Add option for 8-colour mode
Some BIOSs initialize the VGA card by default into a mode where the high bit of background nybble signals that the cell should blink. The simple way to avoid this is by restricting the background colours to the range 0…7. However, since our mouse cursor is implemented by swapping the foreground and the background colours, we also need to restrict the foreground colours to the range 0…7.
This commit is contained in:
Juhani Krekelä
parent
a496c5ce9d
commit
d4c15687c8
6
Makefile
6
Makefile
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@ -2,6 +2,8 @@ NASM = nasm
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PYTHON = python3
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QEMU = qemu-system-i386
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BUILDOPTS =
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.SUFFIXES:
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.SUFFIXES: .bin .asm .ans .wall
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@ -26,10 +28,10 @@ viewer.bin: ponydos.inc
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memory.bin: ponydos.inc
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.asm.bin:
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$(NASM) -fbin -o $@ $<
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$(NASM) -fbin $(BUILDOPTS) -o $@ $<
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.ans.wall:
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$(PYTHON) process_wallpaper.py $@ $< 7 0 0 0
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env BUILDOPTS='$(BUILDOPTS)' $(PYTHON) process_wallpaper.py $@ $< 7 0 0 0
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run: ponydos.img
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$(QEMU) -drive file=$<,index=0,if=floppy,format=raw
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14
README.md
14
README.md
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@ -20,6 +20,16 @@ run `make`. `make run` runs the floppy disk image `ponydos.img` with QEMU.
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By default, `qemu-system-i386` is invoked. If you want to use a different
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backend, use `make QEMU=<backend> run`.
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### Build options
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You can configure the build using build options passed to the build system using
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the `BUILDOPTS` variable, e.g. `make BUILDOPTS='-DBLINKY'`. It is advised to run
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`make clean` before changing the value of `BUILDOPTS`.
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* `-DBLINKY` builds an image which restricts the number of colours to 8. This is
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for compatibility with BIOSs which use the highest bit of background colour to
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signal that a cell should blink.
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### How do I contribute?
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There is a model `hello.asm` file to demonstrate how best to use the
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@ -70,3 +80,7 @@ You don't.
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At the moment, PonyDOS is only offered as a live floppy disk image with no
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installation option, for your safety.
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#### How do I stop my entire desktop from blinking?
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Build with the [build option](#build-options) `-DBLINKY`.
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12
hello.asm
12
hello.asm
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@ -2,6 +2,14 @@
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cpu 8086
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bits 16
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%ifdef BLINKY
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TITLEBAR_ATTRIBUTE equ 0x07
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WINDOW_ATTRIBUTE equ 0x70
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%else
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TITLEBAR_ATTRIBUTE equ 0x0f
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WINDOW_ATTRIBUTE equ 0xf0
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%endif
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WINDOW_STATUS_NORMAL equ 0
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WINDOW_STATUS_MOVE equ 1
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WINDOW_STATUS_RESIZE equ 2
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@ -498,12 +506,12 @@ render_window:
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mov cx, [window_height]
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mul cx
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mov cx, ax
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mov ax, 0xf000 ; Attribute is in the high byte
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mov ax, WINDOW_ATTRIBUTE<<8 ; Attribute is in the high byte
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rep stosw
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; Set title bar to be white-on-black
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mov di, window_data
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mov ax, 0x0f00
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mov ax, TITLEBAR_ATTRIBUTE<<8
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mov cx, [window_width]
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rep stosw
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20
memory.asm
20
memory.asm
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@ -2,6 +2,14 @@
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cpu 8086
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bits 16
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%ifdef BLINKY
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TITLEBAR_ATTRIBUTE equ 0x07
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WINDOW_ATTRIBUTE equ 0x70
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%else
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TITLEBAR_ATTRIBUTE equ 0x0f
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WINDOW_ATTRIBUTE equ 0xf0
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%endif
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WINDOW_STATUS_NORMAL equ 0
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WINDOW_STATUS_MOVE equ 1
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@ -572,9 +580,9 @@ window_status db WINDOW_STATUS_NORMAL
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window_move_x_offset dw 0
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window_data:
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db 'U', 0x0f, 's', 0x0f, 'a', 0x0f, 'g', 0x0f, 'e', 0x0f
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times 10-5-1 db 0x00, 0x0f
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db 'x', 0x0f
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db '0', 0xf0, '1', 0xf0, '2', 0xf0, '3', 0xf0, '4', 0xf0, '5'
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db 0xf0, '6', 0xf0, '7', 0xf0, '8', 0xf0, '9', 0xf0
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.indicators: times 10 db 0x00, 0xf0
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db 'U', TITLEBAR_ATTRIBUTE, 's', TITLEBAR_ATTRIBUTE, 'a', TITLEBAR_ATTRIBUTE, 'g', TITLEBAR_ATTRIBUTE, 'e', TITLEBAR_ATTRIBUTE
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times 10-5-1 db 0x00, TITLEBAR_ATTRIBUTE
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db 'x', TITLEBAR_ATTRIBUTE
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db '0', WINDOW_ATTRIBUTE, '1', WINDOW_ATTRIBUTE, '2', WINDOW_ATTRIBUTE, '3', WINDOW_ATTRIBUTE, '4', WINDOW_ATTRIBUTE, '5'
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db WINDOW_ATTRIBUTE, '6', WINDOW_ATTRIBUTE, '7', WINDOW_ATTRIBUTE, '8', WINDOW_ATTRIBUTE, '9', WINDOW_ATTRIBUTE
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.indicators: times 10 db 0x00, WINDOW_ATTRIBUTE
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@ -1,3 +1,4 @@
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import os
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import sys
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from collections import namedtuple
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@ -14,6 +15,15 @@ if len(sys.argv) != 7:
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print("Usage: {sys.argv[0]} outfile infile default_fgcolor default_bgcolor origin_x origin_y", file=sys.stderr)
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sys.exit(1)
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blinky_vgamode = False
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if 'BUILDOPTS' in os.environ:
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for opt in os.environ['BUILDOPTS'].split():
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if opt == '-DBLINKY':
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blinky_vgamode = True
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else:
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print(f"Error: Unrecognized build option {opt}", file=sys.stderr)
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sys.exit(1)
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outfile = sys.argv[1]
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infile = sys.argv[2]
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@ -118,5 +128,14 @@ with open(outfile, 'wb') as f:
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for y in range(HEIGHT):
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for x in range(WIDTH):
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fgcolor, bgcolor, bold = attributes[x][y]
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fgcolor = fgcolor | (8 if bold else 0)
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if blinky_vgamode:
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# VGA mode can be set up so that the highest
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# bit of the bg colour marks that the cell
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# should blink instead of intensity
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# Restrict the colours (including foreground
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# to account for swapping of the two) to 0…7
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fgcolor = fgcolor & 0x7
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bgcolor = bgcolor & 0x7
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char = chars[x][y]
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f.write(bytes([char, (bgcolor<<4) | fgcolor | (8 if bold else 0)]))
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f.write(bytes([char, (bgcolor<<4) | fgcolor]))
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54
shell.asm
54
shell.asm
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@ -1,4 +1,16 @@
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%include "ponydos.inc"
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cpu 8086
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bits 16
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%ifdef BLINKY
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TITLEBAR_ATTRIBUTE equ 0x07
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WINDOW_ATTRIBUTE equ 0x70
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DISK_ATTRIBUTE equ 0x07
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%else
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TITLEBAR_ATTRIBUTE equ 0x0f
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WINDOW_ATTRIBUTE equ 0xf0
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DISK_ATTRIBUTE equ 0x0f
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%endif
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struc window
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.next resw 1
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@ -637,7 +649,7 @@ launch:
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show_launch_error:
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mov di, launch_error_dialog.filename
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mov cx, FS_DIRENT_NAME_SIZE-1
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mov ah, 0xf0
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mov ah, WINDOW_ATTRIBUTE
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.copy:
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lodsb
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test al, al
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@ -937,11 +949,11 @@ render_file_window:
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mov es, ax
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mov di, [si + window.data]
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mov cx, [si + window.width]
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mov ax, 0x0f00
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mov ax, TITLEBAR_ATTRIBUTE<<8
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rep stosw
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mov cx, (ROWS-1)*COLUMNS
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mov ax, 0xf000
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mov ax, WINDOW_ATTRIBUTE<<8
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rep stosw
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mov di, [si + window.data]
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@ -1225,28 +1237,28 @@ viewer_file_name db 'viewer.bin', 0
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; ------------------------------------------------------------------
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disk_icon:
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db 0x00, 0x0f, 0x00, 0x0f, 0x00, 0x0f, 0x00, 0x0f, 0x00, 0x0f
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db 0x00, 0x0f, 0x00, 0x0f, 0x09, 0x0f, 0x00, 0x0f, 0x00, 0x0f
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db 0x00, 0x0f, 0x00, 0x0f, '|', 0x0f, 0x00, 0x0f, 0x00, 0x0f
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db 0x00, DISK_ATTRIBUTE, 0x00, DISK_ATTRIBUTE, 0x00, DISK_ATTRIBUTE, 0x00, DISK_ATTRIBUTE, 0x00, DISK_ATTRIBUTE
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db 0x00, DISK_ATTRIBUTE, 0x00, DISK_ATTRIBUTE, 0x09, DISK_ATTRIBUTE, 0x00, DISK_ATTRIBUTE, 0x00, DISK_ATTRIBUTE
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db 0x00, DISK_ATTRIBUTE, 0x00, DISK_ATTRIBUTE, '|', DISK_ATTRIBUTE, 0x00, DISK_ATTRIBUTE, 0x00, DISK_ATTRIBUTE
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oom_error_dialog:
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db 'E', 0x0f, 'r', 0x0f, 'r', 0x0f, 'o', 0x0f, 'r', 0x0f
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times 13-5-1 db 0x00, 0x0f
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db 'x', 0x0f
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db 'O', 0xf0, 'u', 0xf0, 't', 0xf0, ' ', 0xf0, 'o', 0xf0, 'f', 0xf0
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db ' ', 0xf0, 'm', 0xf0, 'e', 0xf0, 'm', 0xf0, 'o', 0xf0, 'r', 0xf0
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db 'y', 0xf0
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db 'E', TITLEBAR_ATTRIBUTE, 'r', TITLEBAR_ATTRIBUTE, 'r', TITLEBAR_ATTRIBUTE, 'o', TITLEBAR_ATTRIBUTE, 'r', TITLEBAR_ATTRIBUTE
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times 13-5-1 db 0x00, TITLEBAR_ATTRIBUTE
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db 'x', TITLEBAR_ATTRIBUTE
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db 'O', WINDOW_ATTRIBUTE, 'u', WINDOW_ATTRIBUTE, 't', WINDOW_ATTRIBUTE, ' ', WINDOW_ATTRIBUTE, 'o', WINDOW_ATTRIBUTE, 'f', WINDOW_ATTRIBUTE
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db ' ', WINDOW_ATTRIBUTE, 'm', WINDOW_ATTRIBUTE, 'e', WINDOW_ATTRIBUTE, 'm', WINDOW_ATTRIBUTE, 'o', WINDOW_ATTRIBUTE, 'r', WINDOW_ATTRIBUTE
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db 'y', WINDOW_ATTRIBUTE
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launch_error_dialog:
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db 'E', 0x0f, 'r', 0x0f, 'r', 0x0f, 'o', 0x0f, 'r', 0x0f
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times FS_DIRENT_NAME_SIZE-1-5-1 db 0x00, 0x0f
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db 'x', 0x0f
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db 'C', 0xf0, 'a', 0xf0, 'n', 0xf0, 'n', 0xf0, 'o', 0xf0, 't', 0xf0
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db ' ', 0xf0, 'l', 0xf0, 'a', 0xf0, 'u', 0xf0, 'n', 0xf0, 'c', 0xf0
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db 'h', 0xf0, ' ', 0xf0, 'f', 0xf0, 'i', 0xf0, 'l', 0xf0, 'e', 0xf0
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db ':', 0xf0
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times FS_DIRENT_NAME_SIZE-1-19 db 0x00, 0xf0
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.filename times FS_DIRENT_NAME_SIZE-1 db 0x00, 0xf0
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db 'E', TITLEBAR_ATTRIBUTE, 'r', TITLEBAR_ATTRIBUTE, 'r', TITLEBAR_ATTRIBUTE, 'o', TITLEBAR_ATTRIBUTE, 'r', TITLEBAR_ATTRIBUTE
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times FS_DIRENT_NAME_SIZE-1-5-1 db 0x00, TITLEBAR_ATTRIBUTE
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db 'x', TITLEBAR_ATTRIBUTE
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db 'C', WINDOW_ATTRIBUTE, 'a', WINDOW_ATTRIBUTE, 'n', WINDOW_ATTRIBUTE, 'n', WINDOW_ATTRIBUTE, 'o', WINDOW_ATTRIBUTE, 't', WINDOW_ATTRIBUTE
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db ' ', WINDOW_ATTRIBUTE, 'l', WINDOW_ATTRIBUTE, 'a', WINDOW_ATTRIBUTE, 'u', WINDOW_ATTRIBUTE, 'n', WINDOW_ATTRIBUTE, 'c', WINDOW_ATTRIBUTE
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db 'h', WINDOW_ATTRIBUTE, ' ', WINDOW_ATTRIBUTE, 'f', WINDOW_ATTRIBUTE, 'i', WINDOW_ATTRIBUTE, 'l', WINDOW_ATTRIBUTE, 'e', WINDOW_ATTRIBUTE
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db ':', WINDOW_ATTRIBUTE
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times FS_DIRENT_NAME_SIZE-1-19 db 0x00, WINDOW_ATTRIBUTE
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.filename times FS_DIRENT_NAME_SIZE-1 db 0x00, WINDOW_ATTRIBUTE
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windows:
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times window.size db 0
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75
viewer.asm
75
viewer.asm
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@ -2,6 +2,19 @@
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cpu 8086
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bits 16
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%ifdef BLINKY
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TITLEBAR_ATTRIBUTE equ 0x07
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WINDOW_ATTRIBUTE equ 0x70
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CANCEL_ATTRIBUTE equ 0x07
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%else
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TITLEBAR_ATTRIBUTE equ 0x0f
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WINDOW_ATTRIBUTE equ 0xf0
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CANCEL_ATTRIBUTE equ 0x8f
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%endif
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OK_ATTRIBUTE equ 0x20
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OPEN_DIALOG_ATTRIBUTE equ 0x70
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FILENAME_ATTRIBUTE equ WINDOW_ATTRIBUTE
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WINDOW_STATUS_NORMAL equ 0
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WINDOW_STATUS_MOVE equ 1
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WINDOW_STATUS_RESIZE equ 2
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@ -591,14 +604,14 @@ event_click:
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mov bx, ax
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inc bx
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cmp byte [bx], CANCEL_COLOR
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cmp byte [bx], CANCEL_ATTRIBUTE
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jne .not_cancel
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.cancel:
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call unhook_self_from_window_chain
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mov byte [exiting], 1
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jmp .end
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.not_cancel:
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cmp byte [bx], OK_COLOR
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cmp byte [bx], OK_ATTRIBUTE
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jne .not_ok
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.ok:
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call filename_ok
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@ -921,12 +934,12 @@ render_window:
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mov cx, [window.height]
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mul cx
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mov cx, ax
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mov ax, 0xf000 ; Attribute is in the high byte
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mov ax, WINDOW_ATTRIBUTE<<8 ; Attribute is in the high byte
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rep stosw
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; Set title bar to be white-on-black
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mov di, text_window_data
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mov ax, 0x0f00
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mov ax, TITLEBAR_ATTRIBUTE<<8
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mov cx, [window.width]
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rep stosw
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@ -1233,46 +1246,44 @@ cur_filename_address dw filename_window_data.filename
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file_opened db 0
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; pre-built windows
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CANCEL_COLOR equ 0x8f
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OK_COLOR equ 0x20
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filename_window_data:
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; header
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db 'V', 0x0f, 'i', 0x0f, 'e', 0x0f, 'w', 0x0f, 'e', 0x0f, 'r', 0x0f
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times FS_DIRENT_NAME_SIZE + 2 - 7 db 0, 0x0f
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db 'x', 0x0f
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db 'V', TITLEBAR_ATTRIBUTE, 'i', TITLEBAR_ATTRIBUTE, 'e', TITLEBAR_ATTRIBUTE, 'w', TITLEBAR_ATTRIBUTE, 'e', TITLEBAR_ATTRIBUTE, 'r', TITLEBAR_ATTRIBUTE
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times FS_DIRENT_NAME_SIZE + 2 - 7 db 0, TITLEBAR_ATTRIBUTE
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db 'x', TITLEBAR_ATTRIBUTE
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; blank line
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times FS_DIRENT_NAME_SIZE + 2 db 0, 0x70
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times FS_DIRENT_NAME_SIZE + 2 db 0, OPEN_DIALOG_ATTRIBUTE
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; filename
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db 0, 0x70
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db 0, OPEN_DIALOG_ATTRIBUTE
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.filename:
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times FS_DIRENT_NAME_SIZE db 0, 0xf0
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db 0, 0x70
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times FS_DIRENT_NAME_SIZE db 0, FILENAME_ATTRIBUTE
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db 0, OPEN_DIALOG_ATTRIBUTE
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; blank line
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times FS_DIRENT_NAME_SIZE + 2 db 0, 0x70
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times FS_DIRENT_NAME_SIZE + 2 db 0, OPEN_DIALOG_ATTRIBUTE
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; buttons line
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times 7 db 0, 0x70
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db 0, 0x8f, 'C', 0x8f, 'a', 0x8f, 'n', 0x8f, 'c', 0x8f, 'e', 0x8f, 'l', 0x8f, 0, 0x8f
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times 5 db 0, 0x70
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db 0, 0x20, 'O', 0x20, 'K', 0x20, 0x, 0x20
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times 8 db 0, 0x70
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times 7 db 0, OPEN_DIALOG_ATTRIBUTE
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db 0, CANCEL_ATTRIBUTE, 'C', CANCEL_ATTRIBUTE, 'a', CANCEL_ATTRIBUTE, 'n', CANCEL_ATTRIBUTE, 'c', CANCEL_ATTRIBUTE, 'e', CANCEL_ATTRIBUTE, 'l', CANCEL_ATTRIBUTE, 0, CANCEL_ATTRIBUTE
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times 5 db 0, OPEN_DIALOG_ATTRIBUTE
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db 0, OK_ATTRIBUTE, 'O', OK_ATTRIBUTE, 'K', OK_ATTRIBUTE, 0x, OK_ATTRIBUTE
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times 8 db 0, OPEN_DIALOG_ATTRIBUTE
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; blank line
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times FS_DIRENT_NAME_SIZE + 2 db 0, 0x70
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times FS_DIRENT_NAME_SIZE + 2 db 0, OPEN_DIALOG_ATTRIBUTE
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oom_window_data:
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db 'E', 0x0f, 'r', 0x0f, 'r', 0x0f, 'o', 0x0f, 'r', 0x0f
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times 13-5-1 db 0x00, 0x0f
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db 'x', 0x0f
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db 'O', 0xf0, 'u', 0xf0, 't', 0xf0, ' ', 0xf0, 'o', 0xf0, 'f', 0xf0
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db ' ', 0xf0, 'm', 0xf0, 'e', 0xf0, 'm', 0xf0, 'o', 0xf0, 'r', 0xf0
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db 'y', 0xf0
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db 'E', TITLEBAR_ATTRIBUTE, 'r', TITLEBAR_ATTRIBUTE, 'r', TITLEBAR_ATTRIBUTE, 'o', TITLEBAR_ATTRIBUTE, 'r', TITLEBAR_ATTRIBUTE
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times 13-5-1 db 0x00, TITLEBAR_ATTRIBUTE
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db 'x', TITLEBAR_ATTRIBUTE
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db 'O', WINDOW_ATTRIBUTE, 'u', WINDOW_ATTRIBUTE, 't', WINDOW_ATTRIBUTE, ' ', WINDOW_ATTRIBUTE, 'o', WINDOW_ATTRIBUTE, 'f', WINDOW_ATTRIBUTE
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db ' ', WINDOW_ATTRIBUTE, 'm', WINDOW_ATTRIBUTE, 'e', WINDOW_ATTRIBUTE, 'm', WINDOW_ATTRIBUTE, 'o', WINDOW_ATTRIBUTE, 'r', WINDOW_ATTRIBUTE
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db 'y', WINDOW_ATTRIBUTE
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ood_window_data:
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db 'E', 0x0f, 'r', 0x0f, 'r', 0x0f, 'o', 0x0f, 'r', 0x0f
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times 17-5-1 db 0x00, 0x0f
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db 'x', 0x0f
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db 'O', 0xf0, 'u', 0xf0, 't', 0xf0, ' ', 0xf0, 'o', 0xf0, 'f', 0xf0
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db ' ', 0xf0, 'd', 0xf0, 'i', 0xf0, 's', 0xf0, 'k', 0xf0, ' ', 0xf0
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db 's', 0xf0, 'p', 0xf0, 'a', 0xf0, 'c', 0xf0, 'e', 0xf0
|
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db 'E', TITLEBAR_ATTRIBUTE, 'r', TITLEBAR_ATTRIBUTE, 'r', TITLEBAR_ATTRIBUTE, 'o', TITLEBAR_ATTRIBUTE, 'r', TITLEBAR_ATTRIBUTE
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times 17-5-1 db 0x00, TITLEBAR_ATTRIBUTE
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db 'x', TITLEBAR_ATTRIBUTE
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db 'O', WINDOW_ATTRIBUTE, 'u', WINDOW_ATTRIBUTE, 't', WINDOW_ATTRIBUTE, ' ', WINDOW_ATTRIBUTE, 'o', WINDOW_ATTRIBUTE, 'f', WINDOW_ATTRIBUTE
|
||||
db ' ', WINDOW_ATTRIBUTE, 'd', WINDOW_ATTRIBUTE, 'i', WINDOW_ATTRIBUTE, 's', WINDOW_ATTRIBUTE, 'k', WINDOW_ATTRIBUTE, ' ', WINDOW_ATTRIBUTE
|
||||
db 's', WINDOW_ATTRIBUTE, 'p', WINDOW_ATTRIBUTE, 'a', WINDOW_ATTRIBUTE, 'c', WINDOW_ATTRIBUTE, 'e', WINDOW_ATTRIBUTE
|
||||
|
||||
section .bss
|
||||
text_window_data resw ROWS*COLUMNS
|
||||
|
|
|
|||
Loading…
Reference in New Issue