6502 BASIC or Assembler and Intel 8271/WDC 1770 info req'd - test-drb@ccmp.vtda.org

5 Oct 2001

The 8271 is a poor choice as it does not do MFM (double density).
Either use 8272 or the 1770 you have.  The 1770 does not overclock
reliably.
Allison
-----Original Message-----
From: Philip Pemberton &lt;philpem(a)bigfoot.com&gt;
To: classiccmp(a)classiccmp.org &lt;classiccmp(a)classiccmp.org&gt;
Date: Friday, October 05, 2001 12:20 PM
Subject: 6502 BASIC or Assembler and Intel 8271/WDC 1770 info req'd
...
 Hi,
    I'm building myself a 6502-based single-board computer, with the aim of
...
 running it off a 4.8V NiMH or NiCad battery pack. But
I've got a problem. I
...
 need a programming language for it. Aparrently there
were many BASIC
interpreters sold for the Synertek SYM-1 (aka SY-VIM-1), MOS KIM-1 and
Rockwell AIM-65. Anyone know what happened to the companies that produced
...
 these? Ideally I'd like the source code for a 6502
BASIC interpreter, but
...
 binary code would be OK too. The SBC will communicate
via a small LCD panel,
...
 RS232 (so I can hook it up to a "dumb
terminal") and will have a hexadecimal
...
 keypad and an optional hard drive, too. Anyone care to
make any suggestions
...
 (or submit some code)?
BTW, I also need some info on the Intel 8271 disk controller - I've got two
...
 of these little devils and Intel's datasheet makes
absolutely no sense at
...
 all. I've also got a Western Digital WD1770-PH
00-02 that I might be able to
...
 use instead. First of all, which is the better
controller? The 8271 or the
...
 1770? Also, is it possible to overclock a 1770 or an
8271 like you can a
1772?
I'd love some schematics and/or some source code. I really don't fancy
disassembling Acorn's 8271 DFS and Watford Electronics' 1770 DFS...
Thanks.
--
Phil.
philpem(a)bigfoot.com
http://www.philpem.f9.co.uk/