Disassembly cleanup
This commit is contained in:
Jeff Parsons
parent
27075b3443
commit
95b7e80c4b
4 changed files with 567 additions and 823 deletions
File diff suppressed because it is too large
Load diff
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@ -24,30 +24,29 @@
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mov [0x10e],cs ; 00000083 8C0E0E01 '....'
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sti ; 00000087 FB '.'
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mov byte [0x489],0x11 ; 00000088 C606890411 '.....'
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;
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; Initialize the ROM BIOS Video Mode Options byte @40:0087 (default to color and 256Kb of RAM)
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;
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;
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; Initialize the ROM BIOS Video Mode Options byte @40:0087 (default to color and 256Kb of RAM)
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;
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mov byte [0x487],0x60 ; 0000008D
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;
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; The x100 subroutine alternately enables port 0x3B? and 0x3D? decoding, verifying that there is
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; no response on opposing ports 0x3D? and 0x3B?, respectively; otherwise, it assumes that another
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; video card must exist and attempts to select co-existing settings for the VGA. For example, if
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; there is an unexpected response on the color ports, the VGA ROM will default to mono operation.
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;
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;
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; The x100 subroutine alternately enables port 0x3B? and 0x3D? decoding, verifying that there is
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; no response on opposing ports 0x3D? and 0x3B?, respectively; otherwise, it assumes that another
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; video card must exist and attempts to select co-existing settings for the VGA. For example, if
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; there is an unexpected response on the color ports, the VGA ROM will default to mono operation.
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;
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call x100 ; 00000092
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;
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; From the "IBM Personal System/2 Model 50 and 60 Technical Reference: I/O Controllers, Video Subsystem", p.4-29:
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;
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; When in setup mode (I/O address hex 0094, bit 5 equals 0), the VGA responds to a single option select byte
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; at I/O address hex 0102 and treats the LSB (bit 0) of that byte as the VGA sleep bit. When the LSB equals 0,
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; the VGA does not respond to commands, addresses, or data, on the data bus. When the LSB equals 1, the VGA
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; responds. If the VGA was set up and is generating video output when the LSB is set to 0, the output is still
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; generated.
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; When in setup mode (I/O address hex 0094, bit 5 equals 0), the VGA responds to a single option select byte
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; at I/O address hex 0102 and treats the LSB (bit 0) of that byte as the VGA sleep bit. When the LSB equals 0,
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; the VGA does not respond to commands, addresses, or data, on the data bus. When the LSB equals 1, the VGA
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; responds. If the VGA was set up and is generating video output when the LSB is set to 0, the output is still
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; generated.
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;
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; The VGA responds only to address hex 0102 when in the setup mode. No other addresses are valid at that time.
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; Conversely, the VGA ignores address hex 0102 when in the enabled mode (I/O address hex 0094, bit 5 equals 1),
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; and decodes normal I/O and memory addresses.
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; The VGA responds only to address hex 0102 when in the setup mode. No other addresses are valid at that time.
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; Conversely, the VGA ignores address hex 0102 when in the enabled mode (I/O address hex 0094, bit 5 equals 1),
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; and decodes normal I/O and memory addresses.
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;
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cli ; 00000095 FA '.'
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mov dx,0x46e8 ; 00000096 BAE846 '..F'
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@ -65,33 +64,28 @@
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sti ; 000000B1 FB '.'
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push cs ; 000000B2 0E '.'
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pop es ; 000000B3 07 '.'
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;
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; Default to mono settings
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;
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;
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; Default to mono settings
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;
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mov di,0x3b4 ; 000000B4 BFB403 '...'
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mov bx,0x1602 ; 000000B7 BB0216 '...'
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;
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; Test bit 1 of ROM BIOS Video Mode Options byte @40:0087 (set if mono, clear if color)
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;
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;
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; Test bit 1 of ROM BIOS Video Mode Options byte @40:0087 (set if mono, clear if color)
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;
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test byte [0x487],0x2 ; 000000BA F606870402 '.....'
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jnz xc7 ; 000000BF 7506 'u.'
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;
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; Choose color settings
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;
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;
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; Choose color settings
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;
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mov di,0x3d4 ; 000000C1 BFD403 '...'
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mov bx,0x1642 ; 000000C4 BB4216 '.B.'
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;
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; Set the CRTC base port address (0x3B4 for mono, 0x3D4 for color)
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;
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;
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; Set the CRTC base port address (0x3B4 for mono, 0x3D4 for color)
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;
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xc7: mov [0x463],di ; 000000C7 893E6304 '.>c.'
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;
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; Program the card for a default mode
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;
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;
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; Program the card for a default mode
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;
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call x1127 ; 000000CB E85910 '.Y.'
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xor al,al ; 000000CE 32C0 '2.'
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@ -6906,10 +6900,9 @@ x3765: dec ax ; 00003765 48 'H'
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dw font_8x14_supp ; 00003787 8D4D '.M'
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dw font_8x16 ; 0000378A BA4E '.N'
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dw font_8x16_supp ; 0000378B BA5E '.^'
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;
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; 8x8 font (8 bytes per row, one row per character)
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;
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;
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; 8x8 font (8 bytes per row, one row per character)
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;
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font_8x8:
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db 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 ; 0x0000378D ........
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db 0x7E,0x81,0xA5,0x81,0xBD,0x99,0x81,0x7E ; 0x00003795 ~......~
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@ -7168,10 +7161,9 @@ font_8x8_hi:
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db 0x70,0x18,0x30,0x60,0x78,0x00,0x00,0x00 ; 0x00003F75 p.0`x...
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db 0x00,0x00,0x3C,0x3C,0x3C,0x3C,0x00,0x00 ; 0x00003F7D ........
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db 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 ; 0x00003F85 ........
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;
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; 8x14 font (14 bytes per row, one row per character)
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;
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;
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; 8x14 font (14 bytes per row, one row per character)
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;
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font_8x14:
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db 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 ; 0x00003F8D ..............
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db 0x00,0x00,0x7E,0x81,0xA5,0x81,0x81,0xBD,0x99,0x81,0x7E,0x00,0x00,0x00 ; 0x00003F9B ..~.......~...
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@ -7429,10 +7421,9 @@ font_8x14:
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db 0x00,0x70,0xD8,0x30,0x60,0xC8,0xF8,0x00,0x00,0x00,0x00,0x00,0x00,0x00 ; 0x00004D63 .p.0`.........
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db 0x00,0x00,0x00,0x00,0x7C,0x7C,0x7C,0x7C,0x7C,0x7C,0x00,0x00,0x00,0x00 ; 0x00004D71 ....||||||....
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db 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 ; 0x00004D7F ..............
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;
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; 8x14 supplemental
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;
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;
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; 8x14 supplemental
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;
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font_8x14_supp:
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db 0x1D,0x00,0x00,0x00,0x00,0x24,0x66,0xFF,0x66,0x24,0x00,0x00,0x00,0x00,0x00 ; 0x00004D8D .....$f.f$.....
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db 0x22,0x00,0x63,0x63,0x63,0x22,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 ; 0x00004D9C ".ccc".........
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@ -7455,10 +7446,9 @@ font_8x14_supp:
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db 0xF1,0x00,0x00,0x18,0x18,0x18,0xFF,0x18,0x18,0x18,0x00,0xFF,0x00,0x00,0x00 ; 0x00004E9B ...............
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db 0xF6,0x00,0x00,0x18,0x18,0x00,0x00,0xFF,0x00,0x00,0x18,0x18,0x00,0x00,0x00 ; 0x00004EAA ...............
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db 0x00 ; end-of-supplemental terminator
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;
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; 8x16 font (16 bytes per row, one row per character)
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;
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;
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; 8x16 font (16 bytes per row, one row per character)
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;
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font_8x16:
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db 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 ; 0x00004EBA ................
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db 0x00,0x00,0x7E,0x81,0xA5,0x81,0x81,0xBD,0x99,0x81,0x81,0x7E,0x00,0x00,0x00,0x00 ; 0x00004ECA ..~........~....
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@ -7716,10 +7706,9 @@ font_8x16:
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db 0x00,0x70,0xD8,0x30,0x60,0xC8,0xF8,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 ; 0x00005E8A .p.0`...........
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db 0x00,0x00,0x00,0x00,0x7C,0x7C,0x7C,0x7C,0x7C,0x7C,0x7C,0x00,0x00,0x00,0x00,0x00 ; 0x00005E9A ....|||||||.....
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db 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 ; 0x00005EAA ................
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;
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; 8x16 supplemental
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;
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;
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; 8x16 supplemental
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;
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font_8x16_supp:
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db 0x1D,0x00,0x00,0x00,0x00,0x00,0x24,0x66,0xFF,0x66,0x24,0x00,0x00,0x00,0x00,0x00,0x00 ; 0x00005EBA ......$f.f$......
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db 0x30,0x00,0x00,0x3C,0x66,0xC3,0xC3,0xDB,0xDB,0xC3,0xC3,0x66,0x3C,0x00,0x00,0x00,0x00 ; 0x00005ECB 0...f......f.....
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