What is a Universal Interface Card? This card is a circuit board that is available for B bits parallel interface. The card is inserted into any connector of Sharp Interface Unit MZ-BOIO, and is used for interface between central processor MZ-BOK and your peripheral device. Port address can be set up by a port address selector on the board. However this card needs some modification -_ wiring, soldering, etc. - - to match use. How to use (1) On the standard board, there are ICs 7404N that are mounted in the IC sockets at the output stage of output port. However, ·llthese ICs should be changed with the following ICs in response to the load condition. 7405N, 7406N, 7407N, 7414N, 7416N, 7417N, etc. (2) Resistors at input/output stage At the input/output stage, pull-up, pull-down or terminal resistors can be mounted on the board. ·2lYou should mount suitable resistors in response to load conditions. (3) To mount input/output connector There lire many holes with dimensions shown below in the card for connecting an input/output cable_ Use a suitableconnector. ~----------~~~ 0.1 inch Tfr~~~~. --- --- -- -o-o~ t"- 0.1 inch 50 holes a line (4) Port address setting Port address settirig depends on a port address selector (PS) that consists of multiple switches. The numbers described on the selector a correspond to the following address bus respectively. Switch No. 7 6 5 4 3 Address bus AB7 AB6 ABs AB4 AB3 2 AB2 1 ABI OFF condition of a switch corresponds to logic "1 ", and ON condition to logic "0". For example, when setting up a port address to decimal value (100ho, the condition of each switch will be as follows. Switch No. 7 Condition ON 6 OFF 5 4 3 2 1 OFF ON ON OFF ON Because the decimal value (100lto is a binary value (01100100h. (100)10 1 Oh Ss LABo i Therefore, the condition of the selector should be as illustrated beloW. s s s s s s s Port address range is 0 to 255 (OOH to FFH). '4)However, you should specify a port address in the range 0 to 239 (OOH to EFH). (5) Port address 110 to 117 (Input port) 120 to 127 (Input port) 010 to 0 17 (Output port) 0 10 to 027 (Output port) even address odd address even address odd address (6) Control Basic SP-5025 or Disk Basic SP-6015 has the following input/output commands. INP #PORT, X . . . . . . . . . . . . . . . . SP-5025 INP @PORT, X . . . . . . . . . . . . . . . . SP-6015 These mean that 8 bits data is input from the specified port address "PORT" and then is set to variable X as decimal value (0 to 255). OUT #PORT, X . . . . . . . . . . . . . . . SP-5025 OUT @PORT, X . . . . . . . . . . . . . . . SP-6015 These mean that value X (0 to 255) is output to the specified port address "PORT" as 8 bits binary value. With executing the above commands, the port address code is changed to a binary code, which is output to address bus Ao toA 7 • I/O control can be also available with Z80 machine language such as "Machine Language", "Systems Program", etc .. *** Note *** Incorrect operation may damage the card. Pay special attention to the modifications and handling. * 1) Never mistake the ICs inserting direction when changing other ICs. Reverse insertion damages them. *2) 00 not use unsuitable pull-up, pull-down or terminal resistors. *3) 00 not use two or more interface cards with same port address at a time. correspondence of port address. ICs' may be broken because of the *4) Port addresses FOH to FFH are occupied with Sharp optional peripherals. *5) We assume no responsibility for any trouble which is caused by universal interface cards altered by the user. Specifications (1) Number of ports Input : 2 ports Output : 2 ports (2) Port address setting Whole address setting possible (3) Connection with bus line Bus Symbols Employed IC Data bus oBo to oB 7 74LS04N,74LS125N Address bus ABo to AB7 74 LS266N Control bus IORGB ROB WRB RESET 74 LS266N 74LS42N 74LS42N 74 LS04N Each signal is as per TTL level. The electronical specification is in accordance with one of ICs' employed. (4) Port input TTL level, non latch system Signals are input to the data bus via IC 74LS125 with the same logic. The electronic specification is in accordance with one of IC 74 LS 125. (5) Port output TTL level, latch system Signals are output via IC 7404 with the same logic. The electronic specification is in accordance with one of IC 7404. (6) Bus line terminals and employed ICs Refer to the circuit diagram (see page 4). (7) Operating temperature o to 35°C (8) Storage temperature -15 to 60°C (9) Power source o.C. +5V (supplied from Interface Unit MZ-8010) 2 Parts arrangement pattern ,... ...... N ......~ --"y"or-~~..,..- _.J\./'.,. _ O~~ --"v v-I~~ --"v'\r- --"v'''.,.- --"v v- _Jo v ..,..- --"v"v- _...I'./'v-- 8£jJv-- -~~}lv-- -...1''1 v-t;.~ _Joy \1- _ _...I'v v-- _J~~v-- .. --"v'. ..,..- -~¥£t;.~ _,J\" ~ _-"9 f\.,._ -~gi- v-- t;.t;.~ L£~ £g}l gt;.~ _ ./'y y-- 29t! --",/"v-- gg,,~ --"v v- --"'v v-- >-4 _...I'y"'v-- _...I'v"-r- It;.~ 6t;.~ - -"'1"""'- --"'" v- S. .. ~ N ...... U 9g~ Lg~ -i~ ~~ 19):1 --"" -~(J"- 8t;.~ u -"""g"\ro ,,~ s. Lt;.~ lC) -4~ U 6g~ -~gi- 6£~ co 8~~ (j) lC) u u to9...~ g9~ U -i~ .,... I 0 0 co N ~ . .,... < ~~ .... ,... 0 --"",/'..,-- --"'~~""'- £~ - -"vl\..rt;.~ . "v-- _J\ ~~ v",,- - J'o w. 9~ --"y"..r- 0 l"N . 0 w --'\,"'.,-8~ - -"'v"v-6~ /"v- _Ji. .. -~~):Iv--~~~v-02~ u --" "ort;.Z~ --" """gZ~ co U U ~ <.) 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