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82 lines
2.8 KiB
82 lines
2.8 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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; TODO: Query system via HBIOS API to determine actual size of
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; RAM and ROM, then adjust BPBIOS operation accordingly.
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;
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HB_RAMBANKS EQU 16 ; For systems with 512K of RAM
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;HB_RAMBANKS EQU 32 ; For systems with 1MB of RAM
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HB_ROMBANKS EQU 16 ; For systems with 512K of ROM
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;HB_ROMBANKS EQU 32 ; For systems with 1MB of ROM
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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 disk sizes expressed as count of 2K blocks. These values
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; are simply derived from values set previously and should. These
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; lines should not need to be changed.
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;
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HB_RAMBLKS EQU (HB_RAMBANKS - 8) * 16
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HB_ROMBLKS EQU (HB_ROMBANKS - 4) * 16
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;
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; Layout of RAM banks
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;
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; TODO: Query system via HBIOS API to determine the actual bank
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; assignments, then adjust BPBIOS operation accordingly.
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;
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BID_RAMD EQU -16 ; 90h - 16 = 80h
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BID_RAMM EQU -9 ; 90h - 9 = 87h
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BID_SYS EQU -4 ; 90h - 4 = 8Ch
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BID_HB EQU -3 ; 90h - 3 = 8Dh
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BID_USR EQU -2 ; 90h - 2 = 8Eh
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BID_COM EQU -1 ; 90h - 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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