Sharp PC-1500

Template:More citations needed Template:Infobox information appliance The Sharp PC-1500 was a pocket computer produced by Sharp between 1981 and 1985. A rebadged version was also sold as the TRS-80 Pocket Computer PC-2.

The whole computer was designed around the LH5801, an 8-bit CPU similar to the Zilog Z80, but all laid-out in power-saving CMOS circuits. Equipped with 2 KB of on-board RAM, the programming language is BASIC. Later, German engineers provided an assembler for the machine.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> Later even a C compiler followed. An external slot is available and accepts memory (from 4 KB to 32 KB) and ROM modules.

Eight versions of this pocket computer with 2 KB memory:<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

Sharp PC-1500 - Japanese version (1981)
Sharp PC-1500 - Japanese version with blue paint around LCD. CE-157 Kana module bundle model. Known as PC-1500D (1984)
Sharp PC-1500 - European, Australasian and North American version (1982)
Sharp PC-1500 RP2 - Brazilian version (1982)
HiradasTechnika PTA-4000 - Hungarian licence.
HiradasTechnika PTA-4000+16 - Hungarian licence (with internal 16 KB memory extension)
Tandy TRS-80 PC-2
Nanfeng PC-1500A - Chinese license (CKD assembly from Japanese components)

Two versions with 8 KB memory:

Sharp PC-1501 - Japanese rework with 8 KB memory (1984)
Sharp PC-1500A - Western rework with 8 KB memory (1984)

Technical specificationsEdit

156×8 pixel LCD
Integrated speaker
Integrated RTC
Memory/cartridge slot
60-pin expansion port for printer and tape drive
Battery slot (4×AA)
Connector for external power supply (Official adaptor is Sharp EA-150, rated at 500 mA at 9 V, comes with the CE-150 printer interface.)

AccessoriesEdit

CE-150 4-colour printer/plotter and cassette interface in travel case. Known as KA-160 with PTA-4000.
CE-151 4 KB memory module
CE-152 Cassette recorder (as external storage) (same as General Electric 3-5160A<ref>{{#invoke:citation/CS1|citation

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CE-153 Software board
CE-154 Wallet dedicated to PC-1500 + CE-150 + CE-152 + CE-153
CE-155 8 KB memory module
CE-156 Tape with Katakana software
CE-157 4 KB memory module with CR2032 battery data backup and Katakana chars ROM
CE-158 Communication dock with RS-232C and parallel interface with (4 rechargeable, shrink-wrapped, permanently built-in) NiCd battery (AA) as additional power supply for the computer.
CE-159 8 KB memory module with CR2032 battery data backup
CE-160 7.6 KB read only memory module with CR2032 battery data backup
CE-161 16 KB memory module with CR2032 battery data backup
CE-162E Tape and parallel port interface
CE-163 32 KB (2x16 KB) dual-page memory module with CR2032 battery data backup. Only one page (16 KB) can be accessed at a time, switchable via the following command in PROG mode:

                    Page 0 : POKE&5804,0 [enter]
                    Page 1 : POKE&5804,1 [enter]

Related Sharp pocket computersEdit

File:Advanced Systems & Computer Products - Sharp PC-1500A - May 1987 Puget Sound ComputerUser advert.jpg

An advertisement for the Sharp PC-1500A from the Puget Sound ComputerUser.

Sharp PC-1210
Sharp PC-1211
Sharp PC-1251
Sharp PC-1500
Sharp PC-1500A upgrade version with 8 KB onboard RAM
Sharp PC-1501 Japanese version of PC-1500A
Sharp PC-1600 with more memory and larger multi-line LCD display and more graphics capabilities

BASIC compatibility with early modelsEdit

Some earlier model PC-1500s will show a value 1 less in the FOR...NEXT counter on exiting the loop compared to later PC-1500s and the PC-1600.<ref>Sharp PC-1600 Operation Manual, 1986, p.355.</ref>

For example:

<syntaxhighlight lang="basic"> 10 FOR K=1 TO 10 20 NEXT K 30 PRINT K </syntaxhighlight>

K will be set to 11 on later model PC-1500s and PC-1600s, but will be 10 on early PC-1500s.

Consider this example:

<syntaxhighlight lang="basic"> 10 S=0 20 FOR K=1 TO 10 STEP 4 30 S=S+1 40 NEXT K 50 PRINT S </syntaxhighlight>

S will be set to 3 on later model PC-1500s and PC-1600s, but will be 4 on early PC-1500s.

Early model PC-1500s evaluate IF...THEN statements differently. The behaviour can be summarised thus:

Model	Template:Yes	Template:No
PC-1600 / Later PC-1500	≠0	0
Early PC-1500	>0	<0

An early model PC-1500 can be detected by using the command: <syntaxhighlight lang="basic" inline>PEEK&C5C0</syntaxhighlight>.

If the value returned is 6, it is an early model.

Example program in BASICEdit

 1 ARUN 10
 5 REM   "PC1500 VAT Program:"
10 INPUT "Price: ";P
20 PRINT P;"  ";P*V;"  ";P*V*M   
30 GOTO 10
40 END

</syntaxhighlight> The PC-1500 allows special abbreviations, and the syntax can also look as follows: <syntaxhighlight lang="basic">

20 PRINT P;"  ";PV;"  ";PVM

</syntaxhighlight>

Usage of variablesEdit

P = Purchase Price
V = VAT (%/100)     - To be input by hand before calculation begins, e.g.: V=1.14 (Enter)
M = Markup (%/100)  - To be input by hand before calculation begins, e.g.: M=1.15 (Enter)

Display of the answers are as followsEdit

Answer1;            Answer2;         Answer3
Purchase Price;     VAT Price;       Sales Price
Value: P;           Value: P*V;      Value: P*V*M

Program descriptionEdit

Template:Aligned table

SignificanceEdit

The design of initial prototypes of EMKE series of public transport cash registers were built around customized versions of the PC-1500 and its Hungarian clone PTA-4000. The series production models used almost exclusively in Hungarian regional and national bus services up to present day, are built around a version designed by EMKE and are heavily influenced by the PC-1500 design.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>