home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Commodore Free 9
/
Commodore_Free_Issue_09_2007_Commodore_Computer_Club.d64
/
t.vic cart
< prev
Wrap
Text File
|
2023-02-26
|
3KB
|
108 lines
u Vic-20 Multi-Cart
Prototype Project
www.bjlyons.com/cbm/vic20/multi cart/
Project is based on concept that
originated during discussions at WOC
show in Dec 2006.This concept became a
discussion item on an Internet
discussion forum devoted to Vic-20
topics "Denial"
http://sleepingelephant.com/denial The
Multi-cart is intended to allow a user
to run multiple Vic-20 ROM images from
a single cartridge. This design builds
on original concept to add features
and functions
1. Concept Allow multiple ROM
images to be accessible from single
cartridge Reduce physical storage
requirements of having multiple carts
Greater portability to take cartridge
collection with you when you are on
the go Reduce number of times a
cartridge is inserted & removed from
Vic-20
2. Project Features Ability to
run up to 255 - 8K ROM based Vic-20
Cartridge games or utilities Support
for 4K, 8K, 12K, & 16K ROM games
Support for all known ROM images,
irrespective of location of ROM image
in Vic-20 memory map Toggle from game
to menu and back to game again via
reset button RAM expanded mode with
additional 32K RAM 28,159 bytes
directly available to Basic (3,583
core memory + 24,575 expanded) plus
8,192 bytes addressable by Basic for
storage of variables, arrays, etc.
Ability to switch to unexpanded Vic-20
Basic mode without removal of
cartridge System reset via software
control or push button switch Bank
switching between RAM & ROM Expanded
RAM may remain hidden from kernel on
start up and enabled via software
control V no video memory address
change from defaults Software
controlled write inhibit logic for R/W
line on expansion RAM - no clumsy
switches 150+ Games & Utilities
currently loaded and fully functional
(25% of EPROM capacity still available
for further images)
3. Credits
Hardware Design: Brian Lyons
Menu Software : Andres Carlsson
Testing: Andres Carlsson Robin Harbron
Hardware Concept & Ideas
Leif Bloomquist
Francois Leveille
Mark G. V aka saundby
Rom Images and Organisation
Leo - AKAKillrpilr
NBLA000
Brent Santin
4. Current Status Menu under
development via project on Denial
discussion forum Updates may be found
on Denial V
http://sleepingelephant.com/denial or
Hardware project page
http://www.bjlyons.com/cbm/vic20/multi
cart/
Commodore free Comments
Brian Lyons sent me an email informing
me about this project and said if I
have free space to include it in
Commodore Free magazine, so I did. I
emailed Brian in the hope of an
interview about the project and an
update but haven't heard anything from
him so if you are reading Brian can
you contact me again I would love to
cover more about this project.
Maybe it was just that my emails have
been blocked by your spam filters
Thanks
commodore Free
Anyone else If you have a project
hardware or software let me know so I
can tell everyone else about it Thanks
...end...
www.commodorefree.com