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218 lines
9.7 KiB
Z80 Assembly
218 lines
9.7 KiB
Z80 Assembly
;::::::::::::::::::::::::::::::::::::::::::********************************
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; I/O Configuration Area ****** Hardware Specific ******
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; - Retro-Brew Computers w/ HBIOS- ********************************
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;
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; 1.4 - 29 Nov 16 - Updated for HBIOS version 2.8 WW
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; 1.3 - 17 Jan 14 - N8VEM Initial Test release WW+LN
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; 1.2 - 22 Aug 01 - Cleaned up for GPL release. HFB
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; 1.1 - 18 Apr 97 - Modified to Add GIDE Definitions. HFB
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; 1.0 - 27 Jan 97 - Initial Release for P112. HFB
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;:::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::
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;*** * * * * * * * * * * W A R N I N G ! ! ! * * * * * * * * * * * * ***
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;*** Do NOT alter any of the ordering or sizing of the following data ***
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;*** locations or utilities will probably NOT function correctly! ***
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;*** * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * ***
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CSEG
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; Form Option Byte 1
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OPT1 DEFL [BANKED AND 1] ; Bit 0 = unbanked/banked
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OPT1 DEFL OPT1+[INROM AND 2] ; Bit 1 = Bank in RAM/Bank in ROM
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OPT1 DEFL OPT1+[AUTOSL AND 4] ; Bit 2 = DPB Fixed/DPB Assignable
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OPT1 DEFL OPT1+[BANKED AND ZSDOS2 AND 8] ; Bit 3 = ALV/CSV in Banked RAM
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; Bit 7 is "Lock" flag for system loads
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; If set to 1, LDSYS will not load a
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; new system over the running one.
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DEFB 'B/P-WW' ; Six-char string for Text ID Matching
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CONFIG:
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;IOBYT: DEFB 10010100B ; LST:=PIO, AUX:=COM2, CON:=COM1
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IOBYT: DEFB 11111100B ; LST:=Null, AUX:=Null, CON:=COM1
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SYSDRV: DEFB 2 ; System drive (a=0, b=1...)
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OPTF1: DEFB OPT1 ; Option flags
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UABNK: DEFB BNKU ; Beginning of User Bank(s) if Banked System
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; (Ending Bank denoted by SYSBNK-1)
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TPABNK: DEFB BNK0 ; TPA Bank Number if Banked System
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SYSBNK: DEFB BNK2 ; Beginning of System Bank(s) if Banked System
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; (Ending Bank denoted by RAMBNK-1)
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RAMBNK: DEFB BNK3 ; Base Bank Number for Ram Disk
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MAXBNK: DEFB BNKM ; Highest permissible Bank Number
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HICOMM: DEFB 80H ; Page address of start of high Common Memory
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DPBSZ: DEFB DPBSIZ ; Size of DPB
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NUMDPB:
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IF BANKED
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DEFB 0 ; Number of DPBs in Common RAM
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DEFB NRDPB ; Number of Banked DPBs
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ELSE
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DEFB NRDPB ; Number of DPBs in Common RAM
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DEFB 0 ; Number of Banked DPBs
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ENDIF
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DPBADR:
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IF BANKED
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DEFW 0 ; Pointer to dirst Common RAM XDPB
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DEFW DPB ; Pointer to first XDPB in Alternate Bank
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ELSE
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DEFW DPB ; Pointer to first Common RAM XDPB
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DEFW 0 ; Pointer to first XDPB in Alternate Bank
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ENDIF
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AUTOCMD: AUTOCL ; Startup command for Z3
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;AUTOCMD: DEFB 8,'startupf',0 ; Startup command for Z3
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ENVADR: DEFW Z3ENV ; Pointer to the Environment Descriptor
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;------------ Banked User Area Control Information ---------------
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; An existing User Area cannot exist in Bank 0 by decree. The User Area
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; can therefore be used as a flag to determine whether such an area exists.
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; The Bank Number is set in DEF-xx.LIB. To keep Page 0 equivalent free in
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; the user bank, we offset values to 80H (it's just a good number). The
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; top of each User Bank is 7FFFH as with all of the switched banks in
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; a B/P Bios System. Banked applications should chain themselves together
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; sequentially so that the end can be determined and space managed.
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UADAT: DEFB BNKU ; Flag for Banked User Area (0 if None)
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DEFW 0080H ; Pointer to Start of User area in Bank
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;---------------- CPU Configuration Information ------------------
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SPEED: DEFB MHZ ; Set to processor speed value in Configuration
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WAITS: DEFB 00010010B ; Number of additional Memory & IO Wait states
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; ||||++++--- # of IO Wait States (bits 3-0, only 1 & 0 used)
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; ++++------- # of Memory Wait States (bits 7-4, only 5 & 4 used)
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RELOD0: DEFW 2560*MHZ ; 16-bit constant for counter/timer refresh
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; based on 50 mS Interrupts to Down Timer.
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; Use 2560 for 12.288/18.432MHz etc. Crystals,
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; 2500 for 16.000MHz Crystals.
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;-------- Physical Floppy Disk Configuration Information ---------
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; The Physical Drive table consists of 5 bytes for each of 4 Floppy Drives
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; thereby providing all necessary data to all types of controllers.
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;
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; 1 - Drive Characteristics Bits. The Bits have the following meanings:
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; D D D D D D D D
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; 7 6 5 4 3 2 1 0
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; | | | | | +-+-+---- Disk Size 000=Fixed; 001=8"; 010=5.25"; 011=3.5" (*)
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; | | | | +---------- Single-Sided (0); Double-Sided (1)
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; | | | +------------ (Reserved for Double-Step(1) in XDPH)
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; | | +-------------- Drive Motor Control (1); Motor Always On (0)
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; | +---------------- Max Speed is 5.25" (0); 8" & Hard Disk & Hi-Dens (1)
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; +------------------ (Reserved for Single(1)/Double(0) Density in XDPH)
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; (*) - 3.5" and 5.25" drives are treated the same for many formats with
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; the drive bits being reduced to 010B in the BIOS code.
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; 2 - Drive Step Rate (1 to 16 in increments of 1) in milliseconds
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; 3 - Head Load Time (2 to 254 in increments of 2) in milliseconds
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; 4 - Head Unload Time (16 to 240 in increments of 16) in milliseconds
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; 5 - Number of Physical Tracks on Drive
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FDCSPEC: DEFB 6BH,4,24,240,80 ; #1 (3"DSHD,4 mS Step,24mS HLT,240 mS HUT,80t)
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DEFB 2AH,4,24,240,40 ; #2 (5"DS,4 mS Step,24mS HLT,240 mS HUT,40t)
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DEFB 2AH,4,24,240,80 ; #3 (5"DS,4 mS Step,24mS HLT,240 mS HUT,80t)
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DEFB 6AH,4,24,240,80 ; #4 (3"DS,4 mS Step, 24mS HLT,240 mS HUT,80t)
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MONTIM: DEFB 100 ; Motor On Time (1 to 255) in tenths-of-seconds
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SPINUP: DEFB 8 ; Spinup delay (1 to 255) in tenths-of-seconds
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MXRTRY: DEFB 4 ; Maximum Number of retries on Floppy Opns
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;IVCT: DEFW INTTBL ; Pointer to interrupt vectors - WW
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IVCT: DEFW 0 ; Pointer to interrupt vectors
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;-------- Physical Hard Drive Configuration Information ----------
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; Hard Disk data begins w/Controller Type, followed by data for 3 drives.
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; BPCNFG only supports 3 devices. Originally BPBIOS systems used a SCSI
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; interface that could support up to 7 physical drives. Thus the hard disk
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; data begins w/ controller type (read SCSI type). Later the GIDE adapter
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; became available. It supported only two drives. IDE drives usually have
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; much larger capacity and so more drives were never needed with the IDE.
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; In the extended DPH the drive associated with each logical CPM drive is
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; specified. In ver 2.8 of HBIOS, disk devices are discovered dynamically,
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; in the order RAM, ROM, IDE then SD and assigned at that time a
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; device number. So the ROM drive is usually device 1, the IDE or HDSK0 is
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; device 2 and the SD or HDSK1 is device 3. In this situation, the hard
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; disk data below seems redundant. To maintain compatibility it will be
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; retained but mostly not used. Controller type will be set GIDE and the
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; rest of the data will be set to describe a generic 8 mB drive. The data
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; for each drive consists of a byte containing bit codes for Device and a
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; bit indicating whether or not the drive is physically connected to the
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; system. The configuration should match that contained in DPHHD-xx.LIB
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; for Hard Drive partitions, i.e. the unit specified in DPHHD-NH will be
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; used in the hard disk driver. The byte for Hard Drive partitions
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; contains the following bit fields
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;.
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; Bit 7 6 5 4 3 2 1 0
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; | | | | | | | |
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; | | | | | +-+-+-- Physical Device Number (0..6, 7 = Host)
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; | | | | +-------- (reserved)
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; | | | +---------- 1 = Drive Active, 0 = No Drive
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; +-+-+------------ Logical Unit Number (usually 0 or 1
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; i.e. master or slave for IDE)
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;.....
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; The Controller Type Byte contains information needed to dictate the specific
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; bytes to be used to communicate to a BPBIOS-connected Hard Drive.
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; Additional bytes will be defined as needed, so please coordinate any
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; extensions with the Authors to insure the generality of tools. Note that
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; this byte is not used since HBIOS presents a unified interface to BPBIOS.
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; Also note that BPCNFG only knows about the first ten controller types,
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; Second IDE and HBIOS are "Unknown" devices to BPCNFG but it will accept
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; these types if input.
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CNTRLR: DEFB 80H ; Controller Types recognized are:
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; 0 = Owl
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; 1 = Adaptec ACB4000a
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; 2 = Xebec 1410A, Shugart 1610-3
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; 3 = Seagate SCSI
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; 4 = Shugart 1610-4 (Minimal SCSI)
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; 5 = Conner SCSI
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; 6 = Quantum SCSI
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; 7 = Maxtor SCSI
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; 8 = Syquest SCSI
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; 80H = First IDE
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; 81H = Second IDE
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; 90H = HBIOS Disk IO
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; First drive (Generic HBIOS drive configuration)
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BITS DEFL HB_HDDEV0 ; First HBIOS Hard Disk Drive
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BITS DEFL BITS+[UNIT_0 AND 10H] ; If active, set Bit 4
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HDRV0: ; used to convert logical to physical sector addressing
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DEFB BITS ; Set Device, Unit, and Active bits
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DEFW 520 ; # Cylinders - nuf for 8 8mB partitions
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DEFB 16 ; Number of Heads
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DEFW 16 ; IDE - Number of Sectors Per Track
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DEFW 0000 ; Cylinder # to start precompensation
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DEFB 0 ; Step Rate (0=3ms, 1=28us, 2=12us)
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; Second drive (Generic HBIOS drive configuration)
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BITS DEFL HB_HDDEV1 ; Second HBIOS Hard Disk Drive
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BITS DEFL BITS+[UNIT_1 AND 10H] ; If active, set Bit 4
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HDRV1: DEFB BITS ; Set Device, Unit, and Active bits
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DEFW 520 ; Number of Cylinders
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DEFB 16 ; Number of Heads
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DEFW 16 ; IDE - Number of Sectors Per Track
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DEFW 0000 ; Cylinder # to start precompensation
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DEFB 0 ; Step Rate (0=3ms, 1=28us, 2=12us)
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; Third drive (Generic HBIOS drive configuration)
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BITS DEFL HB_HDDEV2 ; Third HBIOS Hard Disk Drive
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BITS DEFL BITS+[UNIT_2 AND 10H] ; If active, set Bit 4
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HDRV2: DEFB BITS ; Set Device, Unit, and Active bits
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DEFW 520 ; Number of Cylinders
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DEFB 16 ; Number of Heads
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DEFW 16 ; IDE - Number of Sectors Per Track
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DEFW 0000 ; Cylinder # to start precompensation
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DEFB 0 ; Step Rate (0=3ms, 1=28us, 2=12us)
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DEFB 0,0,0,0,0 ; (Reserved)
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;======= End of Fixed Config ======== Device Config follows ========
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