kwf@ncsu.UUCP (01/08/86)
I use the FAST LOAD cart. by EPXY (and recommend is highly) on my c64. It
works well, however, it must be removed for some software packages to run.
I want to install a switch on my c64 which will allow me to prevent the
auto-start of a cart. (like FAST LOAD). I hope this will reduce the strain on
the expansion port connector.
My question is this: Does anyone know how the c64 determines whether an
auto-start cart. is in the expansion port?
I suspect that it simply checks the GAME and/or EXROM lines. If so, I should
be able to install a switch that will ground these lines, making the auto-start
cart. invisible to the c64.
If anyone knows, please reply by mail.
thanks in advance.
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Kenneth Fernald
decvax!mcnc!ncsu!kwfmike@cucca.UUCP (Mike Ardai) (01/12/86)
Newsgroups: net.micro.cbm Subject: Re: expansion port question Summary: preventing auto-boot References: <2970@ncsu.UUCP> Reply-To: mike@cucca.UUCP (Mike Ardai) Organization: Columbia University Center for Computing Activities The 64 determines whether you have an auto-boot rom by looking at location $8000 at powerup. (see page 263 of the programmer's reference guide). To eliminate the auto boot, you just have to prevent the kernal from accessing rom at powerup. this can be done by placing a normally-closed pushbutton in series with the power lead to the cartridge and hold it down during power-up or cold boots. If you don't press the button, the 64 will boot from the cartridge. If you are not a hardare hacker, most expansion boards come with this switch installed. Michael L. Ardai Columbia University Center for Computing Activities rom at po
dwl10@amdahl.UUCP (Dave Lowrey) (01/13/86)
In article <2970@ncsu.UUCP>, kwf@ncsu.UUCP writes: > > I use the FAST LOAD cart. by EPXY (and recommend is highly) on my c64. It > works well, however, it must be removed for some software packages to run. You don't need to remove the cartridge to disable FAST LOAD. When you power up, type the british pound sign, then return. This will put you in the FAST LOAD menu. Then type a D (for disable). This will re-boot the 64, but the FAST LOAD stuff is gone. -- ------------------------------------------------------------------- Dave Lowrey "To vacillate or not to vacillate, that is the question.... ....or is it?" ...!{ihnp4,cbosgd,hplabs}!amdahl!dwl10 [ The opinions expressed <may> be those of the author and not necessarily those of his most eminent employer. ]
mykes@3comvax.UUCP (Mike Schwartz) (01/22/86)
Cardco makes a bus extender that lets you plug in a few cartridges at once. There are switches on it to enable any cart you want. It costs a few $$, but works fine. I have reverse engineered the FastLoad cartridge and can give details of how it works (if I get enough E-Mail requests, I will post a bunch of details).