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- Path: conch.aa.msen.com!not-for-mail
- From: brain@mail.msen.com (Jim Brain)
- Newsgroups: comp.sys.cbm
- Subject: Re: Vic-20 Ram Expansion
- Date: 1 Apr 1996 23:04:29 -0500
- Organization: Msen, Inc. -- Ann Arbor, MI
- Sender: brain@msen.com
- Message-ID: <ztHYxwyjtcYY088yn@mail.msen.com>
- References: <4jnplp$3l8$1@mhade.production.compuserve.com>
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-
-
- In article <4jnplp$3l8$1@mhade.production.compuserve.com>,
- Dan Amborn <103013.1114@CompuServe.COM> wrote:
- >I have a question about Vic-20 ram expansion and was wondering if
- >anyone has some experience with it. I've got a 16k cartridge but
- >whats needed in order to have a fully expanded Vic? I saw that
- >24k was the largest cartridge for it. But a memory map I
- >downloaded from the internet showed this:
- >
- >>0400-0FFF 1024-4095 3K expansion RAM area
- >1000-1DFF 4096-7679 User Basic area
- >1E00-1FFF 7680-8191 Screen memory
- >>2000-3FFF 8192-16383 8K expansion RAM/ROM block 1
- >>4000-5FFF 16384-24575 8K expansion RAM/ROM block 2
- >>6000-7FFF 24576-32767 8K expansion RAM/ROM block 3
- >
- >According to this in order to have a fully expanded Vic-20 you
- >need a 27k cartridge which doesn't exist right? Or is it possible
- >to use multiple expansion cartidges by using a cartridge port
- >expander. Also does anyone know if its possible to expand my
- >existing cartridge to 27k? Any help would be helpful.
- Get a multislot expander, buy a 3K cartidge (the CBM one), then get a
- 32kB unit. They were made at some point. There is a a000-bfff blcok called
- ROM expansion block 5. That can have RAM there.
-
- Now, with all the RAM installed, lament, because you can only use from 4608-
- 32767, or 28kB. The 3kB area and ROM bank 5 are only usable from ML.
-
- Jim
-
-
- --
- Jim Brain, Embedded System Designer, Brain Innovations, Inc. (BII)(offline sig)
- brain@mail.msen.com "Above views DO reflect my employer, since I'm my employer"
- Dabbling in WWW, Embedded Systems, VR, Old CBM computers, and Good Times! -Me-
- <a href=http://www.msen.com/~brain/>Jim Brain: BII, VR, and CBM info</a>
-