Tandy 1000 Programmer's Reference Guide

Chapter 6 I BIOS Services
Set Cursor Type
Set the cursor type and attribute.
Entry Conditions:
AH = 1
CH = bit values:
bits
5-6:
bits 4-0 = start line for cursor within character cell
bits 4-0 = end line for cursor within character cell
CL = bit values:
Set Cursor Position
Write (set) cursor position.
Entry Conditions:
AH = 2
BH = page number (must be 0 for graphics modes)
DH = row (0 = top row)
.DL = column (0 = leftmost column)
Get Cursor Position
Read (get) cursor position.
Entry Conditions:
AH = 3
BH = page number (must
Exit Conditions:
0 for gral;
ics modes)
DH = row of current cursor position (0 = top row)
DL = column of current cursor position (0 = leftmost column)
CH = cursor type currently set [l]:
bits 5-6:
Setting bits 5 and 6 to 00, produces a visible, blinking cur-
sor. Any other values result in an invisible cursor.
bits
4-0 = start line for cursor within character cell
CL = bit values:
bits 4-0 = end line for cursor within character cell
See Set Cursor Type (AH = 1) above.
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Tandy 1000 Specifications

General

Processor	Intel 8088
Processor Speed	4.77 MHz
RAM	128 KB (expandable to 640 KB)
Operating System	MS-DOS 2.11
Manufacturer	Tandy Corporation
Release Year	1984
Storage	Single or double 5.25" floppy disk drive (360 KB), optional hard drive
Sound	Tandy 3-voice sound
Ports	Parallel, Serial
Graphics	CGA (Color Graphics Adapter)
Graphics Modes	320x200, 640x200