About
Two programs from Einstein User's fourth issue, September 1985, on one disc.
GDUMP is Tatung's own graphics screen dump, published in the magazine as assembler source and a hex dump across pages 12 to 14. Type GDUMP at the DOS prompt and the screen goes to an Epson RX-80 or compatible printer in single density graphics. It was published with a notice: free to registered end users, not for commercial redistribution.
MORSE, from the Dear Dr Clarke column on page 26, is a Morse decoder written by radio amateur M.A. Pugh (G4VDP) for an audio interface on analogue port 1, as corrected in the column.
Running them
GDUMP runs from the DOS prompt. For the decoder, type XBAS, then LOAD "MORSE" and RUN.
What is in the download
A zip holding the disc as a DSK, the same disc as an MFI for MAME to write to, the GDUMP assembler source and binary, the Morse listing as BASIC text and tokenised, and a README.
Verified
Run in MAME 0.289 with Xtal BASIC 4.2 and MOS 1.2. The transcribed GDUMP source assembles to exactly the magazine's printed hex dump, 121 bytes identical, and with a printer attached it sends the Epson parameter block and then the screen as graphics, with the captured bands decoding back to the screen it read, pixel for pixel. The emulated printer stops accepting after about 4 KB, so that capture covers the top 120 lines. MORSE loads and runs, but cannot be driven under emulation because the fire button bit it reads is latched there. Not run on real hardware.
The scanned issue is on this site as Tatung Einstein User Vol.1 No.4.
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