mirror of
https://github.com/stevenhowes/wbios.git
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Steve Howes
111 lines
3.0 KiB
Plaintext
111 lines
3.0 KiB
Plaintext
;
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; initialization tables
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;
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; (C)1997-2001 Pascal Dornier / PC Engines; All rights reserved.
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; This file is licensed pursuant to the COMMON PUBLIC LICENSE 0.5.
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;
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;
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; Initial initialization table (used in post2)
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;
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clrtab: db cm_nmi+cm_b,cm_idx ;RTC: disable NMI
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db 2,cm_dat ;RTC: BCD mode, interrupt disable
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db cm_nmi+cm_a,cm_idx ;RTC: 32768 Hz oscillator, 1ms int
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db 26h,cm_dat
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db 4,dma0+8 ;disable dma0
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db 4,dma1+8+8 ;disable dma1
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db 0,dma0+0dh ;reset dma0 (data don't care)
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db 0,dma1+0dh+0dh ;reset dma1 (data don't care)
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db 0fh,dma0+0fh ;mask all channels
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db 0fh,dma1+0fh+0fh ;mask all channels
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db 0,dma0+8 ;Enable dma0
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db 0,dma1+8+8 ;Enable dma1
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db 0fch,port61 ;disable parity
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#if def NO_ISAREF
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db 50h,timer+3
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#else
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db 54h,timer+3 ;init refresh
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#endif
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db 12h,timer+1 ;refresh interval
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db 0ffh,0ffh ;end of table
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;
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; Timer, DMA, PIC initialization table (used in post2)
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;
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; first data byte, then port address
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;
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tdmatab: db 0,dma1+8+8 ;Enable dma1
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db 0c0h,dma1+0bh+0bh ;Cascade mode, channel 4
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db 041h,dma1+0bh+0bh ;Single mode, channel 5
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db 042h,dma1+0bh+0bh ;Single mode, channel 6
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db 043h,dma1+0bh+0bh ;Single mode, channel 7
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db 0,dma1+09h+09h ;clear DRQ4 request
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db 0,dma1+0ah+0ah ;unmask DRQ4 -> enable cascade
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db 0,dma0+8 ;Enable dma0
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db 40h,dma0+0bh ;Single mode, channel 0
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db 41h,dma0+0bh ;Single mode, channel 1
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db 42h,dma0+0bh ;Single mode, channel 2
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db 43h,dma0+0bh ;Single mode, channel 3
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db 0,npx+1 ;clear x87 interrupt
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db 11h,pic0 ;ICW1: edge, ICW4
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db 08h,pic0+1 ;ICW2: interrupt vector 08..0F
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db 04h,pic0+1 ;ICW3: IRQ2 is used for cascade
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db 01h,pic0+1 ;ICW4: 8086 mode
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db 0ffh,pic0+1 ;OCW: mask all interrupts
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db 11h,pic1 ;ICW1: edge, ICW4
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db 70h,pic1+1 ;ICW2: interrupt vector 70..77
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db 02h,pic1+1 ;ICW3: slave identification number
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db 01h,pic1+1 ;ICW4: 8086 mode
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db 0ffh,pic1+1 ;OCW: mask all interrupts
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db 26h,port92 ;enable A20 gate
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db 0ffh,0ffh ;end of table
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;
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; baud rates, H/L swapped
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;
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#if ! def rs_baud ;can be overridden by chipset
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rs_baud: db 04,17h ;110 baud
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db 03,00h ;150 baud
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db 01,80h ;300 baud
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db 00,0c0h ;600 baud
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db 00,60h ;1200 baud
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db 00,30h ;2400 baud
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db 00,18h ;4800 baud
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db 00,0ch ;9600 baud
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#endif
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;
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; serial port I/O addresses (points to scratch register)
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;
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rs_ports: dw 3ffh,2ffh,3efh,2efh,287h,28fh
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dw 297h,29fh,2F7h,377h,0 ;0 = end of table
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;
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; parallel port I/O addresses
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;
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lp_ports: dw 03bch,0378h,0278h,0 ;0 = end of table
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;
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; RTC initialization table
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;
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; Note: When location cm_dia is set to 80, MS-DOS will ignore the
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; RTC date and set 1980.
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;
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rtc_tab: db 0,cm_ss ;00: second
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db 0,cm_ssa ;01: alarm second
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db 0,cm_mm ;02: minute
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db 0,cm_mma ;03: alarm minute
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db 0,cm_hh ;04: hour
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db 0,cm_hha ;05: alarm hour
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db 0,cm_day ;06: day of week
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db 1,cm_dd ;07: day
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db 1,cm_mo ;08: month
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db 00h,cm_yy ;09: year
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db 80h,cm_dia ;0E: power loss flag
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db 20h,cm_cent ;32: century
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rtc_tab9: ;end of table
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