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S-MOS Systems, Inc. 2460 North First Street San Jose, CA 95131 Tel: (408) 922-0200 Fax: (408) 922-0238
6
268-0.4
6.0 Character Generator
........................................................................................
95
6.1 CG Characteristics ......................................................................................................................97
6.1.1 Internal Character Generator.................................................................................. 97
6.1.2 External Character Generator ROM ....................................................................... 97
6.1.3 Character Generator RAM...................................................................................... 97
6.2 CG Memory Allocation................................................................................................................. 98
6.3 Setting the Character Generator Address ................................................................................... 99
6.3.1 M1 = 1...................................................................................................................100
6.3.2 CG RAM Addressing Example..............................................................................100
6.4 Character Codes .......................................................................................................................101
7.0 TV Mode (SED1336F only)
.............................................................................
103
7.1 Sync Generator Circuit Timing ..................................................................................................105
8.0 Description of Circuit Blocks
........................................................................
109
8.1 Microprocessor Interface........................................................................................................... 111
8.1.1 System Bus Interface............................................................................................ 111
8.1.1.1 8080 series ...................................................................................... 111
8.1.1.2 6800 series ...................................................................................... 111
8.1.2 Microprocessor Synchronization........................................................................... 111
8.1.2.1 Display Status Indication Output For SED1336F only...................... 111
8.1.2.2 Internal Register Access .................................................................. 111
8.1.2.3 Display Memory Access................................................................... 111
8.1.3 Interface Examples ............................................................................................... 113
8.1.3.1 Z80 to SED1330F/1335F/1336F Interface .................................... 113
8.1.3.2 6802 to SED1330F/1335F/1336F Interface ..................................... 114
8.2 Display Memory Interface.......................................................................................................... 115
8.2.1 Static RAM............................................................................................................ 115
8.2.2 Supply Current during Display Memory Access.................................................... 115
8.3 Oscillator Circuit ........................................................................................................................ 116
8.4 Status Flag ................................................................................................................................ 116
8.5 Reset ......................................................................................................................................... 117
9.0 Application Notes
...........................................................................................
119
9.1 Initialization Parameters ............................................................................................................ 121
9.1.1 SYSTEM SET Instruction and Parameters...........................................................121
9.1.2 Initialization Example............................................................................................122
9.1.3 Display Mode Setting Example 1: Combining Text and Graphics.........................128
9.1.4 Display Mode Setting Example 2: Combining Graphics and Graphics.................129
9.1.5 Display Mode Setting Example 3: Combining Three Graphics Layers .................130
9.2 System Overview ......................................................................................................................132
SED1330F/1335F/1336F
Table of Contents