6502 BASIC or Assembler and Intel 8271/WDC 1770 info req'd

From: Philip Pemberton <philpem_at_bigfoot.com>
Date: Sun Oct 7 16:36:39 2001

On 7 Oct 2001 1:36:56 +0100 "Iggy Drougge" <optimus_at_canit.se> 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_at_bigfoot.com
http://www.philpem.f9.co.uk/
Received on Sun Oct 07 2001 - 16:36:39 BST

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