Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!watmath!clyde!floyd!harpo!decvax!ittvax!ittral!burke From: burke@ittral.UUCP (Michael G. Burke) Newsgroups: net.micro.trs-80 Subject: PC2 information Message-ID: <381@ittral.UUCP> Date: Thu, 8-Mar-84 10:08:20 EST Article-I.D.: ittral.381 Posted: Thu Mar 8 10:08:20 1984 Date-Received: Sat, 10-Mar-84 07:12:42 EST Lines: 64 There is quite a bit of information available about the PC-2. (It is essentially the same thing as the Sharp PC-1500). One place you may try looking is in Radio Shack's TRS-80 Microcomputer News magazine(no, I'm not talking about the Wayne Green publication with a similar name). Since about this time last year, they have been running a series of articles about the PC-2, including memory map, machine language for the processor inside(it's a proprietary type), entry points for ROM routines, etc. >From what I understand, the magazine is available by subscription, and Radio Shack does not keep back issues around, at least not officially. Try the Radio Shacks or their computer centers in your area, you might get lucky and find one that does keep them around anyway. Another good source of information is the PC-1500 Technical Reference Manual that Sharp publishes. It is 160 8-1/2 by 11 pages and costs about $20, if I remember correctly. The information is more complete than that in the magazine mentioned above. Chapters in the book cover the LH5801 microprocessor, the LH5810/5811 I/O port controller, description of the PC-1500 hardware and software including some of the Basic subroutines, and a last chapter with some programming examples such as how to inverse video the LCD display with a machine language program. The book does have two disadvantages: first, there are gaps in the information(for example, it doesn't say where the Basic start and end of program pointers are kept), and second it is rather creatively translated from Japanese. I ordered my copy from a place called Atlantic Northeast Marketing PO Box 921 Marblehead, MA 01945 617-639-0285 (they also carry service manuals, if you just want the schematics and service info) One last source of information is a publication called Pocket Computer Newsletter. They cover more than just the PC-2/PC-1500, though these are the best covered. Some of the things the have published are 1) information on machine language instructions, including a disassembler program, about a year before the other two publications mentioned above. 2) a line renumbering program that also changes line references in gotos and gosubs 3) information on how to add a new character set to the LCD display by changing the character rom pointer (something else that is not mentioned in the Technical Reference manual) Subscriptions are about $18/yr, I think, and their address is Pocket Computer Newsletter PO Box 232 Seymour, CT 06483 (203)-888-1643 ----------------------- Have fun! Michael Burke Raleigh,NC !ittvax!ittral!burke