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Info for pc88srl


====== NEC PC-8801 series (1985) ======




===== Features =====

* CPU: uPD780C-1(Z80A compatible) 4 MHz
* RAM: 64 KB (up to 576 KB)
* VRAM: 48 KB
* ROM: 72 KB
* Text Modes: 36/40/72/80 characters x 20/25 lines
* Graphic Modes: 640 x 200 (8 colours), 640 x 400 (Monochrome)
* Colors: 8
* Sound: Beeper
* I/O Ports: 4 expansion slots, Tape recorder (600/1200 baud), RS232C, CRT (MONO/DIGITAL), Centronics
* Keyboard: Full-stroke keyboard 67 key + 20 key numeric pad + 5 function keys
* Peripherals: Dual 5" (2x320 KB) or 8" (2x1 MB) floppy drive unit
* Built In Language: N88-BASIC, N-BASIC (PC8001 MODE)



===== Known Issues =====

== Status ==

CPU, text or graphics, YM-2203 sound(YM-2608 not yet), Extended RAM, 5'2D disk drives and Kanji ROM emulated.

NOTE: Currently, each model is separated which use "High-resolution" display and "Low-resolution" display. Because I don't know how to change display resolution and HSYNC frequency dynamically (when machine is running).

== ROM ==

BIOS images has same format as one of images for M88 emulator, but "disk.rom" is only used first 2K bytes, that is, you must truncate
last 6KB of "disk.rom".

== Disk Emulation ==

The D88 format disk image is supported now, but multiple disks image files are not supported, That is, disk in image file must be only
one. The D88 disk image format is supported by more PC-8801 emulators.

== To Do ==

Integrate "high-resolution" and "low-resolution" mode, optimization of CPU switching, more accurate speed(memory wait and DMAC overhead), YM-2608 sound, Joystick and mouse, 5'2HD or 8'2D floppy disk drives, Font substitution, Kana-Kanji dictionary ROM, test
ROMs of other models, multiple disks image support, source clean-up, printer, RS-232C, CD-ROM, more good English documentation



===== History and Trivia =====

Early Z80 based computer commonly used in Japan

The NEC PC 8801 was the successor of PC 8001. It offered fine colour graphics. It had an optional MS-Dos board. It was one of the fist, if not the first color CPM computer.

It ran in three bootable modes: CPM, MS-Dos, and N88-Basic. The N-Basic would natively boot on the system without disk, just like the PC 8001. It also had a software / hardware switch to turn it into PC 8001 mode.

//(info from old-computers.com)//



===== Links =====

* Aoto's PC-88 Page -- http://www1.plala.or.jp/aoto/index.html
* Cisc's PC-88 Page -- http://retropc.net/cisc/m88/
* Factorian!'s PC-88 Page -- http://www.kiwi-us.com/~ohta/pc88/index.htm
* PC-8801 at old-computers.com -- http://www.old-computers.com/museum/computer.asp?c=398



===== Other Emulators =====

* M88 -- http://retropc.net/cisc/m88/
* QUASI88 -- http://www.117.ne.jp/~show/pc8801/pc88emu.html
* Project X88000 -- http://www.geocities.com/Area51/Dungeon/6809/x88000.html
* PC88Win -- http://home.highway.ne.jp/soltin/pc88win.html




Generated on Sun Jul 19 10:17:28 2009