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https://github.com/SEPPDROID/Digital-Research-Source-Code.git
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96 lines
2.6 KiB
Plaintext
96 lines
2.6 KiB
Plaintext
; DISKS 3
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dpbase equ $ ;Base of Disk Parameter Blocks
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dpe0 dw xlt0,0000h ;Translate Table
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dw 0000h,0000h ;Scratch Area
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dw dirbuf,dpb0 ;Dir Buff, Parm Block
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dw csv0,alv0 ;Check, Alloc Vectors
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dpe1 dw xlt1,0000h ;Translate Table
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dw 0000h,0000h ;Scratch Area
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dw dirbuf,dpb1 ;Dir Buff, Parm Block
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dw csv1,alv1 ;Check, Alloc Vectors
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dpe2 dw xlt2,0000h ;Translate Table
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dw 0000h,0000h ;Scratch Area
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dw dirbuf,dpb2 ;Dir Buff, Parm Block
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dw csv2,alv2 ;Check, Alloc Vectors
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; DISKDEF 0,1,26,6,1024,243,64,64,2
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;
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; 1944: 128 Byte Record Capacity
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; 243: Kilobyte Drive Capacity
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; 64: 32 Byte Directory Entries
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; 64: Checked Directory Entries
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; 128: Records / Extent
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; 8: Records / Block
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; 26: Sectors / Track
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; 2: Reserved Tracks
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; 6: Sector Skew Factor
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;
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dpb0 equ offset $ ;Disk Parameter Block
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dw 26 ;Sectors Per Track
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db 3 ;Block Shift
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db 7 ;Block Mask
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db 0 ;Extnt Mask
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dw 242 ;Disk Size - 1
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dw 63 ;Directory Max
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db 192 ;Alloc0
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db 0 ;Alloc1
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dw 16 ;Check Size
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dw 2 ;Offset
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xlt0 equ offset $ ;Translate Table
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db 1,7,13,19
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db 25,5,11,17
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db 23,3,9,15
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db 21,2,8,14
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db 20,26,6,12
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db 18,24,4,10
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db 16,22
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als0 equ 31 ;Allocation Vector Size
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css0 equ 16 ;Check Vector Size
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; DISKDEF 1,0
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;
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; Disk 1 is the same as Disk 0
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;
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dpb1 equ dpb0 ;Equivalent Parameters
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als1 equ als0 ;Same Allocation Vector Size
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css1 equ css0 ;Same Checksum Vector Size
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xlt1 equ xlt0 ;Same Translate Table
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; DISKDEF 2,1,26,,1024,127,64,0,0
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;
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; 1016: 128 Byte Record Capacity
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; 127: Kilobyte Drive Capacity
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; 64: 32 Byte Directory Entries
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; 0: Checked Directory Entries
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; 128: Records / Extent
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; 8: Records / Block
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; 26: Sectors / Track
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; 0: Reserved Tracks
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;
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dpb2 equ offset $ ;Disk Parameter Block
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dw 26 ;Sectors Per Track
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db 3 ;Block Shift
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db 7 ;Block Mask
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db 0 ;Extnt Mask
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dw 126 ;Disk Size - 1
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dw 63 ;Directory Max
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db 192 ;Alloc0
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db 0 ;Alloc1
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dw 0 ;Check Size
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dw 0 ;Offset
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xlt2 equ 0 ;No Translate Table
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als2 equ 16 ;Allocation Vector Size
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css2 equ 0 ;Check Vector Size
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; ENDEF
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;
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; Uninitialized Scratch Memory Follows:
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;
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begdat equ offset $ ;Start of Scratch Area
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dirbuf rs 128 ;Directory Buffer
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alv0 rs als0 ;Alloc Vector
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csv0 rs css0 ;Check Vector
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alv1 rs als1 ;Alloc Vector
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csv1 rs css1 ;Check Vector
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alv2 rs als2 ;Alloc Vector
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csv2 rs css2 ;Check Vector
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enddat equ offset $ ;End of Scratch Area
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datsiz equ offset $-begdat ;Size of Scratch Area
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db 0 ;Marks End of Module
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