Mercurial > hg > Members > kono > nitros9-code
annotate defs/vdgdefs @ 3295:6b7a7b233925 default tip
makefile: Allow PORTS with level1/2 mix
https://sourceforge.net/p/nitros9/feature-requests/10/
| author | Tormod Volden <debian.tormod@gmail.com> |
|---|---|
| date | Tue, 19 Apr 2022 18:12:17 +0200 |
| parents | e396d4f24b27 |
| children |
| rev | line source |
|---|---|
| 2024 | 1 IFNE VDGDEFS-1 |
| 1804 | 2 |
| 2024 | 3 VDGDEFS SET 1 |
| 0 | 4 |
| 1200 | 5 ******************************************************************** |
| 6 * VDGDefs - VDG Interface Definititions | |
| 7 * | |
| 8 * $Id$ | |
| 0 | 9 * |
| 1200 | 10 * Edt/Rev YYYY/MM/DD Modified by |
| 11 * Comment | |
| 12 * ------------------------------------------------------------------ | |
| 13 * 1991/05/07 Alan DeKok | |
| 1804 | 14 * Wrote original from VDGInt source. |
| 0 | 15 |
| 2024 | 16 NAM VDGDefs |
| 17 TTL VDG Interface Definitions | |
| 0 | 18 |
| 1200 | 19 * Notes: |
| 20 * | |
| 21 * All offsets from 'U' (address of device memory area) | |
| 22 * (see p. 6-9, technical reference: U=start of driver data memory | |
| 0 | 23 * NOTE: There is LOTS of stuff which is only used once, and some which |
| 24 * is not needed. Here's a list of the un-needed, and un-used (other than | |
| 25 * once) | |
| 26 * | |
| 1200 | 27 * It would probably be benificial to patch VDGint to fix these problems, |
| 0 | 28 * unless anyone else has ideas as to why VDGint is doing things this way. |
| 29 * | |
| 30 * Un-needed | |
| 31 * VD.EPlt1 - (2) set to VD.NChar, and then read only | |
| 32 * VD.EPlt2 - (2) set to same as VD.EPlt1, and then unused | |
| 33 * VD.Chr1 - (1) set to same as VD.CChar, and then unused | |
| 34 * VD.PlFlg - (1) initialized to $08, and unused | |
| 35 * | |
| 36 * Un-used | |
| 37 * | |
| 38 * $1D - (1) end of SCF memory requirements | |
| 39 * VD.Strt1 - (2) CLRed, and then read (LDD) - left as $0000 | |
| 40 * $24-$2B - (8) | |
| 41 * $33-$34 - (2) | |
| 42 * $7E-$FF - (130) | |
| 43 * | |
| 1200 | 44 * Total of 22 (150 in whole page) bytes unneeded or unused. |
| 0 | 45 |
| 2024 | 46 ORG $1E |
| 47 VD.Start RMB 1 start of VD.XXXX data: number of VDG screens in use | |
| 48 VD.Strt1 RMB 2 (2) and another start | |
| 49 VD.Caps RMB 2 caps lock info: $00=lower $FF=upper | |
| 50 VD.DFlag RMB 1 0=current screen is valid, $01-$FF = update video | |
| 0 | 51 * $24-$2B unused |
| 2024 | 52 RMB 8 |
| 53 VD.NGChr RMB 1 number of additional characters to get | |
| 54 VD.RTAdd RMB 2 (2) return address after getting characters | |
| 55 VD.EPlt1 RMB 2 (2) pointer to where to put next character | |
| 56 VD.EPlt2 RMB 2 (2) as above. | |
| 0 | 57 * $33-$34 unused |
| 2024 | 58 RMB 2 |
| 59 VD.CFlag RMB 1 true lowercase flag $10=true, $00=false | |
| 60 VD.CFlg1 RMB 1 VDG display code values | |
| 61 VD.DGBuf RMB 1 number of currently displayed buffer | |
| 62 VD.ScrnA RMB 2 (2) screen start address in system memory | |
| 63 VD.ScrnE RMB 2 (2) address of end of screen | |
| 64 VD.CrsrA RMB 1 (2) cursor address | |
| 65 VD.CrsAL RMB 1 cursor address low | |
| 66 VD.CChar RMB 1 value of character under cursor | |
| 67 VD.Mode RMB 1 mode: 0=256x192 x2, 1=128x192 x4 | |
| 68 VD.Chr1 RMB 1 same as under cursor character | |
| 69 VD.CColr RMB 1 cursor color | |
| 70 VD.Col RMB 1 number of columns for this screen | |
| 71 VD.Row RMB 1 number of rows | |
| 72 VD.TFlg1 RMB 1 see WRITE ($0E) | |
| 73 VD.Alpha RMB 1 0 when in alpha mode | |
| 74 VD.Rdy RMB 1 device ready (see SS.DStat 0=not ready) | |
| 75 VD.SBAdd RMB 2 (2) address of block screen is in | |
| 76 VD.Blk RMB 1 Block number of screen | |
| 77 VD.GBuff RMB 1 allocation for graphics buffers (block#) | |
| 78 VD.AGBuf RMB 2 (2) additional graphics buffer | |
| 79 VD.HiRes RMB 1 hi-res screen table (block value) | |
| 80 VD.NBlk RMB 1 number of blocks in this screen | |
| 81 VD.SType RMB 1 screen type 0-4 | |
| 82 VD.HR2 RMB 3 (3) for screen number 2 | |
| 83 VD.HR3 RMB 3 (3) for screen 3 (same 3 bytes as above) | |
| 84 VD.FFMem RMB 2 (2) bottom of stack for flood fill | |
| 85 VD.FFSPt RMB 2 (2) flood fill stack pointer | |
| 86 VD.FFSTp RMB 2 (2) flood fill stack top pointer | |
| 87 VD.FF6 RMB 1 flood fill flag | |
| 88 VD.MTabl RMB 2 (2) address of mask table for pixels in byte | |
| 89 VD.PixBt RMB 1 bit mask for modes (0=$07, 1=$03 )#pixels/byte | |
| 90 VD.GCrsX RMB 1 graphics cursor X value | |
| 91 VD.GCrsY RMB 1 graphics cursor Y | |
| 92 VD.Msk1 RMB 1 mask byte 1 | |
| 93 VD.Msk2 RMB 1 mask byte 2 (00,55,AA,FF) | |
| 94 VD.MCol RMB 1 color? (C003,8001) | |
| 95 VD.MCol2 RMB 1 color | |
| 96 VD.PMask RMB 1 pixel mask for colors (i.e. $55, $CC etc) | |
| 97 VD.FF1 RMB 1 data for flood fill | |
| 98 VD.FF2 RMB 1 data for flood fill | |
| 99 VD.FFMsk RMB 1 flood fill mask | |
| 100 VD.FFFlg RMB 1 flood fill flag | |
| 101 VD.Palet RMB 16 (16) current palette values | |
| 102 VD.PlFlg RMB 1 initialized to $08 by L00DB, and then unused! | |
| 103 VD.NChar RMB 1 character to process | |
| 104 VD.NChr2 RMB 1 and the next one | |
| 0 | 105 |
| 106 * and RMB until we get 256 bytes reserved | |
|
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c07686556109
Added ifeq statements at top to allow for multiple use's of same def
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| 2024 | 108 ENDC |
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c07686556109
Added ifeq statements at top to allow for multiple use's of same def
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