RCA CDP18S711 Instruction Manual
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Appendix D - Video Games2. VIP Video Display Drawing GameThis program uses the CHIP-8 INTERPRETER at0000-01FF. A flashing spot appears in the upper leftcorner of the screen. You can move the spot by holdingkey 2, 4, 6, or 8. Press key 5 and you can draw a picturewith the spot. Press key 0 and the spot can be movedwithout drawing or used to erase a previously drawnline. 0245-024E is a list of41initial values for VO-V9. In this program, locations0300-03FF are used for the picture. After drawing apicture, you can change M(0208) from OOEO to 120A.Write locations 0000-03FF (4 pages) to tape to save yourpicture. When you load these four pages back intomemory you will see your original picture. Changing theOOEO instruction in the program to 120A prevents yourpicture from being erased when the program is started.0200 A245 I=02450202 F965 VO:V9=MI0204 A24F I=024F0206 0236 MLS@02360208 OOEO ERASE020A F915 TIME-V9020C FA07 VA=TIME020E 3AOO SKIP;VA EQ 000210 120C GO 020C0212 D121 SHOW 1MI@V1V20214 3FOO SKIP;VF EQ 000216 D121 SHOW 1MI@VIV20218 E3A1 SKIP;V3 NE KEY021A 8030 VO=V3021C E4AI SKIP;V4 NE KEYO~U 8040 VO=V40220 4000 SK1P;VO NE 000222 123C GO 023C0224 E5A1 SKIP;V5 NE KEY0226 72FF V2+FF0228 E6A1 SKIP;V6 NE KEY022A 71FF V1+FF022C E7AI S&IP;V7 NE KEY022E 7101 V1+010230 E8A1 SKJP;V8 NE KEY0232 7201 V2+010234 120A GO 020A0236 OlF80238 03BB023A E2D4023C D121 SHOW 1MI@V1V2023E 4FOO SKIP;VF NE 000240 D121 SHOW 1MI@V1V20242 1224 GO 02240244 01000246 00000248 0005024A 0204024C 0608024E 0880 |
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