ix\r
- ld ix,ser1.outbuf ;\r
-buf.full:\r
- ld a,(ix+o.in_idx) ;\r
- inc a\r
- and (ix+o.mask)\r
- sub (ix+o.out_idx) ;\r
- pop ix\r
- ret z\r
- or 0ffh\r
- ret\r
-\r
-\r
-ser.out:\r
- push ix\r
- ld ix,ser1.outbuf ;\r
-buf.put:\r
- push hl ;\r
- push bc\r
- push ix\r
- pop hl\r
- ld c,(ix+o.in_idx) ;\r
- ld b,0\r
- add hl,bc\r
- ld b,a\r
-\r
- ld a,c ;\r
- inc a\r
- and (ix+o.mask)\r
-bp.wait:\r
- cp (ix+o.out_idx) ;\r
- jr z,bp.wait\r
- ld (hl),b\r
- ld (ix+o.in_idx),a\r
-\r
- di ;036f\r
- in0 a,(stat1) ;0374\r
- set TIE,a ;0377\r
- out0 (stat1),a ;0379\r
- ei ;037c\r
-\r
- ld a,b\r
- pop bc\r
- pop hl\r
- pop ix\r
- ret\r
-\r
-\r
-;------------------------------------------\r
-; ASCI 1 Transmit/Receive interupt routines\r
-; moved to common ram\r
-\r
-rxtx_src:\r
- dseg\r
-rxtx_dst: ; (0c097h) old\r
-\r
-rxtxisv:\r
- inidat\r
- in0 a,(stat1) ;receive flag set?\r
- jp p,txisv ;\r
-\r
- in0 d,(rdr1) ;todo: break detection\r
- bit FE,a ;framing error?\r
- jr nz,??ri_1\r
- \r
- push ix\r
- ld ix,ser1.inbuf ;\r
- ld hl,ser1.inbuf ;\r
- ld c,(ix+o.in_idx) ;\r
- ld b,0\r
- add hl,bc\r
-\r
- ld a,c ;\r
- inc a\r
- and (ix+o.mask)\r
- cp (ix+o.out_idx) ;\r
- jr z,??ri_0\r
- ld (hl),d\r
- ld (ix+o.in_idx),a\r
-??ri_0:\r
- pop ix\r
-??ri_1:\r
- in0 a,(cntla1) ;0705 c0c0\r
- res EFR,a ;0708\r
- out0 (cntla1),a ;070a\r
- ret\r
-\r
- inidate\r
-\r
-txisv:\r
- inidat\r
- push ix\r
- ld ix,ser1.outbuf ;\r
-\r
- ld a,(ix+o.out_idx) ;\r
- cp (ix+o.in_idx) ;\r
- jr z,??ti_2\r
-\r
- ld hl,ser1.outbuf ;\r
- add a,l\r
- ld l,a\r
- jr nc,??ti_1\r
- inc h\r
-??ti_1:\r
- ld l,(hl)\r
- out0 (tdr1),l ;071b\r
- \r
- ld a,(ix+o.out_idx) ;\r
- inc a\r
- and (ix+o.mask)\r
- ld (ix+o.out_idx),a\r
- jr ??ti_3\r
-??ti_2:\r
- in0 a,(stat1) ;0730 disable tx-int\r
- res TIE,a ;0733\r
- out0 (stat1),a ;0735\r
-??ti_3:\r
- pop ix\r
- ret\r
-\r
- inidate\r
-\r
- cseg\r
-rxtx_src_e:\r
-\r
-\r
- end\r
-\r
-\r
projects / z180-stamp.git / blobdiff