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85 lines
3.0 KiB
85 lines
3.0 KiB
;:::::::::::::::::::::::::::::::::::::::::::::::**********************
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; B/P BIOS Configuration and Equate File. ** System Dependant **
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; - Retro-Brew Processors W/ RomWBW HBIOS - **********************
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; HBIOS specific customizations
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;:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
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; BIOS Configuration Equates and Macros
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;
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; NOTE: Must make sure settings below match hardware and
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; HBIOS configuration.
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;
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HBIOS EQU YES ; Use HBIOS functions
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HBLOC EQU 0FE00H ; Location of HBIOS proxy
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MEMTOP EQU HBLOC - 1 ; Last usable address
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;
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HB_DEBUG EQU FALSE ; See hbios.z80 file
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;
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; Set HB_IODEV to desired HBIOS character device unit number
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;
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; TODO: Query system via HBIOS API to determine number of serial
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; devices available and assign up to 3 of them to the 3 serial
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; device slots in BPBIOS at boot.
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;
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HB_IODEV EQU 80H ; 0x80 is current HBIOS console
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;
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; Set HB_MDRAM/ROM to desired HBIOS disk device numbers
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;
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HB_MDRAM EQU 0 ; HBIOS Disk Unit #0 is usually the RAM Disk
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HB_MDROM EQU 1 ; HBIOS Disk Unit #1 is usually the ROM Disk
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;
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; Set HB_HDDEVN to appropriate HBIOS disk device numbers
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;
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; If the RomWBW system has no floppy drives, then the hard disk units
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; will start right after the memory disk units. So, the first hard disk
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; will be unit #2. Refer to the DPH entries to see how the HBIOS
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; units are mapped to drive letters.
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;
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HB_HDDEV0 EQU 2 ; If no floppy drives in system, first HBIOS hard disk is unit #2
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HB_HDDEV1 EQU 3 ; Second hard disk is HBIOS Disk Device #3
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HB_HDDEV2 EQU 4 ; Third hard disk is HBIOS Disk Device #4
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;
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; Floppy disk support
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;
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; TODO: Query HBIOS to see if system has floppy drive(s). For now
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; we do not really support floppy drives.
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;
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DRV_O SET NO ; YES if system has flopy drives
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DRV_P SET NO ; YES if system has flopy drives
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;
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; RAM/ROM Bank Reserve
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;
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HB_RAMRESV EQU 5 ; RAM reserve is 5 banks
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HB_ROMRESV EQU 4 ; ROM reserve is 4 banks
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;
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; Layout of RAM banks
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;
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; The BID_xxx values below are used to set the initial values of
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; the BPBIOS bank registers (see def-ww-xxx.lib and HB_SELMEM in
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; hbios.z80). The running values of the BPBIOS bank registers (TPABNK,
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; SYSBNK, etc.) are set to absolute HBIOS bank ids in hbios.z80 during
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; startup.
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;
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; The values below are expressed as an offset from the ending HBIOS
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; RAM bank id. They map to HBIOS bank ids
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; by subtracting from the ending HBIOS bank id (N). HBIOS RAM bank ids
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; start at 80h. The ending HBIOS bank id is (80h + RAM banks). The
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; typical layout assumes 16 banks of RAM starting at HBIOS bank id 80h
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; and ending at bank id 90h (N = 90h).
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;
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; BPBIOS HBIOS (TYPICAL)
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; -------------------------------------- ---------------
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; <HBIOS> 80h (80h)
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; <RAMD> 81h (81h)
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; <RAMM> N - 5 (8Bh)
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BID_BUF EQU -4 ; BNK3 -> RAMBNK N - 4 (8Ch)
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BID_SYS EQU -3 ; BNK2 -> SYSBNK N - 3 (8Dh)
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BID_USR EQU -2 ; BNK0 -> TPABNK N - 2 (8Eh)
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BID_COM EQU -1 ; BNK1 -> N - 1 (8Fh)
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;
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HB_EI MACRO
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EI
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ENDM
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HB_DI MACRO
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DI
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ENDM
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