download the package with used files and compilers from here: https://media.henriaanstoot.nl/assembly.tgz
extract with tar xzvf /tmp/assembly.tgz to a directory
start dosbox and mount the directory as C
mount c /path/assembly
Run “a line”, this a batchfile which starts the editor (qedit) When closing the file (esc – q menu) It will compile the assembly and write out a executable
This is the batchfile
@echo off
q %1.asm
cls
masm %1.asm;
link %1.obj;
exe2bin %1.exe %1.com
echo READY!
line assemblycode
NAME lijnentrekroutine
.286
Code SEGMENT
ASSUME CS:Code,DS:Code
org 100h
Start:
mov ax,13h ;set video mode
int 10h
mov bx,100
mov cx,100
hiero:
mov dx,0a000h
mov es,dx
mov ax,320
mul cx
add ax,bx
mov di,ax
mov al,2
stosb
inc bx
inc bx
inc cx
cmp bx,150
jnz hiero
mov ah,8
int 21h
mov ax,3
int 10h
MOV AX,4C00h
INT 21h
code ends
end start
While playing with MuseScore…. (Typesetting some scores for Pipes and Flute)
This came in: WOOOT
Trident 8900C (1024 x768 max 512Kb)
This is a Trident VGA card. While having a 16bit ISA connector, it can work in a 8bits ISA slot.
A while ago i bought a Laser XT/3, that’s the one my parents had. This is where i did a lot of assembly programming on. It’s a 8086 cpu, 640K and has a Hercules/CGA graphics card.
I found loads of assembly files and i want to see if i can get it running again. While some code was written for hercules, ( That’s the monochrome image you see in the example above ) and a few for EGA (4 colors).
Most of it was written for VGA. Probably on a later machine like a 80386?
But i know there are vga cards for 8 bit msdos computers, and i found one. ( This one is even autodetect, so no jumpers to figure out)
So i’ve put this card in the machine, turned it on, and it works! I’ve got only 2 examples living on the harddisk of the machine, both black and white … 🙂 I have to search for interesting code in hundreds of files.
Some friends of mine, picture was taken from an amiga genlock digitizerThe intro pages of a “amiga emulator” WHERE is the rest??? (end is a cga starfield demo)
And a boot demo, which was able to start from a bootsector, went into a graphic mode and ran a demo with sound. Edk wrote a sector loader for this. I have some 5.25 inch floppy disks, labelled boot demo. So i wanted to try this today … I needed to change the boot order, so i went online to search for jumper settings.
I see a led when it tries to boot, but my disks are probably formatted 720Kb instead of 360Kb, which this drive is.
So …. TODO!
Find a 720Kb floppy drive (5.25 inch), and sort through my code! There is a 8bit soundblaster compatible soundcard that i bidding on online, hopefully i’ll get it
Assembly and modes
I wasn’t sure how to sort the assembly code into Hercules and VGA compatible, but i used this table (There are also extended modes for higher resolutions)
mode 0x00
text 40×25 gray
mode 0x01
text 40×25 16 colors
mode 0x02
text 80×25
mode 0x03
text 80×25 16 color
mode 0x04
graphics mode (CGA) 320×200
mode 0x05
graphics mode (CGA) 320×200
mode 0x06
graphics mode (CGA) 640×200 (B/W)
mode 0x07
text 80×25 Hercules
mode 0x0F
graphics mode 640×350? gray
mode 0x10
graphics mode 640×350?
mode 0x11
graphics vga 2 colors
mode 0x12
graphics vga 16 colors
mode 0x13
graphics 320×200 256 colors
# Set VGA mode
mov ax,13h
int 10h ;screen 320x200 256 colours
# Exit VGA mode
mov ax,3
int 10h ;screen 80x25 text
mov ax,4c00h
int 21h ;back to DOS
Sometimes when i’m writing code i want to know what’s happening. For example when i’m working on the display, there is maybe no output. With the above example i can write to address $01F0 (example address), and it will display on the 7 Segment displays.
Upperleft PLD is my address decoder, which has been running for a while now.
Secondary PLD adds the rest of the Addressbus lines, and gives me the opportunity to select in a range of 16 addresses, using jumpers/
The two smaller PLD’s latch the databus data when addressed. AND decodes a nibble to 7-Segment output for 0-9A-F. (There are apparently no chips available which do A-F)
I’m going to add the PLD code when everything works. Let me know if you like the idea.
No more sync issues! (see post https://www.henriaanstoot.nl/2022/10/19/composite-video-with-atmega328p/ )
There are some duplicate characters, the input device below does not have a proper debounce method.
My temporary input device (note hex 21 is a “!” character)
No need to fix the debounce, the dipswitches are temporary. This will be controlled by the VIA 6522 chip.
UPDATE 20221108 (Connected to second VIA)
PORTB = $5000
PORTA = $5001
DDRB = $5002
DDRA = $5003
clock = $e0
E = %10000000
RW = %01000000
RS = %00000000
.org $0200
reset:
ldx #$ff
txs
lda #%11111111 ; Set all pins on port B to output
sta DDRB
lda #%10000000 ; Set top pin on port A to output
sta DDRA
lda #$00 ; reset bit
sta PORTA
sta clock
ldx #0
print:
lda message,x
beq printborder
jsr print_char
inx
jmp print
loop:
jmp loop
message:
.db 0x01,0x04,0x0C,0x0E,0x10,0x0F,0x08
.db 0x05,0x0a,0x0a
.db 0x05,0x0b,0x0b
.asc "Composite Video 6502 - 20221108"
.db 0x0E,0x11,0x0F,0x0C
.asciiz " With 2 pixels "
waitloop:
pha
tya
pha
ldy #$ff
back:
dey
bne back
pla
tay
pla
rts
print_char:
sta PORTB
jsr waitloop
jsr waitloop
lda clock
eor #%10000000
sta clock
sta PORTA
jsr waitloop
lda clock
eor #%10000000
sta PORTA
jsr waitloop
rts
Control codes as from : http://searle.x10host.com/MonitorKeyboard/index.html
Video display control codes:
Hex (Decimal) and meaning
01 (01) - Cursor home (Standard ASCII)
02 (02) - Define cursor character (2nd byte is the curs character, or 00 to turn off) <--New for 3.0
03 (03) - Cursor blinking
04 (04) - Cursor solid
05 (05) - Set graphics pixel (next two bytes = x,y) <--New for 3.0
06 (06) - Reset graphics pixel (next two bytes = x,y) <--New for 3.0
08 (08) - Backspace (Standard ASCII)
09 (09) - Tab (Standard ASCII)
0A (11) - Linefeed (Standard ASCII)
0C (12) - Clear screen (Standard ASCII)
0D (13) - Carriage return (Standard ASCII)
0E (14) - Set column 0 to 79 (2nd byte is the column number) or 0 to 39 for a 40 char line
0F (16) - Set row 0 to 24 (2nd byte is the row number)
10 (16) - Delete start of line
11 (17) - Delete to end of line
12 (18) - Delete to start of screen
13 (19) - Delete to end of screen
14 (20) - Scroll up
15 (21) - Scroll down
16 (22) - Scroll left
17 (23) - Scroll right
18 (24) - Set font attribute for the current line (see elsewhere on this page for details) <--New for 3.0
1A (26) - Treat next byte as a character (to allow PC DOS char codes 1 to 31 to be displayed on screen)
1B (27) - ESC - reserved for ANSI sequences
1C (28) - Cursor right
1D (29) - Cursor Left
1E (30) - Cursor up
1F (31) - Cursor down
20 (32) to 7E (126) - Standard ASCII codes
7F (127) - Delete
80 (128) to FF (255) - PC (DOS) extended characters
I’m using a windows program for typesetting bagpipe music. Luckily this runs on Linux using wine.
Sometimes i just want a PDF version of a tune, for example for my tunebook compiler. (Other post) Or i want to batch convert a lot of bww files.
A long time ago i used a virtual machine with automation software for this. Why not automate the process on my Laptop?
So i made this script, with a workaround for the xdotool wine problem. (wine window needs to be active to accept key strokes, other linux xwindows you can use the ID of the window)
#!/bin/bash
# use c for close at the end, without c bgplayer wont be shut down
# bww2pdf path/to/music.bww c
# make tmp file
cat "$1" > /tmp/deze.bww
# start bgplayer if not started .. if not started wait 3 secs
slp=0
pgrep BGPlayer.exe >/dev/null || slp=3
pgrep BGPlayer.exe >/dev/null|| ( nohup wine ~/.wine/dosdevices/c\:/Program\ Files\ \(x86\)/Bagpipe\ Player/BGPlayer.exe & )
sleep $slp
# get program id
pid=$(pgrep BGPlayer.exe)
# get xwindow id using pid
winid=$(xdotool search --limit 1 --all --pid $pid)
# activate window
xdotool search --desktop 0 --class "BGPlayer.exe" windowactivate
# open file menu and Open file
xdotool key --window $winid "alt+f"
xdotool key --window $winid "o"
# give program time to execute
sleep 1
# open our tmp file
xdotool type '\tmp\deze.bww'
xdotool key KP_Enter
sleep 2
# open file menu select Print and PDF as output
xdotool key "alt+f"
xdotool key "p"
xdotool key "P"
sleep 2
# execute
xdotool key KP_Enter
sleep 1
# File close
xdotool key "alt+f"
xdotool key "c"
sleep 2
# close program when c was added to commandline
mv ~/PDF/deze* "$1.pdf"
if [ "$2" == "c" ] ; then
xdotool key "alt+f"
xdotool key "x"
fi
I’m not touching the keyboard when the program is running, all handled by the script
Getting 433Mhz dimmers working under HA is a pain in the *ss.
After moving my Rfxcom from domoticz to HA, there was still no good way to add dimmers. I’ve tried adding switches and migrating them to lights, but it didn’t work.
So i took another approach.
Domoticz has a good 433 to mqtt plugin. So i used NodeRed to talk to HA and Domoticz via MQTT.
I use a bunch of different tools to create video’s or stream stuff. Below is some info about those tools.
Software:
Kdenlive – Linear video editor (Adding text, transitions, etc)
VLC media player – For example to embed video in OBS
OBS – Opensource Broadcast software, i use this also to record my screen – You can use this as a virtual webcam, so you can fool around with the image.
Audacity – For editing audio
QPrompt – Teleprompter
For OBS i made a shortcut/macro keyboard thingy. Based on an arduino pro mini. (Which can connect to a computer acting like a HID, for example a keyboard or mouse) I use this one to emulate keystrokes which i’ve configured in OBS to do:
Switch to scene 1
Switch to scene 2
Transition from scene to scene
Start streaming
Start recording
Mute
[empty] – sometimes used as “start virtual webcam”
Slow transition
Blank screen
Display overlay text
(Originally i planned to do this with a Nextion Display)
Mobile Phone holder, like a third hand
Sometimes a Nikon on a tripod is better.
Chromakey / Green screenPortable versionGreen screens .. loads of funVideo grabbers
I don’t have a dedicated webcam for my battlestation. So i mainly use a Actioncam (4k) which can be connected via USB. Or i use a Nikon together with the Camlink.
So i record using my mobile, webcam, screen record Edit using Audacity and Kdenlive.
When recording with OBS i use MP4 as a container, this is a no-brainer to embed in websites. Use mkv when recording long shots, or when connections can break. (A mp4 will be corrupted)
Composite video print designed and ordered from china.
Changed some vlans in my network. I need to think of a way to extract/migrate domoticz 433 info into a new instance. For example .. i’ve got some instances in my device list which are only being controlled by domoticz, there is no remote i can reuse.
Tried welding again, because i could not do it for a long time, i noticed i have to practice again after 2 years. (I’ve got a dedicated power outlet outside now .. 🙂
Last 8mm films work done. (Converted all of my dad’s old 8mm reels)
Designed a hidden remote cabinet, holding remotes out of sight for the occasions when automation doesn’t work.
Designed also a wooden wall with hidden cabinets in our bedroom.
Repaired a Gardena Leafblower .. again!
"If something is worth doing, it's worth overdoing."
