pdf first page to image c# : Adding text fields to pdf acrobat application SDK cloud html wpf winforms class AtariSTworkshop20-part1511

Atari ST workshop 2
1/37
Atari ST knowhow
Workshop 2:
Hardware and software hacks
Note that the original presentation uses special effects
which are not rendered in this PDF.
Adding text fields to pdf acrobat - C# PDF Field Edit Library: insert, delete, update pdf form field in C#.net, ASP.NET, MVC, Ajax, WPF
Online C# Tutorial to Insert, Delete and Update Fields in PDF Document
android edit pdf forms; change font size in fillable pdf form
Adding text fields to pdf acrobat - VB.NET PDF Field Edit library: insert, delete, update pdf form field in vb.net, ASP.NET, MVC, Ajax, WPF
How to Insert, Delete and Update Fields in PDF Document with VB.NET Demo Code
chrome save pdf with fields; add fillable fields to pdf online
Atari ST workshop 2
2/37
What Hardware?
ROM
RAM
keyboard
MIDI
MFP
CPU
Glue
MMU
shifter
FDC
DMA
YM2149
VB.NET PDF: How to Create Watermark on PDF Document within
Via our PDF Watermark Creator, users are capable of adding a designed watermark and customizing it on many aspects, for example, typing any text word and
can reader edit pdf forms; pdf create fillable form
VB.NET PowerPoint: VB Code to Draw and Create Annotation on PPT
other documents are compatible, including PDF, TIFF, MS in offering full options on adding and creating hand, free hand line, rectangle, text, hotspot, hotspot
create pdf form; create a pdf form from excel
Atari ST workshop 2
3/37
Add RAM, RTC, HD, VIDEO...
Atari ST workshop 2
4/37
Software hacks?
Need to know:
CPU
Memory layout
Video modes
Peripheral registers
Atari ST workshop 2
5/37
The CPU
MC68000 @ 8Mhz
Orthogonal?
56 instructions / 14 address modes / 16 registers
almost combinable each with each one
Attention: big-endian (i.e. not Intel)
32 bit (but 16 bit bus)
User mode / system mode
Atari ST workshop 2
6/37
68000 assembly
Instructions
Bcc, BRA, BSR, RTS, JMP, DBcc
MOVE, MOVEQ MOVEM, MOVEP
ADD, SUB, MUL, DIV
AND, OR, EOR, NOT
ASL, LSL, ROL, ROXL
BTST, BSET, BCLR, BCHG
SWAP, *BCD
* SR, TRAP, TAS
And many more....
Address modes
Dn
An
(An)
(An)+
-(An)
x(An)
x(An,Dn)
xxx.W
xxx.L
x(PC)
x(PC,Dn)
#xxx
SR
Atari ST workshop 2
7/37
Memory layout & privileges
00 0000   | ROM            |   Reset:  Supervisor Stack Pointer
00 0004   | ROM            |   Reset:  Program Counter
00 0008   | RAM            |   0 Kbyte RAM
00 0800   | RAM            |   2 Kbyte RAM             (start of user ram)
08 0000   | RAM            |   512 Kbyte RAM
10 0000   | RAM            |   1 Mbyte RAM
----------------
fa 0000   | ROM            |   320 Kbyte ROM
----------------
----------------
fc 0000   | ROM            |   Reset:  Supervisor Stack Pointer
fc 0004   | ROM            |   Reset:  Program Counter
fc 0008   | ROM            |   192 Kbyte ROM
fe ffff   | ROM            |   0 Kbyte ROM
----------------
----------------
ff 8000   | I/O            |   Configuration Registers
ff 8200   | I/O            |   Display Registers
ff 8400   | I/O            |   Reserved
ff 8600   | I/O            |   DMA/Disk Registers
ff 8800   | I/O            |   Sound Registers
----------------
----------------
ff fa00   | I/O            |   MC68xxx Registers
ff fc00   | I/O            |   MC68xx Registers
----------------
Supervisor mode
User mode
http://www.atari-forum.com/viewtopic.php?f=68&t=10137#p79672
Gemdos 32: Super(long stack)
pea stack
move.w #$20,-sp
trap #1
Xbios 38: Supexec(long codeptr)
pea codeptr
move.w #$26,-(sp)
trap #14
addq.l #6,sp
and     #$fff,SR
Gemdos 32: Super(long stack)
pea stack
move.w #$20,-sp
trap #1
Gemdos 32: Super(long stack)
pea stack
move.w #$20,-sp
trap #1
Gemdos 32: Super(long stack)
pea stack
move.w #$20,-sp
trap #1
Atari ST workshop 2
8/37
Video chip
Nice mix between shifter MMU and Glue
Restriction: the screen base address has the low 
byte always $00, i.e. only 256 byte frontier
Restriction: changing base address only has effect 
on next frame
No direct colors on screen, but indexes into 16 
colors palette
Changing color value has immediate effect
Think GIF but 16 instead of 256 colors
Atari ST workshop 2
9/37
VIDEO memory
Word interleaved with color lookup table
Memory layout
320x200x4=256000bit=32000 bytes
Grafic bitplanes
1
st
pixel is composed of
high order bits from words 0-3
(that's not GIF anymore)
word 1
word 2
word 3
word 4
word 5
word 6
word 7
word 0
Atari ST workshop 2
10/37
Colorcycling / screen changing
Uses no CPU
Uses no additional RAM
Very basic step animation 
up to 16 frames
=> neochrome pictures
512K RAM allows
16 different pictures
1MB has 32 steps
Complex animations
=> shiny bubbles demo 
Both can be combined
=> pandemonium acid screen
Documents you may be interested
Documents you may be interested