TRS-80 video synch chaos

From: Doug Spence <ds_spenc_at_alcor.concordia.ca>
Date: Fri Jun 26 01:16:09 1998

On Sun, 21 Jun 1998, Tony Duell wrote:

> > on my C=1802 but I suspect that would still be the case even if I had a
> > proper video cable. (That CHR$(23) trick for fat letters is pretty cool.)
>
> Ah yes... Look at alternate characters in screen memory... (There are
> tricks which involve convincing BASIC that it's in 32 col mode and
> forcing the hardware to 64 col mode to get alternate letters and spaces
> on the screen).

Well... please tell me what these tricks are! :) I did notice in 32
column mode that the "PRINT _at_" command still thinks it's in 64 column
mode. (I wrote my traditional 'dump memory to screen' program as soon as I
could see what was going on.)

> As I've said before you don't need that many tools. A good set of hand
> tools, a soldering iron + solder sucker, a multimeter (analogue or
> digital) and a logic probe are enough for most work.

I don't even know what a logic probe is, and I only learned since I've
been reading this list that I don't know how to use a soldering iron (hey,
heating the SOLDER until it melts to the contacts has worked _so_far_ ;)
).

Actually, I WAS using an old wood burning kit, but the copper (or brass?)
tip gets dirty WAAAAY too fast. So a year or two ago I finally picked up
something intended for soldering - but it's too wimpy (15W). I also
picked up a solder sucker, but it's a bulb type with a heating element at
the end, and it doesn't work very well. Maybe I just need more patience
with it.


Doug Spence
ds_spenc_at_alcor.concordia.ca
http://alcor.concordia.ca/~ds_spenc/
Received on Fri Jun 26 1998 - 01:16:09 BST

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