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-
- VIC-20 Emulator
- (Very brief Read.Me)
-
- Why: Because I didn't had a C64 but a VIC-20 before I bought
- an Amiga and to remember 'the good old days' I had to write
- my own emulator. So here it is ......
-
- HowToUse:
-
- This package contains two binairies:
-
- vic-00: For the 68000 amigas
- vic-20: For the >=68020 amigas
-
- Usage:
-
- vic-x0 [-k n] [-s n] [$xxxx file ....]
-
- -k n number of Vertical Screen interrupts between
- the VIC-interrupts for the Keyboard.
- (default = 5 (10 per second. Real = 60 per second))
-
- -s n number of Vertical Screen interrupts between
- two screen-updates.
- (default = 12 (4 per second))
-
- $xxxx Start address where following file must be loaded.
- E.g. vic $8000 char.rom
- places the char.rom-file on address $8000 in the
- VIC-memory map.
-
- There are 2 special filenames:
- ramx: add ram on the specified address. X stands
- for the size of the memory in Kbytes.
- E.G. vic $2000 ram8
- Add 8K ram to standard vic
-
- nopx: Define from address to address + x * 1024
- no ram/rom/io. This can be used to overwrite
- default values which are defined in the
- vic-config file.
- E.G. vic $0400 nop3
- Removes 3K which is defined in the vic-config file.
-
- The default memory map of the vic can be defined on two ways:
-
- 1) Vic-config: (When started from CLI)
- The 'vic-config' file contains the memory-map.
- Each line contains one address and a file.
-
- E.G.
- $8000 char.rom
- $c000 basic.rom
- $e000 kernal.rom
-
- $0400 ram3 (add 3K ram)
- $2000 ram8 (add 8K ram)
-
- 2) vic.icon: (When started from WorkBench)
- The address and file are defined in the tooltypes
-
- E.G.
-
- $8000=char.rom
- $c000=basic.rom
- $e000=kernal.rom
-
- (See examples)
-
- It's also possible to define a project-icon to
- load other files into the memory.
-
- The default-tool is vic-00 (or vic-20).
-
- ToolTypes should be defined as described above.
- The ToolTypes mentioned in the project icons
- have a higher priority as the default ToolTypes.
-
-
-
- Loading of basic programs:
-
- Type LOAD when the emulator is started.
- With the file-requester it's possible to choose
- the file which you want to load.
-
- With SAVE "filename",8 it is possible to save
- a program.
-
- (See for more information about how to load a program
- the file Load)
-
-
- Keys: Because the key-matrix is implemented very straight
- forward not all keys have a logical place on the Amiga
- keyboard. The most important differences are shown below:
-
- VIC | Amiga VIC | Amiga
- -------+--------- --------+--------
- F2 | SHIFT-F1 " | @
- F4 | SHIFT-F2 + | -
- F6 | SHIFT-F4 - | =
- F8 | SHIFT-F5 = | F10
- <- | ` (~) & | ^
- ' | & ( | *
- ) | ( HOME | <- (BackSpace)
- @ | [ * | ]
- : | ; [ | :
- ; | ' ] | "
- STOP | CTRL C= | ALT
- BACK-SP| DEL CTRL | TaB
-
- And of course you have to press SHIFT -> to move the
- cursor to the left and SHIFT V(arrow-down) to move the
- cursor upwards.
-
- Speed: On a 68000 system the next program takes 8.8 seconds
-
- 10 FORI=1TO2000
- 20 NEXTI
-
- Please send information about other systems!!!
-
- Working Games:
- APE_ESCAPE CAVE_IN CHOPLIFTER.SYS_40961
- COSMIC-CRUNCHER COSMIC-JAILBREAK GOLD_FEVER
- MAZE MENAGERIE MOSQUITOS
- ORBIT PACMAN.ATARI PREDATOR
- QUAKERS RAT_RACE ROADRACE
- ROBOT_PANIC SARGON_II SATELLITE_PATROL
- SCORPION SERPENTINE TERRAGUARD
- TRASHMAN VC-EXTRA (No Game) VIDEOMANIA
- BUCK_ROGERS DEFENDER K-RAZY
- LODERUNNER POLE_POSITION ROBOTRON
- STAR_PATROL UBOOT-COMMANDER SUPER_AMOK
-
- Not Working Games:
- ARACHNOID (Only intro screen)
- CATCH_A_SNATCH
- CENTIPEDE
- CLOWNS (Only intro-screen)
- ET
- FAST_EDDIE
- GORF (Only First 2 levels are working. Timers not emulated)
- KONG
- MONEY_WARS (Only Intro Screen. Keys are not recognized)
- STARPOST (Joystick and Keyboard are not working??)
- TURMOIL (Only first screen)
- WACKY_WAITERS_SYS48896 (Works sometimes)
-
- Programs:
- Vic-programs can be found on:
-
- ftp.hrz.uni-kassel.de (/pub/machines/vic-20)
-
- and
-
- nic.funet.fi (/pub/cmb/vic ??)
-
- Todo: Improve disk-support.
- Implement 'White Noise'.
- Implement NMI. (restore key)
- Improve interrupts.
- Emulate VIA's.
- Improve Key-mapping
- Make it faster. (or slower when it goes to fast)
- Improve docs.
-
-
- Thanks: Yacco de Leeuw who supplied the ROM-images
- Frank van Leeuwen for giving hints for optimizing
- the 6502-code
- Roeland Kamps for the video optimizing and the other
- optimizing tricks
- Andreas Heitmann for transfering cartridges to files
- Paul Kolenbrander and his A4000 who showed me the first
- 8MHz VIC ;-).
-
- Bug reports, remarks, improvements, $$ (not by E-mail) or
- comments (also positive):
-
- E-Mail etmpile@crosby.ericsson.se
-
- or
-
- Pieter van Leuven
- Kloosterstraat 130
- 5688 HT Oirschot
- Netherlands
-