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vlad, я спрашивал как ты представляешь DMA
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1) Yes. Rewrite ports in DIVIDE systems enable full compatibility with old russian devices. But all new software must be rewrited for this ports :( 2) Or implement only DIVIDE memory with NEMO IDE ports (need modification of DIVIDE software, but can be used on other russian ZX clones for software with NEMO IDE drivers. 3) Add software/hardware switch for enable/disable DIVIDE ide ports. |
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I change adress of ide ports in DEMFIR 0.5b. In equations of A_GAL chip must be change this two lines:
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ideio0 = A0*A1*/A2*/A3*/A4*/A5*A7And adress of DivIDE control register is 11000011 (dec 195) This ports is compatible with GENERAL SOUND :) but incompatible with some Kempston mouse versions :( In attachment is BIN file for DIVIDE rom 8kB. next info about DEMFIR: - use 128kB memory paging via LD A,64+16+page : OUT (253),A then used ZX clone must on adressation of port #7FFD detect A15-A14 and A13-A8 must be ignored !!! - use software detection of 128kB memory page then run correct only on 128kB models or if 128kB mode is set (on Pentagon computers must be memory set to 128kB mode (set lock D2 on port #EFF7). |
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D4 is a TURBO |
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zst, изменения в схеме: вместо HCT245_1 будет HCT373, при этом на ПЛИС надо завести с неё оба сигнала управления! Т.е. ещё минус 1 нога. И вместо АП5 будут две 555КП11
AY_CLK - выбрасывай, на каждой рассыпушной плате он есть Итого 8-1+1=8 ног в запасе. |
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