Sharp PC-1350
 | |
| A Sharp PC-1350 in RUN mode, with its hard cover above it (photo: Frcoe, public domain) | |
| Specifications | |
|---|---|
| Manufacturer | Sharp Corporation |
| Type | Pocket computer |
| Released | 1984[1] |
| CPU | Sharp SC61860A13 8-bit CMOS, 768 kHz crystal[2] |
| Memory | 4 KB RAM (two HM6116); 40 KB system ROM (8 KB in the processor, 32 KB SC613256); RAM card slot for 8 KB or 16 KB[3][4][5] |
| Storage | Cassette, through the CE-124 or CE-126P[6] |
| Display | LCD, 24 characters × 4 lines, or 150 × 32 dot graphics[3] |
| Sound | — |
| Power | Two CR2032 lithium cells, 6 V DC, 0.03 W[6] |
| Dimensions | 182 × 72 × 16 mm[6] |
| Weight | 190 g including cells[6] |
| OS / Firmware | BASIC in ROM[3] |
| Successor | Sharp PC-1360 |
The Sharp PC-1350 is a pocket computer made by Sharp Corporation, introduced in 1984, with a four-line, 24-character LCD that can also show 150 × 32 dot graphics, BASIC in 40 KB of ROM, 4 KB of RAM, a slot for an 8 KB or 16 KB RAM card and a 15-pin serial port.[1][3][4] It runs on two CR2032 lithium cells. Sharp's service manual for it is dated September 1984.[6][7] The Sharp PC-1360 followed it with two RAM card slots and a larger ROM.[8]
Specifications
[edit | edit source]| Item | Specification |
|---|---|
| Processor | 8-bit CMOS |
| System ROM | 40 KB |
| Memory | System area about 1.6 KB; data area 208 bytes; program and data area 3070 bytes; reserve area 144 bytes |
| Display | LCD: 24 characters × 4 lines of 5 × 7 dots, or 150 × 32 dot graphics |
| Serial I/O | Asynchronous, half duplex, 300, 600 or 1200 baud; 15-pin connector; CMOS levels (4 to 6 V) |
| Memory protection | Program, data and reserve areas backed up by the cells during power-off |
| Auto power-off | About 11 minutes |
| Power supply | 6 V DC, two CR2032 lithium cells |
| Power consumption | 0.03 W |
| Cell life | About 250 hours |
| Operating temperature | 0 to 40 °C |
| Dimensions and weight | 182 × 72 × 16 mm; 190 g including cells |
| Accessories | Hard cover, two templates, two lithium cells fitted, instruction manual, name label |
| Options | CE-124 cassette interface, CE-126P printer and cassette interface, CE-201M 8 KB and CE-202M 16 KB RAM cards |
| Configuration | Bytes |
|---|---|
| PC-1350 alone | 3070 |
| PC-1350 with CE-201M | 11262 |
| CE-201M only | 8142 |
| PC-1350 with CE-202M | 19454 |
| CE-202M only | 16334 |
Hardware
[edit | edit source].png)
| Function | Part |
|---|---|
| Processor | SC61860A13, with 8 KB of internal ROM |
| Gate array | SC60220, decoding chip selects for the RAM and display[9] |
| LCD driver | SC43537 |
| LCD | LF-7117E, 150 × 32 dots (LCD unit DUNT-8038CCZZ) |
| System ROM | 32 KB on the memory board: SC613256 in the block diagram; the parts list also has an LH535624 and describes the memory PWB unit as "ROM: LH535624" |
| RAM | Two HM6116 (2 KB each), on the memory board |
| Crystal | 768 kHz |
| Connectors | 11-pin peripheral connector; 15-pin serial (SIO) connector |
| Boards | Main PWB unit DUNTK8039CCZZ; memory PWB unit DUNTK8040CCZZ |
Two CR2032 cells supply the machine through a resistor (R1) and the BD1 diode pair, with a 3.3 µF capacitor (C1) across the supply. A 20 kΩ variable resistor (VR1) sets the LCD drive voltage, and a resistor divider (R10 to R13) with three 1 µF capacitors (C2 to C4) produces the LCD bias levels.[10][11]
Sharp's figures for current: 20 µA maximum with the power off, 500 µA maximum while displaying and 5 mA maximum during calculation, at 20 °C.[12]
RAM cards
[edit | edit source]The CE-201M (8 KB) and CE-202M (16 KB) RAM cards each carry a CR2025 lithium cell, which Sharp rates at 120 mAh and says keeps a CE-201M's contents for about 34 months and a CE-202M's for about 18 months. The PC-1350 does not work unless the card lock switch is set to LOCK.[12][5] The RAM cards for the PC-1350 cannot be used in the PC-1360.[8]
Documentation
[edit | edit source]Sharp's PC-1350 service manual is hosted on the wiki and described on Sharp PC-1350 Documentation: File:Sharp PC-1350 Service Manual.pdf. It covers the specifications, cell life, current consumption, a test procedure using a test RAM card, the LSIs, the RAM cards, circuit diagrams, board drawings and parts lists.[3]
General maintenance
[edit | edit source]Cells, the re-initialisation after a cell change, RAM cards and cleaning are covered in Sharp PC-1350 General Maintenance.
Troubleshooting
[edit | edit source]Sharp's current limits, cell thresholds and display and key tests are applied in Sharp PC-1350 Troubleshooting Guide.
Capacitor replacement
[edit | edit source]The main board has four small polarised capacitors, C1 to C4, listed in Sharp's service manual. See Sharp PC-1350 Capacitor Replacement Guide.
Related pages
[edit | edit source]- Sharp PC-1350 General Maintenance
- Sharp PC-1350 Troubleshooting Guide
- Sharp PC-1350 Capacitor Replacement Guide
- Sharp PC-1350 Documentation
- Sharp PC-1360
- Sharp PC-1251
References
[edit | edit source]- ↑ 1.0 1.1 Sharp PC-1350, Wikipedia—link(accessed 2026-10-21) Introduced in 1984; superseded in 1987 by the PC-1360.
- ↑ 2.0 2.1 Sharp, Service Manual, PC-1350, parts list, main PWB unit and memory PWB unit (PDF page 29): SC61860A13, SC60220, SC43537LDN, crystal 768 kHz, HM6116, LH535624 and 613256FM56, DUNTK8039CCZZ, DUNTK8040CCZZ, LCD unit DUNT-8038CCZZ.
- ↑ 3.0 3.1 3.2 3.3 3.4 3.5 Sharp Corporation, Service Manual, PC-1350, code 00ZPC1350SM/E, September 1984, section 1 "Specifications", printed page 1 (PDF page 1). Hosted as File:Sharp PC-1350 Service Manual.pdf.
- ↑ 4.0 4.1 4.2 Sharp, Service Manual, PC-1350, section 3 "PC-1350 block diagram", printed page 2 (PDF page 2): LCD LF-7117E, ROM 32 KB SC613256, RAM 2 KB × 2 HM6116, CR2032 × 2, 11-pin peripheral and 15-pin SIO connectors; and section 5 "RAM map", printed page 3 (PDF page 3): 8 KB internal ROM.
- ↑ 5.0 5.1 5.2 Sharp, Service Manual, PC-1350, section 6 "Cautions in using the RAM card option", printed pages 3 to 4 (PDF pages 3 to 4).
- ↑ 6.0 6.1 6.2 6.3 6.4 6.5 Sharp, Service Manual, PC-1350, section 1 (continued) and section 2 "System configuration", printed page 2 (PDF page 2).
- ↑ Sharp, Service Manual, PC-1350, back cover (PDF page 35): "1984 September, Printed in Japan".
- ↑ 8.0 8.1 Sharp Corporation, Service Manual, Model PC-1360, August 1986, section 2 "Introduction", printed page 1 (PDF page 1): two RAM card slots; the PC-1350's CE-201M and CE-202M cannot be used. Hosted as File:Sharp PC-1360 Service Manual.pdf.
- ↑ Sharp, Service Manual, PC-1350, section 8 "LSI descriptions", SC60220 gate array, printed page 11 (PDF page 11).
- ↑ Sharp, Service Manual, PC-1350, section 10 "Circuit diagram (1)", printed page 13 (PDF page 13).
- ↑ Sharp, Service Manual, PC-1350, section 11 "Parts and signal layout chart (main PWB)", printed page 17 (PDF page 17).
- ↑ 12.0 12.1 Sharp, Service Manual, PC-1350, section 4 "Battery life and power consumption", printed page 3 (PDF page 3).