Т TTXPROM #Т Make TTXT address lookup PROM 7Т DEN, HS, VS, RES not needed if SAA5020 timer used (: 2Т Horizontal signals <8Т cell/8 -> 0011223344556677 01234567 F)Т cell/4 -> 0123456789ABCDEF P8Т 0-39 display XXXXXXXXXX------ DEN ~~~~~___ Z)Т 40-47 front porch ----------XX---- d8Т 48-51 sync ------------X--- HS ~~~~~~_~ n)Т 52-63 back porch -------------XXX x: ┌<Т 222222233 222222233 ▄<Т Vertical signals 012..12345678901 0..345678901 √<Т 0-24 display XXXXXXXXX------- DEN ~~~~~_______ ═)Т 25-26 ---------------- ╙<Т 27 sync ------------X--- VS ~~~~~~~~_~~~ Є)Т 28-29 ---------------- Ў<Т 30 reset --------------X- RES ~~~~~~~~~~_~ х)Т 31 ---------------- р: эout%=ў("6440.bin") ФЦ addr%=0 ╦ 255 Пcol%=addr% ─ (64/8)-1 Зrow%=addr% │ (64/8) cell%=row%*(40/8)+col% )Т b7=0 - not-DEN outside display area 0Т b6=HS pulse - OR'd with external A2 "Т b5=VS pulse ,Т b4=frame reset 6!Т b7=1 - DEN display area @Т b0-b6 = address J: T byte%=&7F ^-Г col%=6:byte%=byte% ─ ╛ &40 :Т HS h-Г row%=27:byte%=byte% ─ ╛ &20 :Т VS r.Г row%=30:byte%=byte% ─ ╛ &10 :Т RES |4Г col%<5 ─ row%<25:byte%=cell% └ &80 :Т DEN+cell ├8Г col%=0:Я "row:";єd0(row%,2);" ";єh0(addr%,2);": "; ░Я єh0(byte%,2);" "; Г col%=(64/8)-1:Я єу#out%,byte% ўМ ╦ ы#out% бЮ л: ж#щєh0(A%,N%)=б"0000000"+ц~A%,N%) Ю"щєd0(A%,N%)=б"0000000"+цA%,N%) Ъ