projects / z180-stamp-cpm3.git / blame
| Commit | Line | Data |
|---|---|---|
| 6dd88c25 L |
1 | \r |
| 2 | public as_init\r | |
| 3 | \r | |
| 4 | extrn ioiniml\r | |
| 5 | extrn f_cpu,add_hla,div32_r\r | |
| 6 | extrn @ctbl\r | |
| 7 | \r | |
| 3c56f4c2 L |
8 | maclib z180reg.inc\r |
| 9 | maclib config.inc\r | |
| 6dd88c25 L |
10 | \r |
| 11 | \r | |
| 12 | ;--------------------------------------------------------------\r | |
| 13 | ; TC = (f PHI /(2*baudrate*Clock_mode)) - 2\r | |
| 14 | ;\r | |
| 15 | ; Clock_mode == 16\r | |
| 16 | ; TC = (f PHI / (32 * baudrate)) - 2\r | |
| 17 | ;\r | |
| 18 | ; br150 = baudrate/150\r | |
| 19 | ; TC = (f PHI / (32 * 150 * br150)) - 2\r | |
| 20 | ; TC = (f PHI / (32 * 150 * br150)) - 2\r | |
| 21 | \r | |
| 22 | \r | |
| 23 | ;--------------------------------------------------------------\r | |
| 24 | ; Init Serial I/O for console input and output (ASCI1)\r | |
| 25 | ;\r | |
| 26 | ; b: device number (0..15)\r | |
| 27 | ; c: asci channel number (0/1)\r | |
| 28 | \r | |
| 29 | dseg\r | |
| 30 | as_init:\r | |
| 31 | ld de,initab0\r | |
| 32 | dec c\r | |
| 33 | jr nz,$+5\r | |
| 34 | ld de,initab1\r | |
| 35 | \r | |
| 36 | ld c,8 ;\r | |
| 37 | mlt bc ;\r | |
| 38 | ld hl,@ctbl+7 ;get baudrate index\r | |
| 39 | add hl,bc ;\r | |
| 40 | ld a,(hl)\r | |
| 41 | call as_br_div\r | |
| 42 | ld b,h\r | |
| 43 | ld c,l\r | |
| 44 | ld hl,init_br_off\r | |
| 45 | add hl,de\r | |
| 46 | ld (hl),c\r | |
| 47 | inc hl\r | |
| 48 | ld (hl),b\r | |
| 49 | ex de,hl\r | |
| 50 | jp ioiniml\r | |
| 51 | \r | |
| 52 | \r | |
| 53 | as_br_div:\r | |
| 54 | push de\r | |
| 55 | push bc\r | |
| 56 | and 0fh\r | |
| 57 | add a,a ;get factor\r | |
| 58 | ld hl,bd150_tab\r | |
| 59 | call add_hla\r | |
| 60 | ld c,(hl)\r | |
| 61 | inc hl\r | |
| 62 | ld b,(hl)\r | |
| 63 | ld hl,(f_cpu)\r | |
| 64 | ld de,(f_cpu+2)\r | |
| 65 | call div32_r\r | |
| 66 | ld bc,32*150\r | |
| 67 | call div32_r\r | |
| 68 | ld de,2\r | |
| 69 | or a\r | |
| 70 | sbc hl,de\r | |
| 71 | pop bc\r | |
| 72 | pop de\r | |
| 73 | ret nc\r | |
| 74 | ld hl,0\r | |
| 75 | ret\r | |
| 76 | \r | |
| 77 | bd150_tab:\r | |
| 78 | ; factor index baudrate orig. cp/m\r | |
| 79 | dw 19200/150 ; 0 19200 -\r | |
| 80 | dw 28800/150 ; 1 28800 50\r | |
| 81 | dw 38400/150 ; 2 38400 75\r | |
| 82 | dw 57600/150 ; 3 57600 110\r | |
| 83 | dw 11520/15 ; 4 115200 134.5\r | |
| 84 | dw 150/150 ; 5 150\r | |
| 85 | dw 300/150 ; 6 300\r | |
| 86 | dw 600/150 ; 7 600\r | |
| 87 | dw 1200/150 ; 8 1200\r | |
| 88 | dw 1800/150 ; 9 1800\r | |
| 89 | dw 2400/150 ;10 2400\r | |
| 90 | dw 3600/150 ;11 3600\r | |
| 91 | dw 4800/150 ;12 4800\r | |
| 92 | dw 7200/150 ;13 7200\r | |
| 93 | dw 9600/150 ;14 9600\r | |
| 94 | dw 19200/150 ;15 19200\r | |
| 95 | \r | |
| 96 | \r | |
| 97 | \r | |
| 98 | \r | |
| 99 | initab0:\r | |
| 100 | db 1,stat0,0 ;Disable rx/tx interrupts\r | |
| 101 | ;Enable baud rate generator\r | |
| 102 | db 1,asext0,M_BRGMOD+M_DCD0DIS ; +M_CTS0DIS\r | |
| 103 | db 2,astc0l\r | |
| 104 | init_br_off equ $ - initab0\r | |
| 105 | dw 28\r | |
| 106 | db 1,cntlb0,M_MPBT ;No MP Mode, X16\r | |
| 107 | db 1,cntla0,M_RE+M_TE+M_MOD2 ;Rx/Tx enable, 8N1\r | |
| 108 | db 0\r | |
| 109 | \r | |
| 110 | initab1:\r | |
| 111 | db 1,stat1,0 ;Disable rx/tx ints, disable CTS1\r | |
| 112 | db 1,asext1,M_BRGMOD ;Enable baud rate generator\r | |
| 113 | db 2,astc1l,low 3, high 3\r | |
| 114 | db 1,cntlb1,M_MPBT ;No MP Mode, X16\r | |
| 115 | db 1,cntla1,M_RE+M_TE+M_MOD2 ;Rx/Tx enable, 8N1\r | |
| 116 | db 0\r | |
| 117 | \r | |
| 118 | end\r |