IBM RT Series Hardware Reference Manual page 245

127 C CONTINUATION TO SUCCEEDING LINES WILL NOT PRODUCE
128 C CORRECTLY.
129 C
130 C GRAPHICS INTERFACE
131 C (AH) • B SET COLOR PALETTE
132 C FOR USE IN COM PAT I Bill TY MODES
133 C (BH) • PALETTE COLOR ID BEING SET (0-127)
134 C (BL) • COLOR VALUE TO BE USED WITH THAT COLOR ID
135 C NOTE: FOR THE CURRENT COLOR CARD, THIS ENTRY POINT
136 C HAS MEANING ONLY FOR 320X200 GRAPHICS.
137 C COLOR ID • 0 SELECTS THE BACKGROUND COLOR (0-15)
138 C COLOR I D
=
1 SELECTS THE PALETTE TO BE USED:
139 C 0
=
GREEN( 1 )/RED( 2 )/BROWN( 3)
140 C 1 • CYAN( 1 )/MAGENTA( 2 )/WH I TE( 3)
141 C IN 40X25 OR 80X25 ALPHA MODES, THE VALUE SET
142 C FOR PALETTE COLOR 0 INDICATES THE
143 C BORDER COLOR TO BE USED (VALUES 0-31,
144 C WHERE 16-31 SELECT THE HIGH INTENSITY
145 C BACKGROUND SET).
146 C (AH)
=
C WRITE DOT
147 C (BH)
=
PAGE
148 C (DX)
=
ROW NUMBER
149 C (CX) = COLUMN NUMBER
150 C (AL) • COLOR VALUE
151 C IF BIT 7 Of AL = 1, THEN THE COLOR VALUE IS
152 C EXCLUSIVE ORoD WITH THE CURRENT CONTENTS OF
153 C THE DOT
154 C (AH) • D READ DOT
155 C (BH)
=
PAGE
156 C (DX)
=
ROW NUMBER
157 C (ex)
=
COLUMN NUMBER
158 C (AL) RETURNS THE DOT READ
159 C
160 C ASCII TELETYPE ROUTINE FOR OUTPUT
161 C
162 C (AH) = E WRITE TELETYPE TO ACTIVE PAGE
163 C (AL) • CHAR TO WRITE
164 C (BL) = FOREGROUND COLOR I N GRAPH I CS MODE
165 C NOTE -- SCREEN WIDTH I S CONTROLLED BY PREV I OUS MODE SET
166 C
167 C (AH)
=
F CURRENT VIDEO STATE
168 C RETURNS THE CURRENT VIDEO STATE
169 C (AL)
=
MODE CURRENTLY SET (SEE AH'O FOR EXPLANATION)
170 C (AH) • NUMBER OF CHARACTER COLUMNS ON SCREEN
171 C (BH)
=
CURRENT ACTIVE DISPLAY PAGE
172 C
173 C (AH) • 10 SET PALETTE REGISTERS
174 C
175 C (AL) • 0 SET INDIVIDUAL PALETTE REGISTER
176 C BL
=
PALETTE REG I STER TO BE SET
177 C BH
=
VALUE TO SET
178 C
179 C AL • 1 SET OVERSCAN REG I STER
180 C 8H • VALUE TO SET
181 C
182 C AL • 2 SET ALL PALETTE REG I STERS AND OVERSCAN
183 C ES:DX POINTS TO A 17 BYTE TABLE
184 C BYTES 0 - 15 ARE THE PALETTE VALUES, RESPECTIVELY
185 C BYTE 16 I S THE OVERSCAN VALUE
186 C
187 C AL· 3 TOGGLE INTENSIFY/BlIN·KING SIT
188 C BL - 0 ENABLE I NTENS I FY
189 C BL - 1 ENABLE BLINKING
190 C
191 C (AH) • 11 CHARACTER GENERATOR ROUTINE
192 C
note:
this cs II
wi
II initiate 8 mode set, completely
193 C resetting the video environment but maintaining
194 C the regen burt'e r.
195 C
196 C AL • 00 USER ALPHA LOAD
197 C ES:BP - POINTER TO USER TABLE
198 C CX - COUNT TO STORE
199 C OX - CHARACTER OFFSET I NTO TABLE
200 C BL - BLOCK TO LOAD
201 C BH - NUMBER OF BYTES PER CHARACTER
202 C AL • 01 ROM MONOCHROME SET
203 C BL - BLOCK TO LOAD
204 C AL • 02 ROM 8X8 DOUBLE DOT
205 C BL - BLOCK TO LOAD
206 C AL
=
03 SET BLOCK SPEC I F I ER
207 C BL - CHAR GEN BLOCK SPEC I F I ER
208 C 03-02 ATTR BIT 3 ONE, CHAR GEN 0-3
209 C Dl-DO ATTR BIT 3 ZERO, CHAR DEN 0-3
210 C NOTE: WHEN USING AL = 03 A FUNCTION CALL
211 C AX
=
1000H
212 C BX
=
0712H
213 C i S RECOMMENDED ,0 SET THE COLOR PLANES
214 C RESULTING IN 512 CHARACTERS AND EIGHT
215 C CONSISTENT COLORS.
216 C
217 C NOTE: THE FOLLOW·ING INTERFACE (AL.1X) IS SIMILAR IN FUNCTION
218 C TO (AL'OX) EXCEPT THAT:
219 C - PAGE ZERO MUST BE ACTIVE
220 C - POI NTS (BYTES/CHAR) WI LL BE RECALCULATED
221 C - ROWS WI LL BE CALCULATED FROM THE FOLLOW I NG:
222 C INT((200 OR 350)
I
POINTS] - 1
223 C - CRT LEN WI LL BE CALCULATED FROM:
224 C - (ROWS
+
1)
*
CRT_COLS
*
2
225 C - THE CRTC WI LL BE REPROGRAMMED AS FOLLOWS:
226 C R09H. POINTS - 1 MAX SCAN LINE
227 C R09H done on t yin mode 7
228 C ROAH • PO I NTS - 2 CURSOR START
229 C ROBH
=
0 CURSOR END
230 C R12H • VERT DISP END
231 C ((ROWS + 1)
*
POINTS] - 1
232 C R14H • POINTS UNDERLINE LOC
233 C
234 C THE ABOVE REGISTER CALCULATIONS MUST BE CLOSE TO THE
235 C ORIGINAL TABLE VALUES OR UNDETERMINED RESULTS WnL
236 C OCCUR.
237 C
238 C NOTE: THE FOLLOWING INTERFACE IS DESIGNED TO BE
239 C CALLED ONLY IMMEDIATELY AFTER A MODE SET HAS
240 C BEEN ISSUED. FAILURE TO ADHERE TO THIS PRACTICE
241 C MAY CAUSE UNDETERMINED RESULTS.
242 C
243 C AL • 10 USER ALPHA LOAD
244 C ES: BP - PO I NTER TO USER TABLE
245 C CX - COUNT TO STORE
246 C OX - CHARACTER OFFSET I NTO TABLE
247 C BL - BLOCK TO LOAD
248 C BH - NUMBER OF BYTES PER CHARACTER
249 C AL • 11 ROM MONOCHROME SET
250 C BL - BLOCK TO LOAD
251 C AL • 12 ROM 8X8 DOUBLE DOT
252 C BL - BLOCK TO LOAD
IBM Enhanced Graphics Adapter 105