Contents |
Description
The HB-75 is the big brother of the HB-55 as it comes with more RAM and a better keyboard. The following models exist:
| Product | Region | PSU | Keyboard | Video and audio out | Colour | Expansion |
|---|---|---|---|---|---|---|
| Sony HB-75 | JP | 100V 60Hz | QWERTY/JP50on | RF, Composite video and audio | Black or White | 1 Cart + 1 Exp |
| Sony HB-75AS | AU | 240V 50Hz | QWERTY with £ key | RF, RGB SCART, Composite V+A DIN | Black | 2 Cartridges |
| Sony HB-75B | UK | 240V 50Hz | QWERTY with £ key | RF, RGB SCART, Composite V+A DIN | Black | 2 Cartridges |
| Sony HB-75D | DE | 220V 50Hz | QWERTZ | RF, RGB SCART, Composite V+A DIN | Black | 2 Cartridges |
| Sony HB-75F | FR | 220V 50Hz | AZERTY | RGB SCART | Black | 2 Cartridges |
| Sony HB-75P | Europe | 220V 50Hz | QWERTY with £ key | RF, RGB SCART, Composite V+A DIN | Black | 2 Cartridges |
The machine comes with a built-in Personal Databank with saving on cassette tape or the included HBI-55 data cartridge.
The Japanese model has only one cartridge slot, but the expansion bus can not be used as second cartridge slot. On the international versions, the expansion bus slot is replaced by a second cartridge slot.
The firmware is launched automatically when you boot the machine.
| Brand | Sony |
| Model | HB-75 / HB-75AS / HB-75B / HB-75D / HB-75F / HB-75P |
| Year | 1984 |
| Region | See table above |
| Launch price | DE: 998 DM JP: ¥69,800 NL: ƒ1299 UK: £299 |
| RAM | 64kB in slot 2 |
| VRAM | 16kB |
| Media | MSX cartridges |
| Video | Texas Instruments TMS9918ANL (HB-75) or TMS9929A (other models) |
| Audio | PSG (AY-3-8910A or YM2149F) |
| Chipset | none (separate IC's) |
| Keyboard layout | see table above |
| Extras | reset button, firmware (Personal Databank), (only with HB-75) HBI-55 S-RAM data cartridge |
| Emulation | ROMs dumped and emulated for HB-75, HB-75D and HB-75P versions. The HB-75 rear expansion port is handled like a regular MSX cartridge slot. ROM dumps needed for all other versions. See this thread for details |
Pictures
Check also the pages about the different models!
Specifications
The HB-75 is a MSX1 with a Z80A from NEC (D780C-1). Its RAM is in slot 2.
Slot Map for HB-75 model
| Slot 0 | Slot 1 | Slot 2 | Slot 3 | ||||
|---|---|---|---|---|---|---|---|
| Page C000h~FFFFh | Front cartridge slot | 64kB RAM | Expansion Bus | ||||
| Page 8000h~BFFFh | DataBank | ||||||
| Page 4000h~7FFFh | Main-ROM | ||||||
| Page 0000h~3FFFh |
Slot Map for other models
| Slot 0 | Slot 1 | Slot 2 | Slot 3 | ||||
|---|---|---|---|---|---|---|---|
| Page C000h~FFFFh | Front cartridge slot | 64kB RAM | Back cartridge slot | ||||
| Page 8000h~BFFFh | DataBank | ||||||
| Page 4000h~7FFFh | Main-ROM | ||||||
| Page 0000h~3FFFh |
Connections
- RF output (on all models except HB-75F)
- Analog sound output (mono) and composite output (only HB-75)
- 6-pin DIN Audio/Video connector on HB-75AS, HB-75B, HB-75D and HB-75P
- RGB output (SCART) on HB-75AS, HB-75B, HB-75D, HB-75F and HB-75P
- Data Recorder connector
- Centronics compatible Parallel port for a printer
- 2 general connectors (Joysticks, Mouse, Paddle controllers, etc)
- 1 cartridge slot (HB-75) or 2 cartridge slots (other models)
- 1 specific I/O port expansion bus with two polarizing keys (only HB-75)
- Power plug for main power supply
Upgrades
Adding a disk drive to this system has the effect that the firmware menu (Personal Data Bank) is skipped on startup. If both a disk drive and S-RAM cartridge, such as the HBI-55 is present the menu is not skipped, but the disk drive is disabled. No workaround is available for this.
External links
- Manual HB-55P / HB-75-P / HB-75B (Spanish, Dutch, Swedish, Italian)
- Introduction to MSX-BASIC
- Service Manual HB-55P / HB-75P / HB-75B
- Blog post about the HB-55 and 75 (Korean)
- Blog post about the HB-75P (Korean)
Pages in category "Sony HB-75"
The following 6 pages are in this category, out of 6 total.