Apple-2-SW/apple2_hgr_font_tutorial
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Table 1 spacer, Table 2 last column alignment

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michaelangel007 2016-01-12 07:17:34 -08:00
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@ -145,72 +145,72 @@ With all the decimal cruft removed:
Table 1: HGR Y Address for every scanline Table 1: HGR Y Address for every scanline
| Y |Address| Y |Address| Y |Address| Screen Hole | | Y |Address| | Y |Address| | Y |Address| | Screen Hole |
|----:|:-----:|----:|-------|----:|:-----:|:------------:| |----:|:-----:|---|----:|-------|---|----:|:-----:|---|:------------:|
| 0 | $2000 | 64 | $2028 | 128 | $2050 | $2078..$207F | | 0 | $2000 | | 64 | $2028 | | 128 | $2050 | | $2078..$207F |
| 1 | $2400 | 65 | $2428 | 129 | $2450 | $2478..$247F | | 1 | $2400 | | 65 | $2428 | | 129 | $2450 | | $2478..$247F |
| 2 | $2800 | 66 | $2828 | 130 | $2850 | $2878..$287F | | 2 | $2800 | | 66 | $2828 | | 130 | $2850 | | $2878..$287F |
| 3 | $2C00 | 67 | $2C28 | 131 | $2C50 | $2C78..$2C7F | | 3 | $2C00 | | 67 | $2C28 | | 131 | $2C50 | | $2C78..$2C7F |
| 4 | $3000 | 68 | $3028 | 132 | $3050 | $3078..$307F | | 4 | $3000 | | 68 | $3028 | | 132 | $3050 | | $3078..$307F |
| 5 | $3400 | 69 | $3428 | 133 | $3450 | $3478..$347F | | 5 | $3400 | | 69 | $3428 | | 133 | $3450 | | $3478..$347F |
| 6 | $3800 | 70 | $3828 | 134 | $3850 | $3878..$387F | | 6 | $3800 | | 70 | $3828 | | 134 | $3850 | | $3878..$387F |
| 7 | $3C00 | 71 | $3C28 | 135 | $3C50 | $3C78..$3C7F | | 7 | $3C00 | | 71 | $3C28 | | 135 | $3C50 | | $3C78..$3C7F |
| 8 | $2080 | 72 | $20A8 | 136 | $20D0 | $20F8..$20FF | | 8 | $2080 | | 72 | $20A8 | | 136 | $20D0 | | $20F8..$20FF |
| 9 | $2480 | 73 | $24A8 | 137 | $24D0 | $24F8..$24FF | | 9 | $2480 | | 73 | $24A8 | | 137 | $24D0 | | $24F8..$24FF |
| 10 | $2880 | 74 | $28A8 | 138 | $28D0 | $28F8..$28FF | | 10 | $2880 | | 74 | $28A8 | | 138 | $28D0 | | $28F8..$28FF |
| 11 | $2C80 | 75 | $2CA8 | 139 | $2CD0 | $2CF8..$2CFF | | 11 | $2C80 | | 75 | $2CA8 | | 139 | $2CD0 | | $2CF8..$2CFF |
| 12 | $3080 | 76 | $30A8 | 140 | $30D0 | $30F8..$30FF | | 12 | $3080 | | 76 | $30A8 | | 140 | $30D0 | | $30F8..$30FF |
| 13 | $3480 | 77 | $34A8 | 141 | $34D0 | $34F8..$34FF | | 13 | $3480 | | 77 | $34A8 | | 141 | $34D0 | | $34F8..$34FF |
| 14 | $3880 | 78 | $38A8 | 142 | $38D0 | $38F8..$38FF | | 14 | $3880 | | 78 | $38A8 | | 142 | $38D0 | | $38F8..$38FF |
| 15 | $3C80 | 79 | $3CA8 | 143 | $3CD0 | $3CF8..$3CFF | | 15 | $3C80 | | 79 | $3CA8 | | 143 | $3CD0 | | $3CF8..$3CFF |
| 16 | $2100 | 80 | $2128 | 144 | $2150 | $2178..$217F | | 16 | $2100 | | 80 | $2128 | | 144 | $2150 | | $2178..$217F |
| 17 | $2500 | 81 | $2528 | 145 | $2550 | $2578..$257F | | 17 | $2500 | | 81 | $2528 | | 145 | $2550 | | $2578..$257F |
| 18 | $2900 | 82 | $2928 | 146 | $2950 | $2978..$297F | | 18 | $2900 | | 82 | $2928 | | 146 | $2950 | | $2978..$297F |
| 19 | $2D00 | 83 | $2D28 | 147 | $2D50 | $2D78..$2D7F | | 19 | $2D00 | | 83 | $2D28 | | 147 | $2D50 | | $2D78..$2D7F |
| 20 | $3100 | 84 | $3128 | 148 | $3150 | $3178..$317F | | 20 | $3100 | | 84 | $3128 | | 148 | $3150 | | $3178..$317F |
| 21 | $3500 | 85 | $3528 | 149 | $3550 | $3578..$357F | | 21 | $3500 | | 85 | $3528 | | 149 | $3550 | | $3578..$357F |
| 22 | $3900 | 86 | $3928 | 150 | $3950 | $3978..$397F | | 22 | $3900 | | 86 | $3928 | | 150 | $3950 | | $3978..$397F |
| 23 | $3D00 | 87 | $3D28 | 151 | $3D50 | $3D78..$3D7F | | 23 | $3D00 | | 87 | $3D28 | | 151 | $3D50 | | $3D78..$3D7F |
| 24 | $2180 | 88 | $21A8 | 152 | $21D0 | $21F8..$21FF | | 24 | $2180 | | 88 | $21A8 | | 152 | $21D0 | | $21F8..$21FF |
| 25 | $2580 | 89 | $25A8 | 153 | $25D0 | $25F8..$25FF | | 25 | $2580 | | 89 | $25A8 | | 153 | $25D0 | | $25F8..$25FF |
| 26 | $2980 | 90 | $29A8 | 154 | $29D0 | $29F8..$29FF | | 26 | $2980 | | 90 | $29A8 | | 154 | $29D0 | | $29F8..$29FF |
| 27 | $2D80 | 91 | $2DA8 | 155 | $2DD0 | $2DF8..$2DFF | | 27 | $2D80 | | 91 | $2DA8 | | 155 | $2DD0 | | $2DF8..$2DFF |
| 28 | $3180 | 92 | $31A8 | 156 | $31D0 | $31F8..$31FF | | 28 | $3180 | | 92 | $31A8 | | 156 | $31D0 | | $31F8..$31FF |
| 29 | $3580 | 93 | $35A8 | 157 | $35D0 | $35F8..$35FF | | 29 | $3580 | | 93 | $35A8 | | 157 | $35D0 | | $35F8..$35FF |
| 30 | $3980 | 94 | $39A8 | 158 | $39D0 | $39F8..$39FF | | 30 | $3980 | | 94 | $39A8 | | 158 | $39D0 | | $39F8..$39FF |
| 31 | $3D80 | 95 | $3DA8 | 159 | $3DD0 | $3DF8..$3DFF | | 31 | $3D80 | | 95 | $3DA8 | | 159 | $3DD0 | | $3DF8..$3DFF |
| 32 | $2200 | 96 | $2228 | 160 | $2250 | $2278..$227F | | 32 | $2200 | | 96 | $2228 | | 160 | $2250 | | $2278..$227F |
| 33 | $2600 | 97 | $2628 | 161 | $2650 | $2678..$267F | | 33 | $2600 | | 97 | $2628 | | 161 | $2650 | | $2678..$267F |
| 34 | $2A00 | 98 | $2A28 | 162 | $2A50 | $2A78..$2A7F | | 34 | $2A00 | | 98 | $2A28 | | 162 | $2A50 | | $2A78..$2A7F |
| 35 | $2E00 | 99 | $2E28 | 163 | $2E50 | $2E78..$2E7F | | 35 | $2E00 | | 99 | $2E28 | | 163 | $2E50 | | $2E78..$2E7F |
| 36 | $3200 | 100 | $3228 | 164 | $3250 | $3278..$327F | | 36 | $3200 | | 100 | $3228 | | 164 | $3250 | | $3278..$327F |
| 37 | $3600 | 101 | $3628 | 165 | $3650 | $3678..$367F | | 37 | $3600 | | 101 | $3628 | | 165 | $3650 | | $3678..$367F |
| 38 | $3A00 | 102 | $3A28 | 166 | $3A50 | $3A78..$3A7F | | 38 | $3A00 | | 102 | $3A28 | | 166 | $3A50 | | $3A78..$3A7F |
| 39 | $3E00 | 103 | $3E28 | 167 | $3E50 | $3E78..$3E7F | | 39 | $3E00 | | 103 | $3E28 | | 167 | $3E50 | | $3E78..$3E7F |
| 40 | $2280 | 104 | $22A8 | 168 | $22D0 | $22F8..$22FF | | 40 | $2280 | | 104 | $22A8 | | 168 | $22D0 | | $22F8..$22FF |
| 41 | $2680 | 105 | $26A8 | 169 | $26D0 | $26F8..$26FF | | 41 | $2680 | | 105 | $26A8 | | 169 | $26D0 | | $26F8..$26FF |
| 42 | $2A80 | 106 | $2AA8 | 170 | $2AD0 | $2AF8..$2AFF | | 42 | $2A80 | | 106 | $2AA8 | | 170 | $2AD0 | | $2AF8..$2AFF |
| 43 | $2E80 | 107 | $2EA8 | 171 | $2ED0 | $2EF8..$2EFF | | 43 | $2E80 | | 107 | $2EA8 | | 171 | $2ED0 | | $2EF8..$2EFF |
| 44 | $3280 | 108 | $32A8 | 172 | $32D0 | $32F8..$32FF | | 44 | $3280 | | 108 | $32A8 | | 172 | $32D0 | | $32F8..$32FF |
| 45 | $3680 | 109 | $36A8 | 173 | $36D0 | $36F8..$36FF | | 45 | $3680 | | 109 | $36A8 | | 173 | $36D0 | | $36F8..$36FF |
| 46 | $3A80 | 110 | $3AA8 | 174 | $3AD0 | $3AF8..$3AFF | | 46 | $3A80 | | 110 | $3AA8 | | 174 | $3AD0 | | $3AF8..$3AFF |
| 47 | $3E80 | 111 | $3EA8 | 175 | $3ED0 | $3EF8..$3EFF | | 47 | $3E80 | | 111 | $3EA8 | | 175 | $3ED0 | | $3EF8..$3EFF |
| 48 | $2300 | 112 | $2328 | 176 | $2350 | $2378..$237F | | 48 | $2300 | | 112 | $2328 | | 176 | $2350 | | $2378..$237F |
| 49 | $2700 | 113 | $2728 | 177 | $2750 | $2778..$277F | | 49 | $2700 | | 113 | $2728 | | 177 | $2750 | | $2778..$277F |
| 50 | $2B00 | 114 | $2B28 | 178 | $2B50 | $2B78..$2B7F | | 50 | $2B00 | | 114 | $2B28 | | 178 | $2B50 | | $2B78..$2B7F |
| 51 | $2F00 | 115 | $2F28 | 179 | $2F50 | $2F78..$2F7F | | 51 | $2F00 | | 115 | $2F28 | | 179 | $2F50 | | $2F78..$2F7F |
| 52 | $3300 | 116 | $3328 | 180 | $3350 | $3378..$337F | | 52 | $3300 | | 116 | $3328 | | 180 | $3350 | | $3378..$337F |
| 53 | $3700 | 117 | $3728 | 181 | $3750 | $3778..$377F | | 53 | $3700 | | 117 | $3728 | | 181 | $3750 | | $3778..$377F |
| 54 | $3B00 | 118 | $3B28 | 182 | $3B50 | $3B78..$3B7F | | 54 | $3B00 | | 118 | $3B28 | | 182 | $3B50 | | $3B78..$3B7F |
| 55 | $3F00 | 119 | $3F28 | 183 | $3F50 | $3F78..$3F7F | | 55 | $3F00 | | 119 | $3F28 | | 183 | $3F50 | | $3F78..$3F7F |
| 56 | $2380 | 120 | $23A8 | 184 | $23D0 | $23F8..$23FF | | 56 | $2380 | | 120 | $23A8 | | 184 | $23D0 | | $23F8..$23FF |
| 57 | $2780 | 121 | $27A8 | 185 | $27D0 | $27F8..$27FF | | 57 | $2780 | | 121 | $27A8 | | 185 | $27D0 | | $27F8..$27FF |
| 58 | $2B80 | 122 | $2BA8 | 186 | $2BD0 | $2BF8..$2BFF | | 58 | $2B80 | | 122 | $2BA8 | | 186 | $2BD0 | | $2BF8..$2BFF |
| 59 | $2F80 | 123 | $2FA8 | 187 | $2FD0 | $2FF8..$2FFF | | 59 | $2F80 | | 123 | $2FA8 | | 187 | $2FD0 | | $2FF8..$2FFF |
| 60 | $3380 | 124 | $33A8 | 188 | $33D0 | $33F8..$33FF | | 60 | $3380 | | 124 | $33A8 | | 188 | $33D0 | | $33F8..$33FF |
| 61 | $3780 | 125 | $37A8 | 189 | $37D0 | $37F8..$37FF | | 61 | $3780 | | 125 | $37A8 | | 189 | $37D0 | | $37F8..$37FF |
| 62 | $3B80 | 126 | $3BA8 | 190 | $3BD0 | $3BF8..$3BFF | | 62 | $3B80 | | 126 | $3BA8 | | 190 | $3BD0 | | $3BF8..$3BFF |
| 63 | $3F80 | 127 | $3FA8 | 191 | $3FD0 | $3FF8..$3FFF | | 63 | $3F80 | | 127 | $3FA8 | | 191 | $3FD0 | | $3FF8..$3FFF |
<hr> <hr>
@ -1599,33 +1599,33 @@ For our final trick we are going to copy the characters off the text screen onto
The text screen, like the HGR screen, is also non-linear, and also broken up into a triad: The text screen, like the HGR screen, is also non-linear, and also broken up into a triad:
|Row|Text Addrress|HGR Address| |Row|Text Addrress|HGR Address|
|--:|:----:|:----:| |--:|:----:|:-----:|
| 0 | $400 |$2000| | 0 | $400 | $2000 |
| 1 | $480 |$2080| | 1 | $480 | $2080 |
| 2 | $500 |$2100| | 2 | $500 | $2100 |
| 3 | $580 |$2180| | 3 | $580 | $2180 |
| 4 | $600 |$2200| | 4 | $600 | $2200 |
| 5 | $600 |$2280| | 5 | $600 | $2280 |
| 6 | $700 |$2300| | 6 | $700 | $2300 |
| 7 | $780 |$2380| | 7 | $780 | $2380 |
| - | ---- |-----| | - | ---- | ----- |
| 8 | $428 |$2028| | 8 | $428 | $2028 |
| 9 | $4A8 |$20A8| | 9 | $4A8 | $20A8 |
|10 | $528 |$2128| |10 | $528 | $2128 |
|11 | $5A8 |$21A8| |11 | $5A8 | $21A8 |
|12 | $628 |$2228| |12 | $628 | $2228 |
|13 | $6A8 |$22A8| |13 | $6A8 | $22A8 |
|14 | $728 |$2328| |14 | $728 | $2328 |
|15 | $7A8 |$23A8| |15 | $7A8 | $23A8 |
| - | ---- |-----| | - | ---- | ----- |
|16 | $450 |$2050| |16 | $450 | $2050 |
|17 | $4D0 |$20D0| |17 | $4D0 | $20D0 |
|18 | $550 |$2150| |18 | $550 | $2150 |
|19 | $5D0 |$21D0| |19 | $5D0 | $21D0 |
|20 | $650 |$2250| |20 | $650 | $2250 |
|21 | $6D0 |$22D0| |21 | $6D0 | $22D0 |
|22 | $750 |$2350| |22 | $750 | $2350 |
|23 | $7D0 |$23D0| |23 | $7D0 | $23D0 |
While the Apple's memory layout seems esoteric it has beautiful symmetry. For any given text row notice that: While the Apple's memory layout seems esoteric it has beautiful symmetry. For any given text row notice that: