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www.riscos.com Technical Support: |
The groups of PLOT codes are as follows:
| 0 - 7 | (&00 - &07) | Solid line including both end points |
| 8 - 15 | (&08 - &0F) | Solid line excluding final points |
| 16 - 23 | (&10 - &17) | Dotted line including both end points |
| 24 - 31 | (&18 - &1F) | Dotted line excluding final points |
| 32 - 39 | (&20 - &27) | Solid line excluding initial point |
| 40 - 47 | (&28 - &2F) | Solid line excluding both end points |
| 48 - 55 | (&30 - &37) | Dotted line excluding initial point |
| 56 - 63 | (&38 - &3F) | Dotted line excluding both end points |
| 64 - 71 | (&40 - &47) | Point plot |
| 72 - 79 | (&48 - &4F) | Horizontal line fill (left & right) to non-background |
| 80 - 87 | (&50 - &57) | Triangle fill |
| 88 - 95 | (&58 - &5F) | Horizontal line fill (right only) to background |
| 96 - 103 | (&60 - &67) | Rectangle fill |
| 104 - 111 | (&68 - &6F) | Horizontal line fill (left & right) to foreground |
| 112 - 119 | (&70 - &77) | Parallelogram fill |
| 120 - 127 | (&78 - &7F) | Horizontal line fill (right only) to non-foreground |
| 128 - 135 | (&80 - &87) | Flood to background |
| 136 - 143 | (&88 - &8F) | Flood to foreground |
| 144 - 151 | (&90 - &97) | Circle outline |
| 152 - 159 | (&98 - &9F) | Circle fill |
| 160 - 167 | (&A0 - &A7) | Circular arc |
| 168 - 175 | (&A8 - &AF) | Segment |
| 176 - 183 | (&B0 - &B7) | Sector |
| 184 - 191 | (&B8 - &BF) | Block copy/move |
| 192 - 199 | (&C0 - &C7) | Ellipse outline |
| 200 - 207 | (&C8 - &CF) | Ellipse fill |
| 208 - 215 | (&D0 - &D7) | Graphics characters |
| 216 - 223 | (&D8 - &DF) | Reserved for Acorn expansion |
| 224 - 231 | (&E0 - &E7) | Reserved for Acorn expansion |
| 232 - 239 | (&E8 - &EF) | Sprite plot |
| 240 - 247 | (&F0 - &F7) | Reserved for user programs |
| 248 - 255 | (&F8 - &FF) | Reserved for user programs |
| Within each block of eight the offset from the base number has the following meaning: | ||
| 0 | Move cursor relative (to last graphics point visited) | |
| 1 | Draw relative using current foreground colour | |
| 2 | Draw relative using logical inverse colour | |
| 3 | Draw relative using current background colour | |
| 4 | Move cursor absolute (ie move to actual co-ordinate given) | |
| 5 | Draw absolute using current foreground colour | |
| 6 | Draw absolute using logical inverse colour | |
| 7 | Draw absolute using current background colour | |
| The above applies except for COPY and MOVE where the codes are as follows: | ||
| 184 | (&B8) | Move only, relative |
| 185 | (&B9) | Move rectangle relative |
| 186 | (&BA) | Copy rectangle relative |
| 187 | (&BB) | Copy rectangle relative |
| 188 | (&BC) | Move only, absolute |
| 189 | (&BD) | Move rectangle absolute |
| 190 | (&BE) | Copy rectangle absolute |
| 191 | (&BF) | Copy rectangle absolute |