24 Sep
1999
24 Sep
'99
11:03 a.m.
tape until we started using the 8" floppies. Each
PDP 11/05 or 11/04 had
a VT52 with an internal wet paper printer.
Unless there was an upgrade option for the VT52 I don't know about, the
'VT52' w/printer is actually designated the VT55.
Megan Gentry
Former RT-11 Developer
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com |
| Unix Support Engineering Group | (home): mbg!world.std.com |
| Compaq Computer Corporation | addresses need '@' in place of '!' |
| 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ |
| Nashua, NH 03062 | "pdp-11 programmer - some assembler |
| (603) 884 1055 | required." - mbg |
+--------------------------------+-------------------------------------+
24 Sep
24 Sep
12:16 p.m.
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1:03 p.m.
New subject: VT55
Not according to my docs (and the unit I have coupled
up to my 11/45)
The VT55 is a VT52 with a 'waveform generator' card. This is an option
for plotting graphs, roughly compatible with the VT105. Basically, you
can store 2 'heights' for each vertical dot-column on the screen, and
either display a point at that height (for plotting mathematical
functions) or all points below that height (for plotting barcharts). It
gave a reasonable resolution for this, with very little memory.
The electrolytic copier (wet paper printer) was an option for either the
VT52 or the VT55 (and maybe other VT5x terminals). Most VT55s had it
fitted. Most VT52s didn't. But all combinations were possible.
-tony
Thanks Tony, that's what I remembered.
Most of the electrostatic printer units eventually either rotted out
or were allowed to dry out in favor of external Versatecs and later
laser printers.
Bill
---
bpechter@shell.monmouth.com|pechter@pechter.dyndns.org
Three things never anger: First, the one who runs your DEC,
The one who does Field Service and the one who signs your check.
25 Sep
25 Sep
5:58 a.m.
New subject: VT55
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24 Sep
24 Sep
2:24 p.m.
At 01:16 AM 9/25/99 +0100, Tony Duell wrote:
The VT55 is a VT52 with a 'waveform generator'
card. This is an option
for plotting graphs, roughly compatible with the VT105. Basically, you
can store 2 'heights' for each vertical dot-column on the screen, and
either display a point at that height (for plotting mathematical
functions) or all points below that height (for plotting barcharts). It
gave a reasonable resolution for this, with very little memory.
And thus began my entry into computer graphics, using BASIC.
It was 1979 or so, and my suburban high school had acquired an 11/03.
I tried valiantly to write subroutines on the three-person 11/03 under
what must've been MU-BASIC, to allow me to draw arbitrary VT-55 lines
and re-use dots as needed, and re-dither when more than two lines
happened in a column. I think I ran out of memory before I got
that far.
Eventually, I reworked the login system to better handle the need for
student accounts. The experience with BASIC led me to only spend
six weeks at college washing dishes and making pizzas before I landed
my first programming job, which miracle of miracles required
knowledge of MU-BASIC and other BASIC dialects.
- John
12:59 p.m.
tape until we
started using the 8" floppies. Each PDP 11/05 or 11/04 had
a VT52 with an internal wet paper printer.
Unless there was an upgrade option for the VT52 I don't know about, the
'VT52' w/printer is actually designated the VT55.
Megan Gentry
Former RT-11 Developer
4:31 p.m.
And thus began my entry into computer graphics, using
BASIC.
It was 1979 or so, and my suburban high school had acquired an 11/03.
And my first was in 1975 with a GT40... using MACRO-11 under RT-11
(V2C) and the VTLIB routines.
student accounts. The experience with BASIC led me to
only spend
six weeks at college washing dishes and making pizzas before I landed
my first programming job, which miracle of miracles required
knowledge of MU-BASIC and other BASIC dialects.
And I also got a work-study job as one of the programmer/operators
of the ME and CS department computers. I helped one grad student
with a traditional "four-bar" linkage problem, but displayed on
the screen. I also helped the ME department demonstrate closed-loop
computer control of a 25 Ton press in an "Young's Modulus" experiment.
Fun times...
Megan Gentry
Former RT-11 Developer
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com |
| Unix Support Engineering Group | (home): mbg!world.std.com |
| Compaq Computer Corporation | addresses need '@' in place of '!' |
| 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ |
| Nashua, NH 03062 | "pdp-11 programmer - some assembler |
| (603) 884 1055 | required." - mbg |
+--------------------------------+-------------------------------------+
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