github.com/simh.simh
1
0
Fork 0
mirror of https://github.com/simh/simh.git synced 2026-02-02 06:42:18 +00:00
Code Releases Activity

TT2500: Turtle Terminal 2500, from General Turtle Inc.

Browse Source 
Custom TTL design by Marvin Minsky.  There are two displays: one
raster scan for bitmapped characters, and another random scan for
vector graphics.  There is also a keyboard, and a UART for talking
to a host computer.

The computer is normally booted off a ROM which reads and starts a
secondary loader from the UART.  The loader is responsible for reading
the payload, which comes in checksummed blocks.  The LOAD command
accepts files in same format.
This commit is contained in:
Lars Brinkhoff
2020-12-02 08:17:47 +01:00
parent a6e6968cfd
commit 44cc9f3f6d
19 changed files with 3324 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
display/display.c
View File

@@ -259,7 +259,15 @@ static struct display displays[] = {
* P31 phosphor according to "Heads-Up Display for Flight
* Simulator for Advanced Aircraft"
*/
{ DIS_IMLAC, "Imlac Display", &color_p31, NULL, 1024, 1024 }
{ DIS_IMLAC, "Imlac Display", &color_p31, NULL, 1024, 1024 },
/*
* TT2500 display
* 512x512 addressable points.
* P31 phosphor according to "Heads-Up Display for Flight
* Simulator for Advanced Aircraft"
*/
{ DIS_TT2500, "TT2500 Display", &color_p31, NULL, 512, 512 }
};
/*

1
display/display.h
View File

@@ -51,6 +51,7 @@ enum display_type {
DIS_III = 111,
DIS_TYPE340 = 340,
DIS_NG = 999,
DIS_TT2500 = 2500,
};
/*

115
display/tt2500.c Normal file
View File

@@ -0,0 +1,115 @@
/* tt2500.c: TT2500 display interface.
Copyright (c) 2020, Lars Brinkhoff
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
LARS BRINKHOFF BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Except as contained in this notice, the name of Lars Brinkhoff shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from Lars Brinkhoff
*/
#include "display.h"
#include "tt2500.h"
#if defined(__cplusplus)
extern "C" {
#endif
int tt2500_init(void *dev, int debug)
{
return display_init (DIS_TT2500, 1, dev);
}
static void tt2500_point (int x, int y, int i)
{
if (i < 7)
display_point (x, y, DISPLAY_INT_MAX*(7-i)/7, 0);
}
int tt2500_cycle(int us, int slowdown)
{
return display_age (us, slowdown);
}
#define ABS(_X) ((_X) >= 0 ? (_X) : -(_X))
#define SIGN(_X) ((_X) >= 0 ? 1 : -1)
static void
xline (int x, int y, int x2, int dx, int dy, int i)
{
int ix = SIGN(dx);
int iy = SIGN(dy);
int ay;
dx = ABS(dx);
dy = ABS(dy);
ay = dy/2;
for (;;) {
tt2500_point (x, y, i);
if (x == x2)
break;
if (ay > 0) {
y += iy;
ay -= dx;
}
ay += dy;
x += ix;
}
}
static void
yline (int x, int y, int y2, int dx, int dy, int i)
{
int ix = SIGN(dx);
int iy = SIGN(dy);
int ax;
dx = ABS(dx);
dy = ABS(dy);
ax = dx/2;
for (;;) {
tt2500_point (x, y, i);
if (y == y2)
break;
if (ax > 0) {
x += ix;
ax -= dy;
}
ax += dx;
y += iy;
}
}
void
tt2500_line (int x1, int y1, int x2, int y2, int i)
{
int dx = x2 - x1;
int dy = y2 - y1;
if (ABS (dx) > ABS(dy))
xline (x1, y1, x2, dx, dy, i);
else
yline (x1, y1, y2, dx, dy, i);
}
#if defined(__cplusplus)
}
#endif

37
display/tt2500.h Normal file
View File

@@ -0,0 +1,37 @@
/* tt2500.h: TT2500 display interface.
Copyright (c) 2020, Lars Brinkhoff.
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
LARS BRINKHOFF BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
Except as contained in this notice, the name of Lars Brinkhoff shall not be
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from Lars Brinkhoff
*/
#if defined(__cplusplus)
extern "C" {
#endif
extern int tt2500_init(void *, int);
extern int tt2500_cycle(int, int);
extern void tt2500_line(int x1, int y1, int x2, int y2, int i);
#if defined(__cplusplus)
}
#endif