Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.lang.forth > #57270

Re: 6502 anyone ?

From rickman <gnuarm@gmail.com>
Newsgroups comp.lang.forth
Subject Re: 6502 anyone ?
Date 2017-04-14 01:21 -0400
Organization A noiseless patient Spider
Message-ID <ocpm2v$bqh$1@dont-email.me> (permalink)
References (1 earlier) <ock6so$33k$3@dont-email.me> <a1198ea9-473f-477c-b88b-4f95c5f53008@googlegroups.com> <ocmhji$1v27$1@gioia.aioe.org> <4add987c-dbd6-445d-baa7-a28fb9c18b17@googlegroups.com> <ocpe3m$9c8$1@gioia.aioe.org>

Show all headers | View raw

On 4/13/2017 11:01 PM, HAA wrote:
>
> Making the 6502 better would have entailed a total redesign.  The 6502 was built
> around small.  Lack of 16-bit regs, limited zero page and fixed stack all became
> problematic for larger apps.  Intel took the opposite approach when upgrading
> the 8008 to 8080.  The 8080 was well suited for writing an OS and apps such
> as language compilers.

I still have an 8008 computer somewhere.  It is amazing just how much 
impact that design had on all the following Intel CPUs.  The most 
obvious was the first three phases of the memory cycle were T1, T2 and 
T3.  These corresponded to the output of the two halves of the address 
and the data movement in the 8008, because it was packaged in an 18 pin 
DIP, so the 8 bit data bus was multiplexed for a 14 bit address and 8 
bits of data.  The next several generations of Intel CPUs had similar 
arrangements even though they had full size address buses although some 
multiplexed the data with the address like the 8085.

-- 

Rick C

Back to comp.lang.forth | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

6502 anyone ? john <anon@example.com> - 2017-04-11 13:07 +0100
  Re: 6502 anyone ? rickman <gnuarm@gmail.com> - 2017-04-11 23:31 -0400
    Re: 6502 anyone ? Mark Wills <markwills1970@gmail.com> - 2017-04-12 01:27 -0700
      Re: 6502 anyone ? Lars Brinkhoff <lars.spam@nocrew.org> - 2017-04-12 10:46 +0200
        Re: 6502 anyone ? Mark Wills <markwills1970@gmail.com> - 2017-04-12 01:57 -0700
          Re: 6502 anyone ? Lars Brinkhoff <lars.spam@nocrew.org> - 2017-04-12 12:24 +0200
          Re: 6502 anyone ? hughaguilar96@gmail.com - 2017-04-12 14:37 -0700
            Re: 6502 anyone ? lehs <skydda.barnen@gmail.com> - 2017-04-12 17:16 -0700
              Re: 6502 anyone ? hughaguilar96@gmail.com - 2017-04-12 18:10 -0700
                Re: 6502 anyone ? lehs <skydda.barnen@gmail.com> - 2017-04-12 23:46 -0700
                Re: 6502 anyone ? rickman <gnuarm@gmail.com> - 2017-04-13 03:00 -0400
                Re: 6502 anyone ? lehs <skydda.barnen@gmail.com> - 2017-04-13 00:37 -0700
                Re: 6502 anyone ? lehs <skydda.barnen@gmail.com> - 2017-04-13 00:42 -0700
                Re: 6502 anyone ? rickman <gnuarm@gmail.com> - 2017-04-13 12:57 -0400
                Re: 6502 anyone ? Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-04-13 12:01 -0500
                Re: 6502 anyone ? lehs <skydda.barnen@gmail.com> - 2017-04-13 10:42 -0700
                Re: 6502 anyone ? Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-04-13 12:55 -0500
                Re: 6502 anyone ? lehs <skydda.barnen@gmail.com> - 2017-04-13 11:13 -0700
                Re: 6502 anyone ? rickman <gnuarm@gmail.com> - 2017-04-13 14:24 -0400
                Re: 6502 anyone ? lehs <skydda.barnen@gmail.com> - 2017-04-13 11:57 -0700
                Re: 6502 anyone ? rickman <gnuarm@gmail.com> - 2017-04-13 15:15 -0400
                Re: 6502 anyone ? rickman <gnuarm@gmail.com> - 2017-04-13 14:23 -0400
        Re: 6502 anyone ? john <anon@example.com> - 2017-04-12 10:25 +0100
        Re: 6502 anyone ? albert@cherry.spenarnc.xs4all.nl (Albert van der Horst) - 2017-04-12 12:27 +0200
          Re: 6502 anyone ? Lars Brinkhoff <lars.spam@nocrew.org> - 2017-04-12 12:53 +0200
            Re: 6502 anyone ? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-04-12 12:55 +0000
              Re: 6502 anyone ? rickman <gnuarm@gmail.com> - 2017-04-12 12:20 -0400
          Re: 6502 anyone ? Mark Wills <markwills1970@gmail.com> - 2017-04-12 05:10 -0700
            Re: 6502 anyone ? Michael Barry <barrym95838@yahoo.com> - 2017-04-12 22:41 -0700
          Re: 6502 anyone ? Joel Rees <joel.rees@gmail.com> - 2017-04-13 02:14 -0700
            Re: 6502 anyone ? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-04-13 11:01 +0000
              Re: 6502 anyone ? jim.brakefield@ieee.org - 2017-04-13 06:33 -0700
                Re: 6502 anyone ? Mark Wills <markwills1970@gmail.com> - 2017-04-13 07:24 -0700
                Re: 6502 anyone ? Andrew Haley <andrew29@littlepinkcloud.invalid> - 2017-04-13 09:51 -0500
                Re: 6502 anyone ? anton@mips.complang.tuwien.ac.at (Anton Ertl) - 2017-04-13 17:16 +0000
                Re: 6502 anyone ? hughaguilar96@gmail.com - 2017-04-13 13:08 -0700
              Re: 6502 anyone ? Joel Rees <joel.rees@gmail.com> - 2017-04-14 08:06 -0700
            Re: 6502 anyone ? rickman <gnuarm@gmail.com> - 2017-04-13 13:00 -0400
      Re: 6502 anyone ? "HAA" <someone@microsoft.com> - 2017-04-13 10:42 +1000
        Re: 6502 anyone ? hughaguilar96@gmail.com - 2017-04-12 18:45 -0700
          Re: 6502 anyone ? "HAA" <someone@microsoft.com> - 2017-04-14 13:01 +1000
            Re: 6502 anyone ? rickman <gnuarm@gmail.com> - 2017-04-14 01:21 -0400
            Re: 6502 anyone ? hughaguilar96@gmail.com - 2017-04-13 23:23 -0700
    Re: 6502 anyone ? john <anon@example.com> - 2017-04-12 10:08 +0100

csiph-web