512*192 mode diagram for the Pentagon

Hello Alexander! 26 Jul 00 19:20, Alexander Bondarenko -> All: [skipped] AB> Does anyone happen to have a subject lying around? AB> If there is, please throw it up... Well, you got it! Right now everyone will throw it at you :) ╒════════ Start 512PIXEL.TXT ════════╕ *************************************************************** (C) V.M.G. Kharkov, Ukraine. Additional graphics mode - 512x192 The proposed mode allows you to place 512 dots on the screen per line or 85 characters with a 6x8 matrix, which will allow placement extract significantly more information and do more convenient work with text, monochrome graphics, terminal programs. The numbering of elements in the diagram is given relative to the pentagon diagram on (by V.M.G.) and may not match your diagram. (address signals are numbered from A0 to A15). ┌──┬───┬──┐ ┌─┬───┐ C1 >──2┤A0│MUX│ │ RES >─1┤R│ T │ 2-D3 >──5┤A1│ │ │ ├─┤ ├5──┐ 8-D15 >─11┤A2│ │Y1├4─> 9-D41/D42 D1 >─2┤D│ │ │ GND >─14┤A3│ │Y2├7─> 5-D5 SEL >─3┤C│ │ │ ├──┤ │Y3├9─> C30 and 1-D7 ├─┤ ╞6─┐│ 1-D2 >──3┤B0│ │Y3├12─> 11-D17 +5V >─4┤S│D1 │ ││ C1 >──6┤B1│ │ │ └─┴───┘ ││ +5V >─10┤B2│ │ │VD1 VD2 ││ 9-D15 >─13┤B3│ │ │ D1 - 1533TM2 C29 >──┤<─╥─>├──┘│ ├──┤ │ │ D2 - 1533KP11 │ └────╥─────1┤AB│ │ │ 1K │ │ ┌─15╡OE│D2 │ │ +5V >─══──╨───> 3-D8 │ │ └──┴───┴──┘ └──┼──────────────────> 1-D40 Diodes - KD522 ┴ (output >──) send a signal from the output of the microcircuit that forms it (output <──) apply a new signal to the output, cutting off the old one Signal SEL - inverted signal from pin 9 ID7 Connection 1533ID7: signal contact us A12 1 A13 2 A14 3 A3 4 DIRQ 5 (this is the IORQ signal passed through the FDD controller) A15 6 -SEL 9 (required signal to be inverted) Also top on D38 must be soldered D38' (1533Р23) with all outputs connected nyu with D38, and connect the inputs to the corresponding outputs of D37. On The 1st pins D38 and D38' are supplied with signals C3 and 2-D3, and the 11th pins output signals C29 and C3 respectively. Also on conclusions 9,12,15,16,19 of the D40 microcircuit is necessary through 1K resistors give land. Modification is enabled by setting bit 1 of port #EFF7 and turns off by RESET or by resetting the same bit. After switching on two areas are formed in memory - #4000-#57FF - even bytes on screen, and #6000-#77FF are odd bytes on the screen. Second screenAddressed similarly (#C000-#C800 and #E000-#E800). Arrangement of bytes on the screen ┌────┬────┬────┬────┬────┬────┐ ┌────┬────┐ │4000│6000│4001│6001│4002│6002│ ... │401F│601F│ └────┴────┴────┴────┴────┴────┘ └────┴────┘ Typed and added Vic (C) V.M.G. Kharkov, Ukraine phone: 43-47-39 *************************************************************** In a nutshell, how the scheme works: When the extended display is enabled, the output shift register(s) begin to clock at double the frequency. When executing cycle (read image byte/read attribute byte) instead of the attribute byte, the image byte is read from the second half the screen from address #6000. it is read in additional register, which is linked in parallel to the main register for bytes of image data (in this diagram they are referred to as D38 and D38'). The attribute byte storage register is translated into the Z-state, and so that it does not produce RND-by colors instead sequence, its output through resistors is supported to ground and +5V. ================== ╘════════ End 512PIXEL.TXT ════════╛ Alexand