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

7 Oct 2001

On 7 Oct 2001 1:36:56 +0100 "Iggy Drougge" &lt;optimus(a)canit.se&gt; said:
...
  Philip Pemberton skrev: 
...
  >I've got two Western Design Center W65SC02s
(14MHz >6502s! Woohoo!) to play
...
  >with, plus a Synertek SY6502A (the 2MHz one), two
W65SC22s (10MHz WDC 6502s)
...
  and two
Synertek 6522s (1MHz).  14 MHz? You're kidding! That's criminally fast!
I kid you not! Go to www.6502.org, grab the datasheet for the W65SC02 and
look at page 43.
For $4, it's bloody good value. Anyone care to start another bulk-buy? Maybe
Mike Nabarezny (sp?), webmaster of 6502.org and the guy who did the original
6502 Bulk Order would care to do another one?

...
  >    2) Has anyone got a schematic for a fairly
half-decent 16-colour (or
 >better) video card that can be modified to work on a 6502? I've had a look
...
  >at the NASCOM schematics but I've heard Bad
Things(tm) about the NASCOM
 >video system. Aparrently Gemini and a few others produced colour video cards
...
  >for the NASCOM. Anyone got schematics for these?
Graphics would also be nice
...
  (the NASCOM
video system is text only).  Tony mentioned teletext chips a few days ago. Don't
know if those perhaps are
...
  only 8-colour, though. Tony? I've got an
SAA5050. Anyone know how to use it without the SAA5020 timing
generator?
I've also got a Microvitec Cub 653 monitor. TTL input, composite sync. How
can I get Csync from Vsync and Hsync?

...
  >    BTW, I'd like to avoid obsolete components
if that's at all possible.
 >I've got a Hitachi HD6845 but if the 40-odd page datasheet is anything to
go
...
  >by, it's a real dog to use... And it only
works in monochrome. I have got a
...
  >MOS Tech 6568(?) VIC-II, the same one used in the
UK Commodore 64. The PSU
...
  for this C64 is
fried, took out some of the support components with it.  The VIC is quite
well-documented, and it would certainly be interesting to see
...
  it in a non-C64, 14 MHz 6502 system. =) I doubt
a VIC will run at 14MHz.

Later.

--
Phil.
philpem(a)bigfoot.com
http://www.philpem.f9.co.uk/